May Weather in Rockford, United States

Last updated: June 24, 2025

In May, the average temperature in Rockford, United States hovers around 22°C (73°F), making it a pleasant time of year. However, be prepared for a range, with minimums dipping to 7°C (45°F) and maximums soaring to 34°C (94°F). Expect 126 mm (5.0 in) of precipitation spread over 11 days, accompanied by an average humidity of 81%—ideal for those who enjoy a bit of moisture in the air!

May Temperature in Rockford

In May in Rockford, the average temperature is 22°C (73°F). Maximums can reach 34°C (94°F), and minimums can be as low as 7°C (45°F). Prepare for a pleasantly warm climate, ideal for sightseeing and outdoor adventures.

May Weather in Rockford: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Rockford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rockford, May typically has an average temperature of 22°C (73°F), with highs reaching up to 34°C (94°F) and lows dropping to around 7°C (45°F).

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

May Precipitation in Rockford

In Rockford in May, the total precipitation amount is 126 mm (5.0 in) spread over 11 days.

May Precipitation Trends in Rockford

The chart displays monthly precipitation patterns in Rockford, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Rockford, May typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Rockford

In Rockford in May, humidity is 81%. With an average temperature of 22°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor activities a bit more challenging but also invigorating, as you experience the vibrant atmosphere of the surroundings.

May Average Humidity in Rockford

This chart illustrates the average monthly humidity levels in Rockford, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Rockford is approximately 81%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Rockford

In Rockford in May, 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 Rockford.

Maximum UV Index Levels in Rockford for May

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

Data source: Rockford May 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 May Weather in Rockford Compares to Other Months

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

This table compares monthly weather conditions in Rockford, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	113 mm (4.5 inches)	85%	moderate
February Weather	12°C (54°F)	156 mm (6.1 inches)	84%	high
March Weather	15°C (59°F)	129 mm (5.1 inches)	82%	very high
April Weather	18°C (64°F)	142 mm (5.6 inches)	82%	very high
May Weather	22°C (73°F)	126 mm (5.0 inches)	81%	extreme
June Weather	25°C (78°F)	150 mm (5.9 inches)	77%	extreme
July Weather	27°C (81°F)	110 mm (4.3 inches)	77%	extreme
August Weather	27°C (80°F)	120 mm (4.7 inches)	72%	extreme
September Weather	25°C (77°F)	88 mm (3.5 inches)	73%	very high
October Weather	20°C (69°F)	119 mm (4.7 inches)	73%	high
November Weather	12°C (55°F)	83 mm (3.3 inches)	85%	high
December Weather	10°C (51°F)	140 mm (5.5 inches)	88%	moderate