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May Weather in Rockford, United States

Last updated: June 24, 2025

In Rockford, United States, the average temperature in May hovers around 16°C (61°F), offering a mild climate. However, temperatures can dip as low as -1°C (30°F) or soar up to 34°C (93°F). Expect about 156 mm (6.1 in) of precipitation spread over 15 days, coupled with an average humidity of 78%. Prepare accordingly for a varied weather experience!

May Temperature in Rockford

In May in Rockford, the average temperature is 16°C (61°F). Maximum can reach 34°C (93°F) and minimum can be as low as -1°C (30°F). This range makes it essential for travelers to pack accordingly, preparing for both warm days and chilly nights.

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 16°C (61°F), with highs reaching up to 34°C (93°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec232538476072757267533731
Data source: Temperature data for Rockford generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Rockford

In Rockford in May, the total precipitation amount is 156 mm (6.1 in) distributed over 15 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 156 mm (6.1 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec60557010215611174811101124850
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Rockford

In Rockford in May, humidity is 78%. With an average temperature of 16°C (61°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as it clings to your skin and creates a heavy atmosphere that can drain your energy.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098532
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.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)60 mm (2.4 inches)85%moderate
February Weather-4°C (25°F)55 mm (2.2 inches)85%moderate
March Weather3°C (38°F)70 mm (2.8 inches)85%high
April Weather9°C (48°F)102 mm (4.0 inches)85%very high
May Weather16°C (61°F)156 mm (6.1 inches)78%very high
June Weather22°C (72°F)111 mm (4.4 inches)80%very high
July Weather24°C (76°F)74 mm (2.9 inches)78%very high
August Weather22°C (73°F)81 mm (3.2 inches)76%very high
September Weather19°C (67°F)110 mm (4.3 inches)79%very high
October Weather12°C (53°F)112 mm (4.4 inches)83%moderate
November Weather3°C (38°F)48 mm (1.9 inches)88%moderate
December Weather0°C (31°F)50 mm (2.0 inches)81%low

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