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. On the last day of the month, in Chicago, sunrise is at 5:18 am and sunset at 8:18 pm CDT.
• 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 during May, the rain falls for 14.7 days and regularly aggregates up to 1.97" (50mm) of precipitation.
• Rockford - May »
  The increase in temperature and consistent rainfall encourages much of Rockford's natural beauty to flourish, making it an ideal time for nature walks and gardening. On the first day of May in Rockford, sunrise is at 5:51 am and sunset at 7:55 pm.
• Joliet - May »
  On the first day of May in Joliet sunrise is at 5:49 am and sunset at 7:49 pm. May in Joliet welcomes warmer weather and the onset of the city's rainiest month with 4.41" (112mm) of rainfall recorded.
• Naperville - May »
  The month with the most rainfall in Naperville is May, when the rain falls for 14.8 days and typically aggregates up to 2.09" (53mm) of precipitation. On the first day of May in Naperville sunrise is at 5:48 am and sunset at 7:50 pm.
• Springfield - May »
  On the last day of the month, in Springfield, sunrise is at 5:32 am and sunset at 8:19 pm CDT. In Springfield, Illinois, in May, it is raining for 17.1 days, with typically 2.68" (68mm) of accumulated precipitation.
• Peoria - May »
  In Peoria, Illinois, during May, the rain falls for 16.8 days and regularly aggregates up to 2.64" (67mm) of precipitation. On the last day of the month, in Peoria, sunrise is at 5:29 am and sunset at 8:22 pm CDT.
• Elgin - May »
  In Elgin during the entire year, snow falls for 47.4 days and aggregates up to 13.07" (332mm) of snow. On the last day of the month, in Elgin, sunrise is at 5:20 am and sunset at 8:21 pm CDT.
• Waukegan - May »
  On the last day of the month, in Waukegan, sunrise is at 5:17 am and sunset at 8:20 pm CDT. In Waukegan, during the entire year, the rain falls for 142.5 days and collects up to 21.5" (546mm) of precipitation.
• Champaign - May »
  In Champaign, in May, during 15.3 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. On the first day of May in Champaign, Illinois, sunrise is at 5:52 am and sunset at 7:47 pm.
• Cicero - May »
  In Cicero, Illinois, in May, during 14.4 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. On the first day of May in Cicero, Illinois, sunrise is at 5:47 am and sunset at 7:49 pm.
• Bloomington - May »
  The month with the most rainfall in Bloomington, Illinois, is May, when the rain falls for 17.5 days and typically aggregates up to 2.99" (76mm) of precipitation. In May, in Bloomington, Illinois, the rain falls for 17.5 days.