Illinois Waterway Project Office · Photo: Grogan, Brian · Public domainPeoria’s winters are colder and snowier than most of the U.S.
A typical July afternoon reaches 85°, a January night drops to 17°, and about 26 inches of snow falls in a normal winter.
A year in Peoria at a glance
Each month’s typical high and low, and what it brings.
What stands out about Peoria’s climate
Compared with towns across the U.S., with Peoria’s place in Illinois beside it.
What a year in Peoria feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 189 frost-free days a year
In half of years the last 32° night comes by April 16 and the first by October 23. Frost and day counts come from NOAA’s station at Peoria Gtr Peoria Airport, 7 miles from the city’s center point, at about the same height.
The 2023 USDA map puts Peoria’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −10°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 26 inches of snow a winter
Snow, measured at Peoria Gtr Peoria Airport, falls mostly in January. Precipitation (rain plus melted snow) adds up to 38 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 117 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Peoria
83% of the work is heating. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Peoria Gtr Peoria Airport.
Living with Peoria’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
189 frost-free days in zone 6a. The last frost comes by Apr 16 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 23.
Months with highs of 62–84° and lows of 40° or more: April, May, June, August, September and October. 34 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Peoria from natural hazards, river flooding is the largest share (36%); heat waves, cold waves, winter storms and ice storms together are 38%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Peoria and its neighbors
Pekin Township the hottest July afternoons (87°, 1° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Peoria’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Peoria, IL | 17° | 85° | 38" | 26" |
| Centerville, IA | 15° | 85° | 38" | 22" |
| Defiance, OH | 19° | 85° | 37" | 24" |
| Huntington, IN | 18° | 84° | 40" | 26" |
| Lock Haven, PA | 19° | 86° | 41" | 30" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Peoria averaged 1.4° warmer than the 1900s. The biggest change is in December (+2.5°).
A bigger shift than in 52% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods. In a city of 111,000 people, part of the change is the city itself: pavement and buildings hold heat (the urban heat island).
How Peoria compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Peoria’s place among Illinois’.
Peoria weather by month
Highs, lows and precipitation from NOAA’s grid at Peoria’s center; snow, wet days and snow on the ground from Peoria Gtr Peoria Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 32° | 17° | 2.0" | 7.7" | 10 | 14 | 17° – 37° |
| February | 37° | 21° | 1.9" | 6.9" | 9 | 9 | 17° – 40° |
| March | 50° | 30° | 2.5" | 3.3" | 11 | 3 | 33° – 54° |
| April | 63° | 40° | 3.9" | 0.5" | 12 | 0 | 44° – 58° |
| May | 74° | 52° | 4.7" | 0.0" | 13 | 0 | 57° – 71° |
| June | 83° | 61° | 4.2" | 0.0" | 11 | 0 | 68° – 76° |
| July | 85° | 65° | 4.0" | 0.0" | 9 | 0 | 70° – 81° |
| August | 84° | 62° | 3.7" | 0.0" | 8 | 0 | 67° – 78° |
| September | 78° | 55° | 3.5" | 0.0" | 8 | 0 | 60° – 71° |
| October | 65° | 43° | 3.1" | 0.1" | 10 | 0 | 49° – 59° |
| November | 50° | 32° | 2.6" | 1.5" | 9 | 1 | 33° – 50° |
| December | 37° | 22° | 2.1" | 6.2" | 10 | 8 | 15° – 40° |
| Year | 61° | 42° | 38.3" | 26.2" | 117 | 36 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 15° to 40°. June is the most reliable, staying within 8°.
Where Peoria’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Peoria’s center.
- Snow: Peoria Gtr Peoria Airport.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Peoria Gtr Peoria Airport, 7 miles from the city’s center point, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Peoria’s climate
What is the weather like in Peoria?
A typical July afternoon reaches 85°, a January night drops to 17°, and about 26 inches of snow falls in a normal winter. Colder January nights than 78% of U.S. towns; hotter July afternoons than 51% of U.S. towns.
How cold does it get in Peoria in winter?
January nights average 17°. About 118 nights a year reach 32° or below and 6 reach 0° or below. In the coldest January of the last 30 years the month averaged 17°.
How much snow does Peoria get?
About 26 inches in a normal winter at Peoria Gtr Peoria Airport, most of it in January, with snow on the ground about 36 days a year.
How hot does it get in Peoria?
July, with a typical high of 85° and a low of 65°. About 23 days a year reach 90° (Peoria Gtr Peoria Airport).
When is the first and last frost in Peoria?
In half of years the last spring frost (32°) comes by April 16 and the first fall frost by October 23, about 189 frost-free days, at Peoria Gtr Peoria Airport.
What growing zone is Peoria in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −10°.
What is the best time of year to visit Peoria?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Peoria getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 52% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Peoria.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.