Weather Forecast for Boulder

Colorado, United States of America

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Clear

Current Weather - Boulder: 3°C

Colorado, United States of America

Clear

Feels like 0°C

Wind

12 km/h W

Humidity

41%

Pressure

1002 mb

UV Index

0

Visibility

16 km

Partly Cloudy

Partly Cloudy

Wednesday, February 18, 2026

High

12°C

Low

-2°C

Rain Chance

0%

Hourly Forecast

Partly Cloudy 7°C
12:00
Partly Cloudy 8°C
13:00
Sunny 9°C
14:00
Sunny 10°C
15:00
Sunny 9°C
16:00
Sunny 8°C
17:00
Cloudy 7°C
18:00
Overcast 4°C
19:00
Overcast 2°C
20:00
Clear -0°C
21:00
Overcast -1°C
22:00
Overcast -2°C
23:00
Feb 19

Day Statistics

Maximum Wind

36 km/h

Humidity

40%

Precipitation

0 mm

UV Index

1

Visibility

10 km

Rain Chance

0%

Snow Chance

0%

Sun & Moon

Sunrise

06:50 AM

Sunset

05:41 PM

Moonrise

07:27 AM

Moonset

07:16 PM

Moon Phase

Waxing Crescent

Moon Illumination

0%

Air Quality

PM2.5

2.9

μg/m³

PM10

4.2

μg/m³

NO₂

5.1

μg/m³

O₃

93.4

μg/m³

SO₂

1.9

μg/m³

CO

148.7

μg/m³

US EPA Index: 1 GB DEFRA Index: 1

Weather Alerts

Winter Weather Advisory issued February 17 at 8:57AM MST until February 18 at 11:00PM MST by NWS Denver CO

Jackson County Below 9000 Feet; Grand and Summit Counties Below 9000 Feet; South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet; South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet Feb 17, 08:57 AM - Feb 18, 12:00 AM
Severity: Moderate Urgency: Expected

* WHAT...Snow expected. Additional snow accumulations between 2 and 5 inches in the valleys. For the mountains, 4 to 8 inches of additional snowfall with localized higher amounts up 12 inches. Winds gusting as high as 60 mph over the mountain passes. * WHERE...North Park, Grand and Summit Counties Below 9000 Feet, Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until 11 PM MST Wednesday. * IMPACTS...Snow and blowing snow will reduce visibility to a quarter mile or less, with potential for sudden snow squalls to bring quick intense bursts of snow, rapidly reduced visibility, and treacherous travel conditions. Travel could be very difficult to impossible. The hazardous conditions will impact the Tuesday morning and evening commutes.

Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. If traveling to the mountains, be prepared for winter driving conditions. Check cotrip.org for road closures and traction laws.

Event: Winter Weather Advisory Certainty: Likely Category: Met

Winter Weather Advisory issued February 17 at 10:59PM MST until February 19 at 5:00AM MST by NWS Denver CO

South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet; South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet Feb 17, 10:59 PM - Feb 18, 03:00 PM
Severity: Moderate Urgency: Expected

* WHAT...Snow. Additional snow accumulations between 3 and 8 inches. Winds gusting as high as 65 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until 5 AM MST Thursday. * IMPACTS...Snow and blowing snow will reduce visibility to a quarter mile or less at times. There will also be potential for sudden snow squalls late Wednesday afternoon and evening to bring quick intense bursts of snow and brief whiteout conditions. The hazardous conditions will impact the Wednesday morning and evening commutes.

Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org.

Event: Winter Weather Advisory Certainty: Likely Category: Met

High Wind Watch issued February 17 at 10:51PM MST until February 19 at 7:00AM MST by NWS Denver CO

Larimer and Boulder Counties Between 6000 and 9000 Feet; Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet; Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County Feb 17, 10:51 PM - Feb 18, 03:00 PM
Severity: Severe Urgency: Future

* WHAT...West winds 25 to 40 mph with gusts up to 75 mph possible. * WHERE...The Northern Front Range Foothills, The Southern Front Range Foothills, and Boulder and the western suburbs of Denver. * WHEN...From Wednesday evening through Thursday morning. * IMPACTS...Damaging winds could break tree limbs and blow down fences. Travel could be difficult, especially for high profile vehicles.

Monitor the latest forecasts and warnings for updates.

Event: High Wind Watch Certainty: Possible Category: Met

Avalanche Warning issued February 17 at 5:32PM MST by NWS Denver CO

Elkhead and Park Mountains; Grand and Battlement Mesas; Gore and Elk Mountains/Central Mountain Valleys; West Elk and Sawatch Mountains; Flat Tops; Northwestern San Juan Mountains; Southwest San Juan Mountains; West Jackson and West Grand Counties Above 9000 Feet; South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet; Eastern Sawatch Mountains above 11000 Ft; Eastern San Juan Mountains Above 10000 Ft Feb 17, 05:32 PM - Feb 19, 05:45 PM
Severity: Unknown Urgency: Unknown

AVWBOU THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE COLORADO AVALANCHE INFORMATION CENTER. AVALANCHE WARNING IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY *WHAT Heavy snow and strong winds will result in HIGH (4 of 5) avalanche danger. *WHEREthe Flat Tops, Park Range, Grand Mesa, Elkhead Mountains, Gore Range, Sawatch, West Elk, Elk Mountains, and San Juan Mountains. *WHEN Expect very dangerous avalanche conditions to begin on Tuesday evening and last through Thursday. *IMPACTS Large and dangerous avalanches will be easy to trigger. Large avalanches will run naturally. *PRECAUTION/PREPAREDNESS ACTIONS Travel in backcountry avalanche terrain is not recommended from Tuesday evening through Friday. Avoid travel on and under slopes with a slope angle steeper than about 30 degrees. You can find more detailed information at colorado.gov/avalanche

Event: Avalanche Warning Certainty: Unknown Category: Met

Winter Storm Warning issued February 17 at 8:57AM MST until February 19 at 5:00AM MST by NWS Denver CO

West Jackson and West Grand Counties Above 9000 Feet Feb 17, 08:57 AM - Feb 18, 12:00 AM
Severity: Severe Urgency: Expected

* WHAT...Heavy snow expected. Total additional snow accumulations between 8 and 16 inches. Winds gusting as high as 55 mph. * WHERE...Rabbit Ears Pass. * WHEN...Until 5 AM MST Thursday. * IMPACTS...Snow and blowing snow will reduce visibility to a quarter mile or less, with potential for sudden snow squalls to bring quick intense bursts of snow and rapidly reduced visibility. Snow and ice covered roads will make travel very difficult at times.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. If traveling to the mountains, be prepared for winter driving conditions. Check cotrip.org for road closures and traction laws.

Event: Winter Storm Warning Certainty: Likely Category: Met