Champaign weather in May: Champaign, Illinois: normal highs, lows, rain and records for May
Champaign in May has a normal high of 76°F and a normal low of 52°F, a daily mean of 64°F, rising from 70°F on the 1st to 80°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 4.39 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 24°C and low of 11°C, 112 mm of precipitation in May.
- NOAA stationChampaign Willard Airport
- Station IDUSW00094870
- Location40.04°N 88.28°W
- Elevation754 ft (230 m)
- From the center5 miles
- Population91,961
- Jan 34° 18°
- Feb 39° 22°
- Mar 52° 31°
- Apr 65° 41°
- May 76° 52°
- Jun 84° 62°
- Jul 85° 64°
- Aug 84° 62°
- Sep 79° 55°
- Oct 67° 43°
- Nov 52° 32°
- Dec 39° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Champaign in May?
The normal high is 76°F and the normal low 52°F, for a daily mean of 64.0°F. May is 11.2°F warmer than April and 8.6°F cooler than June. May is the 5th warmest month of the year in Champaign and the wettest. Across the month the normal high rises 10°F, from 70°F on May 1 to 80°F on May 31. From one year to the next May's mean temperature typically moves about 3.5°F either way (NOAA's standard deviation), so roughly two Mays in three average between 61°F and 68°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 43%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 70°F | 47°F | 42% | 28% |
| May 8 | 73°F | 49°F | 43% | 28% |
| May 15 | 75°F | 52°F | 42% | 28% |
| May 22 | 78°F | 55°F | 42% | 27% |
| May 31 | 80°F | 58°F | 41% | 26% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 70°F | 47°F | 42% | 28% | 13 h 50 min |
| May 2 | 71°F | 47°F | 42% | 28% | 13 h 50 min |
| May 3 | 71°F | 48°F | 42% | 28% | 14 h |
| May 4 | 71°F | 48°F | 43% | 28% | 14 h |
| May 5 | 72°F | 48°F | 43% | 28% | 14 h |
| May 6 | 72°F | 49°F | 43% | 28% | 14 h |
| May 7 | 72°F | 49°F | 43% | 28% | 14 h 10 min |
| May 8 | 73°F | 49°F | 43% | 28% | 14 h 10 min |
| May 9 | 73°F | 50°F | 43% | 28% | 14 h 10 min |
| May 10 | 74°F | 50°F | 43% | 28% | 14 h 10 min |
| May 11 | 74°F | 51°F | 43% | 28% | 14 h 10 min |
| May 12 | 74°F | 51°F | 43% | 28% | 14 h 20 min |
| May 13 | 75°F | 51°F | 43% | 28% | 14 h 20 min |
| May 14 | 75°F | 52°F | 43% | 28% | 14 h 20 min |
| May 15 | 75°F | 52°F | 42% | 28% | 14 h 20 min |
| May 16 | 76°F | 53°F | 42% | 28% | 14 h 20 min |
| May 17 | 76°F | 53°F | 42% | 28% | 14 h 30 min |
| May 18 | 76°F | 53°F | 42% | 27% | 14 h 30 min |
| May 19 | 77°F | 54°F | 42% | 27% | 14 h 30 min |
| May 20 | 77°F | 54°F | 42% | 27% | 14 h 30 min |
| May 21 | 77°F | 54°F | 42% | 27% | 14 h 30 min |
| May 22 | 78°F | 55°F | 42% | 27% | 14 h 30 min |
| May 23 | 78°F | 55°F | 41% | 27% | 14 h 40 min |
| May 24 | 78°F | 55°F | 41% | 27% | 14 h 40 min |
| May 25 | 79°F | 56°F | 41% | 27% | 14 h 40 min |
| May 26 | 79°F | 56°F | 41% | 27% | 14 h 40 min |
| May 27 | 79°F | 56°F | 41% | 26% | 14 h 40 min |
| May 28 | 80°F | 57°F | 41% | 26% | 14 h 40 min |
| May 29 | 80°F | 57°F | 41% | 26% | 14 h 40 min |
| May 30 | 80°F | 57°F | 41% | 26% | 14 h 50 min |
| May 31 | 80°F | 58°F | 41% | 26% | 14 h 50 min |
- Normal high
- 76°FMay average
- Normal low
- 52°FMay average
- Precipitation
- 4.39 inmonth total
- Days with precipitation
- 130.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 50 min to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 22
- Days at 80°F or more
- 12
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094870; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Champaign in May?
On a given May day the chance of 0.01 inch or more is 42% on average, highest around May 8 (43%). In all, 4.39 in falls on 13 days of a normal May, 1 of them with an inch or more.
In a normal May in Champaign, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094870.
What are the records for May in Champaign?
The warmest May temperature on this station's record (since 1997) is 97°F, on May 28, 2018; the coldest is 28°F, on May 3, 2005. The wettest May brought 6.64 in (2014).
The May mean against the 1991-2020 normal of 64.0°F: 2021 62.2°F (−1.8), 2022 66.7°F (+2.7), 2023 66.7°F (+2.7), 2024 68.1°F (+4.1), 2025 63.3°F (−0.7). 3 of 5 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 62.2°F | −1.8°F | 3.53 in |
| 2022 | 66.7°F | +2.7°F | 3.23 in |
| 2023 | 66.7°F | +2.7°F | 2.11 in |
| 2024 | 68.1°F | +4.1°F | 6.44 in |
| 2025 | 63.3°F | −0.7°F | 2.66 in |
Source: records: ACIS, station USW00094870; recent months: ACIS, station USW00094870. Records and recent months use complete months only.
How does May in Champaign compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, May normal highs run from 67°F in Waukegan to 79°F in Belleville; Champaign's is 76°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.