Climate Joliet - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 31 | 36 | 47 | 61 | 71 | 81 |
| Average low in ºF Av. low Lo | 17 | 20 | 29 | 39 | 49 | 60 |
| Av. precipitation in inch Av. precip. Pre. | 1.80 | 1.71 | 2.25 | 3.49 | 4.08 | 3.88 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 84 | 82 | 76 | 64 | 49 | 35 |
| Average low in ºF Av. low Lo | 64 | 63 | 55 | 43 | 33 | 21 |
| Av. precipitation in inch Av. precip. Pre. | 4.33 | 4.16 | 3.01 | 2.84 | 3.06 | 2.20 |
What is the average weather in Joliet, Illinois?
Joliet experiences a humid continental climate, marked by very strong seasonal temperature swings. Summers are warm and fairly wet, with the most precipitation occurring during this season. Winters are cold, and the inland location amplifies these significant temperature differences between seasons. Precipitation is spread relatively evenly throughout the year.
Joliet Climate Graph - Illinois Climate Chart
Daily normals Joliet - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 32.3 | 18.5 | 0.07 | 0.07 | 0.10 | 0.10 |
| 2 Jan | 32.1 | 18.3 | 0.13 | 0.13 | 0.30 | 0.30 |
| 3 Jan | 31.9 | 18.1 | 0.20 | 0.20 | 0.40 | 0.40 |
| 4 Jan | 31.8 | 17.9 | 0.27 | 0.27 | 0.50 | 0.50 |
| 5 Jan | 31.6 | 17.8 | 0.34 | 0.34 | 0.70 | 0.70 |
| 6 Jan | 31.5 | 17.6 | 0.41 | 0.41 | 0.80 | 0.80 |
| 7 Jan | 31.4 | 17.4 | 0.48 | 0.48 | 1.00 | 1.00 |
| 8 Jan | 31.2 | 17.2 | 0.55 | 0.55 | 1.10 | 1.10 |
| 9 Jan | 31.1 | 17.1 | 0.62 | 0.62 | 1.30 | 1.30 |
| 10 Jan | 31.0 | 16.9 | 0.69 | 0.69 | 1.40 | 1.40 |
| 11 Jan | 30.9 | 16.7 | 0.76 | 0.76 | 1.60 | 1.60 |
| 12 Jan | 30.9 | 16.6 | 0.83 | 0.83 | 1.70 | 1.70 |
| 13 Jan | 30.8 | 16.5 | 0.89 | 0.89 | 1.90 | 1.90 |
| 14 Jan | 30.7 | 16.4 | 0.96 | 0.96 | 2.00 | 2.00 |
| 15 Jan | 30.7 | 16.2 | 1.02 | 1.02 | 2.20 | 2.20 |
| 16 Jan | 30.7 | 16.1 | 1.09 | 1.09 | 2.30 | 2.30 |
| 17 Jan | 30.6 | 16.1 | 1.16 | 1.16 | 2.50 | 2.50 |
| 18 Jan | 30.6 | 16.0 | 1.23 | 1.23 | 2.60 | 2.60 |
| 19 Jan | 30.6 | 15.9 | 1.30 | 1.30 | 2.80 | 2.80 |
| 20 Jan | 30.6 | 15.9 | 1.36 | 1.36 | 3.00 | 3.00 |
| 21 Jan | 30.6 | 15.8 | 1.42 | 1.42 | 3.10 | 3.10 |
| 22 Jan | 30.7 | 15.8 | 1.48 | 1.48 | 3.30 | 3.30 |
| 23 Jan | 30.7 | 15.8 | 1.54 | 1.54 | 3.50 | 3.50 |
| 24 Jan | 30.8 | 15.8 | 1.60 | 1.60 | 3.60 | 3.60 |
| 25 Jan | 30.9 | 15.8 | 1.66 | 1.66 | 3.80 | 3.80 |
| 26 Jan | 30.9 | 15.9 | 1.72 | 1.72 | 4.00 | 4.00 |
| 27 Jan | 31.0 | 15.9 | 1.77 | 1.77 | 4.20 | 4.20 |
| 28 Jan | 31.2 | 16.0 | 1.83 | 1.83 | 4.40 | 4.40 |
| 29 Jan | 31.3 | 16.1 | 1.88 | 1.88 | 4.60 | 4.60 |
| 30 Jan | 31.4 | 16.2 | 1.94 | 1.94 | 4.80 | 4.80 |
| 31 Jan | 31.6 | 16.3 | 1.99 | 1.99 | 5.00 | 5.00 |
Weather history Joliet - August 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Aug | 75.9 | 66.0 | 0.00 | 0.00 | 0.0 |
| 02 Aug | 71.1 | 66.0 | 3.87 | 0.00 | 0.0 |
| 03 Aug | 78.1 | 63.0 | 0.00 | 0.00 | 0.0 |
| 04 Aug | 82.9 | 64.0 | 0.00 | 0.00 | 0.0 |
| 05 Aug | 84.0 | 64.9 | 0.00 | 0.00 | 0.0 |
| 06 Aug | 82.0 | 69.1 | 0.00 | 0.00 | 0.0 |
| 07 Aug | 79.0 | 66.9 | 0.00 | 0.00 | 0.0 |
| 08 Aug | 75.9 | 66.0 | 0.00 | 0.00 | 0.0 |
| 09 Aug | 84.0 | 64.9 | 0.00 | 0.00 | 0.0 |
| 10 Aug | 86.0 | 64.9 | 0.00 | 0.00 | 0.0 |
| 11 Aug | 88.0 | 73.0 | 0.06 | 0.00 | 0.0 |
| 12 Aug | - | - | - | - | - |
| 13 Aug | - | - | - | - | - |
| 14 Aug | - | - | - | - | - |
| 15 Aug | - | - | - | - | - |
| 16 Aug | - | - | - | - | - |
| 17 Aug | - | - | - | - | - |
| 18 Aug | - | - | - | - | - |
| 19 Aug | - | - | - | - | - |
| 20 Aug | - | - | - | - | - |
| 21 Aug | - | - | - | - | - |
| 22 Aug | - | - | - | - | - |
| 23 Aug | - | - | - | - | - |
| 24 Aug | - | - | - | - | - |
| 25 Aug | - | - | - | - | - |
| 26 Aug | - | - | - | - | - |
| 27 Aug | - | - | - | - | - |
| 28 Aug | - | - | - | - | - |
| 29 Aug | - | - | - | - | - |
| 30 Aug | - | - | - | - | - |
| 31 Aug | - | - | - | - | - |
Past weather Joliet
| Aug 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 80.6 ºF | 31 ºF | |
| Average low temperature Av. low temp. | 66.2 ºF | 17 ºF | |
| Total precipitation Total precip. | 3.93 inch | 1.80 inch | |
| Total snowfall Total snowfall | 0.00 inch | 0 inch | |
| Highest max temperature Highest max temp. | 88.0 ºF | - | |
| Lowest max temperature Lowest max temp. | 71.1 ºF | - | |
| Highest min temperature Highest min temp. | 73.0 ºF | - | |
| Lowest min temperature Lowest min temp. | 63.0 ºF | - | |
Past weather August 2026 incomplete - Missing data
Geo Joliet - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | Will | |
| City | Joliet | |
| Zip Code | 60433 | |
| Longitude | -88.08 dec. degr. | |
| Latitude | 41.52 dec. degr. | |
| Altitude - Elevation | 531ft | |
| ICAO | - | |
| IATA | - |
Date and Time Joliet - Illinois
| Local Time | 10:50 PM | |
|---|---|---|
| Sunrise | 05:58 AM | |
| Sunset | 07:56 PM | |
| Day/Night | Night | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Joliet - Illinois
USGS National Map — Open interactive map
Joliet weather averages
| Annual high temperature | 60ºF |
| Annual low temperature | 41ºF |
| Average annual precip. | 36.81 inch |
Station Data
Monthly averages Joliet
Longitude: -88.08, Latitude: 41.52
Average weather Joliet, IL - 60433
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, ...