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May Weather in Belleville, United States

Last updated: June 24, 2025

In Belleville, United States, the average temperature in May hovers around 18°C (64°F). However, it can vary significantly, with minimums dipping to 2°C (36°F) and maximums soaring up to 37°C (98°F). Be prepared for 179 mm (7.0 in) of precipitation over approximately 14 days, and expect the air to be quite humid, with an average humidity level of 82%.

May Temperature in Belleville

In May in Belleville, the average temperature is 18°C (64°F). The maximum can reach 37°C (98°F), while the minimum can drop to as low as 2°C (36°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates May 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, May typically has an average temperature of 18°C (64°F), with highs reaching up to 37°C (98°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec293044536477807772544335
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.

May Precipitation in Belleville

In Belleville in May, the total precipitation amount is 179 mm (7.0 in) spread over a period of 14 days.

May Precipitation Trends in Belleville

The chart displays monthly precipitation patterns in Belleville, 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 Belleville, May typically receives around 179 mm (7.0 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec2523804917972799560892337
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Belleville

In Belleville in May humidity is 82%. With an average temperature of 18°C (64°F), this humidity feels like a warm, muggy embrace that can make exploring the area feel stifling, leaving travelers drenched in sweat and longing for respite in the shade.

May Average Humidity in Belleville

This chart illustrates the average monthly humidity levels in Belleville, 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 Belleville is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%78%67%70%82%81%80%80%74%71%79%83%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Belleville

In Belleville in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Belleville.

Maximum UV Index Levels in Belleville for May

The chart shows the monthly maximum UV Index (UVI) for Belleville 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 Belleville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Belleville 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 Belleville Compares to Other Months

Weather in Belleville varies notably across the year, with each month offering distinct climate conditions. This page compares May’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 May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (30°F)25 mm (1.0 inches)74%moderate
February Weather-1°C (30°F)23 mm (0.9 inches)78%moderate
March Weather7°C (44°F)80 mm (3.2 inches)67%high
April Weather11°C (53°F)49 mm (1.9 inches)70%very high
May Weather18°C (64°F)179 mm (7.0 inches)82%very high
June Weather25°C (78°F)72 mm (2.8 inches)81%extreme
July Weather27°C (81°F)79 mm (3.1 inches)80%extreme
August Weather25°C (77°F)95 mm (3.7 inches)80%very high
September Weather22°C (72°F)59 mm (2.3 inches)73%very high
October Weather12°C (55°F)88 mm (3.5 inches)71%high
November Weather6°C (43°F)23 mm (0.9 inches)79%moderate
December Weather1°C (35°F)37 mm (1.4 inches)83%moderate

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