nomadseason

August Weather in Collinsville, United States

Last updated: June 24, 2025

The average temperature in Collinsville, United States during August is a warm 27°C (81°F). Expect minimums around 16°C (62°F) and maximums reaching up to 37°C (100°F). Be prepared for approximately 120 mm (4.7 in) of precipitation spread across 11 days, and a humidity level averaging 73%.

August Temperature in Collinsville

In August in Collinsville, the average temperature is 27°C (81°F), with maximums potentially reaching 37°C (100°F) and minimums dropping to as low as 16°C (62°F). This pleasant climate makes it an ideal time for travelers to explore the beauty of Collinsville.

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

The chart illustrates August 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, August typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (100°F) and lows dropping to around 16°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec394153597079828076625044
Data source: Temperature data for Collinsville generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Collinsville

In Collinsville in August, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

August Precipitation Trends in Collinsville

The chart displays monthly precipitation patterns in Collinsville, 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 Collinsville, August typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec776911614819810494121871425150
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in Collinsville

In Collinsville in August, humidity is 73%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel sticky and heavy, while also requiring frequent hydration breaks to stay comfortable during your travels.

August Average Humidity in Collinsville

This chart illustrates the average monthly humidity levels in Collinsville, 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 Collinsville is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%71%74%83%83%81%73%67%72%82%85%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Collinsville

In Collinsville in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Collinsville 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 Collinsville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Collinsville 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 Collinsville Compares to Other Months

Weather in Collinsville varies notably across the year, with each month offering distinct climate conditions. This page compares August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)77 mm (3.0 inches)77%moderate
February Weather5°C (41°F)69 mm (2.7 inches)76%high
March Weather12°C (54°F)116 mm (4.6 inches)71%high
April Weather15°C (60°F)148 mm (5.8 inches)73%very high
May Weather21°C (70°F)198 mm (7.8 inches)83%very high
June Weather26°C (79°F)104 mm (4.1 inches)83%extreme
July Weather28°C (83°F)94 mm (3.7 inches)81%extreme
August Weather27°C (81°F)120 mm (4.7 inches)73%very high
September Weather24°C (76°F)87 mm (3.4 inches)67%very high
October Weather17°C (62°F)141 mm (5.6 inches)72%high
November Weather10°C (50°F)51 mm (2.0 inches)82%moderate
December Weather7°C (44°F)49 mm (1.9 inches)85%moderate

Compare Collinsville's Climate with Cities Worldwide