Climate Simpson - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 44 | 49 | 60 | 70 | 78 | 86 |
| Average low in ºF Av. low Lo | 27 | 30 | 38 | 47 | 56 | 64 |
| Av. precipitation in inch Av. precip. Pre. | 3.62 | 3.51 | 4.37 | 4.56 | 5.57 | 4.07 |
| Av. snowfall in inch Snowfall Sn | 3 | 3 | 1 | 0 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 89 | 89 | 83 | 72 | 59 | 47 |
| Average low in ºF Av. low Lo | 68 | 66 | 58 | 48 | 39 | 30 |
| Av. precipitation in inch Av. precip. Pre. | 3.86 | 3.29 | 3.54 | 3.89 | 4.51 | 4.49 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 0 | 2 |
What is the average weather in Simpson, Illinois?
Simpson, Illinois, experiences a humid subtropical climate with strong seasonal contrasts. Summers are hot, and while rainfall is spread fairly evenly, heavy downpours or afternoon thunderstorms can occur during warmer months. Winters are cold, bringing occasional snowfall. The area is fairly wet overall, with spring being the wettest season.
Simpson Climate Graph - Illinois Climate Chart
Daily normals Simpson - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 43.9 | 26.9 | 0.12 | 0.12 | 0.00 | 0.00 |
| 2 Jan | 43.9 | 26.8 | 0.24 | 0.24 | 0.12 | 0.30 |
| 3 Jan | 43.9 | 26.7 | 0.35 | 0.35 | 0.20 | 0.50 |
| 4 Jan | 43.8 | 26.7 | 0.47 | 0.47 | 0.20 | 0.50 |
| 5 Jan | 43.8 | 26.6 | 0.59 | 0.59 | 0.31 | 0.80 |
| 6 Jan | 43.8 | 26.6 | 0.71 | 0.71 | 0.39 | 1.00 |
| 7 Jan | 43.8 | 26.5 | 0.83 | 0.83 | 0.51 | 1.30 |
| 8 Jan | 43.8 | 26.5 | 0.94 | 0.94 | 0.51 | 1.30 |
| 9 Jan | 43.8 | 26.5 | 1.06 | 1.06 | 0.59 | 1.50 |
| 10 Jan | 43.8 | 26.5 | 1.14 | 1.14 | 0.71 | 1.80 |
| 11 Jan | 43.8 | 26.4 | 1.30 | 1.30 | 0.79 | 2.00 |
| 12 Jan | 43.8 | 26.4 | 1.38 | 1.38 | 0.79 | 2.00 |
| 13 Jan | 43.9 | 26.4 | 1.50 | 1.50 | 0.91 | 2.30 |
| 14 Jan | 43.9 | 26.4 | 1.61 | 1.61 | 0.98 | 2.50 |
| 15 Jan | 44.0 | 26.4 | 1.73 | 1.73 | 1.10 | 2.80 |
| 16 Jan | 44.0 | 26.4 | 1.85 | 1.85 | 1.18 | 3.00 |
| 17 Jan | 44.1 | 26.5 | 1.97 | 1.97 | 1.18 | 3.00 |
| 18 Jan | 44.1 | 26.5 | 2.09 | 2.09 | 1.30 | 3.30 |
| 19 Jan | 44.2 | 26.5 | 2.17 | 2.17 | 1.42 | 3.60 |
| 20 Jan | 44.3 | 26.6 | 2.28 | 2.28 | 1.50 | 3.80 |
| 21 Jan | 44.4 | 26.6 | 2.40 | 2.40 | 1.61 | 4.10 |
| 22 Jan | 44.5 | 26.7 | 2.52 | 2.52 | 1.69 | 4.30 |
| 23 Jan | 44.6 | 26.7 | 2.64 | 2.64 | 1.81 | 4.60 |
| 24 Jan | 44.7 | 26.8 | 2.76 | 2.76 | 1.81 | 4.60 |
| 25 Jan | 44.8 | 26.9 | 2.87 | 2.87 | 1.89 | 4.80 |
| 26 Jan | 44.9 | 26.9 | 2.99 | 2.99 | 2.01 | 5.10 |
| 27 Jan | 45.1 | 27.0 | 3.11 | 3.11 | 2.09 | 5.30 |
| 28 Jan | 45.2 | 27.1 | 3.23 | 3.23 | 2.20 | 5.60 |
| 29 Jan | 45.4 | 27.2 | 3.35 | 3.35 | 2.28 | 5.80 |
| 30 Jan | 45.5 | 27.4 | 3.50 | 3.50 | 2.40 | 6.10 |
| 31 Jan | 45.7 | 27.5 | 3.62 | 3.62 | 2.52 | 6.40 |
Weather history Simpson - May 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 May | 63.0 | 48.0 | - | - | - |
| 02 May | 61.0 | 39.0 | - | - | - |
| 03 May | 70.0 | 34.0 | - | - | - |
| 04 May | 80.1 | 52.0 | - | - | - |
| 05 May | 79.0 | 55.9 | - | 0.00 | 0.0 |
| 06 May | 60.1 | 44.1 | 0.98 | 0.00 | 0.0 |
| 07 May | 64.9 | 39.9 | - | - | - |
| 08 May | 73.0 | 39.0 | - | - | - |
| 09 May | 79.0 | 51.1 | - | - | - |
| 10 May | 79.0 | 52.0 | - | - | - |
| 11 May | 73.0 | 46.0 | - | - | - |
| 12 May | 78.1 | 45.0 | - | - | - |
| 13 May | 79.0 | 55.0 | - | - | - |
| 14 May | 73.0 | 46.0 | - | - | - |
| 15 May | 82.0 | 50.0 | - | - | - |
| 16 May | 79.0 | 68.0 | - | - | - |
| 17 May | 84.9 | 66.9 | - | - | - |
| 18 May | 86.0 | 71.1 | - | - | - |
| 19 May | 86.0 | 64.0 | - | - | - |
| 20 May | 84.0 | 59.0 | - | - | - |
| 21 May | 64.0 | 57.9 | - | 0.00 | 0.0 |
| 22 May | 64.9 | 60.1 | - | - | - |
| 23 May | 71.1 | 62.1 | - | - | - |
| 24 May | 77.0 | 62.1 | - | - | - |
| 25 May | 77.0 | 60.1 | - | - | - |
| 26 May | 77.0 | 66.0 | - | 0.00 | 0.0 |
| 27 May | 84.0 | 66.9 | - | - | - |
| 28 May | 84.9 | 64.0 | - | - | - |
| 29 May | 82.9 | 66.9 | - | 0.00 | 0.0 |
| 30 May | 82.9 | 66.9 | - | - | - |
| 31 May | 82.9 | 64.9 | - | - | - |
Past weather Simpson
| May 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 76.2 ºF | 44 ºF | |
| Average low temperature Av. low temp. | 55.6 ºF | 27 ºF | |
| Total precipitation Total precip. | - inch | 3.62 inch | |
| Total snowfall Total snowfall | - inch | 3 inch | |
| Highest max temperature Highest max temp. | 86.0 ºF | - | |
| Lowest max temperature Lowest max temp. | 60.1 ºF | - | |
| Highest min temperature Highest min temp. | 71.1 ºF | - | |
| Lowest min temperature Lowest min temp. | 34.0 ºF | - | |
Past weather May 2026 incomplete - Missing data
Geo Simpson - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | - | |
| City | Simpson | |
| Zip Code | 62985 | |
| Longitude | -88.76 dec. degr. | |
| Latitude | 37.47 dec. degr. | |
| Altitude - Elevation | 476ft | |
| ICAO | - | |
| IATA | - |
Date and Time Simpson - Illinois
| Local Time | 12:19 PM | |
|---|---|---|
| Sunrise | 05:37 AM | |
| Sunset | 08:21 PM | |
| Day/Night | Day | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Simpson - Illinois
USGS National Map — Open interactive map
Simpson weather averages
| Annual high temperature | 69ºF |
| Annual low temperature | 48ºF |
| Average annual precip. | 49.28 inch |
| Av. annual snowfall | 9 inch |
Station Data
Monthly averages Simpson
Longitude: -88.7551, Latitude: 37.4673
Average weather Simpson, IL - 62985
Monthly: 1991-2020 normals
History: 2008-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...