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Contents
- The climate of Waterloo
- The best time to visit Waterloo
- The worst time to visit Waterloo
- Spring weather in Waterloo
- Summer weather in Waterloo
- Autumn weather in Waterloo
- Winter weather in Waterloo
- 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 daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Waterloo
Waterloo, with its position in Sierra Leone, has a climate that is predominantly classified as a tropical monsoon or 'Am' under the Köppen climate classification. The location experiences high temperatures throughout the year, with the lowest average temperatures recorded at 23.9°C (75°F), and the maximum reaching up to 31.4°C (88.5°F).
An examination of the climate information reveals that relative humidity ranges between 68% in January and a peak of 86% in August. Notably, rainfall patterns exhibit a significant monsoonal pattern. Waterloo receives minimal rainfall at the start and end of the year, from 1mm (0.04") to 2mm (0.08") between January and February, and 7mm (0.28") in December, with an extreme augmentation from May to October. In these months, rainfall can reach an astonishing 391mm (15.39") and the area can experience rainfall as much as 30.3 days per month.
Sunshine hours and daylight hours display modest fluctuation throughout the year, from a minimum of 11.6 daylight hours and 4.8 sunshine hours to maximums of 12.6 daylight hours and 9.9 sunshine hours. An interesting weather pattern emerges in terms of cloud cover, which appears to mirror the rainfall cycle. A low of 11% cloud coverage increases substantially to 67% during high rainfall months.
The wind speed varies throughout the year, with the maximum gust measured at 18.4km/h (11.4mph), mostly occurring in the peak rainy season. It's associated with increased moisture levels and reduced visibility of 9km (5.6mi) from July to September when trade winds intensify.
An examination of the climate information reveals that relative humidity ranges between 68% in January and a peak of 86% in August. Notably, rainfall patterns exhibit a significant monsoonal pattern. Waterloo receives minimal rainfall at the start and end of the year, from 1mm (0.04") to 2mm (0.08") between January and February, and 7mm (0.28") in December, with an extreme augmentation from May to October. In these months, rainfall can reach an astonishing 391mm (15.39") and the area can experience rainfall as much as 30.3 days per month.
Sunshine hours and daylight hours display modest fluctuation throughout the year, from a minimum of 11.6 daylight hours and 4.8 sunshine hours to maximums of 12.6 daylight hours and 9.9 sunshine hours. An interesting weather pattern emerges in terms of cloud cover, which appears to mirror the rainfall cycle. A low of 11% cloud coverage increases substantially to 67% during high rainfall months.
The wind speed varies throughout the year, with the maximum gust measured at 18.4km/h (11.4mph), mostly occurring in the peak rainy season. It's associated with increased moisture levels and reduced visibility of 9km (5.6mi) from July to September when trade winds intensify.
The best time to visit Waterloo
With a detailed understanding of Waterloo's climate, potential visitors can make an informed decision about when to travel. The period from December to April offers a more favorable weather condition as these months record minimal rainfall varying between 1mm (0.04") and 18mm (0.71"). These months experience relatively low humidity levels, between 68% and 74%, making it comfortable for outdoor activities. During this period, visitors enjoy longer sunshine hours, ranging from 9.5 hours to 9.9 hours, and enhanced visibility up to 10km (6.2mi).
The worst time to visit Waterloo
In terms of unfavorable conditions, the months of June to September make up the height of the monsoon season, with close to constant rainfall and limited sunlight. The rainfall in these months ranges from 199mm (7.83") to 391mm (15.39"), and the city experiences only 4.8 hours to 6.6 hours of sunshine per day. Moreover, the humidity levels rise above 82%, which when coupled with high temperatures, might make this period uncomfortable for visitors not accustomed to such conditions.
Spring weather in Waterloo
Waterloo's tropical monsoon climate doesn't allow for a conventional spring season. However, in the March-April period—which would correspond to spring in a temperate zone—the city witnesses an upswing in the weather conditions. Temperatures range from 24.6°C (76.3°F) to 30.8°C (87.4°F). Rainfall begins to increase from 1mm (0.04") in February to 6mm (0.24") in March and further to 18mm (0.71") in April. Relative humidity also escalates, peaking at 74% in April.
Summer weather in Waterloo
Given Waterloo's equatorial positioning, it doesn't experience traditional summer months. However, for comparative purposes, the period of May to August would be the closest to a summer season. This period is marked by intense rainfall, with a peak of 391mm (15.39") in August. Temperatures range from 27.3°C (81.1°F) to 30.7°C (87.3°F) during these months, and relative humidity is above 78%.
Autumn weather in Waterloo
Similarly, Waterloo does not experience a distinct autumn season. However, the transition phase from the monsoon to the drier months, September to November, can be compared to autumn. September experiences the highest rainfall of 220mm (8.66") but it continuously decreases to 59mm (2.32") by November. Temperatures remain comparatively steady, between 28.1°C (82.6°F) and 30.1°C (86.2°F).
Winter weather in Waterloo
Waterloo’s geographical location near the equator means there is no identifiable winter season. However, the relatively cooler and drier phase from December to February can be compared to winter. Average temperatures are from 24.1°C (75.4°F) to 31.4°C (88.5°F). The city receives minimal rainfall dampening only 1 to 2 days per month, and relative humidity drops to a year-round low of 68% in January.
Weather in January
January in Waterloo, Sierra Leone, welcomes the New Year with one of the lowest levels of rainfall, measuring a mere 2mm (0.08"). Enjoy the outdoors as days are filled with ample sunshine, lasting 9.8 hours, and relatively low cloud coverage. Weather in January »
Weather in February
February marks a transition in Waterloo's climatic pattern. A comparison with January shows a dip in rainfall and an increase in temperature; however, this is not significant. Moderate wind speeds continue to contribute to refreshing weather, allowing enjoyable outdoor activities. Weather in February »
Weather in March
Waterloo's weather in March shifts considerably, reflecting the onset of a wet period. There is a noteworthy leap from 1mm (0.04") of rainfall in February to 6mm (0.24"). While daytime temperatures fluctuate slightly, nights become a bit cooler. Weather in March »
Weather in April
In Waterloo, April brings about a considerable transition from the rather dry first quarter, with rainfall reaching 18mm (0.71"). The increment in rainfall and relative humidity introduces a slightly muggy environment. Consistent cloud coverage ensures diffused daylight, influencing the outdoor temperatures. Weather in April »
Weather in May
Waterloo weather takes a turn in May, displaying a dramatic increase in rainfall levels, soaring up to 66mm (2.6"), creating a remarkably wet environment. Encouragingly, the increased moisture doesn't much affect the daylight hours, allowing ample time for outdoors before sundown. Weather in May »
Weather in June
Weather variations continue in June, with Waterloo experiencing its peak rainfall of 199mm (7.83"). The atmosphere becomes distinctly damp, owing to maximum relative humidity. There's a notable dip in sunshine hours; however, daylight remains almost unchanged. Weather in June »
Weather in July
July witnesses the highest rainfall of the year in Waterloo, with downpours reaching a significant 387mm (15.24"). This heavy rainfall takes place amidst falling temperatures, creating a cooler, damp environment. Despite this peak in rainfall, wind speeds remain relatively calm. Weather in July »
Weather in August
Entering August, Waterloo sees a slight decrement in rainfall, dropping to 391mm (15.39"), yet it remains one of the wettest months. The city experiences the year's highest relative humidity, making the atmosphere feel markedly humid. Weather in August »
Weather in September
In contrast to the preceding months, September brings a significant reduction in rainfall to Waterloo, measuring 220mm (8.66"). The weather begins to clear, with the number of sunshine hours beginning to rise while maintaining a steady daylight time. Weather in September »
Weather in October
October in Waterloo marks a further decline in rainfall, hitting 151mm (5.94"), setting a clear departure from the preceding wet months. Lower precipitation levels lead to increased sunshine hours, indicating brighter days ahead. Weather in October »
Weather in November
The weather in November portrays a stark departure from the typically wet months, with the rainfall in Waterloo dropping rapidly to 59mm (2.32"). The receding clouds offer more room for sunlight, leading to longer sunshine hours. Weather in November »
Weather in December
Waterloo's weather in December sees the year's lowest rainfall, merely 7mm (0.28"), distinctly contrasting the past high rainfall months. The decrease in cloud coverage allows for more bright, sunny hours despite the slight dip in daylight. Weather in December »
Updated: Jan 26, 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 month is the hottest in Waterloo?
Waterloo's January weather, marked by an average high temperature of 31.4°C (88.5°F) and an average low temperature of 24.1°C (75.4°F), is the warmest in the year.
What is the least humid month in Waterloo?
The least humid month in Waterloo is January, with an average relative humidity of 68%.
How many days does it rain in Waterloo?
Throughout the year, in Waterloo, there are 205.9 rainfall days, and 1507mm (59.33") of precipitation is accumulated.
What is the month with the highest UV index in Waterloo?
January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index.
What is the driest month in Waterloo?
February is the month with the least rainfall in Waterloo, Sierra Leone. Rain falls for 0.8 days and accumulates 1mm (0.04") of precipitation.
What month has the most sunshine in Waterloo?
The month with the most sunshine in Waterloo, Sierra Leone, is February, with an average of 9.9h of sunshine.
When are the longest days in Waterloo?
The month with the longest days is June, with an average of 12h and 36min of daylight.
What are the months with the lowest UV index in Waterloo?
July and August, with an average maximum UV index of 6, are months with the lowest UV index.
What is the coldest time of year in Waterloo?
August, with average temperatures reaching a high of 27.3°C (81.1°F) and a low of 23.9°C (75°F), is the coldest month in Waterloo, Sierra Leone.
What is the most humid month in Waterloo?
August is the most humid month in Waterloo, with an average relative humidity of 86%.
What is the rainiest month in Waterloo?
The month with the most rainfall in Waterloo is August, when the rain falls for 30.2 days and typically aggregates up to 391mm (15.39") of precipitation.
What is the month with the least sunshine in Waterloo?
With an average of 4.8h of sunshine, August has the least sunshine of the year in Waterloo, Sierra Leone.
What is the month with the shortest days in Waterloo?
With an average of 11h and 42min of daylight, December has the shortest days of the year in Waterloo, Sierra Leone.
Is there Daylight Saving Time (DST) in Waterloo?
Waterloo does not utilize Daylight Saving Time (DST). GMT timezone is used over the entire year.
Average temperature
Waterloo, Sierra Leone
The warmest month (with the highest average high temperature) is January (31.4°C).
The month with the lowest average high temperature is August (27.3°C).
The month with the highest average low temperature is May (26.2°C).
The coldest month (with the lowest average low temperature) is August (23.9°C).
Average pressure
Waterloo, Sierra Leone
- Average pressure in January:
1011.2mbar - Average pressure in February:
1010.4mbar - Average pressure in March:
1010.4mbar - Average pressure in April:
1010.5mbar - Average pressure in May:
1011.6mbar - Average pressure in June:
1013.3mbar
- Average pressure in July:
1013.8mbar - Average pressure in August:
1013.4mbar - Average pressure in September:
1012.8mbar - Average pressure in October:
1011.6mbar - Average pressure in November:
1010.9mbar - Average pressure in December:
1011.1mbar
The month with the highest atmospheric pressure is July (1013.8mbar).
The months with the lowest atmospheric pressure are February and March (1010.4mbar).
Average wind speed
Waterloo, Sierra Leone
- Average wind speed in January:
9.3km/h - Average wind speed in February:
10.7km/h - Average wind speed in March:
11.6km/h - Average wind speed in April:
11.6km/h - Average wind speed in May:
10.4km/h - Average wind speed in June:
9.7km/h
- Average wind speed in July:
11.3km/h - Average wind speed in August:
12km/h - Average wind speed in September:
9.5km/h - Average wind speed in October:
7.6km/h - Average wind speed in November:
6.8km/h - Average wind speed in December:
7.6km/h
The windiest month (with the highest average wind speed) is August (12km/h).
The calmest month (with the lowest average wind speed) is November (6.8km/h).
Average humidity
Waterloo, Sierra Leone
The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is January (68%).
Average rainfall
Waterloo, Sierra Leone
The wettest month (with the highest rainfall) is August (391mm).
The driest month (with the least rainfall) is February (1mm).
Average rainfall days
Waterloo, Sierra Leone
- Average rainfall days in January:
1.4 days - Average rainfall days in February:
0.8 days - Average rainfall days in March:
5.8 days - Average rainfall days in April:
9.7 days - Average rainfall days in May:
19.6 days - Average rainfall days in June:
27.3 days
- Average rainfall days in July:
30.3 days - Average rainfall days in August:
30.2 days - Average rainfall days in September:
28.6 days - Average rainfall days in October:
27.9 days - Average rainfall days in November:
20.3 days - Average rainfall days in December:
4 days
The month with the highest number of rainy days is July (30.3 days).
The month with the least rainy days is February (0.8 days).
Average daylight / Average sunshine
Waterloo, Sierra Leone
- 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 4min
- Average daylight in July:
12h and 4min - Average daylight in August:
12h and 2min - Average daylight in September:
12h and 1min - Average daylight in October:
11h and 5min - Average daylight in November:
11h and 4min - Average daylight in December:
11h and 4min
The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in January:
9h and 5min - Average sunshine in February:
9h and 5min - Average sunshine in March:
9h and 4min - Average sunshine in April:
9h and 3min - Average sunshine in May:
8h and 2min - Average sunshine in June:
6h and 4min
- Average sunshine in July:
5h and 3min - Average sunshine in August:
4h and 5min - Average sunshine in September:
6h and 4min - Average sunshine in October:
8h and 0min - Average sunshine in November:
9h and 1min - Average sunshine in December:
9h and 4min
The month with the most sunshine is February (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 4h and 48min).
Average sunshine days
Waterloo, Sierra Leone
- Average sunshine days in January:
29 days - Average sunshine days in February:
27.2 days - Average sunshine days in March:
24.6 days - Average sunshine days in April:
18.6 days - Average sunshine days in May:
8.8 days - Average sunshine days in June:
1.5 days
- Average sunshine days in July:
0.6 days - Average sunshine days in August:
0.5 days - Average sunshine days in September:
0.8 days - Average sunshine days in October:
2.3 days - Average sunshine days in November:
7.5 days - Average sunshine days in December:
25.5 days
The month with the most sunshine days is January (29 days).
The month with the least sunshine days is August (0.5 days).
Average UV index
Waterloo, Sierra Leone
The months with the highest UV index are January, February, March, April, May, June, September, October, November and December (UV index 7).
The months with the lowest UV index are July and August (UV index 6).
Average cloud cover
Waterloo, Sierra Leone
The month with the most cloud cover is August (Cloud cover 67).
The month with the least cloud cover is February (Cloud cover 11).
Average visibility
Waterloo, Sierra Leone
The months with the highest visibility are January, February, March, April, May, June, October, November and December (10km).
The months with the lowest visibility are July, August and September (9km).
Waterloo, Sierra Leone
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