Peoria weather in May: Peoria, Illinois: normal highs, lows, rain and records for May
Peoria in May has a normal high of 74°F and a normal low of 53°F, a daily mean of 64°F, rising from 69°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 4.69 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 12°C, 119 mm of precipitation in May.
- NOAA stationGeneral Wayne A. Downing International Airport
- Station IDUSW00014842
- Location40.67°N 89.68°W
- Elevation650 ft (198 m)
- From the center7 miles
- Population111,696
- Jan 34° 18°
- Feb 39° 21°
- Mar 51° 32°
- Apr 64° 42°
- May 74° 53°
- Jun 83° 62°
- Jul 86° 66°
- Aug 85° 64°
- Sep 78° 56°
- Oct 65° 44°
- Nov 51° 33°
- Dec 39° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Peoria in May?
The normal high is 74°F and the normal low 53°F, for a daily mean of 63.5°F. May is 10.6°F warmer than April and 9.3°F cooler than June. May is the 5th warmest month of the year in Peoria and the wettest. Across the month the normal high rises 10°F, from 69°F on May 1 to 79°F on May 31. From one year to the next May's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Mays in three average between 60°F and 67°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 41%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 69°F | 48°F | 41% | 27% |
| May 8 | 72°F | 50°F | 41% | 27% |
| May 15 | 74°F | 53°F | 40% | 27% |
| May 22 | 76°F | 55°F | 39% | 26% |
| May 31 | 79°F | 58°F | 38% | 24% |
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 | 69°F | 48°F | 41% | 27% | 13 h 50 min |
| May 2 | 70°F | 48°F | 41% | 27% | 14 h |
| May 3 | 70°F | 48°F | 41% | 27% | 14 h |
| May 4 | 70°F | 49°F | 41% | 27% | 14 h |
| May 5 | 71°F | 49°F | 41% | 27% | 14 h |
| May 6 | 71°F | 49°F | 41% | 27% | 14 h 10 min |
| May 7 | 71°F | 50°F | 41% | 27% | 14 h 10 min |
| May 8 | 72°F | 50°F | 41% | 27% | 14 h 10 min |
| May 9 | 72°F | 51°F | 41% | 27% | 14 h 10 min |
| May 10 | 72°F | 51°F | 41% | 27% | 14 h 10 min |
| May 11 | 73°F | 51°F | 41% | 27% | 14 h 20 min |
| May 12 | 73°F | 52°F | 41% | 27% | 14 h 20 min |
| May 13 | 73°F | 52°F | 41% | 27% | 14 h 20 min |
| May 14 | 74°F | 52°F | 41% | 27% | 14 h 20 min |
| May 15 | 74°F | 53°F | 40% | 27% | 14 h 20 min |
| May 16 | 74°F | 53°F | 40% | 27% | 14 h 30 min |
| May 17 | 75°F | 53°F | 40% | 26% | 14 h 30 min |
| May 18 | 75°F | 54°F | 40% | 26% | 14 h 30 min |
| May 19 | 75°F | 54°F | 40% | 26% | 14 h 30 min |
| May 20 | 76°F | 54°F | 39% | 26% | 14 h 30 min |
| May 21 | 76°F | 55°F | 39% | 26% | 14 h 40 min |
| May 22 | 76°F | 55°F | 39% | 26% | 14 h 40 min |
| May 23 | 77°F | 55°F | 39% | 26% | 14 h 40 min |
| May 24 | 77°F | 56°F | 39% | 26% | 14 h 40 min |
| May 25 | 77°F | 56°F | 39% | 25% | 14 h 40 min |
| May 26 | 78°F | 56°F | 39% | 25% | 14 h 40 min |
| May 27 | 78°F | 57°F | 38% | 25% | 14 h 50 min |
| May 28 | 78°F | 57°F | 38% | 25% | 14 h 50 min |
| May 29 | 78°F | 57°F | 38% | 25% | 14 h 50 min |
| May 30 | 79°F | 58°F | 38% | 24% | 14 h 50 min |
| May 31 | 79°F | 58°F | 38% | 24% | 14 h 50 min |
- Normal high
- 74°FMay average
- Normal low
- 53°FMay average
- Precipitation
- 4.69 inmonth total
- Days with precipitation
- 130.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 50 min to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 20
- Days at 80°F or more
- 10
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014842; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Peoria in May?
On a given May day the chance of 0.01 inch or more is 40% on average, highest around May 1 (41%). In all, 4.69 in falls on 13 days of a normal May, 1 of them with an inch or more.
In a normal May in Peoria, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014842.
How humid and windy is Peoria in May?
At 3 p.m. the normal temperature is 76°F with 51% relative humidity and a dew point of 57°F; at 6 a.m. it is 61°F with 82% humidity. The wind averages 7.6 mph, most often from the southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 61°F | 56°F | 82% | 6.1 mph | 58% |
| 9 a.m. | 69°F | 57°F | 66% | 8.6 mph | 56% |
| noon | 74°F | 57°F | 55% | 9.9 mph | 53% |
| 3 p.m. | 76°F | 57°F | 51% | 10.1 mph | 53% |
| 6 p.m. | 74°F | 57°F | 55% | 8.3 mph | 62% |
| 9 p.m. | 67°F | 57°F | 70% | 6.1 mph | 64% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014842. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Peoria?
The warmest May temperature on Peoria's official record (since 1883) is 104°F, on May 31, 1934; the coldest is 25°F, on May 10, 1966. The wettest May brought 11.49 in (1915).
The May mean against the 1991-2020 normal of 63.5°F: 2021 61.2°F (−2.3), 2022 65.8°F (+2.3), 2023 65.5°F (+2.0), 2024 67.9°F (+4.4), 2025 63.4°F (−0.1), 2026 62.5°F (−1.0). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.2°F | −2.3°F | 6.35 in |
| 2022 | 65.8°F | +2.3°F | 3.48 in |
| 2023 | 65.5°F | +2.0°F | 1.83 in |
| 2024 | 67.9°F | +4.4°F | 2.49 in |
| 2025 | 63.4°F | −0.1°F | 2.54 in |
| 2026 | 62.5°F | −1.0°F | 1.25 in |
Source: records: ACIS, NWS threaded record PIAthr; recent months: ACIS, station USW00014842. Records and recent months use complete months only.
How does May in Peoria 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; Peoria's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.