July Weather in Collinsville, United States

Last updated: June 24, 2025

In Collinsville, United States, the average temperature in July hovers around 26°C (78°F), providing a warm and inviting climate. Expect temperatures to range from a cool 14°C (58°F) to a sizzling 36°C (97°F). During this period, the area experiences precipitation totaling 72 mm (2.8 in) over approximately 12 days, with an average humidity level of 79%. Whether you're exploring the outdoors or enjoying local festivities, be prepared for the delightful warmth and occasional showers!

July Temperature in Collinsville

In July in Collinsville, the average temperature is 26°C (78°F). Maximums can reach 36°C (97°F), while minimums can drop to as low as 14°C (58°F). This makes Collinsville an ideal destination for travelers looking to enjoy warm weather with pleasant, cool evenings.

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 26°C (78°F), with highs reaching up to 36°C (97°F) and lows dropping to around 14°C (58°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 total precipitation amount is 72 mm (2.8 in) over the course of 12 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 72 mm (2.8 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Collinsville

In Collinsville in July, humidity is 79%. With an average temperature of 26°C (78°F), this humidity feels like a tropical blanket enveloping you, making outdoor activities less comfortable for traveling.

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 79%, 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 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 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 10, which falls under the very high 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	4°C (39°F)	75 mm (3.0 inches)	87%	moderate
February Weather	7°C (45°F)	110 mm (4.4 inches)	87%	high
March Weather	10°C (50°F)	74 mm (2.9 inches)	86%	very high
April Weather	15°C (59°F)	141 mm (5.6 inches)	84%	very high
May Weather	19°C (67°F)	141 mm (5.6 inches)	83%	very high
June Weather	23°C (74°F)	98 mm (3.9 inches)	83%	extreme
July Weather	26°C (78°F)	72 mm (2.8 inches)	79%	very high
August Weather	24°C (76°F)	108 mm (4.3 inches)	66%	very high
September Weather	22°C (71°F)	133 mm (5.3 inches)	68%	very high
October Weather	16°C (62°F)	121 mm (4.8 inches)	78%	very high
November Weather	9°C (48°F)	79 mm (3.1 inches)	89%	moderate
December Weather	6°C (43°F)	105 mm (4.2 inches)	86%	moderate