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May Weather in Collinsville, United States

Last updated: June 24, 2025

In May, the average temperature in Collinsville, United States hovers around 15°C (59°F). However, prepare for a range of 0°C (33°F) to a warm 33°C (92°F). Expect 120 mm (4.7 in) of precipitation spread over 13 days, contributing to an average humidity of 69%. Be ready for a mix of weather this month!

May Temperature in Collinsville

In May in Collinsville, the average temperature is 15°C (59°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as 0°C (33°F). Be prepared for a wide range of temperatures if you're planning to travel during this time!

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

The chart illustrates May temperature patterns in Collinsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Collinsville, May typically has an average temperature of 15°C (59°F), with highs reaching up to 33°C (92°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec293237485968747266554133
Data source: Temperature data for Collinsville 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 Collinsville

In Collinsville in May, the precipitation amount is 120 mm (4.7 in) spread over 13 days.

May Precipitation Trends in Collinsville

The chart displays monthly precipitation patterns in Collinsville, 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 Collinsville, May typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec73939113612010316210712215295123
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Collinsville

In Collinsville in May humidity is 69%. With an average temperature of 15°C (59°F), this humidity feels like a mild blanket wrapping around you, making it slightly uncomfortable for traveling; you'll likely find yourself seeking shade and refreshing drinks to stay cool as you explore.

May Average Humidity in Collinsville

This chart illustrates the average monthly humidity levels in Collinsville, 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 Collinsville is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Collinsville

In Collinsville 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 Collinsville.

Maximum UV Index Levels in Collinsville for May

The chart shows the monthly maximum UV Index (UVI) for Collinsville 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 Collinsville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Collinsville 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 Collinsville Compares to Other Months

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

This table compares monthly weather conditions in Collinsville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)73 mm (2.9 inches)84%moderate
February Weather0°C (32°F)93 mm (3.7 inches)82%moderate
March Weather3°C (38°F)91 mm (3.6 inches)81%high
April Weather9°C (48°F)136 mm (5.3 inches)78%very high
May Weather15°C (59°F)120 mm (4.7 inches)69%very high
June Weather20°C (69°F)103 mm (4.1 inches)69%very high
July Weather23°C (74°F)162 mm (6.4 inches)62%very high
August Weather22°C (73°F)107 mm (4.2 inches)65%very high
September Weather19°C (66°F)122 mm (4.8 inches)68%very high
October Weather13°C (56°F)152 mm (6.0 inches)74%high
November Weather5°C (42°F)95 mm (3.7 inches)82%moderate
December Weather1°C (33°F)123 mm (4.9 inches)80%low

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