Climate Mount Vernon - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 38 | 43 | 53 | 65 | 74 | 83 |
| Average low in ºF Av. low Lo | 21 | 24 | 33 | 44 | 54 | 63 |
| Av. precipitation in inch Av. precip. Pre. | 2.34 | 2.85 | 3.87 | 4.36 | 5.16 | 3.88 |
| Av. snowfall in inch Snowfall Sn | 4 | 5 | 1 | 0 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 86 | 86 | 79 | 67 | 55 | 41 |
| Average low in ºF Av. low Lo | 67 | 65 | 56 | 44 | 35 | 24 |
| Av. precipitation in inch Av. precip. Pre. | 3.68 | 2.96 | 3.22 | 3.65 | 4.21 | 3.22 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 0 | 4 |
What is the average weather in Mount Vernon, Illinois?
Mount Vernon experiences a humid continental climate, characterized by very strong seasonal temperature contrasts. Summers are warm, while winters are cold and bring regular snowfall. The area is fairly wet overall, with precipitation spread relatively evenly throughout the year, though spring tends to be wetter and winter is the driest season.
Mount Vernon Climate Graph - Illinois Climate Chart
Daily normals Mount Vernon - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 38.0 | 21.1 | 0.08 | 0.08 | 0.12 | 0.30 |
| 2 Jan | 37.9 | 21.1 | 0.16 | 0.16 | 0.20 | 0.50 |
| 3 Jan | 37.8 | 21.0 | 0.24 | 0.24 | 0.39 | 1.00 |
| 4 Jan | 37.8 | 21.0 | 0.31 | 0.31 | 0.51 | 1.30 |
| 5 Jan | 37.7 | 20.9 | 0.39 | 0.39 | 0.59 | 1.50 |
| 6 Jan | 37.7 | 20.9 | 0.47 | 0.47 | 0.71 | 1.80 |
| 7 Jan | 37.7 | 20.8 | 0.55 | 0.55 | 0.91 | 2.30 |
| 8 Jan | 37.6 | 20.8 | 0.63 | 0.63 | 0.98 | 2.50 |
| 9 Jan | 37.6 | 20.8 | 0.71 | 0.71 | 1.10 | 2.80 |
| 10 Jan | 37.6 | 20.8 | 0.79 | 0.79 | 1.18 | 3.00 |
| 11 Jan | 37.6 | 20.8 | 0.87 | 0.87 | 1.42 | 3.60 |
| 12 Jan | 37.6 | 20.7 | 0.91 | 0.91 | 1.50 | 3.80 |
| 13 Jan | 37.7 | 20.7 | 0.98 | 0.98 | 1.61 | 4.10 |
| 14 Jan | 37.7 | 20.7 | 1.06 | 1.06 | 1.69 | 4.30 |
| 15 Jan | 37.7 | 20.7 | 1.14 | 1.14 | 1.81 | 4.60 |
| 16 Jan | 37.8 | 20.7 | 1.18 | 1.18 | 1.89 | 4.80 |
| 17 Jan | 37.8 | 20.7 | 1.26 | 1.26 | 2.01 | 5.10 |
| 18 Jan | 37.9 | 20.7 | 1.34 | 1.34 | 2.09 | 5.30 |
| 19 Jan | 38.0 | 20.8 | 1.42 | 1.42 | 2.20 | 5.60 |
| 20 Jan | 38.0 | 20.8 | 1.50 | 1.50 | 2.28 | 5.80 |
| 21 Jan | 38.1 | 20.8 | 1.57 | 1.57 | 2.40 | 6.10 |
| 22 Jan | 38.2 | 20.8 | 1.61 | 1.61 | 2.52 | 6.40 |
| 23 Jan | 38.3 | 20.9 | 1.69 | 1.69 | 2.72 | 6.90 |
| 24 Jan | 38.4 | 20.9 | 1.77 | 1.77 | 2.80 | 7.10 |
| 25 Jan | 38.6 | 20.9 | 1.85 | 1.85 | 2.91 | 7.40 |
| 26 Jan | 38.7 | 21.0 | 1.93 | 1.93 | 2.99 | 7.60 |
| 27 Jan | 38.8 | 21.1 | 2.01 | 2.01 | 3.11 | 7.90 |
| 28 Jan | 39.0 | 21.1 | 2.09 | 2.09 | 3.19 | 8.10 |
| 29 Jan | 39.1 | 21.2 | 2.17 | 2.17 | 3.39 | 8.60 |
| 30 Jan | 39.3 | 21.3 | 2.24 | 2.24 | 3.50 | 8.90 |
| 31 Jan | 39.5 | 21.4 | 2.32 | 2.32 | 3.58 | 9.10 |
Weather history Mount Vernon - July 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Jul | 93.9 | 71.1 | 0.01 | - | - |
| 02 Jul | 93.9 | 72.0 | 0.00 | - | - |
| 03 Jul | - | - | - | - | - |
| 04 Jul | - | - | - | - | - |
| 05 Jul | - | - | - | - | - |
| 06 Jul | - | - | - | - | - |
| 07 Jul | - | - | - | - | - |
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| 15 Jul | - | - | - | - | - |
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| 18 Jul | - | - | - | - | - |
| 19 Jul | - | - | - | - | - |
| 20 Jul | - | - | - | - | - |
| 21 Jul | - | - | - | - | - |
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| 28 Jul | - | - | - | - | - |
| 29 Jul | - | - | - | - | - |
| 30 Jul | - | - | - | - | - |
| 31 Jul | - | - | - | - | - |
Past weather Mount Vernon
| Jul 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 93.9 ºF | 38 ºF | |
| Average low temperature Av. low temp. | 71.6 ºF | 21 ºF | |
| Total precipitation Total precip. | 0.01 inch | 2.34 inch | |
| Total snowfall Total snowfall | - inch | 4 inch | |
| Highest max temperature Highest max temp. | 93.9 ºF | - | |
| Lowest max temperature Lowest max temp. | 93.9 ºF | - | |
| Highest min temperature Highest min temp. | 72.0 ºF | - | |
| Lowest min temperature Lowest min temp. | 71.1 ºF | - | |
Past weather July 2026 incomplete - Missing data
Geo Mount Vernon - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | - | |
| City | Mount Vernon | |
| Zip Code | 62864 | |
| Longitude | -88.9 dec. degr. | |
| Latitude | 38.32 dec. degr. | |
| Altitude - Elevation | 512ft | |
| ICAO | - | |
| IATA | - |
Date and Time Mount Vernon - Illinois
| Local Time | 12:22 PM | |
|---|---|---|
| Sunrise | 05:35 AM | |
| Sunset | 08:24 PM | |
| Day/Night | Day | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Mount Vernon - Illinois
USGS National Map — Open interactive map
Mount Vernon weather averages
| Annual high temperature | 64ºF |
| Annual low temperature | 44ºF |
| Average annual precip. | 43.4 inch |
| Av. annual snowfall | 14 inch |
Station Data
Monthly averages Mount Vernon
Longitude: -88.9031, Latitude: 38.3173
Average weather Mount Vernon, IL - 62864
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, ...