April Weather in Joliet, United States

Last updated: June 24, 2025

In April, the average temperature in Joliet, United States hovers around 5°C (42°F), with a minimum plunging to -18°C (0°F) and a maximum soaring to 27°C (80°F). Expect 76 mm (3.0 in) of precipitation spread over 13 days, bringing an average humidity level of 74%. Be prepared for a mix of chilly and mild weather as you explore this unique destination!

April Temperature in Joliet

In April in Joliet, the average temperature is 5°C (42°F). Maximums can reach 27°C (80°F), while minimums can dip as low as -18°C (0°F). Travelers should be prepared for a wide range of temperatures during this time.

April Weather in Joliet: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Joliet, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joliet, April typically has an average temperature of 5°C (42°F), with highs reaching up to 27°C (80°F) and lows dropping to around -18°C (0°F).

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

April Precipitation in Joliet

In Joliet in April, the total precipitation amount is 76 mm (3.0 in), which occurs over the course of 13 days.

April Precipitation Trends in Joliet

The chart displays monthly precipitation patterns in Joliet, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Joliet, April typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Joliet

In Joliet in April, humidity is 74%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that penetrates your clothes, making outdoor activities somewhat uncomfortable and necessitating extra layers to keep warm while exploring.

April Average Humidity in Joliet

This chart illustrates the average monthly humidity levels in Joliet, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Joliet is approximately 74%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Joliet

In Joliet in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Joliet.

Maximum UV Index Levels in Joliet for April

The chart shows the monthly maximum UV Index (UVI) for Joliet in April, 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 April, the maximum UV index in Joliet typically reaches 8, which falls under the very high exposure category.

Data source: Joliet April 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 April Weather in Joliet Compares to Other Months

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

This table compares monthly weather conditions in Joliet, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	21 mm (0.8 inches)	85%	moderate
February Weather	-7°C (20°F)	46 mm (1.8 inches)	85%	moderate
March Weather	2°C (35°F)	44 mm (1.7 inches)	79%	high
April Weather	5°C (42°F)	76 mm (3.0 inches)	74%	very high
May Weather	12°C (53°F)	82 mm (3.2 inches)	76%	very high
June Weather	18°C (64°F)	76 mm (3.0 inches)	79%	extreme
July Weather	22°C (72°F)	32 mm (1.3 inches)	81%	very high
August Weather	21°C (69°F)	25 mm (1.0 inches)	80%	very high
September Weather	15°C (60°F)	57 mm (2.2 inches)	76%	very high
October Weather	6°C (43°F)	57 mm (2.2 inches)	74%	moderate
November Weather	1°C (35°F)	34 mm (1.3 inches)	81%	moderate
December Weather	-3°C (28°F)	30 mm (1.2 inches)	87%	low