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Contents
- The climate of Kalmunai
- The best time to visit Kalmunai
- The worst time to visit Kalmunai
- Spring weather in Kalmunai
- Summer weather in Kalmunai
- Autumn weather in Kalmunai
- Winter weather in Kalmunai
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Kalmunai
Located on the eastern coastline of Sri Lanka, Kalmunai is characterized by the Köppen climate classification as Af, meaning it exemplifies a tropical rainforest climate. As such, the city experiences constant warmth all year round coupled with a high level of humidity. This type of weather comes from global latitude and geographical features around the region, ensuring a fairly predictable pattern of weather.
Throughout the year, Kalmunai maintains a relatively stable climate, with temperatures rarely deviating excessively from their monthly averages. The highest average temperature reaches up to 33°C (91.4°F) in June while the lowest average doesn’t go below 24°C (75.2°F), which occurs from January to March. Meanwhile, relative humidity fluctuates just slightly throughout the year, averaging around 80% in January and dipping to 68% in June and July. This means that Kalmunai is generally humid year-round, which is typical of a tropical rainforest climate.
Rainfall in Kalmunai exhibits a unique pattern throughout the year. The city receives the most rain in December, measuring 272mm (10.71"), and the least amount in June with 30mm (1.18"). The months with the most rainfall days are October, November and December, all tallying on average more than 25 days. Sea temperatures hover around 28°C (82.4°F) to 29.8°C (85.6°F), with the warmest waters recorded from April to September.
The duration of daylight shows a slight variation in Kalmunai, from the shortest at 11.7 hours in January and December to the longest at 12.6 hours in June. The amount of sunshine hours also fluctuates throughout the year, with the maximum hours recorded in May and June (11.8 hours) and the least in December (5.4 hours).
Throughout the year, Kalmunai maintains a relatively stable climate, with temperatures rarely deviating excessively from their monthly averages. The highest average temperature reaches up to 33°C (91.4°F) in June while the lowest average doesn’t go below 24°C (75.2°F), which occurs from January to March. Meanwhile, relative humidity fluctuates just slightly throughout the year, averaging around 80% in January and dipping to 68% in June and July. This means that Kalmunai is generally humid year-round, which is typical of a tropical rainforest climate.
Rainfall in Kalmunai exhibits a unique pattern throughout the year. The city receives the most rain in December, measuring 272mm (10.71"), and the least amount in June with 30mm (1.18"). The months with the most rainfall days are October, November and December, all tallying on average more than 25 days. Sea temperatures hover around 28°C (82.4°F) to 29.8°C (85.6°F), with the warmest waters recorded from April to September.
The duration of daylight shows a slight variation in Kalmunai, from the shortest at 11.7 hours in January and December to the longest at 12.6 hours in June. The amount of sunshine hours also fluctuates throughout the year, with the maximum hours recorded in May and June (11.8 hours) and the least in December (5.4 hours).
The best time to visit Kalmunai
Considering the climatic conditions, the ideal time to visit Kalmunai is from January to March. During these months, the city experiences less rainfall, between 88mm (3.46") and 39mm (1.54"), coupled with a slightly less humid atmosphere, having humidity levels below 80%. The sea temperature is also enticingly warm, ranging from 27.3°C (81.1°F) to 28.9°C (84°F), making it ideal for water-based activities.
The worst time to visit Kalmunai
On the contrary, the months of October, November and December may not be the most favorable to visit Kalmunai. These months register the highest rainfall amount, from 177mm (6.97") to 272mm (10.71"), and the most rainfall days, each approximately 25 days on average. The climate during these months, accompanied by relative humidity values of 79% to 81%, could make exploring the city less comfortable.
Spring weather in Kalmunai
In Kalmunai, spring season from March to May brings about gradually increasing temperatures, rising from 30.1°C (86.2°F) to 32.7°C (90.9°F). During spring, Kalmunai also sees a slight increase in rainfall, from 39mm (1.54") in March to 79mm (3.11") in May. The duration of daylight and sunshine hours also follow an increasing trend, with the latter averaging from 9.4 hours in March to 11.6 hours in May. The sea warms up during spring, with temperatures rising to 29.8°C (85.6°F) by the end of May.
Summer weather in Kalmunai
Summer in Kalmunai, which lasts from June to August, is the warmest period of the year. Average temperatures remain above 32°C (89.6°F). Despite this consistent warmth, rainfall is relatively low in June at 30mm (1.18"), but increases to 55mm (2.17") in August. Average number of sunshine hours reaches its maximum in this season, averaging about 11.7 hours per day. Sea temperatures during these months hover around 29°C (84.2°F), providing ideal conditions for swimming and other water activities.
Autumn weather in Kalmunai
Autumn in Kalmunai, from September to November, is characterized by steadily decreasing temperatures, from 31.8°C (89.2°F) to 29.3°C (84.7°F), coupled with escalating rainfall, from 81mm (3.19") to 220mm (8.66"). This marks the onset of the peak rainy season, with November witnessing the second-highest rainfall of the year. Despite this increase in rainfall, sea temperatures remain relatively stable, around 28.8°C (83.8°F) to 28.8°C (83.8°F).
Winter weather in Kalmunai
Winter in Kalmunai, occurring in December and extending to February, experiences a mild drop in temperatures, with averages between 27.3°C (81.1°F) and 28°C (82.4°F). However, December sees the highest rainfall measurements of 272mm (10.71"), making it the wettest month of the year. By January and February, rainfall lessens significantly to 120mm (4.72") and 88mm (3.46") respectively. Despite the rainfall, sea temperatures remain invitingly warm, averaging from 27.3°C (81.1°F) to 28°C (82.4°F).
Weather in January
The onset of the year in Kalmunai, Sri Lanka is marked by predominantly humid weather. Differences in temperature remain minimally from 24°C (75.2°F) to 27.3°C (81.1°F), instigating moderate warmth across the region. The city experiences a relative humidity of 80% providing a slightly balmy ambience. Weather in January »
Weather in February
A slight elevation is noticed in Kalmunai's climatic conditions during February. Average maximum and minimum temperatures almost mirror those of January. However, rainfall levels considerably decrease to 88mm (3.46"), contrasting with the previous month's showers. Weather in February »
Weather in March
March presents an interesting transitional phase in weather patterns in Kalmunai. The temperature continues its rise, but the city sees a departure from the pervasive rain of the previous months, with rainfall dwindling to 39mm (1.54"). Weather in March »
Weather in April
April in Kalmunai showcases a radical shift in weather tendencies. The temperature increases beyond the 30°C (86°F) mark, indicating the arrival of peak summer. However, climate patterns revolve with rainfall reaching 57mm (2.24") from a low of 39mm (1.54") in March. Weather in April »
Weather in May
May continues to uphold the summer season in Kalmunai with the city's temperatures peaking around 32.7°C (90.9°F). The amplified temperatures align with the city's tropical climate. Rainfall and humidity remain without any drastic change, making the month humid and warm. Weather in May »
Weather in June
June brings some respite from Kalmunai's soaring temperatures, with a slight drop to an average maximum of 33°C (91.4°F). Additionally, the town sees a significant decrease in rainfall, alluding to the dry end of the monsoon season. Weather in June »
Weather in July
July continues the summer trend ceasing the downward shift witnessed in June. The weather pattern is near-identical to June, with only minor fluctuations in temperature and rainfall. This relative stability in weather parameters creates a predictable climate, featuring typical characteristics of a tropical summer. Weather in July »
Weather in August
The eight month sees a transition in weather patterns in Kalmunai. Marked by a decrease in temperature, August breaks away from the preceding summer months. Rainfall and humidity indicate a slight increase, hinting at the return of monsoon. Weather in August »
Weather in September
As August bows out with a small hint of monsoon, September amplifies the rainfall right back to 81mm (3.19"). Climatic conditions elicit the sense of the approaching wet season. However, temperatures remain relatively high, providing a juxtaposed experience of warm days and sublime showers. Weather in September »
Weather in October
The month of October marks the onset of the second monsoonal phase in Kalmunai. Rainfall climbs up to 177mm (6.97") adding a distinctly moist charm to the city. Aside from rainfall, all other parameters experience a slight decrease, enhancing the cool and soothing effect of monsoon. Weather in October »
Weather in November
November sees a continuation of the monsoonal impact in Kalmunai. The city witnesses the highest rainfall of the year at 220mm (8.66") keeping the city damp and cool. With climate shifts to the cooler end of the spectrum, residents pull out their raincoats and umbrellas. Weather in November »
Weather in December
As the year concludes in Kalmunai, the monsoon season reaches its peak. Despite the year drawing to a close, rainfall continues to dominate with a record 272mm (10.71"), higher than any previous month. However, average temperatures drop marginally diffusing a slight chill into the air. Weather in December »
Updated: Feb 6, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Kalmunai?
During the coldest month in Kalmunai, January, temperatures average a high of 27.3°C (81.1°F) and a low of 24°C (75.2°F).
How many days does it rain in Kalmunai?
Throughout the year, in Kalmunai, Sri Lanka, there are 237.8 rainfall days, and 1259mm (49.57") of precipitation is accumulated.
What is the month with the coldest sea water in Kalmunai?
The month with the coldest seawater is January, with an average sea temperature of 27.3°C (81.1°F).
What are the months with the highest UV index in Kalmunai?
January through October, with an average maximum UV index of 7, are months with the highest UV index.
What are the months with the warmest sea water in Kalmunai?
April and May, with an average sea temperature of 29.8°C (85.6°F), are months with the warmest seawater in Kalmunai.
What time of the year is the hottest in Kalmunai?
Kalmunai experiences its highest temperatures in June, with an average peak of 33°C (91.4°F) and a low of 26.3°C (79.3°F).
What is the least humid month in Kalmunai?
The months with the lowest humidity in Kalmunai, Sri Lanka, are June and July, with an average relative humidity of 68%.
What is the driest month in Kalmunai?
The month with the least rainfall in Kalmunai is June, when the rain falls for 15.3 days and typically collects 30mm (1.18") of precipitation.
When are the longest days in Kalmunai?
The month with the longest days is June, with an average of 12h and 30min of daylight.
What month has the most sunshine in Kalmunai?
The month with the most sunshine in Kalmunai, Sri Lanka, is June, with an average of 11.8h of sunshine.
When is the lowest UV index in Kalmunai?
November and December, with an average maximum UV index of 6, are months with the lowest UV index in Kalmunai, Sri Lanka.
What is the most humid month in Kalmunai?
The most humid month in Kalmunai is December, with an average relative humidity of 81%.
What is the wettest month in Kalmunai?
December is the month with the most rainfall. Rain falls for 25.2 days and accumulates 272mm (10.71") of precipitation.
What is the month with the shortest days in Kalmunai?
The month with the shortest days in Kalmunai is December, with an average of 11h and 42min of daylight.
Is there Daylight Saving Time (DST) in Kalmunai?
Kalmunai, Sri Lanka, does not utilize Daylight Saving Time (DST). +0530 timezone is used throughout the entire year.
What is the month with the least sunshine in Kalmunai?
With an average of 5.4h of sunshine, December has the least sunshine of the year in Kalmunai.
Average temperature
Kalmunai, Sri Lanka
The warmest month (with the highest average high temperature) is June (33°C).
The month with the lowest average high temperature is January (27.3°C).
The month with the highest average low temperature is May (26.6°C).
The coldest month (with the lowest average low temperature) is January (24°C).
Average pressure
Kalmunai, Sri Lanka
- Average pressure in January:
1011.8mbar - Average pressure in February:
1011.5mbar - Average pressure in March:
1010.8mbar - Average pressure in April:
1009.5mbar - Average pressure in May:
1007.7mbar - Average pressure in June:
1007.3mbar
- Average pressure in July:
1007.5mbar - Average pressure in August:
1007.9mbar - Average pressure in September:
1008.8mbar - Average pressure in October:
1009.4mbar - Average pressure in November:
1009.7mbar - Average pressure in December:
1010.4mbar
The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1007.3mbar).
Average wind speed
Kalmunai, Sri Lanka
- Average wind speed in January:
13.9km/h - Average wind speed in February:
12.3km/h - Average wind speed in March:
10.3km/h - Average wind speed in April:
9.8km/h - Average wind speed in May:
9.2km/h - Average wind speed in June:
10.5km/h
- Average wind speed in July:
10.9km/h - Average wind speed in August:
10.2km/h - Average wind speed in September:
9.1km/h - Average wind speed in October:
9.4km/h - Average wind speed in November:
10.7km/h - Average wind speed in December:
13km/h
The windiest month (with the highest average wind speed) is January (13.9km/h).
The calmest month (with the lowest average wind speed) is September (9.1km/h).
Average humidity
Kalmunai, Sri Lanka
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are June and July (68%).
Average rainfall
Kalmunai, Sri Lanka
The wettest month (with the highest rainfall) is December (272mm).
The driest month (with the least rainfall) is June (30mm).
Average rainfall days
Kalmunai, Sri Lanka
- Average rainfall days in January:
18.7 days - Average rainfall days in February:
15.3 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
19.1 days - Average rainfall days in May:
20.7 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
20.6 days - Average rainfall days in September:
22 days - Average rainfall days in October:
25.5 days - Average rainfall days in November:
25.5 days - Average rainfall days in December:
25.2 days
The months with the highest number of rainy days are October and November (25.5 days).
The month with the least rainy days is March (12.8 days).
Average sea temperature
Kalmunai, Sri Lanka
The best months for swimming (with the highest average sea temperature) are April and May (29.8°C).
The coldest month (with the lowest average sea temperature) is January (27.3°C).
Average daylight / Average sunshine
Kalmunai, Sri Lanka
- Average daylight in January:
11h and 4min - Average daylight in February:
11h and 5min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 2min - Average daylight in May:
12h and 3min - Average daylight in June:
12h and 3min
- Average daylight in July:
12h and 3min - Average daylight in August:
12h and 2min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 5min - Average daylight in December:
11h and 4min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in January:
7h and 3min - Average sunshine in February:
8h and 1min - Average sunshine in March:
9h and 2min - Average sunshine in April:
11h and 1min - Average sunshine in May:
11h and 4min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
11h and 4min - Average sunshine in August:
11h and 4min - Average sunshine in September:
10h and 4min - Average sunshine in October:
8h and 4min - Average sunshine in November:
7h and 4min - Average sunshine in December:
5h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days
Kalmunai, Sri Lanka
- Average sunshine days in January:
8.3 days - Average sunshine days in February:
10.8 days - Average sunshine days in March:
15.5 days - Average sunshine days in April:
7.4 days - Average sunshine days in May:
6.2 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
11.2 days - Average sunshine days in August:
6.9 days - Average sunshine days in September:
5.8 days - Average sunshine days in October:
4.4 days - Average sunshine days in November:
3.2 days - Average sunshine days in December:
4.2 days
The month with the most sunshine days is March (15.5 days).
The month with the least sunshine days is November (3.2 days).
Average UV index
Kalmunai, Sri Lanka
The months with the highest UV index are January, February, March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are November and December (UV index 6).
Average cloud cover
Kalmunai, Sri Lanka
The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is April (Cloud cover 22).
Average visibility
Kalmunai, Sri Lanka
The months with the highest visibility are January, February, March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are November and December (9km).
Kalmunai, Sri Lanka
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