Climate & Weather in Boulder, 🇺🇸 United States - Monthly Averages, Forecast & Air Quality
🇺🇸 Boulder,
United States
#1267
Nomad Score
6.6
Coords
40.0149856, -105.2705450
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CURRENT CONDITIONS
Temperature
35.8°C
/
18.6°C
Feels Like
33.9°C / 18.1°C
Weather
🌤️ Overcast
Humidity
%
Wind
17.8 km/h
(gusts 26.3)
UV Index
7.8
Sunrise / Sunset
06:20
/
19:46
Daylight
13.4 hrs
7-DAY FORECAST
| Date | Weather | High | Low | Rain % |
|---|---|---|---|---|
| Sun 23 Aug | 🌤️ Overcast | 35.8° | 18.6° | 15% |
| Mon 24 Aug | 🌧️ Slight rain | 33.6° | 19.6° | 53% |
| Tue 25 Aug | 🌧️ Moderate drizzle | 32.1° | 16.4° | 65% |
| Wed 26 Aug | 🌧️ Moderate rain showers | 30.5° | 16.3° | 56% |
| Thu 27 Aug | 🌧️ Slight rain showers | 31.3° | 15.7° | 39% |
| Fri 28 Aug | 🌧️ Moderate drizzle | 35.7° | 18.7° | 27% |
| Sat 29 Aug | 🌧️ Light drizzle | 33.9° | 18.6° | 20% |
BEST MONTHS TO VISIT
| Month | Rating | Avg High | Avg Low | Rain Days |
|---|---|---|---|---|
| September | Excellent | 26.0°C | 10.5°C | 5.2 |
| June | Excellent | 26.4°C | 12.1°C | 6.8 |
| July | Good | 30.0°C | 14.8°C | 6.0 |
| October | Good | 18.3°C | 4.3°C | 4.1 |
| August | Good | 28.9°C | 14.4°C | 8.1 |
| May | Good | 19.0°C | 5.5°C | 12.2 |
| November | Fair | 10.4°C | -2.3°C | 4.6 |
| February | Fair | 3.1°C | -9.9°C | 6.8 |
| December | Fair | 7.9°C | -3.9°C | 4.1 |
| January | Fair | 2.3°C | -9.3°C | 5.6 |
| March | Fair | 8.8°C | -4.6°C | 8.5 |
| April | Fair | 14.4°C | -0.3°C | 9.0 |
TEMPERATURE BY MONTH
PRECIPITATION & RAIN DAYS
SUNSHINE, UV & HUMIDITY
AIR QUALITY
33
🟢 Good
US Air Quality Index
European AQI: 10
PM2.5
6.2 µg/m³
PM10
6.4 µg/m³
Ozone
24.0 µg/m³
NO₂
18.2 µg/m³
SO₂
0.4 µg/m³
CO
123.0 µg/m³
UV Index
0.0
Dust
1.0 µg/m³
MONTHLY CLIMATE DATA
| Month | High | Low | Mean | Feels Hi | Feels Lo | 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% |