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Peoria, IL Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Peoria, IL?
Peoria, IL gets 37.6 in of precipitation a year over about 117 rainy days, and about 26.2 in of snow a season. July is the warmest month (average high 86°F) and January the coldest (average low 18°F).
Humid continental climate
Peoria, IL has hot summers and cold winters. Daytime highs range from about 33°F in January to 86°F in July. May is usually the wettest month, and snow falls in winter. The most comfortable time to visit is typically April and September to October, when daytime highs sit near 69°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 21° | 36° |
| Spring | Mar–May | 42° | 62° |
| Summer | Jun–Aug | 64° | 84° |
| Autumn | Sep–Nov | 44° | 64° |
How much rain does Peoria get?
Peoria gets 37.6 in of precipitation in an average year, spread over about 117 days with measurable rain. That is more rainy days than 76% of the US.
May is the wettest month, with 4.7 in. February is the driest, with 2.0 in. May has the most rainy days, about 13.
The longest dry spell in the last five years lasted 24 days, to February 18, 2026.
From September 2025 to August 2026 Peoria got 46.4 in of rain, against a normal of 37.6 in for those months. June 2026 had the most, with 12.6 in.
See where Peoria ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Illinois.
Does it snow in Peoria?
Yes. Peoria gets about 26.2 in of snow in an average season, measured at the reporting station.
The snowiest winter on record is 2013–14, with 57.8 in.
The most recent measurable snow at the station fell on March 17, 2026.
From September 2025 to August 2026 the station measured 27.7 in of snow, against a normal of 26.2 in for those months. December 2025 had the most, with 11.5 in.
See where Peoria ranks: snowiest cities in the US.
Peoria weather by month
Peoria weather in January
In January, Peoria averages a high of 33°F and a low of 18°F. It gets 2.1 in of precipitation over about 10 rainy days. Estimated sunshine is 28% of daylight hours, derived from ERA5 cloud cover. The January record high is 70°F (1989) and the record low is -25°F (1977).
Peoria weather in February
In February, Peoria averages a high of 38°F and a low of 21°F. It gets 2.0 in of precipitation over about 9 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The February record high is 78°F (2024) and the record low is -19°F (1996).
Peoria weather in March
In March, Peoria averages a high of 51°F and a low of 31°F. It gets 2.7 in of precipitation over about 11 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The March record high is 87°F (2026) and the record low is -6°F (2014).
Peoria weather in April
In April, Peoria averages a high of 63°F and a low of 42°F. It gets 4.0 in of precipitation over about 12 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The April record high is 92°F (1986) and the record low is 14°F (2018). April is one of the most comfortable months to visit.
Peoria weather in May
In May, Peoria averages a high of 73°F and a low of 52°F. It gets 4.7 in of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The May record high is 97°F (2018) and the record low is 28°F (2005).
Peoria weather in June
In June, Peoria averages a high of 83°F and a low of 62°F. It gets 3.7 in of precipitation over about 11 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The June record high is 105°F (1988) and the record low is 39°F (1993).
Peoria weather in July
In July, Peoria averages a high of 86°F and a low of 66°F. It gets 3.5 in of precipitation over about 9 rainy days. Estimated sunshine is 52% of daylight hours, derived from ERA5 cloud cover. The July record high is 104°F (2012) and the record low is 47°F (1972).
Peoria weather in August
In August, Peoria averages a high of 84°F and a low of 64°F. It gets 3.3 in of precipitation over about 8 rainy days. Estimated sunshine is 55% of daylight hours, derived from ERA5 cloud cover. The August record high is 103°F (1988) and the record low is 41°F (1986).
Peoria weather in September
In September, Peoria averages a high of 78°F and a low of 56°F. It gets 3.5 in of precipitation over about 8 rainy days. Estimated sunshine is 57% of daylight hours, derived from ERA5 cloud cover. The September record high is 100°F (2011) and the record low is 29°F (1995). September is one of the most comfortable months to visit.
Peoria weather in October
In October, Peoria averages a high of 65°F and a low of 44°F. It gets 3.2 in of precipitation over about 10 rainy days. Estimated sunshine is 55% of daylight hours, derived from ERA5 cloud cover. The October record high is 93°F (2006) and the record low is 19°F (1972). October is one of the most comfortable months to visit.
Peoria weather in November
In November, Peoria averages a high of 50°F and a low of 33°F. It gets 2.7 in of precipitation over about 9 rainy days. Estimated sunshine is 49% of daylight hours, derived from ERA5 cloud cover. The November record high is 80°F (2000) and the record low is -2°F (1977).
Peoria weather in December
In December, Peoria averages a high of 38°F and a low of 23°F. It gets 2.2 in of precipitation over about 10 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The December record high is 71°F (1982) and the record low is -23°F (1989).
Sunshine, humidity and wind in Peoria
September is the sunniest month in Peoria, with estimated sunshine of 57% of daylight hours from ERA5 cloud cover. January is the cloudiest, at 28%. The annual cloud-cover estimate is 45% of daylight hours; it is not a measurement of sunshine duration. Peoria is cloudier than 56% of the US.
Humidity peaks in January at 77% and is lowest in April at 60%.
Wind averages 8 mph over the year, and April is the windiest month at 10 mph.
Peoria has about 23 days a year above 90°F. Peoria is cooler than 57% of the US.
Thunderstorms occur on about 43 days a year.
See where Peoria ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in Peoria
The first fall freeze in Peoria typically comes around October 17, and the last spring freeze around April 17. That leaves a frost-free growing season of about 183 days.
Peoria weather records
These records cover GENERAL WAYNE A DOWNING INTL A during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Peoria station is 105°F, on June 25, 1988. The coldest is -25°F, on January 17, 1977.
The wettest day in the available station history brought 5.2 in of precipitation, on July 15, 2020.
41 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.7°F per decade since 1970.
The best time to visit Peoria
The most comfortable time to visit is typically April and September to October, when daytime highs sit near 69°F.
Winter (December–February) is cold, with average highs around 36°F and lows near 21°F. Snow is possible.
Spring (March–May) is mild, with average highs around 62°F and lows near 42°F.
Summer (June–August) is hot, with average highs around 84°F and lows near 64°F. It can feel humid.
Autumn (September–November) is mild, with average highs around 64°F and lows near 44°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Wind | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|---|
| January | 18° | 33° | 2.1 in | 10 | 9 mph | 77% | 28% | 70° | -25° |
| February | 21° | 38° | 2.0 in | 9 | 9 mph | 68% | 44% | 78° | -19° |
| March | 31° | 51° | 2.7 in | 11 | 10 mph | 65% | 36% | 87° | -6° |
| April | 42° | 63° | 4.0 in | 12 | 10 mph | 60% | 43% | 92° | 14° |
| May | 52° | 73° | 4.7 in | 13 | 8 mph | 62% | 38% | 97° | 28° |
| June | 62° | 83° | 3.7 in | 11 | 7 mph | 60% | 53% | 105° | 39° |
| July | 66° | 86° | 3.5 in | 9 | 6 mph | 73% | 52% | 104° | 47° |
| August | 64° | 84° | 3.3 in | 8 | 6 mph | 72% | 55% | 103° | 41° |
| September | 56° | 78° | 3.5 in | 8 | 6 mph | 68% | 57% | 100° | 29° |
| October | 44° | 65° | 3.2 in | 10 | 8 mph | 64% | 55% | 93° | 19° |
| November | 33° | 50° | 2.7 in | 9 | 9 mph | 66% | 49% | 80° | -2° |
| December | 23° | 38° | 2.2 in | 10 | 9 mph | 73% | 34% | 71° | -23° |
Station: GENERAL WAYNE A DOWNING INTL A, 9 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Peoria climate questions
How much rain does Peoria get?
Peoria gets 37.6 in of precipitation in an average year, over about 117 rainy days.
What is the wettest month in Peoria?
May is the wettest month in Peoria, with 4.7 in. February is the driest, with 2.0 in.
How many rainy days does Peoria have a year?
Peoria has about 117 days with measurable rain in an average year. May has the most, about 13.
Does it snow in Peoria?
Yes. Peoria gets about 26.2 in of snow in an average season. The snowiest winter on record is 2013–14, with 57.8 in.
What is the hottest month in Peoria?
July is the warmest month in Peoria, with an average high of 86°F.
What is the coldest month in Peoria?
January is the coldest month in Peoria, with an average low of 18°F.
What is the record high temperature in Peoria?
Within the available 1970–2026 station history, the record high at the Peoria station is 105°F, set on June 25, 1988. The record low is -25°F, on January 17, 1977.
What is the sunniest month in Peoria?
September is the sunniest month in Peoria, with estimated sunshine of 57% of daylight hours from ERA5 cloud cover. January is the cloudiest.
When is the first frost in Peoria?
The first fall freeze in Peoria typically comes around October 17. The last spring freeze is around April 17.
What is the best time to visit Peoria?
The most comfortable time to visit is typically April and September to October, when daytime highs sit near 69°F.