Seasonal Weather Patterns in Boulder, CO
Temperature
Average Daily Temperature (°F)
| Boulder, CO | U.S. Avg. | Difference | |
|---|---|---|---|
| January | 29 | 43 | -14 |
| July | 73 | 79 | -6 |
Average Monthly Number of Hot and Freezing Days
| Boulder, CO | U.S. Avg. | Difference | |
|---|---|---|---|
| Summer: Hot Days | 9 | 11 | -2 |
| Winter: Freezing Days | 25 | 12 | +13 |
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Sunshine
Average Annual Number of Clear and Cloudy Days
| Boulder, CO | U.S. Avg. | Difference | |
|---|---|---|---|
| Clear Days | 195 | 217 | -22 |
| Cloudy Days | 170 | 148 | +22 |
Average Daylight Hours per Day
| Boulder, CO | 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
| Boulder, CO | U.S. Avg. | Difference | |
|---|---|---|---|
| Rainy Days | 88 | 65 | +23 |
| Snow Days | 30 | 7 | +23 |
Average Monthly Humidity (%) in Boulder, CO
| Boulder, CO | U.S. Avg. | Difference | |
|---|---|---|---|
| January | 63 | 68 | -5% |
| July | 43 | 61 | -18% |
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