US
Boulder climate and weather
Current conditions
19.5° / 7.1°
Clear sky
- Feels like
- 15.5° / 2.2°
- Humidity
- —
- Wind
- 14.8 km/h (gusts 19.8)
- UV index
- 4.0
- Sunrise / sunset
- 06:43 / 16:47
- Daylight
- 10.1 hrs
7-day forecast
| Date | Weather | High | Low | Feels like | Precip | Rain | Wind | UV |
|---|---|---|---|---|---|---|---|---|
| Thu 12 Nov | Clear sky | 19.5° | 7.1° | 15.5° / 2.2° | 0.0 mm | 0% | 14.8 km/h | 4.0 |
| Fri 13 Nov | Overcast | 18.1° | 6.0° | 14.3° / 2.2° | 0.0 mm | 0% | 11.5 km/h | 3.4 |
| Sat 14 Nov | Overcast | 13.4° | 2.6° | 9.9° / -0.2° | 0.0 mm | 19% | 9.2 km/h | 3.1 |
| Sun 15 Nov | Overcast | 13.2° | 2.6° | 9.1° / -0.4° | 0.0 mm | 6% | 13.9 km/h | 3.8 |
| Mon 16 Nov | Overcast | 16.1° | 3.0° | 11.9° / -1.0° | 0.0 mm | 0% | 10.6 km/h | 3.3 |
| Tue 17 Nov | Partly cloudy | 17.1° | 5.2° | 12.6° / 1.4° | 0.0 mm | 8% | 10.9 km/h | 3.6 |
| Wed 18 Nov | Overcast | 18.8° | 4.5° | 15.0° / 0.8° | 0.0 mm | 26% | 21.8 km/h | 3.4 |
Air quality
48
Good
US Air Quality Index
European AQI: 33
- PM2.5
- 6.5 µg/m³
- PM10
- 8.0 µg/m³
- Ozone (O₃)
- 85.0 µg/m³
- NOâ‚‚
- 9.7 µg/m³
- SOâ‚‚
- 0.7 µg/m³
- CO
- 145.0 µg/m³
- UV index
- 3.2
- Dust
- 1.0 µg/m³
Climate through the year
Now: November
Average high and low, °C Rainfall, mm
Temperature by month
Precipitation and rain days
Sunshine, UV and humidity
Best months to visit
| Month | Rating | Avg high | Avg low | Rain days | Sun (hrs) | Humidity |
|---|---|---|---|---|---|---|
| September | Excellent · 93 | 26.0°C | 10.5°C | 5.2 | 336.0 | 47.4% |
| June | Excellent · 91 | 26.4°C | 12.1°C | 6.8 | 378.0 | 52.5% |
| July | Good · 75 | 30.0°C | 14.8°C | 6.0 | 406.1 | 48.8% |
| October | Good · 71 | 18.3°C | 4.3°C | 4.1 | 303.8 | 50.4% |
| August | Good · 69 | 28.9°C | 14.4°C | 8.1 | 378.2 | 51.5% |
| May | Good · 62 | 19.0°C | 5.5°C | 12.2 | 362.7 | 60.0% |
| November | Fair · 53 | 10.4°C | -2.3°C | 4.6 | 252.0 | 53.5% |
| February | Fair · 49 | 3.1°C | -9.9°C | 6.8 | 249.2 | 59.5% |
| December | Fair · 49 | 7.9°C | -3.9°C | 4.1 | 235.6 | 52.1% |
| January | Fair · 46 | 2.3°C | -9.3°C | 5.6 | 235.6 | 60.5% |
| March | Fair · 42 | 8.8°C | -4.6°C | 8.5 | 297.6 | 58.9% |
| April | Fair · 42 | 14.4°C | -0.3°C | 9.0 | 324.0 | 54.2% |
Monthly climate data
| Month | High | Low | Mean | Feels high | Feels low | Precip | Rain days | Snow | Sun | Daylight | UV | Humidity | Wind | Clouds |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | 2.3° | -9.3° | -3.5° | -1.8° | -13.9° | 25.1 mm | 5.6 | 17.3 cm | 235.6 hrs | 9.7 hrs | — | 60.5% | 15.0 km/h | 60.7% |
| Feb | 3.1° | -9.9° | -3.3° | -0.7° | -14.8° | 38.1 mm | 6.8 | 25.4 cm | 249.2 hrs | 10.7 hrs | — | 59.5% | 16.6 km/h | 56.9% |
| Mar | 8.8° | -4.6° | 1.8° | 5.4° | -9.0° | 56.0 mm | 8.5 | 29.3 cm | 297.6 hrs | 12.0 hrs | — | 58.9% | 16.4 km/h | 60.7% |
| Apr | 14.4° | -0.3° | 6.8° | 11.6° | -4.3° | 48.5 mm | 9.0 | 16.4 cm | 324.0 hrs | 13.3 hrs | — | 54.2% | 18.0 km/h | 53.4% |
| May | 19.0° | 5.5° | 12.2° | 17.5° | 2.7° | 98.7 mm | 12.2 | 6.4 cm | 362.7 hrs | 14.4 hrs | — | 60.0% | 16.7 km/h | 56.2% |
| Jun | 26.4° | 12.1° | 19.2° | 26.1° | 10.2° | 40.1 mm | 6.8 | 0.1 cm | 378.0 hrs | 15.0 hrs | — | 52.5% | 15.7 km/h | 45.5% |
| Jul | 30.0° | 14.8° | 22.4° | 29.8° | 13.7° | 25.3 mm | 6.0 | 0.0 cm | 406.1 hrs | 14.7 hrs | — | 48.8% | 16.4 km/h | 40.0% |
| Aug | 28.9° | 14.4° | 21.4° | 28.6° | 13.2° | 32.1 mm | 8.1 | 0.0 cm | 378.2 hrs | 13.7 hrs | — | 51.5% | 14.8 km/h | 40.5% |
| Sep | 26.0° | 10.5° | 17.8° | 24.2° | 8.2° | 27.1 mm | 5.2 | 0.0 cm | 336.0 hrs | 12.4 hrs | — | 47.4% | 15.1 km/h | 33.2% |
| Oct | 18.3° | 4.3° | 10.8° | 14.9° | 1.2° | 19.8 mm | 4.1 | 3.3 cm | 303.8 hrs | 11.1 hrs | — | 50.4% | 14.5 km/h | 37.1% |
| Nov | 10.4° | -2.3° | 3.6° | 6.5° | -6.4° | 24.5 mm | 4.6 | 13.6 cm | 252.0 hrs | 10.0 hrs | — | 53.5% | 14.7 km/h | 55.5% |
| Dec | 7.9° | -3.9° | 1.6° | 3.7° | -8.2° | 24.0 mm | 4.1 | 13.0 cm | 235.6 hrs | 9.4 hrs | — | 52.1% | 17.6 km/h | 62.9% |