Deer Creek has chilly winters and warm summers
A typical July afternoon reaches 85°, a January night drops to 17°, and about 22 inches of snow falls in a normal winter.
A year in Deer Creek at a glance
Each month’s typical high and low, and what it brings.
What stands out about Deer Creek’s climate
Read from where Deer Creek sits among Illinois’s towns. The page puts what stands out first.
Warmer than it used to be
The last 30 years in Deer Creek averaged 1.6° warmer than the 1900s. The biggest change is in December (+2.8°).
A bigger shift than in 73% of U.S. towns.
Change by month
What a year in Deer Creek feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
22 inches of snow, 38 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 178 frost-free days a year
In half of years the last 32° night comes by April 21 and the first by October 17.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Deer Creek’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
178 frost-free days. The last frost comes by Apr 21 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 17.
About 22" a winter over 8 days with an inch or more, most in January. Snow covers the ground about 41 days a year.
Months averaging under 55° run from October through April. Heating is 84% of the year’s heating-and-cooling load.
About 24 days a year reach 90°, and July afternoons average 85°.
The nicest months are May, June, August, September and October.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →How Deer Creek compares
Against every U.S. town on TownTapestry, each counted once, with its place in Illinois.
Deer Creek 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" | 6.8" | 9 | 16 | 18° – 37° |
| February | 38° | 21° | 1.9" | 5.2" | 7 | 10 | 16° – 41° |
| March | 50° | 30° | 2.6" | 2.8" | 9 | 4 | 32° – 55° |
| April | 63° | 40° | 3.8" | 0.8" | 11 | 0 | 44° – 58° |
| May | 74° | 51° | 4.6" | 0 | 12 | 0 | 56° – 71° |
| June | 83° | 61° | 4.2" | 0 | 10 | 0 | 67° – 75° |
| July | 85° | 64° | 4.2" | 0 | 9 | 0 | 69° – 81° |
| August | 83° | 62° | 3.7" | 0 | 9 | 0 | 67° – 78° |
| September | 78° | 54° | 3.3" | 0 | 7 | 0 | 60° – 71° |
| October | 65° | 43° | 3.2" | 0 | 10 | 0 | 49° – 59° |
| November | 50° | 32° | 2.7" | 1.5" | 8 | 2 | 33° – 50° |
| December | 38° | 22° | 2.2" | 5.2" | 8 | 9 | 16° – 40° |
| Year | 62° | 41° | 38.4" | 22.3" | 110 | 41 |
Heating and cooling a home in Deer Creek
84% of the work is heating, so the furnace matters far more than the air conditioner.
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. February swings the most: from 1991 to 2020 its average ranged from 16° to 41°. June is the most reliable, staying within 8°.
Common questions about Deer Creek’s climate
What is the coldest month in Deer Creek?
January, with a typical high of 33° and a low of 17°.
What is the hottest month in Deer Creek?
July, with a typical high of 85° and a low of 64°. About 24 days a year reach 90°.
How much snow does Deer Creek get?
About 22 inches in a normal winter, most of it in January.
When is the first frost in Deer Creek?
In half of years the first 32° night comes by October 17, and the last spring frost by April 21.
What is the rainiest month in Deer Creek?
May, with 4.6 inches of rain and melted snow. The year totals 38 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Deer Creek.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Deer Creek itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Congerville 2nw, IL (5 mi) away. 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.