May weather forecast
Illinois, USA

May solidifies the presence of spring in Illinois, offering warmer temperatures and blossoming landscapes. The northern sections, especially those adjoining Wisconsin, experience daytime temperatures that frequently reside in the upper 60s°F to low 70s°F. Meanwhile, the southern regions, near Kentucky, can see temperatures soaring to the mid-70s°F (around 75.2°F (24°C)).

The metropolis of Chicago embraces May with a renewed vigor. The breezes off Lake Michigan provide a cooling effect, especially in areas closer to the shoreline. Rain showers are common, but they are interspersed with sunny intervals, providing a vibrant ambiance to the city's streets and parks.

Nighttime temperatures in May are comfortably cool, typically ranging from the upper 40s°F to mid-50s°F across the state. The chill of previous months is now a distant memory, and the state adorns a verdant blanket with blooming flowers and bustling wildlife.

In comparison to April, May displays a warmer and more settled climate. The increase in daylight and the waning frequency of cold fronts solidify the departure of spring's early volatility. As May draws to a close, it sets the stage for the imminent warmth and vigor of June's summer onset.

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• Chicago - May »
  Throughout the year, in Chicago there are 40.9 snowfall days, and 13.9" (353mm) of snow is accumulated. In Chicago, Illinois, in May, it is raining for 18.3 days, with typically 4.61" (117mm) of accumulated precipitation.
• Aurora - May »
  The month with the most rainfall in Aurora is May, when the rain falls for 14.7 days and typically aggregates up to 1.97" (50mm) of precipitation. In Aurora, Illinois, during May, the rain falls for 14.7 days and regularly aggregates up to 1.97" (50mm) of precipitation.
• Rockford - May »
  Throughout the year, in Rockford, Illinois, there are 148.1 rainfall days, and 28.39" (721mm) of precipitation is accumulated. In Rockford in May, during 19 rainfall days, 3.86" (98mm) of precipitation is typically accumulated.
• Joliet - May »
  The month with the most rainfall in Joliet is May, when the rain falls for 17.8 days and typically aggregates up to 4.41" (112mm) of precipitation. May in Joliet welcomes warmer weather and the onset of the city's rainiest month with 4.41" (112mm) of rainfall recorded.
• Naperville - May »
  In Naperville, during May, the rain falls for 14.8 days and regularly aggregates up to 2.09" (53mm) of precipitation. Entering May, Naperville sees a temperature rise, with the average high-temperature advancing from April's moderate 56.8°F (13.8°C) to a pleasant 69.1°F (20.6°C).
• Springfield - May »
  In Springfield in May, during 17.1 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Springfield, during the entire year, the rain falls for 140.2 days and collects up to 23.27" (591mm) of precipitation.
• Peoria - May »
  On the first day of May in Peoria, sunrise is at 5:55 am and sunset at 7:54 pm. On the first day of May in Peoria, sunrise is at 5:55 am and sunset at 7:54 pm.
• Elgin - May »
  On the last day of the month, in Elgin sunrise is at 5:19 am and sunset at 8:21 pm CDT. In Elgin, during May, the rain falls for 17.4 days and regularly aggregates up to 2.95" (75mm) of precipitation.
• Waukegan - May »
  On the last day of the month, in Waukegan, Illinois, sunrise is at 5:17 am and sunset at 8:21 pm CDT. In Waukegan, Illinois, in May, it is raining for 16 days, with typically 2.48" (63mm) of accumulated precipitation.
• Champaign - May »
  On the last day of the month, in Champaign, sunrise is at 5:25 am and sunset at 8:15 pm CDT. In Champaign, during the entire year, the rain falls for 129.9 days and collects up to 18.15" (461mm) of precipitation.
• Cicero - May »
  The month with the most rainfall in Cicero is May, when the rain falls for 14.4 days and typically aggregates up to 1.69" (43mm) of precipitation. In Cicero during May, the rain falls for 14.4 days and regularly aggregates up to 1.69" (43mm) of precipitation.
• Bloomington - May »
  On the last day of the month, in Bloomington, sunrise is at 5:27 am and sunset at 8:19 pm CDT. In May, in Bloomington, Illinois, the rain falls for 17.5 days.