Illinois in may: average Weather, Temperature and Climate
Weather in Illinois in may 2025
The weather in Illinois in may comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout may
good weather
Weather at 6am
58°F
Clear/Sunny
36% of time
19%
14%
14%
Weather at 12pm
70°F
Clear/Sunny
37% of time
22%
16%
14%
Weather at 6pm
68°F
Clear/Sunny
39% of time
20%
18%
11%
Weather at 3am
58°F
34%
20%
19%
11%
Evolution of daily average temperature and precipitation in Illinois in may
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Illinois in may.
The climate of Illinois in may is good
The climate in may in Illinois is wet (with 5.9in of rainfall over 10 days). The weather's not getting better compared to the previous month since in april there is an average of 4.9in of rainfall over 7 days.
The climate quite nice in this location may. The thermometer averaged maximum of 72°F. The minimum is 58°F. Thus, the mean temperature average in may in Illinois is 65°F. Note that seasonal normals in contrast with those observed in Illinois in may with a maximum record of 94°F in 2018 and a minimum record of 34°F in 2020. You can plan to have about 23 days with temperatures above 65°F, or 74% of the month.
On average, in Illinois, the days of may last 14:28. Sunrise is at 04:40 and sunset is at 19:08.
With a good climate, may is a good time to go in this city in United States.
Seasonal average climate and temperature of Illinois in may
Check below seasonal norms These datas are generated from the weather statements of the last years of the month of may.
| May | |||||
| Outside temperature | |||||
| Average temperature | 65°F | ||||
| Highest temperature | 72°F | ||||
| Lowest temperature | 58°F | ||||
| Highest record temperature | 94°F (2018) | ||||
| Lowest record temperature | 34°F (2020) | ||||
| Number of days at +86°F | 1 day(s) (3%) | ||||
| Number of days at +65°F | 23 day(s) (74%) | ||||
| Number of days at -32°F | 0 day(s) (0%) | ||||
| Wind | |||||
| Wind speed | 20km/h | ||||
| Wind temperature | 56°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 5.9in | ||||
| Number of days with rainfall | 10 day(s) (32%) | ||||
| Record daily rainfall | 1.9in (2013) | ||||
| Snowfall | 0cm | ||||
| Other climate data | |||||
| Humidity | 88% | ||||
| Visibility | 9.1km | ||||
| Cloud cover | 40% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 13 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 04:40 | ||||
| Time of sunset | 19:08 | ||||
| Length of day | 14:28 | ||||
| Our opinion about the weather in may | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last may?
Here is the day by day recorded weather in Illinois in may 2024:
61°F to 76°F
56°F to 79°F
61°F to 72°F
54°F to 74°F
52°F to 68°F
50°F to 72°F
63°F to 77°F
59°F to 79°F
52°F to 61°F
47°F to 63°F
52°F to 67°F
54°F to 76°F
61°F to 65°F
50°F to 61°F
54°F to 65°F
59°F to 65°F
63°F to 74°F
61°F to 79°F
68°F to 83°F
68°F to 83°F
67°F to 85°F
58°F to 72°F
58°F to 76°F
63°F to 77°F
54°F to 74°F
65°F to 77°F
58°F to 70°F
56°F to 67°F
52°F to 65°F
52°F to 70°F
56°F to 70°F
Map: other cities in the United States (USA) in may
Cities near Illinois:
| Chicago in may | good weather |
| St. Louis (Missouri) in may | good weather |
| Indianapolis in may | good weather |
| Wisconsin in may | good weather |
| Missouri in may | good weather |
| Des Moines in may | good weather |
| Louisville (Kentucky) in may | good weather |
| Cincinnati in may | good weather |
| Kansas City in may | good weather |
| Nashville in may | good weather |
| Detroit in may | good weather |
| Minneapolis (Minnesota) in may | good weather |
Click over cities on the map for information about the weather in may.
Illinois
perfect weather
good
tolerable
bad
very bad
Weather data for Illinois in may:
Weather data for Illinois for may are derived from an average of the weather forecast since 2009 in Illinois. There is a margin of error and these forecasts are to be considered as general information only. The weather in Illinois can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Illinois.