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September Weather in Byumba, Rwanda

Last updated: August 31, 2025

In September, the average temperature in Byumba, Rwanda hovers around 19°C (66°F), while it can dip to a chilly 12°C (55°F) at night and reach a warm 26°C (80°F) during the day. Expect about 116 mm (4.6 in) of precipitation spread over 17 days, contributing to an average humidity of 82%. Prepare for a mix of comfort and moisture as you experience this vibrant period!

September Temperature in Byumba

In September in Byumba, the average temperature is 19°C (66°F). Maximums can reach 26°C (80°F), and minimums can be as low as 12°C (55°F). This pleasant climate makes it an ideal destination for outdoor activities and exploration during your travels.

September Weather in Byumba: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Byumba, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Byumba, September typically has an average temperature of 19°C (66°F), with highs reaching up to 26°C (80°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec666665656566666666656565
Data source: Temperature data for Byumba 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.

September Precipitation in Byumba

In Byumba in September, the precipitation amount is 116 mm (4.6 in) spread over 17 days.

September Precipitation Trends in Byumba

The chart displays monthly precipitation patterns in Byumba, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Byumba, September typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec113146211241146281371116169168178
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Byumba

In Byumba in September humidity is 82%. With an average temperature of 19°C (66°F), this humidity feels like a warm blanket wrapping around you, making it slightly uncomfortable for traveling as you might find yourself constantly seeking shade or a cool breeze.

September Average Humidity in Byumba

This chart illustrates the average monthly humidity levels in Byumba, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Byumba is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%75%80%88%83%79%79%82%89%93%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Byumba

In Byumba in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Byumba, you can check here.

Maximum UV Index Levels in Byumba for September

The chart shows the monthly maximum UV Index (UVI) for Byumba in September, 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 September, the maximum UV index in Byumba typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151617161412121314141313
Data source: Byumba September 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 September Weather in Byumba Compares to Other Months

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

This table compares monthly weather conditions in Byumba, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (66°F)113 mm (4.5 inches)81%extreme
February Weather19°C (66°F)146 mm (5.7 inches)80%extreme
March Weather18°C (65°F)211 mm (8.3 inches)75%extreme
April Weather18°C (65°F)241 mm (9.5 inches)80%extreme
May Weather18°C (65°F)146 mm (5.7 inches)88%extreme
June Weather19°C (66°F)28 mm (1.1 inches)83%extreme
July Weather19°C (66°F)13 mm (0.5 inches)79%extreme
August Weather19°C (67°F)71 mm (2.8 inches)79%extreme
September Weather19°C (66°F)116 mm (4.6 inches)82%extreme
October Weather18°C (65°F)169 mm (6.7 inches)89%extreme
November Weather18°C (65°F)168 mm (6.6 inches)93%extreme
December Weather18°C (65°F)178 mm (7.0 inches)89%extreme

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