Climate Sullivan - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 35 | 39 | 50 | 63 | 73 | 83 |
| Average low in ºF Av. low Lo | 18 | 21 | 31 | 40 | 51 | 61 |
| Av. precipitation in inch Av. precip. Pre. | 2.38 | 2.18 | 2.59 | 3.67 | 4.50 | 4.44 |
| 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 | 85 | 85 | 77 | 66 | 51 | 38 |
| Average low in ºF Av. low Lo | 65 | 61 | 53 | 42 | 32 | 22 |
| Av. precipitation in inch Av. precip. Pre. | 4.34 | 3.06 | 2.61 | 3.25 | 3.60 | 3.15 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 0 | 3 |
Sullivan Climate Graph - Illinois Climate Chart
Daily normals Sullivan - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 35.1 | 19.7 | 0.08 | 0.08 | 0.12 | 0.30 |
| 2 Jan | 35.0 | 19.5 | 0.20 | 0.20 | 0.31 | 0.80 |
| 3 Jan | 34.9 | 19.4 | 0.28 | 0.28 | 0.39 | 1.00 |
| 4 Jan | 34.8 | 19.2 | 0.35 | 0.35 | 0.51 | 1.30 |
| 5 Jan | 34.7 | 19.1 | 0.47 | 0.47 | 0.71 | 1.80 |
| 6 Jan | 34.6 | 18.9 | 0.55 | 0.55 | 0.91 | 2.30 |
| 7 Jan | 34.5 | 18.8 | 0.63 | 0.63 | 0.98 | 2.50 |
| 8 Jan | 34.4 | 18.6 | 0.71 | 0.71 | 1.18 | 3.00 |
| 9 Jan | 34.3 | 18.5 | 0.79 | 0.79 | 1.42 | 3.60 |
| 10 Jan | 34.3 | 18.3 | 0.87 | 0.87 | 1.50 | 3.80 |
| 11 Jan | 34.2 | 18.2 | 0.94 | 0.94 | 1.69 | 4.30 |
| 12 Jan | 34.2 | 18.1 | 1.02 | 1.02 | 1.81 | 4.60 |
Weather history Sullivan - January 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 02 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 03 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 04 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 05 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 06 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 07 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 08 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 09 Jan | - | - | 0.92 | 0.00 | 0.0 |
| 10 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 11 Jan | - | - | T | T | T |
| 12 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 13 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 14 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 15 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 16 Jan | - | - | - | - | - |
| 17 Jan | - | - | - | - | - |
| 18 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 19 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 20 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 21 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 22 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 23 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 24 Jan | - | - | 0.00 | 0.00 | 0.0 |
| 25 Jan | - | - | - | - | - |
| 26 Jan | - | - | - | - | - |
| 27 Jan | - | - | 0.00 | 0.00 | - |
| 28 Jan | - | - | 0.00 | 0.00 | - |
| 29 Jan | - | - | 0.00 | 0.00 | - |
| 30 Jan | - | - | 0.00 | 0.00 | - |
| 31 Jan | - | - | 0.00 | 0.00 | - |
Past weather Sullivan
| Jan 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | - ºF | 35 ºF | |
| Average low temperature Av. low temp. | - ºF | 18 ºF | |
| Total precipitation Total precip. | 0.92 inch | 2.38 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 January 2026 incomplete - Missing data
Geo Sullivan - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | - | |
| City | Sullivan | |
| Zip Code | 61951 | |
| Longitude | -88.61 dec. degr. | |
| Latitude | 39.6 dec. degr. | |
| Altitude - Elevation | 673ft | |
| ICAO | - | |
| IATA | - |
Date and Time Sullivan - Illinois
| Local Time | 10:39 AM | |
|---|---|---|
| Sunrise | 05:24 AM | |
| Sunset | 08:24 PM | |
| Day/Night | Day | |
| Timezone | Chicago -6:00 | |
| Timezone DB | America - Chicago |
Map of Sullivan - Illinois
USGS National Map — Open interactive map
Sullivan weather averages
| Annual high temperature | 62ºF |
| Annual low temperature | 42ºF |
| Average annual precip. | 39.77 inch |
| Av. annual snowfall | 13 inch |
Station Data
Monthly averages Sullivan
Longitude: -88.6078, Latitude: 39.5995
Average weather Sullivan, IL - 61951
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, ...