Thebes, IL climate
Thebes has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 89°, a January night drops to 26°, and about 8 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Thebes feels like
Winter
Spring
Summer
Fall
Thebes 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 | 43° | 26° | 3.5" | 2.2" | 10 | 29° – 43° |
| February | 48° | 29° | 3.5" | 1.2" | 8 | 27° – 47° |
| March | 58° | 37° | 4.6" | 1.5" | 11 | 41° – 60° |
| April | 69° | 46° | 5.3" | 0 | 11 | 51° – 63° |
| May | 78° | 57° | 5.1" | 0 | 12 | 63° – 74° |
| June | 86° | 65° | 4.2" | 0 | 9 | 71° – 81° |
| July | 89° | 69° | 4.1" | 0 | 9 | 74° – 84° |
| August | 88° | 66° | 3.1" | 0 | 8 | 73° – 83° |
| September | 82° | 58° | 3.3" | 0 | 7 | 66° – 77° |
| October | 71° | 47° | 3.8" | 0.1" | 8 | 55° – 64° |
| November | 57° | 37° | 4.4" | 0.1" | 9 | 40° – 52° |
| December | 46° | 29° | 3.8" | 2.4" | 9 | 25° – 47° |
| Year | 68° | 47° | 48.7" | 7.5" | 111 |
“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 Thebes
Thebes gets 49 inches of rain and melted snow a year. April is the wettest month and August the driest. Rain or snow falls on about 111 days a year.
About 201 frost-free days a year
In half of years the last 32° night comes by April 5 and the first one by October 25. That leaves about 201 frost-free days for gardens, longer than 73% of U.S. towns.
Heating and cooling a home in Thebes
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Thebes, 73% of that work is heating and 27% 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 Thebes 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 Thebes averaged 1.0° warmer than the 1900s. The biggest change is in February (+2.0°). The shift is smaller than in 70% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Thebes’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 25° to 47°. October is the most reliable, staying within 9°.
Common questions about Thebes’s climate
What is the coldest month in Thebes?
January, with a typical high of 43° and a low of 26°.
What is the hottest month in Thebes?
July, with a typical high of 89° and a low of 69°. About 47 days a year reach 90°.
How much snow does Thebes get?
About 8 inches in a normal winter, most of it in December.
When is the first frost in Thebes?
In half of years the first 32° night comes by October 25, and the last spring frost by April 5.
What is the rainiest month in Thebes?
April, with 5.3 inches of rain and melted snow. The year totals 49 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Thebes itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Jackson, MO (17 mi, snow) and Cape Girardeau Municipal Airport, MO (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.