West Peoria, IL climate
West Peoria has chilly winters and warm summers. A typical July afternoon reaches 86°, a January night drops to 17°, and about 26 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in West Peoria feels like
Winter
Spring
Summer
Fall
West Peoria weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 17° | 2.1" | 7.7" | 10 | 14 | 18° – 38° |
| February | 38° | 21° | 1.9" | 6.9" | 9 | 9 | 18° – 41° |
| March | 51° | 31° | 2.5" | 3.3" | 11 | 3 | 34° – 55° |
| April | 64° | 41° | 3.9" | 0.5" | 12 | 0 | 45° – 59° |
| May | 74° | 52° | 4.7" | 0 | 13 | 0 | 57° – 72° |
| June | 83° | 62° | 4.2" | 0 | 11 | 0 | 68° – 76° |
| July | 86° | 65° | 3.9" | 0 | 9 | 0 | 70° – 82° |
| August | 84° | 63° | 3.7" | 0 | 8 | 0 | 68° – 79° |
| September | 79° | 55° | 3.5" | 0 | 8 | 0 | 61° – 72° |
| October | 66° | 43° | 3.1" | 0.1" | 10 | 0 | 49° – 60° |
| November | 51° | 32° | 2.7" | 1.5" | 9 | 1 | 34° – 50° |
| December | 38° | 23° | 2.1" | 6.2" | 10 | 8 | 16° – 41° |
| Year | 62° | 42° | 38.2" | 26.2" | 117 | 36 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in West Peoria
West Peoria gets 38 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 117 days a year. Snow covers the ground about 36 days of the year.
About 189 frost-free days a year
In half of years the last 32° night comes by April 16 and the first one by October 23. That leaves about 189 frost-free days for gardens, longer than 63% of U.S. towns.
Heating and cooling a home in West Peoria
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In West Peoria, 83% of that work is heating and 17% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
West Peoria and its neighbors
West Peoria borders 3 towns with climate data. January nights across them vary by 0.6°. Peoria has the coldest January nights (17°) and Peoria City the hottest July afternoons (86°). West Peoria’s January low is 17° and its July high 86°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How West Peoria compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in West Peoria averaged 1.4° warmer than the 1900s. The biggest change is in December (+2.6°). The shift is larger than in 65% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at West Peoria’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 16° to 41°. June is the most reliable, staying within 8°.
Common questions about West Peoria’s climate
What is the coldest month in West Peoria?
January, with a typical high of 33° and a low of 17°.
What is the hottest month in West Peoria?
July, with a typical high of 86° and a low of 65°. About 23 days a year reach 90°.
How much snow does West Peoria get?
About 26 inches in a normal winter, most of it in January.
When is the first frost in West Peoria?
In half of years the first 32° night comes by October 23, and the last spring frost by April 16.
What is the rainiest month in West Peoria?
May, with 4.7 inches of rain and melted snow. The year totals 38 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for West Peoria itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Peoria Gtr Peoria Airport, IL (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.