Climate Geneseo - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 31 | 35 | 48 | 62 | 73 | 82 |
| Average low in ºF Av. low Lo | 15 | 19 | 29 | 40 | 51 | 61 |
| Av. precipitation in inch Av. precip. Pre. | 1.42 | 1.62 | 2.69 | 3.66 | 4.20 | 4.06 |
| Av. snowfall in inch Snowfall Sn | 8 | 5 | 2 | 1 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 85 | 83 | 76 | 63 | 48 | 34 |
| Average low in ºF Av. low Lo | 65 | 63 | 54 | 43 | 31 | 19 |
| Av. precipitation in inch Av. precip. Pre. | 4.05 | 4.41 | 3.35 | 3.38 | 2.80 | 2.17 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 1 | 8 |
What is the average weather in Geneseo, Illinois?
Geneseo experiences a humid continental climate, marked by a very large seasonal temperature contrast. Summers are warm and bring the wettest conditions, with precipitation peaking in August. Winters are cold and see regular snowfall, contributing to the fairly wet annual precipitation that is spread relatively evenly throughout the year.
Geneseo Climate Graph - Illinois Climate Chart
Daily normals Geneseo - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 31.8 | 16.6 | 0.05 | 0.05 | 0.30 | 0.30 |
| 2 Jan | 31.6 | 16.3 | 0.11 | 0.11 | 0.50 | 0.50 |
| 3 Jan | 31.5 | 16.1 | 0.16 | 0.16 | 0.80 | 0.80 |
| 4 Jan | 31.4 | 15.9 | 0.22 | 0.22 | 1.10 | 1.10 |
| 5 Jan | 31.2 | 15.7 | 0.27 | 0.27 | 1.40 | 1.40 |
| 6 Jan | 31.1 | 15.5 | 0.33 | 0.33 | 1.70 | 1.70 |
| 7 Jan | 31.0 | 15.4 | 0.39 | 0.39 | 2.00 | 2.00 |
| 8 Jan | 30.9 | 15.2 | 0.44 | 0.44 | 2.30 | 2.30 |
| 9 Jan | 30.8 | 15.0 | 0.50 | 0.50 | 2.60 | 2.60 |
| 10 Jan | 30.7 | 14.8 | 0.55 | 0.55 | 2.90 | 2.90 |
| 11 Jan | 30.6 | 14.7 | 0.61 | 0.61 | 3.20 | 3.20 |
| 12 Jan | 30.5 | 14.5 | 0.66 | 0.66 | 3.60 | 3.60 |
| 13 Jan | 30.5 | 14.4 | 0.71 | 0.71 | 3.90 | 3.90 |
| 14 Jan | 30.4 | 14.3 | 0.77 | 0.77 | 4.20 | 4.20 |
| 15 Jan | 30.4 | 14.2 | 0.82 | 0.82 | 4.50 | 4.50 |
| 16 Jan | 30.4 | 14.1 | 0.87 | 0.87 | 4.80 | 4.80 |
| 17 Jan | 30.4 | 14.0 | 0.92 | 0.92 | 5.20 | 5.20 |
| 18 Jan | 30.3 | 13.9 | 0.97 | 0.97 | 5.50 | 5.50 |
| 19 Jan | 30.3 | 13.9 | 1.03 | 1.03 | 5.80 | 5.80 |
| 20 Jan | 30.4 | 13.8 | 1.08 | 1.08 | 6.20 | 6.20 |
| 21 Jan | 30.4 | 13.8 | 1.13 | 1.13 | 6.50 | 6.50 |
| 22 Jan | 30.4 | 13.8 | 1.18 | 1.18 | 6.80 | 6.80 |
| 23 Jan | 30.5 | 13.8 | 1.23 | 1.23 | 7.20 | 7.20 |
| 24 Jan | 30.5 | 13.8 | 1.29 | 1.29 | 7.50 | 7.50 |
| 25 Jan | 30.6 | 13.9 | 1.34 | 1.34 | 7.80 | 7.80 |
| 26 Jan | 30.7 | 13.9 | 1.39 | 1.39 | 8.20 | 8.20 |
| 27 Jan | 30.8 | 14.0 | 1.44 | 1.44 | 8.50 | 8.50 |
| 28 Jan | 30.9 | 14.1 | 1.49 | 1.49 | 8.80 | 8.80 |
| 29 Jan | 31.1 | 14.2 | 1.54 | 1.54 | 9.20 | 9.20 |
| 30 Jan | 31.2 | 14.3 | 1.59 | 1.59 | 9.50 | 9.50 |
| 31 Jan | 31.4 | 14.5 | 1.64 | 1.64 | 9.80 | 9.80 |
Weather history Geneseo - September 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Sep | 93.9 | 75.9 | 0.00 | - | - |
| 02 Sep | 95.0 | 75.0 | 0.00 | - | - |
| 03 Sep | 95.0 | 75.9 | 0.00 | - | - |
| 04 Sep | 96.1 | 75.9 | 0.00 | - | - |
| 05 Sep | 93.0 | 73.0 | 0.00 | - | - |
| 06 Sep | 84.0 | 66.9 | 0.00 | - | - |
| 07 Sep | 81.0 | 57.9 | 0.00 | - | - |
| 08 Sep | 88.0 | 62.1 | 0.00 | - | - |
| 09 Sep | 80.1 | 69.1 | 0.90 | - | - |
| 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 Geneseo
| Sep 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 89.6 ºF | 31 ºF | |
| Average low temperature Av. low temp. | 70.2 ºF | 15 ºF | |
| Total precipitation Total precip. | 0.90 inch | 1.42 inch | |
| Total snowfall Total snowfall | - inch | 8 inch | |
| Highest max temperature Highest max temp. | 96.1 ºF | - | |
| Lowest max temperature Lowest max temp. | 80.1 ºF | - | |
| Highest min temperature Highest min temp. | 75.9 ºF | - | |
| Lowest min temperature Lowest min temp. | 57.9 ºF | - | |
Past weather September 2026 incomplete - Missing data
Geo Geneseo - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | Henry | |
| City | Geneseo | |
| Zip Code | 61254 | |
| Longitude | -90.11 dec. degr. | |
| Latitude | 41.44 dec. degr. | |
| Altitude - Elevation | 643ft | |
| ICAO | - | |
| IATA | - |
Date and Time Geneseo - Illinois
| Local Time | 09:06 AM | |
|---|---|---|
| Sunrise | 06:36 AM | |
| Sunset | 07:16 PM | |
| Day/Night | Day | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Geneseo - Illinois
USGS National Map — Open interactive map
Geneseo weather averages
| Annual high temperature | 60ºF |
| Annual low temperature | 41ºF |
| Average annual precip. | 37.81 inch |
| Av. annual snowfall | 25 inch |
Station Data
Monthly averages Geneseo
Longitude: -90.1101, Latitude: 41.4398
Average weather Geneseo, IL - 61254
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, ...