Climate Mattoon - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 35 | 40 | 51 | 64 | 75 | 84 |
| Average low in ºF Av. low Lo | 20 | 24 | 33 | 44 | 54 | 63 |
| Av. precipitation in inch Av. precip. Pre. | 2.26 | 2.14 | 2.71 | 4.01 | 4.17 | 4.11 |
| Av. snowfall in inch Snowfall Sn | 6 | 3 | 1 | 0 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 87 | 85 | 79 | 66 | 52 | 38 |
| Average low in ºF Av. low Lo | 67 | 65 | 57 | 46 | 35 | 24 |
| Av. precipitation in inch Av. precip. Pre. | 4.22 | 2.89 | 3.22 | 3.56 | 3.85 | 2.96 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 0 | 4 |
What is the average weather in Mattoon, Illinois?
Mattoon experiences a humid continental climate with very large seasonal temperature contrasts. Summers are hot and fairly wet, with precipitation spread relatively evenly throughout the year. Winters are cold and bring regular snowfall, making the cooler months the driest season.
Mattoon Climate Graph - Illinois Climate Chart
Daily normals Mattoon - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 35.8 | 22.3 | 0.10 | 0.10 | 0.10 | 0.10 |
| 2 Jan | 35.6 | 22.1 | 0.20 | 0.20 | 0.30 | 0.30 |
| 3 Jan | 35.4 | 21.9 | 0.29 | 0.29 | 0.40 | 0.40 |
| 4 Jan | 35.3 | 21.7 | 0.39 | 0.39 | 0.60 | 0.60 |
| 5 Jan | 35.1 | 21.5 | 0.49 | 0.49 | 0.70 | 0.70 |
| 6 Jan | 35.0 | 21.3 | 0.58 | 0.58 | 0.90 | 0.90 |
| 7 Jan | 34.9 | 21.1 | 0.68 | 0.68 | 1.10 | 1.10 |
| 8 Jan | 34.8 | 20.9 | 0.77 | 0.77 | 1.20 | 1.20 |
| 9 Jan | 34.7 | 20.8 | 0.86 | 0.86 | 1.40 | 1.40 |
| 10 Jan | 34.6 | 20.6 | 0.96 | 0.96 | 1.50 | 1.50 |
| 11 Jan | 34.5 | 20.4 | 1.04 | 1.04 | 1.70 | 1.70 |
| 12 Jan | 34.5 | 20.3 | 1.13 | 1.13 | 1.80 | 1.80 |
| 13 Jan | 34.4 | 20.1 | 1.21 | 1.21 | 2.00 | 2.00 |
| 14 Jan | 34.4 | 20.0 | 1.29 | 1.29 | 2.20 | 2.20 |
| 15 Jan | 34.3 | 19.8 | 1.38 | 1.38 | 2.30 | 2.30 |
| 16 Jan | 34.3 | 19.7 | 1.46 | 1.46 | 2.50 | 2.50 |
| 17 Jan | 34.3 | 19.6 | 1.55 | 1.55 | 2.70 | 2.70 |
| 18 Jan | 34.3 | 19.5 | 1.63 | 1.63 | 2.90 | 2.90 |
| 19 Jan | 34.3 | 19.4 | 1.71 | 1.71 | 3.10 | 3.10 |
| 20 Jan | 34.4 | 19.4 | 1.79 | 1.79 | 3.30 | 3.30 |
| 21 Jan | 34.4 | 19.3 | 1.87 | 1.87 | 3.50 | 3.50 |
| 22 Jan | 34.5 | 19.3 | 1.94 | 1.94 | 3.70 | 3.70 |
| 23 Jan | 34.5 | 19.3 | 2.02 | 2.02 | 3.90 | 3.90 |
| 24 Jan | 34.6 | 19.3 | 2.10 | 2.10 | 4.10 | 4.10 |
| 25 Jan | 34.7 | 19.3 | 2.18 | 2.18 | 4.30 | 4.30 |
| 26 Jan | 34.8 | 19.3 | 2.25 | 2.25 | 4.40 | 4.40 |
| 27 Jan | 35.0 | 19.4 | 2.33 | 2.33 | 4.60 | 4.60 |
| 28 Jan | 35.1 | 19.5 | 2.40 | 2.40 | 4.80 | 4.80 |
| 29 Jan | 35.2 | 19.5 | 2.47 | 2.47 | 4.90 | 4.90 |
| 30 Jan | 35.4 | 19.6 | 2.54 | 2.54 | 5.10 | 5.10 |
| 31 Jan | 35.6 | 19.8 | 2.61 | 2.61 | 5.20 | 5.20 |
Weather history Mattoon - September 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Sep | - | - | 0.00 | 0.00 | 0.0 |
| 02 Sep | - | - | 0.00 | 0.00 | 0.0 |
| 03 Sep | - | - | 0.00 | 0.00 | 0.0 |
| 04 Sep | - | - | 0.00 | 0.00 | 0.0 |
| 05 Sep | - | - | 0.00 | 0.00 | 0.0 |
| 06 Sep | - | - | 0.00 | 0.00 | 0.0 |
| 07 Sep | - | - | - | - | - |
| 08 Sep | - | - | - | - | - |
| 09 Sep | - | - | - | - | - |
| 10 Sep | - | - | - | - | - |
| 11 Sep | - | - | - | - | - |
| 12 Sep | - | - | - | - | - |
| 13 Sep | - | - | - | - | - |
| 14 Sep | - | - | - | - | - |
| 15 Sep | - | - | - | - | - |
| 16 Sep | - | - | - | - | - |
| 17 Sep | - | - | - | - | - |
| 18 Sep | - | - | - | - | - |
| 19 Sep | - | - | - | - | - |
| 20 Sep | - | - | - | - | - |
| 21 Sep | - | - | - | - | - |
| 22 Sep | - | - | - | - | - |
| 23 Sep | - | - | - | - | - |
| 24 Sep | - | - | - | - | - |
| 25 Sep | - | - | - | - | - |
| 26 Sep | - | - | - | - | - |
| 27 Sep | - | - | - | - | - |
| 28 Sep | - | - | - | - | - |
| 29 Sep | - | - | - | - | - |
| 30 Sep | - | - | - | - | - |
Past weather Mattoon
| Sep 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | - ºF | 35 ºF | |
| Average low temperature Av. low temp. | - ºF | 20 ºF | |
| Total precipitation Total precip. | 0.00 inch | 2.26 inch | |
| Total snowfall Total snowfall | 0.00 inch | 6 inch | |
| Highest max temperature Highest max temp. | - ºF | - | |
| Lowest max temperature Lowest max temp. | - ºF | - | |
| Highest min temperature Highest min temp. | - ºF | - | |
| Lowest min temperature Lowest min temp. | - ºF | - | |
Past weather September 2026 incomplete - Missing data
Geo Mattoon - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | Coles | |
| City | Mattoon | |
| Zip Code | 61938 | |
| Longitude | -88.28 dec. degr. | |
| Latitude | 39.48 dec. degr. | |
| Altitude - Elevation | 712ft | |
| ICAO | - | |
| IATA | - |
Date and Time Mattoon - Illinois
| Local Time | 02:10 PM | |
|---|---|---|
| Sunrise | 06:27 AM | |
| Sunset | 07:12 PM | |
| Day/Night | Day | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Mattoon - Illinois
USGS National Map — Open interactive map
Mattoon weather averages
| Annual high temperature | 63ºF |
| Annual low temperature | 44ºF |
| Average annual precip. | 40.1 inch |
| Av. annual snowfall | 14 inch |
Station Data
Monthly averages Mattoon
Longitude: -88.2792, Latitude: 39.4779
Average weather Mattoon, IL - 61938
Monthly: 1991-2020 normals
History: 2007-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...