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May Weather in Waterloo, Sierra Leone

Last updated: August 31, 2025

In Waterloo, Sierra Leone, the average temperature in May is a warm 27°C (81°F). Expect minimums of about 23°C (74°F) and pleasant highs reaching 31°C (89°F). However, with 198 mm (7.8 in) of precipitation spread over 24 days, bringing an average humidity of 80%, make sure to pack your umbrella along with your summer attire!

May Temperature in Waterloo

In May in Waterloo, the average temperature is 27°C (81°F). Maximums can reach 31°C (89°F), while minimums can drop to as low as 23°C (74°F). This mild and warm climate makes Waterloo an ideal destination for travelers seeking pleasant weather during this time of year.

May Weather in Waterloo: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Waterloo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterloo, May typically has an average temperature of 27°C (81°F), with highs reaching up to 31°C (89°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec818181828179777778798081
Data source: Temperature data for Waterloo generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Waterloo

In Waterloo in May, the precipitation amount is 198 mm (7.8 in) over the course of 24 days.

May Precipitation Trends in Waterloo

The chart displays monthly precipitation patterns in Waterloo, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Waterloo, May typically receives around 198 mm (7.8 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec1116256219849177772459627014546
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Waterloo

In Waterloo in May humidity is 80%. With an average temperature of 27°C (81°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making travel tiring as sweat beads form quickly and the air feels thick and heavy.

May Average Humidity in Waterloo

This chart illustrates the average monthly humidity levels in Waterloo, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Waterloo is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%72%73%78%80%84%84%90%89%86%79%70%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Waterloo

In Waterloo in May, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Waterloo.

Maximum UV Index Levels in Waterloo for May

The chart shows the monthly maximum UV Index (UVI) for Waterloo in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Waterloo typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10111112131213131312109
Data source: Waterloo May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How May Weather in Waterloo Compares to Other Months

Weather in Waterloo varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Waterloo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Waterloo, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)11 mm (0.4 inches)65%very high
February Weather27°C (81°F)16 mm (0.6 inches)72%extreme
March Weather27°C (82°F)25 mm (1.0 inches)73%extreme
April Weather28°C (82°F)62 mm (2.5 inches)78%extreme
May Weather27°C (81°F)198 mm (7.8 inches)80%extreme
June Weather26°C (79°F)491 mm (19.3 inches)84%extreme
July Weather25°C (78°F)777 mm (30.6 inches)84%extreme
August Weather25°C (78°F)724 mm (28.5 inches)90%extreme
September Weather26°C (78°F)596 mm (23.5 inches)89%extreme
October Weather26°C (79°F)270 mm (10.6 inches)86%extreme
November Weather27°C (80°F)145 mm (5.7 inches)79%very high
December Weather27°C (81°F)46 mm (1.8 inches)70%very high

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