Helena, MT 59623 Weather

Lewis and Clark County8:23 PM MDT46.59°N, 112.04°W

Current conditions

Clear
55°
Clear
Feels like 55°
High 68° Thursday·Low 44° tonight
WindSSW 5 mph
Humidity67%
Dew point45°
Visibility10 mi
Cloud cover20%
UV index0 Low
Sunrise7:55 AM
Sunset6:32 PM

Observed at Helena Regional Airport · 1 hr ago

Forecast

10-day

  • Tonight

    Mostly clear, with a low around 44. Southwest wind 1 to 6 mph.

  • Thursday

    Sunny, with a high near 68. South southeast wind 1 to 6 mph.

  • Thursday Night

    A chance of rain after 2am. Mostly cloudy. Low around 43, with temperatures rising to around 51 overnight. South southwest wind around 5 mph. Chance of precipitation is 50%.

National Weather Service forecast updated 7 hrs ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 60°
  2. 9 PM Partly Cloudy 56°
  3. 10 PM Partly Cloudy 54°
  4. 11 PM Mostly Clear 53°
  5. Thu12 AM Partly Cloudy 52°
  6. 1 AM Mostly Clear 51°
  7. 2 AM Mostly Clear 50°
  8. 3 AM Mostly Clear 48°
  9. 4 AM Mostly Clear 47°
  10. 5 AM Mostly Clear 46°
  11. 6 AM Sunny 45°
  12. 7 AM Sunny 44°
  13. 8 AM Sunny 44°
  14. 9 AM Mostly Sunny 45°
  15. 10 AM Sunny 50°
  16. 11 AM Sunny 52°
  17. 12 PM Sunny 55°
  18. 1 PM Sunny 60°
  19. 2 PM Sunny 64°
  20. 3 PM Sunny 66°
  21. 4 PM Sunny 66°
  22. 5 PM Sunny 67°
  23. 6 PM Partly Cloudy 65°
  24. 7 PM Partly Cloudy 63°

10-day forecast

Details
  1. TonightOct 21 Mostly Clear Mostly Clear44°
  2. ThuOct 22 Sunny Sunny46%43°68°
  3. FriOct 23 Rain Rain99%30°51°
  4. SatOct 24 Sunny Sunny29°45°
  5. SunOct 25 Partly Sunny Partly Sunny16%29°42°
  6. MonOct 26 Slight Chance Light Snow Slight Chance Light Snow32%31°47°
  7. TueOct 27 Chance Light Rain Chance Light Rain28%29°47°
  8. WedOct 28 Slight Chance Light Snow then Mostly Sunny Slight Chance Light Snow then Mostly Sunny<0.1 in snow18%45°
  9. ThuOct 29 Mostly sunny Mostly sunny25°42°
  10. FriOct 30 Cloudy Cloudy26°48°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near Helena

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Air quality

26
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Helena, MT reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:55 AM
Sunset 6:32 PM
Daylight 10 h 37 min (−3 min 8 s tomorrow)
Waxing Gibbous · 82% lit
Moonrise 4:29 PM Moonset 2:42 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low55° / 31°
Record high82° (2003)
Record low15° (1984)
Wettest0.63 in (1975)
Month to date1.02 in (normal 0.53 in)

Helena Airport Asos, records since 1938. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in TFX, issued 9 hrs ago

Key Messages

- It will be mostly dry across North-central, Central, and Southwestern Montana through the day on Thursday.

- It will be windy across North-central Montana on Friday.

- Widespread precipitation returns late Thursday through Friday.

- Temperatures will be well-above seasonal averages through Thursday with temperatures cooling down Friday through this weekend.

Discussion

/Issued 501 AM MDT Wed Oct 21 2026/

- Meteorological Overview:

Today over Southwestern Montana there remains Southwest flow aloft with weak zonal flow (west-east) over North-central, and Central Montana. Due to slightly stronger warm air advection today temperatures will rebound to above seasonal averages. Across North- central and Central Montana it will be dry with a low chance for showers across Southwestern Montana today. See the Forecast Confidence & Scenarios Section for details. On Thursday there remains southerly flow aloft and an upper-level trough associated with a Pacific Cold front begins to move over North-central, Central, and Southwestern Montana by Thursday evening. This will allow temperatures to remain above seasonal averages with mostly dry weather until Thursday evening. Thursday evening into Friday morning precipitation will gradually spread over North-central, Central, and Southwestern Montana.

On Friday the upper-level trough merges with a shortwave trough moving south from Canada. This combined with the cold front that moved through will bring widespread precipitation and cooler temperatures (below seasonal averages) to the area. Due to the cold front that moved through Thursday evening into Friday morning snow-levels will lower and the precipitation that falls in mountain areas on Friday will transition from rain to snow by Friday evening. On Friday there is an increasing pressure gradient and strong low-level and mid-level winds. This will bring windy conditions to North-central Montana on Friday. On Saturday an upper-level ridge begins to build in over North-central, Central, and Southwestern Montana. This will allow the area to dry out with cool temperatures lingering.

On Sunday the upper-level ridge remains over North-central, Central, and Southwestern Montana. This will keep dry and cool (below seasonal averages) weather for the area on Sunday. Monday through Tuesday an upper-level trough moves over North-central, Central, and Southwestern Montana. This will bring cooler temperatures and widespread precipitation to the area on Monday and Tuesday. -IG

- Forecast Confidence & Scenarios:

Aviation

21/18Z TAF Period

VFR conditions will continue at all terminals during this TAF period. Generally, cloud cover will be limited to a few high level clouds and winds will be mild. However, KWYS is expected to have a period of increased mid-level cloud cover between 0900-1600Z. -ESH

Preliminary Point Temps

GTF 45 74 42 50 / 0 0 30 100 CTB 39 70 38 46 / 0 0 60 90 HLN 39 71 43 51 / 10 0 40 100 BZN 38 70 40 51 / 0 0 30 100 WYS 29 62 32 46 / 10 10 70 100 DLN 38 66 41 48 / 10 0 80 100 HVR 37 73 40 55 / 0 0 20 100 LWT 45 75 43 52 / 0 0 20 100

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.