Peoria County weather, town by town
20 places in Peoria County, Illinois, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1943 to 2025. Station extremes, not official state records.
Peoria County Weather Facts
Peoria County has 20 places on myweatherrock (11 villages, 5 census-designated places, 4 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 105°F at General Wayne A Downing Intl A on June 25, 1988. The coldest night is -25°F at General Wayne A Downing Intl A on January 17, 1977. The wettest day brought 5.47 inches of rain at Lacon on July 16, 1977. The biggest single-day snow measured 12.99 inches at Lacon on December 1, 2006. Those are station measurements from NOAA's daily records, 1943 to 2025, not official state records. By area the largest place is Peoria, about 48 square miles.
About Peoria County weather
The map on the Now tab shows every Peoria County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 20 Peoria County towns with station normals, the warmest month is July, when the day usually reaches 86°F, and the coldest is January, when the night usually falls to 17°F. April is the wettest, with rain on about 12 days.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
Peoria County weather records
Measured at the NOAA stations serving these towns, daily records 1943 to 2025. Station extremes, not official state records.
Common questions about Peoria County weather
- What is the hottest temperature recorded at a Peoria County station?
- 105°F at General Wayne A Downing Intl A on June 25, 1988, in the NOAA daily station records myweatherrock holds (1943 to 2025).
- What is the coldest temperature recorded at a Peoria County station?
- -25°F at General Wayne A Downing Intl A on January 17, 1977.
- What is the most rain a Peoria County station has measured in one day?
- 5.47 inches at Lacon on July 16, 1977.
- What is the biggest one-day snowfall at a Peoria County station?
- 12.99 inches at Lacon on December 1, 2006.
- How many Peoria County towns have a weather page here?
- 20: 11 villages, 5 census-designated places, 4 cities. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the Peoria County forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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