Climate Fairfield - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 39 | 44 | 55 | 67 | 76 | 85 |
| Average low in ºF Av. low Lo | 22 | 25 | 34 | 44 | 53 | 62 |
| Av. precipitation in inch Av. precip. Pre. | 3.03 | 2.78 | 4.39 | 4.35 | 4.97 | 3.81 |
| Av. snowfall in inch Snowfall Sn | 3 | 4 | 2 | 0 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 88 | 87 | 80 | 69 | 55 | 42 |
| Average low in ºF Av. low Lo | 65 | 63 | 55 | 44 | 35 | 25 |
| Av. precipitation in inch Av. precip. Pre. | 3.62 | 3.15 | 2.62 | 3.88 | 4.17 | 3.49 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 0 | 4 |
What is the average weather in Fairfield, Illinois?
Fairfield experiences a humid continental climate, marked by a very large seasonal temperature contrast. Summers are hot, while winters are cold and bring regular snowfall. Precipitation is fairly wet overall and spread relatively evenly throughout the year, with winter moisture often arriving as snow.
Fairfield Climate Graph - Illinois Climate Chart
Daily normals Fairfield - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 41.4 | 25.9 | 0.12 | 0.12 | 0.00 | 0.00 |
| 2 Jan | 41.3 | 25.7 | 0.24 | 0.24 | 0.00 | 0.00 |
| 3 Jan | 41.1 | 25.6 | 0.35 | 0.35 | 0.00 | 0.00 |
| 4 Jan | 41.0 | 25.4 | 0.47 | 0.47 | 0.00 | 0.00 |
| 5 Jan | 40.9 | 25.3 | 0.59 | 0.59 | 0.00 | 0.00 |
| 6 Jan | 40.8 | 25.1 | 0.70 | 0.70 | 0.00 | 0.00 |
| 7 Jan | 40.8 | 25.0 | 0.82 | 0.82 | 0.00 | 0.00 |
| 8 Jan | 40.7 | 24.8 | 0.93 | 0.93 | 0.00 | 0.00 |
| 9 Jan | 40.6 | 24.7 | 1.04 | 1.04 | 0.00 | 0.00 |
| 10 Jan | 40.6 | 24.6 | 1.16 | 1.16 | 0.00 | 0.00 |
| 11 Jan | 40.6 | 24.5 | 1.27 | 1.27 | 0.00 | 0.00 |
| 12 Jan | 40.5 | 24.4 | 1.38 | 1.38 | 0.00 | 0.00 |
| 13 Jan | 40.5 | 24.3 | 1.50 | 1.50 | 0.00 | 0.00 |
| 14 Jan | 40.6 | 24.2 | 1.61 | 1.61 | 0.00 | 0.00 |
| 15 Jan | 40.6 | 24.1 | 1.72 | 1.72 | 0.00 | 0.00 |
| 16 Jan | 40.6 | 24.1 | 1.83 | 1.83 | 0.00 | 0.00 |
| 17 Jan | 40.7 | 24.0 | 1.95 | 1.95 | 0.00 | 0.00 |
| 18 Jan | 40.7 | 24.0 | 2.06 | 2.06 | 0.00 | 0.00 |
| 19 Jan | 40.8 | 23.9 | 2.17 | 2.17 | 0.00 | 0.00 |
| 20 Jan | 40.9 | 23.9 | 2.27 | 2.27 | 0.00 | 0.00 |
| 21 Jan | 41.0 | 23.9 | 2.36 | 2.36 | 0.00 | 0.00 |
| 22 Jan | 41.1 | 23.9 | 2.47 | 2.47 | 0.00 | 0.00 |
| 23 Jan | 41.2 | 24.0 | 2.57 | 2.57 | 0.00 | 0.00 |
| 24 Jan | 41.3 | 24.0 | 2.68 | 2.68 | 0.00 | 0.00 |
| 25 Jan | 41.5 | 24.1 | 2.78 | 2.78 | 0.00 | 0.00 |
| 26 Jan | 41.6 | 24.1 | 2.87 | 2.87 | 0.00 | 0.00 |
| 27 Jan | 41.8 | 24.2 | 2.97 | 2.97 | 0.00 | 0.00 |
| 28 Jan | 42.0 | 24.3 | 3.06 | 3.06 | 0.00 | 0.00 |
| 29 Jan | 42.2 | 24.4 | 3.15 | 3.15 | 0.00 | 0.00 |
| 30 Jan | 42.3 | 24.5 | 3.24 | 3.24 | 0.00 | 0.00 |
| 31 Jan | 42.6 | 24.7 | 3.33 | 3.33 | 0.00 | 0.00 |
Weather history Fairfield - September 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Sep | 97.0 | 73.9 | 0.00 | 0.00 | 0.0 |
| 02 Sep | 99.0 | 73.9 | 0.00 | 0.00 | 0.0 |
| 03 Sep | 100.0 | 75.0 | 0.00 | 0.00 | 0.0 |
| 04 Sep | 100.0 | 73.9 | 0.00 | 0.00 | 0.0 |
| 05 Sep | 100.9 | 73.9 | 0.00 | 0.00 | 0.0 |
| 06 Sep | 102.9 | 72.0 | 0.00 | 0.00 | 0.0 |
| 07 Sep | 90.0 | 62.1 | 0.00 | 0.00 | 0.0 |
| 08 Sep | 87.1 | 61.0 | 0.00 | 0.00 | 0.0 |
| 09 Sep | 95.0 | 60.1 | 0.00 | 0.00 | 0.0 |
| 10 Sep | 93.9 | 71.1 | 0.88 | 0.00 | 0.0 |
| 11 Sep | 79.0 | 69.1 | 0.11 | 0.00 | 0.0 |
| 12 Sep | 81.0 | 69.1 | 0.08 | 0.00 | 0.0 |
| 13 Sep | 91.0 | 69.1 | 0.00 | 0.00 | 0.0 |
| 14 Sep | 89.1 | 61.0 | 0.00 | 0.00 | 0.0 |
| 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 Fairfield
| Sep 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 93.3 ºF | 39 ºF | |
| Average low temperature Av. low temp. | 68.9 ºF | 22 ºF | |
| Total precipitation Total precip. | 1.07 inch | 3.03 inch | |
| Total snowfall Total snowfall | 0.00 inch | 3 inch | |
| Highest max temperature Highest max temp. | 102.9 ºF | - | |
| Lowest max temperature Lowest max temp. | 79.0 ºF | - | |
| Highest min temperature Highest min temp. | 75.0 ºF | - | |
| Lowest min temperature Lowest min temp. | 60.1 ºF | - | |
Past weather September 2026 incomplete - Missing data
Geo Fairfield - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | Wayne | |
| City | Fairfield | |
| Zip Code | 62837 | |
| Longitude | -88.41 dec. degr. | |
| Latitude | 38.38 dec. degr. | |
| Altitude - Elevation | 427ft | |
| ICAO | - | |
| IATA | - |
Date and Time Fairfield - Illinois
| Local Time | 03:23 PM | |
|---|---|---|
| Sunrise | 06:37 AM | |
| Sunset | 06:56 PM | |
| Day/Night | Day | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Fairfield - Illinois
USGS National Map — Open interactive map
Fairfield weather averages
| Annual high temperature | 66ºF |
| Annual low temperature | 44ºF |
| Average annual precip. | 44.26 inch |
| Av. annual snowfall | 13 inch |
Station Data
Monthly averages Fairfield
Longitude: -88.4127, Latitude: 38.3786
Average weather Fairfield, IL - 62837
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, ...