Current Conditions

Boulder, Colorado

56°F13°C
Drizzle

Wind

W 4 mph7 km/h

Humidity

72%

Cloud Cover

97%

As of Wednesday, September 23, 2026 at 1:12 AM MDT

Today's Outlook

Day

Overcast and warm, with a high of 69°F21°C and morning low of 53°F12°C. Light wind from the W around 4 mph6 km/h. 42% chance of drizzle in the afternoon. Dry air.

Night

Overcast, with a low around 53°F12°C. Light wind from the W around 4 mph6 km/h. 47% chance of drizzle in the evening.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
DrizzleHigh 69°F21°CLow 53°F12°CPrecip 0.05 in1.2 mm47%Cloud 98%Wind W 4 mph6 km/hWednesday: Overcast and warm, with a high of 69°F21°C and morning low of 53°F12°C. Light wind from the W around 4 mph6 km/h. 42% chance of drizzle in the afternoon. Dry air. Wednesday Night: Overcast, with a low around 53°F12°C. Light wind from the W around 4 mph6 km/h. 47% chance of drizzle in the evening.
DrizzleHigh 66°F19°CLow 53°F11°CPrecip 0.09 in2.3 mm39%Cloud 86%Wind N 4 mph6 km/hThursday: Overcast and mild, with a high of 66°F19°C and morning low of 53°F11°C. Light wind from the NNE around 4 mph7 km/h. 39% chance of drizzle throughout the day. Dry air. Thursday Night: Overcast, with a low around 54°F12°C. Light wind from the WNW around 3 mph5 km/h. 35% chance of drizzle throughout the night.
ShowersHigh 66°F19°CLow 49°F9°CPrecip 0.17 in4.2 mm85%Cloud 64%Wind SW 3 mph5 km/hFriday: Mostly cloudy and mild, with a high of 66°F19°C and morning low of 49°F9°C. Light wind from the SSE around 3 mph5 km/h. 71% chance of showers throughout the day. Dry air. Friday Night: Mostly cloudy, with a low around 51°F10°C. Light wind from the WSW around 3 mph5 km/h. 85% chance of showers throughout the night.
DrizzleHigh 77°F25°CLow 49°F9°CFeels 45°F7°CPrecip 0.01 in0.2 mm11%Cloud 19%Wind W 6 mph9 km/hSaturday: Mostly clear and warm, with a high of 77°F25°C and morning low of 49°F9°C. Breezy from the W at 6 to 9 mph10 to 14 km/h. Dry air. Saturday Night: Mostly clear, with a low around 49°F10°C. Breezy from the WSW at 5 to 8 mph8 to 13 km/h. 11% chance of drizzle.
DrizzleHigh 76°F24°CLow 47°F8°CFeels 44°F7°CPrecip 0.01 in0.2 mm13%Cloud 60%Wind SW 5 mph8 km/hSunday: Mostly cloudy and warm, with a high of 76°F24°C and morning low of 47°F8°C. Breezy from the S at 5 to 7 mph8 to 11 km/h. Dry air. Sunday Night: Partly cloudy, with a low around 49°F10°C. Light wind from the W around 4 mph7 km/h. 13% chance of drizzle.
Light RainHigh 66°F19°CLow 52°F11°CPrecip 0.13 in3.2 mm68%Cloud 76%Wind W 4 mph7 km/hMonday: Mostly cloudy and mild, with a high of 66°F19°C and morning low of 53°F11°C. Light wind from the W around 4 mph7 km/h. 60% chance of light rain around midday. Dry air. Monday Night: Mostly cloudy, with a low around 52°F11°C. Light wind from the W around 4 mph7 km/h. 68% chance of light rain in the evening.
FlurriesHigh 61°F16°CLow 46°F8°CPrecip 0 in0.1 mm49%Cloud 60%Wind WNW 4 mph6 km/hTuesday: Mostly cloudy and mild, with a high of 61°F16°C and morning low of 46°F8°C. Light wind from the WNW around 4 mph7 km/h. 49% chance of flurries throughout the day. Dry air. Tuesday Night: Mostly cloudy, with a low around 47°F9°C. Light wind from the W around 3 mph5 km/h. 43% chance of flurries throughout the night.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 2369°F21°C53°F12°C0.05 in1.2 mm· 47%98%DrizzleW 4 mph6 km/h
ThursdaySep 2466°F19°C53°F11°C0.09 in2.3 mm· 39%86%DrizzleN 4 mph6 km/h
FridaySep 2566°F19°C49°F9°C0.17 in4.2 mm· 85%64%ShowersSW 3 mph5 km/h
SaturdaySep 2677°F25°C49°F9°C
Feels 45°F7°C
0.01 in0.2 mm· 11%19%DrizzleW 6 mph9 km/h
SundaySep 2776°F24°C47°F8°C
Feels 44°F7°C
0.01 in0.2 mm· 13%60%DrizzleSW 5 mph8 km/h
MondaySep 2866°F19°C52°F11°C0.13 in3.2 mm· 68%76%Light RainW 4 mph7 km/h
TuesdaySep 2961°F16°C46°F8°C0 in0.1 mm· 49%60%FlurriesWNW 4 mph6 km/h
WednesdaySep 3067°F19°C43°F6°C
Feels 40°F4°C
0 in0.1 mm· 21%31%FlurriesW 5 mph8 km/h
ThursdayOct 171°F22°C42°F5°C
Feels 38°F3°C
0.01 in0.3 mm· 5%18%ClearWSW 5 mph7 km/h
FridayOct 272°F22°C45°F7°C
Feels 41°F5°C
0.03 in0.7 mm· 13%36%FlurriesW 5 mph8 km/h
SaturdayOct 364°F18°C43°F6°C0.03 in0.7 mm· 21%41%FlurriesWNW 5 mph7 km/h
SundayOct 464°F18°C40°F5°C
Feels 37°F3°C
0.08 in2 mm· 19%37%Freezing DrizzleWSW 4 mph7 km/h
MondayOct 568°F20°C41°F5°C
Feels 38°F3°C
0.03 in0.8 mm· 11%28%Freezing DrizzleW 5 mph8 km/h
TuesdayOct 668°F20°C42°F6°C
Feels 39°F4°C
0.03 in0.8 mm· 14%24%Freezing DrizzleW 5 mph7 km/h
WednesdayOct 770°F21°C42°F6°C
Feels 39°F4°C
0.02 in0.6 mm· 11%24%Freezing DrizzleW 4 mph7 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

PatternExampleDescription
/weather/{country}/{city}//weather/united-states/san-francisco/City forecast (canonical URL)
/weather/{city}//weather/tokyo/Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}//weather/united-states/california/san-francisco/With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}/weather/nearby?lat=48.1&lon=11.5Find nearest city by coordinates
/weather/{country}//weather/germany/Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 40.0150°N, 105.2706°W·Elevation: 1624m·Timezone: America/Denver·Population: 106,803