July Weather in Mattoon, United States

Last updated: June 24, 2025

In July, the average temperature in Mattoon, United States hovers around 25°C (78°F), providing a pleasant climate for outdoor activities. However, be prepared for a minimum of 13°C (55°F) on cooler days and occasional peaks of up to 35°C (95°F). With 116 mm (4.6 in) of precipitation spread over 11 days, it's wise to pack an umbrella. The average humidity sits at a muggy 82%, adding to the tropical feel of the region.

July Temperature in Mattoon

In July in Mattoon, the average temperature is 25°C (78°F). Maximums can reach 35°C (95°F), while minimums can drop to as low as 13°C (55°F). This weather makes it an ideal time for travelers to explore outdoor activities while also being prepared for occasional cooler evenings.

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

The chart illustrates July temperature patterns in Mattoon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mattoon, July typically has an average temperature of 25°C (78°F), with highs reaching up to 35°C (95°F) and lows dropping to around 13°C (55°F).

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

July Precipitation in Mattoon

In Mattoon in July, the precipitation amount is 116 mm (4.6 in) over the course of 11 days.

July Precipitation Trends in Mattoon

The chart displays monthly precipitation patterns in Mattoon, 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 Mattoon, July typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 11 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 Mattoon

In Mattoon in July, humidity is 82%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities a bit more challenging and encouraging you to seek shade or a cool spot during your travels.

July Average Humidity in Mattoon

This chart illustrates the average monthly humidity levels in Mattoon, 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 Mattoon 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 Mattoon

In Mattoon 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 Mattoon.

Maximum UV Index Levels in Mattoon for July

The chart shows the monthly maximum UV Index (UVI) for Mattoon 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 Mattoon typically reaches 10, which falls under the very high exposure category.

Data source: Mattoon 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 Mattoon Compares to Other Months

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

This table compares monthly weather conditions in Mattoon, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	78 mm (3.1 inches)	84%	moderate
February Weather	1°C (33°F)	79 mm (3.1 inches)	82%	moderate
March Weather	7°C (44°F)	125 mm (4.9 inches)	84%	high
April Weather	12°C (53°F)	117 mm (4.6 inches)	83%	very high
May Weather	19°C (66°F)	135 mm (5.3 inches)	80%	very high
June Weather	24°C (76°F)	110 mm (4.3 inches)	83%	extreme
July Weather	25°C (78°F)	116 mm (4.6 inches)	82%	very high
August Weather	24°C (75°F)	123 mm (4.8 inches)	82%	very high
September Weather	21°C (71°F)	67 mm (2.6 inches)	79%	very high
October Weather	14°C (58°F)	115 mm (4.5 inches)	79%	high
November Weather	6°C (42°F)	89 mm (3.5 inches)	88%	moderate
December Weather	3°C (37°F)	65 mm (2.6 inches)	87%	moderate