Climate averages 1991–2020
Peoria (Illinois), United States weather
in May.
A warm, wet month: the 5th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Peoria (Illinois), United States: daytime highs average 22.1°C and nights cool to about 12.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 117 mm of rain on roughly 13 days, which makes May a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 25 min on an average May day.
The nearest other city in this atlas is Bloomington (Illinois), United States (55 km away). In May its highs average 21.9°C, about as warm as Peoria (Illinois), United States, with 119 mm of rain.
Among the 498 cities listed in the United States, Peoria (Illinois), United States ranks joint 290th of 498 for the warmest May highs and joint 432nd of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Peoria (Illinois), United States is 1.7°C cooler than that mean.
From May to June, average highs rise by 4.9°C to 26.9°C, and monthly rainfall falls from 117 mm to 111 mm.
The annual picture
May in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Peoria (Illinois), United States climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.6°C-7.4°C | -7.4°C | 53 | 8.0 | 9.610 h |
| February | 3.4°C-5.6°C | -5.6°C | 53 | 7.2 | 10.611 h |
| March | 9.9°C0.1°C | 0.1°C | 75 | 10.1 | 11.912 h |
| April | 16.4°C6.3°C | 6.3°C | 112 | 11.8 | 13.313 h |
| May, selected | 22.1°C12.5°C | 12.5°C | 117 | 13.0 | 14.414 h |
| June | 26.9°C17.8°C | 17.8°C | 111 | 11.6 | 15.015 h |
| July | 28.8°C20.1°C | 20.1°C | 96 | 10.2 | 14.815 h |
| August | 28.0°C19.4°C | 19.4°C | 79 | 9.3 | 13.814 h |
| September | 24.4°C15.4°C | 15.4°C | 76 | 7.9 | 12.513 h |
| October | 17.5°C8.9°C | 8.9°C | 79 | 8.6 | 11.211 h |
| November | 9.7°C2.0°C | 2.0°C | 71 | 8.2 | 10.010 h |
| December | 3.3°C-4.0°C | -4.0°C | 57 | 7.7 | 9.39 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Bloomington (Illinois), United States in MayUnited States · 55 kmHigh 21.9°C · Low 11.9°C · 119 mm rain
- Springfield (Illinois), United States in MayUnited States · 99 kmHigh 22.7°C · Low 13.0°C · 117 mm rain
- Decatur in MayUnited States · 109 kmHigh 22.5°C · Low 12.8°C · 122 mm rain
- Davenport in MayUnited States · 124 kmHigh 21.6°C · Low 12.0°C · 119 mm rain
- Champaign in MayUnited States · 131 kmHigh 22.2°C · Low 12.2°C · 118 mm rain
- Joliet in MayUnited States · 156 kmHigh 21.2°C · Low 11.0°C · 116 mm rain
- Aurora (Illinois), United States in MayUnited States · 159 kmHigh 20.7°C · Low 10.5°C · 117 mm rain
- Bolingbrook in MayUnited States · 169 kmHigh 20.6°C · Low 10.6°C · 113 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Peoria) is explained once on the Peoria (Illinois), United States year overview and on the Sources, method and limits page.