Divernon has chilly winters and warm summers
A typical July afternoon reaches 86°, a January night drops to 20°, and about 14 inches of snow falls in a normal winter.
A year in Divernon at a glance
Each month’s typical high and low, and what it brings.
What stands out about Divernon’s climate
Read from where Divernon sits among Illinois’s towns. The page puts what stands out first.
Living with Divernon’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
205 frost-free days. The last frost comes by Apr 7 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 29.
About 14" a winter over 5 days with an inch or more, most in January.
Months averaging under 55° run from November through April. Heating is 79% of the year’s heating-and-cooling load.
About 25 days a year reach 90°, and July afternoons average 86°.
The nicest months are April, May, June, September and October. 0.2 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →What a year in Divernon feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
14 inches of snow, 40 of rain and melt
May is the wettest month and February the driest. Rain or snow falls on about 110 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 205 frost-free days a year
In half of years the last 32° night comes by April 7 and the first by October 29.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Divernon and its neighbors
Ball has the coldest January nights next door (20°) and Bois D'Arc the hottest July afternoons (86°). Tap a town to see its climate.
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 Divernon averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.0°).
A smaller shift than in 73% of U.S. towns.
Change by month
How Divernon compares
Against every U.S. town on TownTapestry, each counted once, with its place in Illinois.
Divernon 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 36° | 20° | 2.2" | 5.6" | 9 | 21° – 39° |
| February | 41° | 24° | 2.0" | 4.0" | 8 | 20° – 42° |
| March | 52° | 33° | 2.9" | 1.1" | 10 | 35° – 57° |
| April | 65° | 42° | 4.3" | 0.2" | 11 | 47° – 60° |
| May | 75° | 53° | 4.7" | 0 | 12 | 59° – 73° |
| June | 83° | 62° | 4.5" | 0 | 10 | 68° – 76° |
| July | 86° | 65° | 3.8" | 0 | 9 | 71° – 83° |
| August | 85° | 63° | 3.6" | 0 | 7 | 69° – 80° |
| September | 79° | 55° | 3.2" | 0 | 8 | 62° – 72° |
| October | 67° | 44° | 3.2" | 0.1" | 9 | 51° – 61° |
| November | 52° | 34° | 3.2" | 0.5" | 9 | 35° – 50° |
| December | 40° | 25° | 2.3" | 2.4" | 9 | 19° – 42° |
| Year | 64° | 43° | 39.8" | 13.9" | 110 |
Heating and cooling a home in Divernon
79% of the work is heating.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 19° to 42°. June is the most reliable, staying within 8°.
Common questions about Divernon’s climate
What is the coldest month in Divernon?
January, with a typical high of 36° and a low of 20°.
What is the hottest month in Divernon?
July, with a typical high of 86° and a low of 65°. About 25 days a year reach 90°.
How much snow does Divernon get?
About 14 inches in a normal winter, most of it in January.
When is the first frost in Divernon?
In half of years the first 32° night comes by October 29, and the last spring frost by April 7.
What is the rainiest month in Divernon?
May, with 4.7 inches of rain and melted snow. The year totals 40 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Divernon.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Divernon itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Kincaid 3w, IL (11 mi, snow) and Virden, IL (7 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. Today’s forecast: National Weather Service.