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August Weather in Belleville, Canada

Last updated: June 18, 2025

In August, the average temperature in Belleville, Canada is a pleasant 21°C (70°F). You can expect temperatures to range from a cool 8°C (47°F) at night to a warm 33°C (91°F) during the day. With an average humidity of 67%, there’s a moderate level of moisture in the air. However, be prepared for some wet days, as 102 mm (4.0 in) of precipitation can fall over 12 days during the month.

August Temperature in Belleville

In August in Belleville, the average temperature is 21°C (70°F), with maximums reaching up to 33°C (91°F) and minimums dipping as low as 8°C (47°F). This makes it an ideal time for travelers to enjoy a mix of warm days and cooler evenings, perfect for outdoor activities and sightseeing.

August Weather in Belleville: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Belleville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belleville, August typically has an average temperature of 21°C (70°F), with highs reaching up to 33°C (91°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec222432435666727062513728
Data source: Temperature data for Belleville 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.

August Precipitation in Belleville

In Belleville in August, the total precipitation amount is 102 mm (4.0 in), occurring over a span of 12 days.

August Precipitation Trends in Belleville

The chart displays monthly precipitation patterns in Belleville, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Belleville, August typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec697266114959289102791269079
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Belleville

In Belleville in August humidity is 67%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making travel a bit stifling but still enjoyable if you're prepared with light clothing and plenty of water.

August Average Humidity in Belleville

This chart illustrates the average monthly humidity levels in Belleville, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Belleville is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%94%87%82%74%68%67%67%74%83%89%91%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Belleville

In Belleville in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Belleville.

Maximum UV Index Levels in Belleville for August

The chart shows the monthly maximum UV Index (UVI) for Belleville in August, 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 August, the maximum UV index in Belleville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899997532
Data source: Belleville August 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 August Weather in Belleville Compares to Other Months

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

This table compares monthly weather conditions in Belleville, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)69 mm (2.7 inches)93%low
February Weather-5°C (24°F)72 mm (2.8 inches)94%moderate
March Weather0°C (32°F)65 mm (2.6 inches)87%moderate
April Weather6°C (43°F)114 mm (4.5 inches)82%very high
May Weather13°C (56°F)95 mm (3.7 inches)74%very high
June Weather19°C (66°F)92 mm (3.6 inches)68%very high
July Weather22°C (72°F)89 mm (3.5 inches)67%very high
August Weather21°C (70°F)102 mm (4.0 inches)67%very high
September Weather17°C (63°F)79 mm (3.1 inches)74%high
October Weather10°C (51°F)126 mm (5.0 inches)83%moderate
November Weather3°C (37°F)90 mm (3.5 inches)89%moderate
December Weather-2°C (28°F)79 mm (3.1 inches)91%low

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