Current Conditions

Longmont, Colorado

70°F21°C
Clear

Wind

WNW 3 mph5 km/h

Humidity

46%

Cloud Cover

28%

As of Wednesday, September 2, 2026 at 9:24 PM MDT

Today's Outlook

Night

Mostly clear, with a low around 60°F15°C. Light wind from the W around 4 mph7 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
ClearHigh 89°F32°CLow 56°F13°CPrecip 0 in0.1 mm1%Cloud 15%Wind SSW 4 mph7 km/hThursday: Mostly clear and hot, with a high of 89°F32°C and morning low of 56°F13°C. Light wind from the S around 4 mph7 km/h. Dry air. Thursday Night: Mostly clear, with a low around 60°F15°C. Light wind from the W around 4 mph7 km/h.
ClearHigh 91°F33°CLow 56°F13°CPrecip 0 in0.1 mm6%Cloud 14%Wind SW 4 mph7 km/hFriday: Mostly clear and hot, with a high of 91°F33°C and morning low of 56°F13°C. Light wind from the S around 5 mph8 km/h. Dry air. Friday Night: Mostly clear, with a low around 60°F15°C. Light wind from the W around 4 mph6 km/h.
DrizzleHigh 89°F32°CLow 60°F15°CPrecip 0.01 in0.2 mm10%Cloud 39%Wind W 4 mph6 km/hSaturday: Partly cloudy and hot, with a high of 89°F32°C and morning low of 60°F15°C. Light wind from the NW around 4 mph6 km/h. Dry air. Saturday Night: Partly cloudy, with a low around 62°F17°C. Light wind from the W around 4 mph7 km/h. 10% chance of drizzle.
DrizzleHigh 87°F31°CLow 61°F16°CPrecip 0.03 in0.7 mm29%Cloud 47%Wind WSW 4 mph6 km/hSunday: Partly cloudy and hot, with a high of 87°F31°C and morning low of 61°F16°C. Light wind from the ESE around 4 mph6 km/h. 17% chance of drizzle in the afternoon. Dry air. Sunday Night: Mostly cloudy, with a low around 64°F18°C. Light wind from the W around 4 mph6 km/h. 29% chance of drizzle in the evening.
ShowersHigh 87°F31°CLow 61°F16°CPrecip 0.04 in1 mm42%Cloud 57%Wind SW 4 mph6 km/hMonday: Mostly cloudy and hot, with a high of 87°F31°C and morning low of 61°F16°C. Light wind from the S around 4 mph7 km/h. 17% chance of drizzle in the afternoon. Dry air. Monday Night: Mostly cloudy, with a low around 64°F18°C. Light wind from the WSW around 4 mph6 km/h. 42% chance of showers in the evening.
DrizzleHigh 85°F29°CLow 58°F15°CPrecip 0.03 in0.8 mm19%Cloud 34%Wind SSE 5 mph7 km/hTuesday: Partly cloudy and warm, with a high of 85°F29°C and morning low of 58°F15°C. Breezy from the SE at 5 to 7 mph8 to 11 km/h. 13% chance of drizzle in the afternoon. Dry air. Tuesday Night: Partly cloudy, with a low around 62°F17°C. Light wind from the W around 4 mph7 km/h. 19% chance of drizzle in the evening.
DrizzleHigh 84°F29°CLow 58°F14°CPrecip 0.03 in0.8 mm19%Cloud 50%Wind SSW 4 mph6 km/hWednesday: Mostly cloudy and warm, with a high of 84°F29°C and morning low of 58°F14°C. Light wind from the SSE around 4 mph6 km/h. 14% chance of drizzle in the afternoon. Dry air. Wednesday Night: Partly cloudy, with a low around 61°F16°C. Light wind from the WNW around 4 mph6 km/h. 19% chance of drizzle throughout the night.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
ThursdaySep 389°F32°C56°F13°C0 in0.1 mm· 1%15%ClearSSW 4 mph7 km/h
FridaySep 491°F33°C56°F13°C0 in0.1 mm· 6%14%ClearSW 4 mph7 km/h
SaturdaySep 589°F32°C60°F15°C0.01 in0.2 mm· 10%39%DrizzleW 4 mph6 km/h
SundaySep 687°F31°C61°F16°C0.03 in0.7 mm· 29%47%DrizzleWSW 4 mph6 km/h
MondaySep 787°F31°C61°F16°C0.04 in1 mm· 42%57%ShowersSW 4 mph6 km/h
TuesdaySep 885°F29°C58°F15°C0.03 in0.8 mm· 19%34%DrizzleSSE 5 mph7 km/h
WednesdaySep 984°F29°C58°F14°C0.03 in0.8 mm· 19%50%DrizzleSSW 4 mph6 km/h
ThursdaySep 1080°F27°C57°F14°C0.07 in1.7 mm· 25%47%DrizzleSW 4 mph6 km/h
FridaySep 1181°F27°C55°F13°C0.09 in2.4 mm· 21%40%DrizzleWSW 4 mph7 km/h
SaturdaySep 1280°F27°C54°F12°C0.05 in1.3 mm· 20%33%DrizzleSW 4 mph7 km/h
SundaySep 1380°F27°C54°F12°C0.05 in1.3 mm· 17%40%DrizzleSSW 4 mph7 km/h
MondaySep 1478°F25°C54°F12°C0.06 in1.5 mm· 21%40%DrizzleWSW 4 mph7 km/h
TuesdaySep 1578°F26°C52°F11°C0.04 in1 mm· 15%35%DrizzleSSE 4 mph7 km/h
WednesdaySep 1679°F26°C52°F11°C0.05 in1.3 mm· 21%34%DrizzleSSW 4 mph7 km/h
ThursdaySep 1778°F25°C52°F11°C0.05 in1.2 mm· 18%39%FlurriesS 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: 40.1672°N, 105.1019°W·Elevation: 1519m·Timezone: America/Denver·Population: 92,088