Jonathan Creek, IL climate
Jonathan Creek has chilly winters and warm summers. A typical July afternoon reaches 86°, a January night drops to 20°, and about 15 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Jonathan Creek feels like
Winter
Spring
Summer
Fall
Jonathan 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 35° | 20° | 2.4" | 4.0" | 8 | 20° – 39° |
| February | 40° | 23° | 2.0" | 4.3" | 9 | 20° – 42° |
| March | 52° | 32° | 2.8" | 1.3" | 10 | 35° – 56° |
| April | 64° | 42° | 4.4" | 0.3" | 10 | 45° – 59° |
| May | 74° | 53° | 4.4" | 0 | 13 | 58° – 72° |
| June | 83° | 62° | 4.6" | 0 | 11 | 68° – 76° |
| July | 86° | 65° | 4.2" | 0 | 9 | 70° – 82° |
| August | 85° | 63° | 3.1" | 0 | 8 | 69° – 79° |
| September | 79° | 55° | 3.0" | 0 | 7 | 62° – 72° |
| October | 67° | 44° | 3.4" | 0 | 10 | 51° – 60° |
| November | 52° | 33° | 3.4" | 0.5" | 9 | 35° – 50° |
| December | 40° | 25° | 2.4" | 4.7" | 10 | 18° – 41° |
| Year | 63° | 43° | 40.0" | 15.1" | 112 |
“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 Jonathan Creek
Jonathan Creek gets 40 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 112 days a year.
About 187 frost-free days a year
In half of years the last 32° night comes by April 15 and the first one by October 22. That leaves about 187 frost-free days for gardens, longer than 60% of U.S. towns.
Heating and cooling a home in Jonathan Creek
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Jonathan Creek, 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.
Jonathan Creek and its neighbors
Jonathan Creek borders 5 towns with climate data. January nights across them vary by 0.5°. Lowe has the coldest January nights (19°) and East Nelson the hottest July afternoons (86°). Jonathan Creek’s January low is 20° and its July high 86°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Jonathan Creek 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 Jonathan Creek averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.2°). The shift is smaller than in 59% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Jonathan Creek’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 18° to 41°. June is the most reliable, staying within 8°.
Common questions about Jonathan Creek’s climate
What is the coldest month in Jonathan Creek?
January, with a typical high of 35° and a low of 20°.
What is the hottest month in Jonathan Creek?
July, with a typical high of 86° and a low of 65°. About 22 days a year reach 90°.
How much snow does Jonathan Creek get?
About 15 inches in a normal winter, most of it in December.
When is the first frost in Jonathan Creek?
In half of years the first 32° night comes by October 22, and the last spring frost by April 15.
What is the rainiest month in Jonathan Creek?
June, with 4.6 inches of rain and melted snow. The year totals 40 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Jonathan Creek itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lovington, IL (7 mi, snow) and Sullivan 3s, 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.