July Weather in Collinsville, United States

Last updated: June 24, 2025

In July, the average temperature in Collinsville, United States reaches a warm 27°C (81°F). The temperatures can fluctuate, with a minimum of 19°C (66°F) and a maximum soaring to 37°C (99°F). Prepare for a wet month as you might experience 117 mm (4.6 in) of precipitation over 18 days, with humidity levels averaging around 82%.

July Temperature in Collinsville

In July in Collinsville, the average temperature is 27°C (81°F). Maximums can reach 37°C (99°F), and minimums can be as low as 19°C (66°F). This makes it an ideal month for travelers who enjoy warm weather and outdoor activities.

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

The chart illustrates July 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, July typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 19°C (66°F).

Data source: Temperature data for Collinsville generated using information from the Copernicus Climate Change Service.

July Precipitation in Collinsville

In Collinsville in July, the precipitation amount is 117 mm (4.6 in) over a period of 18 days.

July Precipitation Trends in Collinsville

The chart displays monthly precipitation patterns in Collinsville, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Collinsville, July typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 18 days.

Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Collinsville

In Collinsville in July humidity is 82%. With an average temperature of 27°C (81°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel more exhausting, and leaving you longing for the relief of air-conditioned spaces during your travels.

July Average Humidity in Collinsville

This chart illustrates the average monthly humidity levels in Collinsville, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Collinsville is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Collinsville

In Collinsville in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Collinsville.

Maximum UV Index Levels in Collinsville for July

The chart shows the monthly maximum UV Index (UVI) for Collinsville in July, 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 July, the maximum UV index in Collinsville typically reaches 11, which falls under the extreme exposure category.

Data source: Collinsville July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	104 mm (4.1 inches)	85%	moderate
February Weather	12°C (54°F)	148 mm (5.8 inches)	84%	high
March Weather	16°C (60°F)	117 mm (4.6 inches)	82%	very high
April Weather	18°C (65°F)	133 mm (5.3 inches)	82%	extreme
May Weather	23°C (74°F)	114 mm (4.5 inches)	82%	extreme
June Weather	26°C (79°F)	167 mm (6.6 inches)	79%	extreme
July Weather	27°C (81°F)	117 mm (4.6 inches)	82%	extreme
August Weather	27°C (81°F)	128 mm (5.1 inches)	77%	extreme
September Weather	25°C (78°F)	98 mm (3.8 inches)	74%	very high
October Weather	20°C (69°F)	107 mm (4.2 inches)	73%	very high
November Weather	13°C (55°F)	68 mm (2.7 inches)	85%	high
December Weather	11°C (52°F)	123 mm (4.8 inches)	88%	moderate