July Weather in Naperville, United States

Last updated: June 24, 2025

In Naperville, United States, the average temperature in July hovers around 24°C (76°F). Expect a minimum of 13°C (55°F) and a maximum of 34°C (94°F) during this time. With 119 mm (4.7 in) of precipitation over 12 days, be prepared for the possibility of rain. Additionally, the air carries an average humidity of 80%, adding to the overall tropical feel of the season.

July Temperature in Naperville

In July in Naperville, the average temperature is 24°C (76°F). Maximum temperatures can reach up to 34°C (94°F), while the minimum can drop as low as 13°C (55°F). This range of temperatures makes Naperville an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates July temperature patterns in Naperville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Naperville, July typically has an average temperature of 24°C (76°F), with highs reaching up to 34°C (94°F) and lows dropping to around 13°C (55°F).

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

July Precipitation in Naperville

In Naperville in July, the total precipitation amount is 119 mm (4.7 in), falling over a span of 12 days.

July Precipitation Trends in Naperville

The chart displays monthly precipitation patterns in Naperville, 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 Naperville, July typically receives around 119 mm (4.7 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 Naperville

In Naperville in July humidity is 80%. With an average temperature of 24°C (76°F), this humidity feels like a warm, sticky embrace that can make exploring outdoors quite draining, so it's essential to stay hydrated and take breaks in the shade while traveling.

July Average Humidity in Naperville

This chart illustrates the average monthly humidity levels in Naperville, 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 Naperville is approximately 80%, 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 Naperville

In Naperville 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 Naperville.

Maximum UV Index Levels in Naperville for July

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

Data source: Naperville 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 Naperville Compares to Other Months

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

This table compares monthly weather conditions in Naperville, 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 (26°F)	62 mm (2.5 inches)	82%	moderate
February Weather	-3°C (28°F)	63 mm (2.5 inches)	83%	moderate
March Weather	4°C (40°F)	87 mm (3.4 inches)	84%	high
April Weather	9°C (49°F)	117 mm (4.6 inches)	85%	very high
May Weather	16°C (61°F)	157 mm (6.2 inches)	79%	very high
June Weather	22°C (72°F)	152 mm (6.0 inches)	82%	very high
July Weather	24°C (76°F)	119 mm (4.7 inches)	80%	very high
August Weather	23°C (73°F)	91 mm (3.6 inches)	81%	very high
September Weather	20°C (68°F)	95 mm (3.8 inches)	80%	very high
October Weather	12°C (54°F)	129 mm (5.1 inches)	82%	high
November Weather	4°C (39°F)	57 mm (2.3 inches)	88%	moderate
December Weather	0°C (33°F)	53 mm (2.1 inches)	84%	low