Boulder, CO 14-Day Forecast
Colorado, United States 🇺🇸
The 14-day forecast for Boulder is temporarily unavailable - please check back shortly. Meanwhile, the monthly averages below give a reliable picture of what to expect.
Boulder 14-day outlook: the story
The best time to visit Boulder is generally August to October and June, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 76°F (24°C), with rain on about 7 days a month. For the same question asked the other way round, see where else is warm in August.
For typical conditions month by month, see the Boulder climate & average temperatures guide.
Average temperatures in Boulder by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 38° | 17° | 6 | 1.0 in | 7.9 h/day | 9.6 h | 18% | 61% |
| February | 39° | 15° | 7 | 1.4 in | 9.1 h/day | 10.6 h | 26% | 61% |
| March | 49° | 24° | 8 | 2.1 in | 10.1 h/day | 11.8 h | 27% | 61% |
| April | 57° | 31° | 10 | 2.3 in | 10.9 h/day | 13.2 h | 32% | 58% |
| May | 65° | 41° | 15 | 4.6 in | 11.7 h/day | 14.4 h | 47% | 64% |
| June | 80° | 54° | 8 | 1.9 in | 13.0 h/day | 15.0 h | 28% | 52% |
| July | 85° | 59° | 9 | 1.5 in | 13.1 h/day | 14.7 h | 29% | 50% |
| August | 83° | 58° | 8 | 1.4 in | 12.3 h/day | 13.7 h | 25% | 50% |
| September | 78° | 52° | 6 | 1.0 in | 11.2 h/day | 12.4 h | 21% | 47% |
| October | 63° | 38° | 6 | 1.3 in | 9.7 h/day | 11.1 h | 20% | 53% |
| November | 49° | 27° | 6 | 1.3 in | 8.5 h/day | 9.9 h | 20% | 57% |
| December | 42° | 20° | 5 | 0.9 in | 7.8 h/day | 9.3 h | 17% | 56% |
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