Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Undugoda's weather in September indicates an average high-temperature of a still moderately hot 29.5°C (85.1°F), nearly consistent with the 29.2°C (84.6°F) of August. The temperature dips to an average of 21.1°C (70°F) during September nights.Heat index
September's mean heat index is evaluated at a sweltering 35°C (95°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
In Undugoda, the average relative humidity in September is 77%.Rainfall
In Undugoda, during September, the rain falls for 23.4 days and regularly aggregates up to 118mm (4.65") of precipitation. Throughout the year, there are 278.4 rainfall days, and 1466mm (57.72") of precipitation is accumulated.Daylight
In Undugoda, Sri Lanka, the average length of the day in September is 12h and 10min.On the first day of the month, sunrise is at 06:00 and sunset at 18:16. On the last day of September, sunrise is at 05:56 and sunset at 18:00 +0530.
Sunshine
The average sunshine in September is 10.3h.UV index
The months with the highest UV index are January through September, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a regular UV index of 6 translates into these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How much does it rain in Undugoda in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Undugoda have in September?
When is the highest UV index?
How high is the UV index in September?
Average temperature in September
Undugoda, Sri Lanka
- Average high temperature in September: 29.5°C
The warmest month (with the highest average high temperature) is March (31.5°C).
The month with the lowest average high temperature is December (27.5°C).
- Average low temperature in September: 21.1°C
The months with the highest average low temperature are May and June (21.8°C).
The coldest month (with the lowest average low temperature) is February (18.1°C).
Average pressure in September
Undugoda, Sri Lanka
- Average pressure in September: 1009.3mbar
The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1008.1mbar).
Average wind speed in September
Undugoda, Sri Lanka
- Average wind speed in September: 10.8km/h
The windiest month (with the highest average wind speed) is June (13.5km/h).
The calmest month (with the lowest average wind speed) is April (4.7km/h).
Average humidity in September
Undugoda, Sri Lanka
- Average humidity in September: 77%
The month with the highest relative humidity is December (84%).
The month with the lowest relative humidity is March (74%).
Average rainfall in September
Undugoda, Sri Lanka
- Average rainfall in September: 118mm
The wettest month (with the highest rainfall) is October (301mm).
The driest month (with the least rainfall) is January (38mm).
Average rainfall days in September
Undugoda, Sri Lanka
- Average rainfall days in September: 23.4 days
The month with the highest number of rainy days is May (28.6 days).
The month with the least rainy days is January (14.1 days).
Average daylight in September /
Average sunshine in September
Undugoda, Sri Lanka
- Average daylight in September: 12h and 1min
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 September: 10h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Undugoda, Sri Lanka
- Average sunshine days in September: 3.9 days
The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is May (1.2 days).
Average UV index in September
Undugoda, Sri Lanka
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, November and December (UV index 6).
The month with the lowest UV index is October (UV index 5).
Average cloud cover in September
Undugoda, Sri Lanka
- Average cloud cover in September: 34
The months with the most cloud cover are November and December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 27).
Average visibility in September
Undugoda, Sri Lanka
- Average visibility in September: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, November and December (8km).
Undugoda, Sri Lanka
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