Seasonal Weather Patterns in Joliet, IL
Temperature
Average Daily Temperature (°F)
| Joliet, IL | U.S. Avg. | Difference | |
|---|---|---|---|
| January | 26 | 43 | -17 |
| July | 74 | 79 | -5 |
Average Monthly Number of Hot and Freezing Days
| Joliet, IL | U.S. Avg. | Difference | |
|---|---|---|---|
| Summer: Hot Days | 3 | 11 | -8 |
| Winter: Freezing Days | 24 | 12 | +12 |
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Sunshine
Average Annual Number of Clear and Cloudy Days
| Joliet, IL | U.S. Avg. | Difference | |
|---|---|---|---|
| Clear Days | 163 | 217 | -54 |
| Cloudy Days | 202 | 148 | +54 |
Average Daylight Hours per Day
| Joliet, IL | U.S. Avg. | Difference | |
|---|---|---|---|
| January | 9 | 10 | -1 |
| July | 15 | 15 | No difference |
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Precipitation
Average Annual Number of Rainy and Snow Days
| Joliet, IL | U.S. Avg. | Difference | |
|---|---|---|---|
| Rainy Days | 115 | 99 | +16 |
| Snow Days | 23 | 7 | +16 |
Average Monthly Humidity (%) in Joliet, IL
| Joliet, IL | U.S. Avg. | Difference | |
|---|---|---|---|
| January | 75 | 68 | +7% |
| July | 71 | 61 | +10% |
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