Fairview Heights, IL climate
Fairview Heights 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 decadeWhat a year in Fairview Heights feels like
Winter
Spring
Summer
Fall
Fairview Heights 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 | 40° | 23° | 2.6" | 3.4" | 7 | 6 | 26° – 42° |
| February | 45° | 27° | 2.2" | 3.3" | 8 | 2 | 27° – 46° |
| March | 56° | 36° | 3.5" | 1.0" | 10 | 0 | 39° – 59° |
| April | 67° | 45° | 4.8" | 0 | 10 | 0 | 49° – 62° |
| May | 77° | 56° | 5.0" | 0 | 12 | 0 | 61° – 74° |
| June | 85° | 65° | 4.4" | 0 | 9 | 0 | 70° – 79° |
| July | 88° | 69° | 3.9" | 0 | 7 | 0 | 74° – 85° |
| August | 87° | 66° | 3.3" | 0 | 7 | 0 | 71° – 83° |
| September | 81° | 58° | 3.4" | 0 | 7 | 0 | 65° – 75° |
| October | 69° | 47° | 3.2" | 0 | 8 | 0 | 53° – 64° |
| November | 55° | 36° | 3.4" | 0.6" | 8 | 1 | 38° – 53° |
| December | 44° | 28° | 2.7" | 2.9" | 8 | 3 | 22° – 44° |
| Year | 66° | 46° | 42.3" | 11.2" | 100 | 12 |
“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 Fairview Heights
Fairview Heights gets 42 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 100 days a year. Snow covers the ground about 12 days of the year.
About 200 frost-free days a year
In half of years the last 32° night comes by April 8 and the first one by October 26. That leaves about 200 frost-free days for gardens, longer than 72% of U.S. towns.
Heating and cooling a home in Fairview Heights
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Fairview Heights, 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.
Fairview Heights and its neighbors
Fairview Heights borders 9 towns with climate data. January nights across them vary by 0.5°. O'Fallon has the coldest January nights (23°) and East St. Louis the hottest July afternoons (89°). Fairview Heights’s January low is 23° and its July high 88°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Fairview Heights 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 Fairview Heights averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.2°). The shift is smaller than in 63% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Fairview Heights’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 22° to 44°. June is the most reliable, staying within 9°.
Common questions about Fairview Heights’s climate
What is the coldest month in Fairview Heights?
January, with a typical high of 40° and a low of 23°.
What is the hottest month in Fairview Heights?
July, with a typical high of 88° and a low of 69°. About 46 days a year reach 90°.
How much snow does Fairview Heights get?
About 11 inches in a normal winter, most of it in January.
When is the first frost in Fairview Heights?
In half of years the first 32° night comes by October 26, and the last spring frost by April 8.
What is the rainiest month in Fairview Heights?
May, with 5.0 inches of rain and melted snow. The year totals 42 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Fairview Heights itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Belleville Siu Rsch, IL (10 mi, snow) and Cahokia St Louis Airport, IL (8 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.