Live Weather & Forecast

Weather in Boulder

Colorado, United States · Real-time conditions & 3-day outlook

Flag of United States
Sunny
12°C
Feels like 11°C
54°F / Feels 52°F
Sunny
Boulder, Colorado
🌞 Daytime
Updated: 2026-04-12 08:30
💧
Humidity
38%
💨
Wind
10.8 km/h WSW
🌬️
Wind Gust
13.2 km/h
🌡️
Pressure
1012 mb
👁️
Visibility
16 km
☀️
UV Index
0.7 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
0%
💦
Dew Point
-0.7°C
🌐
Wind Degree
254°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
120.9 μg/m³
NO₂
1.7 μg/m³
O₃
127 μg/m³
SO₂
1.3 μg/m³
PM 2.5
1.9 μg/m³
PM 10
3.8 μg/m³

Weather Alerts 2

Met · Severe · Expected
Red Flag Warning issued April 11 at 11:13PM MDT until April 12 at 8:00PM MDT by NWS Denver CO

...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK, THE SOUTHERN FRONT RANGE FOOTHILLS, PALMER DIVIDE INTO EAST CENTRAL COLORADO, AND EASTERN LARIMER AND NORTHERN WELD COUNTIES... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 8 PM MDT...

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are for...

Effective: 2026-04-11T23:13:00-06:00  ·  Expires: 2026-04-12T15:00:00-06:00
Met · Severe · Future
Fire Weather Watch issued April 11 at 11:13PM MDT until April 13 at 8:00PM MDT by NWS Denver CO

...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK, THE SOUTHERN FRONT RANGE FOOTHILLS, PALMER DIVIDE INTO EAST CENTRAL COLORADO, AND EASTERN LARIMER AND NORTHERN WELD COUNTIES... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 8 PM MDT...

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are for...

Effective: 2026-04-11T23:13:00-06:00  ·  Expires: 2026-04-12T15:00:00-06:00

Today's Hourly Forecast

24-hour breakdown for Boulder, Colorado

12 AM
Clear
11°
Clear
💧 48% 💨 10.8 km/h
1 AM
Overcast
11°
Overcast
💧 51% 💨 12.6 km/h
2 AM
Partly Cloudy
10°
Partly Cloudy
💧 54% 💨 12.2 km/h
3 AM
Clear
10°
Clear
💧 55% 💨 13.3 km/h
4 AM
Clear
9°
Clear
💧 56% 💨 13.3 km/h
5 AM
Clear
9°
Clear
💧 56% 💨 13.7 km/h
6 AM
Clear
8°
Clear
💧 55% 💨 14 km/h
7 AM
Sunny
9°
Sunny
💧 56% 💨 14 km/h
8 AM
Sunny
12°
Sunny
💧 38% 💨 10.8 km/h
9 AM
Sunny
13°
Sunny
💧 40% 💨 7.6 km/h
10 AM
Sunny
16°
Sunny
💧 31% 💨 11.2 km/h
11 AM
Sunny
18°
Sunny
💧 26% 💨 11.2 km/h
12 PM
Sunny
20°
Sunny
💧 23% 💨 10.8 km/h
1 PM
Sunny
21°
Sunny
💧 21% 💨 8.6 km/h
2 PM
Sunny
21°
Sunny
💧 19% 💨 4.7 km/h
3 PM
Sunny
21°
Sunny
💧 17% 💨 11.2 km/h
4 PM
Sunny
21°
Sunny
💧 17% 💨 21.2 km/h
5 PM
Sunny
20°
Sunny
💧 18% 💨 24.8 km/h
6 PM
Sunny
19°
Sunny
💧 17% 💨 26.6 km/h
7 PM
Sunny
18°
Sunny
💧 21% 💨 20.5 km/h
8 PM
Clear
16°
Clear
💧 26% 💨 23.4 km/h
9 PM
Clear
15°
Clear
💧 19% 💨 25.9 km/h
10 PM
Clear
15°
Clear
💧 27% 💨 26.3 km/h
11 PM
Partly Cloudy
13°
Partly Cloudy
💧 29% 💨 11.2 km/h

3-Day Forecast

Daily overview for Boulder, Colorado

Today
Sunny
Sunny
22° / 7°
🌧️ 0% chance of rain
💧 Avg. humidity: 35%
💨 Max wind: 26.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:27 AM
🌇 Sunset: 07:37 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Sunny
Sunny
17° / 7°
🌧️ 0% chance of rain
💧 Avg. humidity: 28%
💨 Max wind: 38.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:26 AM
🌇 Sunset: 07:38 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Moderate rain
Moderate rain
9° / 7°
🌧️ 77% chance of rain
💧 Avg. humidity: 59%
💨 Max wind: 19.8 km/h
🌧️ Total precip: 7.07 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:24 AM
🌇 Sunset: 07:39 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit Boulder

Plan your trip to Boulder, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Boulder 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Boulder?
Current conditions in Boulder: Sunny, temperature 12°C, humidity 38%.
What is the best time to visit Boulder?
The best time to visit Boulder is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Boulder?
Boulder is located at approximately 40° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Boulder?
The wettest period in Boulder is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Boulder?
For visits to Boulder during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Boulder in?
Boulder is located in United States, in the state of Colorado.
What are the public holidays in Boulder in 2026?
View the 2026 public holidays for Boulder on our Holidays page.
What are the GPS coordinates used for the weather forecast in Boulder?
The weather forecast for Boulder uses coordinates 40.015, -105.2705.