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Boulder, United States Snapshot 2026
Where is Boulder?
Boulder, United States
- Continent
- Americas
- Country
- United States
- City
- Boulder
- Population
- 106.8K
- Elevation
- 1,624 m
- Coordinates
- 40.01°, -105.27°
Boulder is a city in United States with a population of approximately 106.8K. Average temperatures range from -10°C (15°F) in January to 30°C (86°F) in July. The best time to visit is June, July, August, September. The city sits at an elevation of 1,624 m above sea level.
Time in Boulder right now
Open full time & time zone page 11:45 45
Monday, June 15, 2026
IANA time zone
America/Denver
Daylight saving
DST in effect
MST / MDT
Next DST change
November 1
backward -1h
Live weather in Boulder
Daylight in Boulder today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 00m
Climate normals for Boulder
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Poor May
Fair June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 4°C / -10°C | 1°C / -15°C | 6days (28 mm) Good | 7.9h Good | 68% Muggy | 3.2 Moderate | Poor | View Details |
| February | 6°C / -9°C | 3°C / -14°C | 8days (34 mm) Wet | 9.1h Good | 64% Muggy | 4.4 Moderate | Poor | View Details |
| March | 11°C / -4°C | 8°C / -9°C | 10days (59 mm) Wet | 10.2h Excellent | 63% Muggy | 5.8 High | Poor | View Details |
| April | 16°C / 0°C | 13°C / -4°C | 11days (61 mm) Wet | 11.2h Excellent | 60% Moderate | 6.9 High | Poor | View Details |
| May | 20°C / 5°C | 18°C / 2°C | 17days (122 mm) Wet | 12h Excellent | 65% Muggy | 7.7 Very High | Fair | View Details |
| June best | 27°C / 12°C | 27°C / 10°C | 14days (78 mm) Wet | 13.3h Excellent | 57% Moderate | 8.1 Very High | Excellent | View Details |
| July best | 30°C / 15°C | 30°C / 14°C | 16days (70 mm) Wet | 13.1h Excellent | 55% Moderate | 8.3 Very High | Excellent | View Details |
| August best | 29°C / 14°C | 29°C / 13°C | 13days (68 mm) Wet | 12.1h Excellent | 55% Moderate | 7.6 Very High | Excellent | View Details |
| September best | 27°C / 10°C | 25°C / 8°C | 9days (43 mm) Wet | 11.1h Excellent | 53% Moderate | 6.5 High | Excellent | View Details |
| October | 19°C / 3°C | 16°C / 0°C | 7days (36 mm) Good | 9.6h Good | 55% Moderate | 5.1 High | Fair | View Details |
| November | 12°C / -3°C | 8°C / -7°C | 5days (28 mm) Good | 8.3h Good | 60% Moderate | 3.5 Moderate | Poor | View Details |
| December | 7°C / -7°C | 3°C / -11°C | 5days (23 mm) Good | 7.6h Good | 61% Muggy | 2.8 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 4°C / -10°C . Feb: 6°C / -9°C . Mar: 11°C / -4°C . Apr: 16°C / 0°C . May: 20°C / 5°C . Jun: 27°C / 12°C . Jul: 30°C / 15°C . Aug: 29°C / 14°C . Sep: 27°C / 10°C . Oct: 19°C / 3°C . Nov: 12°C / -3°C . Dec: 7°C / -7°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 28 mm. Feb: 34 mm. Mar: 59 mm. Apr: 61 mm. May: 122 mm. Jun: 78 mm. Jul: 70 mm. Aug: 68 mm. Sep: 43 mm. Oct: 36 mm. Nov: 28 mm. Dec: 23 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 68%. Feb: 64%. Mar: 63%. Apr: 60%. May: 65%. Jun: 57%. Jul: 55%. Aug: 55%. Sep: 53%. Oct: 55%. Nov: 60%. Dec: 61%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 14 km/h . Feb: 15 km/h . Mar: 15 km/h . Apr: 15 km/h . May: 14 km/h . Jun: 14 km/h . Jul: 14 km/h . Aug: 13 km/h . Sep: 13 km/h . Oct: 14 km/h . Nov: 14 km/h . Dec: 15 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 7. Oct: UV 5. Nov: UV 4. Dec: UV 3.
Frequently Asked Questions
Boulder has a population of approximately 106.8K.
The best months to visit Boulder are June, July, August, September, when temperatures are pleasant and rainfall is lower.
Boulder receives approximately 650mm of rainfall annually across 121 rainy days.
Boulder is located in United States, in the Americas region.
Boulder sits at an elevation of 1,624 m (5,328 ft) above sea level.