Illinois weather in May
Considering a trip to Illinois this May and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:
What is the weather like in Illinois in May?
Illinois is a region in the United States of America. May in Illinois generally has temperatures that range from pleasant to warm, with precipitation levels ranging from moderate to high.
The average maximum daytime temperatures vary from pleasant in Zion at 18°C to warm in Metropolis at 25°C. Nighttime temperatures generally drop to 14°C in Metropolis and 9°C in Zion.
In May, precipitation varies across different areas. From moderate rainfall in Freeport with an average of 90 mm to high rainfall in Sparta with 148 mm. Meanwhile, Chicago enjoys close to 282 hours of sunlight. This means it's a great month if you prefer bright and sunny days.
For a closer look at May's conditions in Illinois, see the map below. For a more detailed look at Illinois's yearly weather, check out our Illinois climate page.
Where to go in Illinois in May
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Popular destinations in Illinois
What is the weather like in May for the 5 most popular destinations in Illinois?
Average weather in Chicago
In May Chicago generally has pleasant temperatures with maximum daytime temperatures around 21°C, minimum nighttime temperatures around 11°C and high monthly rainfall. So on average the conditions are pleasant that month.
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Average weather in Schaumburg
In May Schaumburg generally has pleasant temperatures with maximum daytime temperatures around 22°C, minimum nighttime temperatures around 9°C and high monthly rainfall. So on average the conditions are pleasant that month.
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Average weather in Rosemont
In May Rosemont generally has pleasant temperatures with maximum daytime temperatures around 21°C, minimum nighttime temperatures around 11°C and high monthly rainfall. So on average the conditions are pleasant that month.
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Average weather in Joliet
In May Joliet generally has high temperatures with maximum daytime temperatures around 22°C, minimum nighttime temperatures around 10°C and high monthly rainfall. So on average the conditions are pleasant that month.
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Average weather in Naperville
In May Naperville generally has high temperatures with maximum daytime temperatures around 22°C, minimum nighttime temperatures around 10°C and high monthly rainfall. So on average the conditions are pleasant that month.
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Is your destination not in the list? Have a look at other destinations in Illinois, in the United States of America.
Is May the best time to visit Illinois?
In our opinion, May is a good time to visit Illinois with overall pleasant weather in Chicago.
Generally speaking, the best visiting conditions can be found in September offering mostly perfect weather in Chicago. The weather in January, February, March, November and December, on the other hand, tends to be poor.
Interested in more climate information?
We have much more information about the climate in Illinois.
Interested in the weather conditions in a specific month? Select the month below.
Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.
Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.