Montana · NWS TFX office

Helena, MT weather

It is 37°F and mostly clear at Helena Regional Airport as of Oct 28, 2:53 AM MDT. Overnight: Patchy Fog, low near 31°F, 1% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 12:31 AM MDT.

Updated Oct 28, 3:24 AM MDT (snapshot)

Current conditions

Temperature

37°F

Mostly Clear · feels like 33°F

Wind

SSW 5 mph

Humidity 67% · dew point 27°F

Pressure · visibility

—

Visibility 10 mi

Observed at Helena Regional Airport (KHLN), Oct 28, 2:53 AM MDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Helena forecast zone right now.

Around the NWS TFX forecast area

No active alerts in zones served by the TFX office near Helena.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. Montana has 1 active alert: see it.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Helena (local time)
TimeTempForecastPrecip. chanceWind
Wed 5 AM29°FPatchy Fog2%S 3 mph
Wed 6 AM29°FPatchy Fog2%S 2 mph
Wed 7 AM28°FPatchy Fog3%S 2 mph
Wed 8 AM28°FPatchy Fog5%SW 2 mph
Wed 9 AM30°FPatchy Fog6%SSW 2 mph
Wed 10 AM34°FSunny4%NW 1 mph
Wed 11 AM38°FMostly Sunny2%ESE 3 mph
Wed 12 PM42°FSunny5%NW 2 mph
Wed 1 PM44°FMostly Sunny5%W 5 mph
Wed 2 PM45°FMostly Sunny5%W 5 mph
Wed 3 PM47°FMostly Sunny3%W 7 mph
Wed 4 PM45°FMostly Sunny7%W 7 mph
Wed 5 PM44°FMostly Sunny9%W 6 mph
Wed 6 PM42°FPartly Cloudy4%WSW 3 mph
Wed 7 PM38°FPartly Cloudy2%WSW 3 mph
Wed 8 PM35°FPartly Cloudy0%WSW 3 mph
Wed 9 PM34°FMostly Clear0%WSW 3 mph
Wed 10 PM32°FMostly Clear0%WSW 3 mph
Wed 11 PM31°FMostly Clear0%WSW 3 mph
Thu 12 AM30°FPartly Cloudy0%WSW 2 mph
Thu 1 AM29°FPartly Cloudy0%WSW 2 mph
Thu 2 AM28°FPartly Cloudy2%WSW 2 mph
Thu 3 AM27°FAreas Of Fog2% 0 mph
Thu 4 AM26°FAreas Of Fog2% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Helena can differ.

7-day forecast

Overnight

Low 31°F

Patchy fog. Partly cloudy, with a low around 31. Southwest wind around 3 mph.

Wednesday

High 49°F·Low 28°F

Patchy fog before 10am. Mostly sunny. High near 49, with temperatures falling to around 46 in the afternoon. Southwest wind 1 to 6 mph.

Wednesday Night: Partly cloudy, with a low around 28. West southwest wind 0 to 5 mph.

Thursday

High 45°F·Low 24°F

Mostly sunny, with a high near 45. North wind 0 to 3 mph.

Thursday Night: Mostly cloudy, with a low around 24. North northwest wind 0 to 6 mph.

Friday

High 46°F·Low 27°F

Mostly cloudy, with a high near 46. Northeast wind 0 to 3 mph.

Friday Night: Mostly cloudy, with a low around 27. Northwest wind 0 to 3 mph.

Saturday

High 50°F·Low 30°F

A slight chance of rain after noon. Partly sunny, with a high near 50. North northeast wind around 2 mph.

Saturday Night: Rain likely. Mostly cloudy, with a low around 30.

Sunday

High 44°F·Low 26°F

Rain likely. Mostly cloudy, with a high near 44.

Sunday Night: A chance of rain before 5am, then a slight chance of snow. Mostly cloudy, with a low around 26.

Monday

High 44°F·Low 24°F

A slight chance of snow before 11am. Mostly sunny, with a high near 44.

Monday Night: Partly cloudy, with a low around 24.

Tuesday

High 48°F

Mostly sunny, with a high near 48.

Nearby cities

Larger cities in the area

See every city we cover in Montana, or check all active alerts.

About this forecast

Forecast office
Helena is served by the National Weather Service TFX forecast office, forecast zone MTZ319, county zone MTC049.
Location used
The Census Bureau's internal point for Helena (46.5966, -112.0218), in Lewis and Clark County. Population: 34,729 (2024 estimate), number 6 of the 7 Montana cities on this site.
Radar
Nearest NWS radar: KTFX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/46.5966,-112.0218 (forecast issued Oct 28, 12:31 AM MDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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