West Salem, IL climate
West Salem has chilly winters and warm summers. A typical July afternoon reaches 88°, a January night drops to 23°, and about 11 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decade16° warmer than normal today. The forecast high is 91°, and a typical Oct 1 in West Salem peaks around 75°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in West Salem feels like
Winter
Spring
Summer
Fall
West Salem 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 | 39° | 23° | 3.3" | 3.6" | 11 | 5 | 24° – 41° |
| February | 44° | 27° | 2.7" | 2.6" | 9 | 3 | 24° – 45° |
| March | 55° | 35° | 4.0" | 1.1" | 12 | 1 | 37° – 60° |
| April | 67° | 45° | 5.1" | 0 | 11 | 0 | 49° – 61° |
| May | 76° | 55° | 5.2" | 0 | 13 | 0 | 60° – 73° |
| June | 85° | 64° | 4.7" | 0 | 11 | 0 | 69° – 78° |
| July | 88° | 67° | 4.4" | 0 | 9 | 0 | 72° – 84° |
| August | 87° | 65° | 3.4" | 0 | 8 | 0 | 71° – 82° |
| September | 81° | 57° | 3.6" | 0 | 8 | 0 | 65° – 75° |
| October | 69° | 46° | 3.6" | 0 | 9 | 0 | 53° – 63° |
| November | 55° | 36° | 4.0" | 0.5" | 10 | 0 | 38° – 51° |
| December | 43° | 27° | 3.3" | 2.7" | 11 | 4 | 22° – 45° |
| Year | 66° | 46° | 47.2" | 10.5" | 120 | 14 |
“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 Salem
West Salem gets 47 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 120 days a year. Snow covers the ground about 14 days of the year.
About 206 frost-free days a year
In half of years the last 32° night comes by April 4 and the first one by October 28. That leaves about 206 frost-free days for gardens, longer than 76% of U.S. towns.
Heating and cooling a home in West Salem
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In West Salem, 75% of that work is heating and 25% is cooling.
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.
How West Salem 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 Salem averaged 1.0° warmer than the 1900s. The biggest change is in February (+1.7°). The shift is smaller than in 70% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at West Salem’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 37° to 60°. June is the most reliable, staying within 9°.
Common questions about West Salem’s climate
What is the coldest month in West Salem?
January, with a typical high of 39° and a low of 23°.
What is the hottest month in West Salem?
July, with a typical high of 88° and a low of 67°. About 44 days a year reach 90°.
How much snow does West Salem get?
About 11 inches in a normal winter, most of it in January.
When is the first frost in West Salem?
In half of years the first 32° night comes by October 28, and the last spring frost by April 4.
What is the rainiest month in West Salem?
May, with 5.2 inches of rain and melted snow. The year totals 47 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for West Salem itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Olney 2s, IL (13 mi, snow) and Albion, IL (10 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.