Precipitation in Thebes tops that of 79% of U.S. towns: 49 inches a year
Midwinter brings lows of about 26°. Summer afternoons here are warmer than in 73% of U.S. towns. The latest 30-year average runs 1.0° warmer than 1901–2000’s, with February up the most. Keep the boiler serviced for the months from November to March, which average under 50°.
A year in Thebes at a glance
Each month’s typical high and low, and what it brings.
What stands out about Thebes’ climate
Compared with towns across the U.S., with Thebes’ place in Illinois beside it.
What a year in Thebes feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 201 frost-free days a year
In half of years the last 32° night comes by April 5 and the first by October 25. Frost and day counts come from NOAA’s station at Cape Girardeau Muni Airport, 7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Thebes’ center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 3°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 8 inches of snow a winter
Snow, measured at Jackson, MO, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 49 inches a year; April is the wettest month and August the driest. Rain or snow falls on about 111 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Thebes
73% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Cape Girardeau Muni Airport.
Living with Thebes’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
201 frost-free days in zone 7a. The last frost comes by Apr 5 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 25.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October. 1.8 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Thebes from natural hazards, river flooding is the largest share (43%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Thebes and similar climates
TownRatings has no climate map of the towns around Thebes yet.
Climates most like Thebes’, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Thebes, IL | 26° | 89° | 49" | 7.5" |
| Springdale, AR | 26° | 89° | 48" | 6.5" |
| Neosho, MO | 25° | 90° | 47" | 8.1" |
| Bon Air, VA | 28° | 89° | 47" | 8.8" |
| Salisbury, MD | 27° | 89° | 46" | 8.0" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
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°).
A smaller shift than in 77% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Thebes compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Thebes’ place among Illinois’.
Thebes weather by month
Highs, lows and precipitation from NOAA’s grid at Thebes’ center; snow, wet days and snow on the ground from Jackson, MO. 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" | 0.0" | 11 | 51° – 63° |
| May | 78° | 57° | 5.1" | 0.0" | 12 | 63° – 74° |
| June | 86° | 65° | 4.2" | 0.0" | 9 | 71° – 81° |
| July | 89° | 69° | 4.1" | 0.0" | 9 | 74° – 84° |
| August | 88° | 66° | 3.1" | 0.0" | 8 | 73° – 83° |
| September | 82° | 58° | 3.3" | 0.0" | 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 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 25° to 47°. October is the most reliable, staying within 9°.
Where Thebes’ numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Thebes’ center.
- Snow: Jackson, MO.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Cape Girardeau Muni Airport, 7 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Thebes’ climate
What is the weather like in Thebes?
A typical July afternoon reaches 89°, a January night drops to 26°, and about 8 inches of snow falls in a normal winter. Milder January nights than 66% of U.S. towns; hotter July afternoons than 73% of U.S. towns.
How cold does it get in Thebes in winter?
January nights average 26°. About 90 nights a year reach 32° or below and 1 reach 0° or below. In the coldest January of the last 30 years the month averaged 29°.
How much snow does Thebes get?
About 7.5 inches in a normal winter at Jackson, MO, most of it in January and December.
How hot does it get in Thebes?
July, with a typical high of 89° and a low of 69°. About 47 days a year reach 90° and 1 reach 100° (Cape Girardeau Muni Airport).
When is the first and last frost in Thebes?
In half of years the last spring frost (32°) comes by April 5 and the first fall frost by October 25, about 201 frost-free days, at Cape Girardeau Muni Airport.
What growing zone is Thebes in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 3°.
What is the best time of year to visit Thebes?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Thebes getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 77% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Thebes.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.