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Dewey, MT Weather

Today: Mostly Sunny, high 46°F, low 29°F. Hourly and 10-day forecast from the National Weather Service. Times are local (MDT).

Dewey, MT current weather

26°F

Mostly Sunny

Forecast for this hour. No recent report from a nearby station.

H 46° / L 29°

  • No rain expected in the next 12 hours

No recent station report. NWS hourly forecast updated 10/29/2026, 2:31 AM PT

Hourly forecast

NWS, updated 10/29/2026, 2:31 AM PT

  1. Now26°
  2. 7 AM24°
  3. 8 AM24°
  4. 9 AM25°
  5. 10 AM30°
  6. 11 AM36°
  7. 12 PM39°
  8. 1 PM43°
  9. 2 PM44°
  10. 3 PM45°
  11. 4 PM46°
  12. 5 PM44°
  13. 6 PM40°
  14. 7 PM38°
  15. 8 PM35°
  16. 9 PM34°
  17. 10 PM34°
  18. 11 PM34°
  19. 12 AM34°Fri
  20. 1 AM33°
  21. 2 AM33°
  22. 3 AM32°
  23. 4 AM32°
  24. 5 AM32°
  25. 6 AM30°
  26. 7 AM31°11%
  27. 8 AM31°
  28. 9 AM31°
  29. 10 AM35°
  30. 11 AM39°
  31. 12 PM43°
  32. 1 PM46°
  33. 2 PM47°
  34. 3 PM48°
  35. 4 PM47°
  36. 5 PM46°
  37. 6 PM43°22%
  38. 7 PM40°22%
  39. 8 PM39°22%
  40. 9 PM39°22%
  41. 10 PM38°22%
  42. 11 PM38°22%
  43. 12 AM37°Sat
  44. 1 AM36°
  45. 2 AM35°
  46. 3 AM34°
  47. 4 AM34°
  48. 5 AM34°

10-day forecast

Tap a day for details

  • Today10/29Low 29°High 46°

    Today: Mostly sunny, with a high near 46. Southeast wind 5 to 8 mph.

    Tonight: Mostly cloudy. Low around 29, with temperatures rising to around 32 overnight. East southeast wind around 7 mph.

    Mostly Sunny
  • Fri10/3022% chance of precipitationLow 32°High 48°

    Friday: Mostly cloudy, with a high near 48. East southeast wind around 7 mph.

    Friday Night: A slight chance of rain before midnight. Mostly cloudy, with a low around 32. South southwest wind around 6 mph. Chance of precipitation is 20%.

    Mostly Cloudy
  • Sat10/3185% chance of precipitationLow 34°High 46°

    Saturday: A chance of rain after noon. Partly sunny, with a high near 46. Southwest wind around 6 mph. Chance of precipitation is 30%.

    Saturday Night: Rain likely before 5am, then rain and snow. Mostly cloudy, with a low around 34. South wind around 7 mph. Chance of precipitation is 90%.

    Partly Sunny then Chance Light Rain
  • Sun11/185% chance of precipitationLow 27°High 40°

    Sunday: Rain and snow before 5pm, then a chance of rain and snow. Cloudy, with a high near 40. West northwest wind 5 to 8 mph.

    Sunday Night: A chance of rain and snow before 5am. Mostly cloudy, with a low around 27. Northwest wind 8 to 13 mph. Little or no snow accumulation expected.

    Rain And Snow
  • Mon11/2Low 26°High 43°

    Monday: Mostly sunny, with a high near 43.

    Monday Night: Partly cloudy, with a low around 26.

    Mostly Sunny
  • Tue11/3Low 28°High 47°

    Tuesday: Mostly sunny, with a high near 47.

    Tuesday Night: Partly cloudy, with a low around 28.

    Mostly Sunny
  • Wed11/4Low 28°High 48°

    Wednesday: Mostly sunny, with a high near 48.

    Wednesday Night: Partly cloudy, with a low around 28.

    Mostly Sunny
  • Thu11/5Model blendLow 26°High 52°

    Thursday: Partly cloudy. High near 52°. Low that night near 26°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Fri11/6Model blend13% chance of precipitationLow 25°High 50°

    Friday: Partly cloudy. High near 50°. Low that night near 25°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Sat11/7Model blend11% chance of precipitationLow 25°High 49°

    Saturday: Partly cloudy. High near 49°. Low that night near 25°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 45.775, -112.856 from the NWS TFX office, updated 10/29/2026, 2:31 AM PT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KBTM (Butte/Mooney Arpt, 22 mi), model run 10/29/2026, 2:00 AM MDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now26°Mostly Sunny1%6 mph
  2. 7 AM24°Mostly Sunny1%6 mph
  3. 8 AM24°Mostly Sunny1%6 mph
  4. 9 AM25°Mostly Sunny0%6 mph
  5. 10 AM30°Mostly Sunny0%5 mph
  6. 11 AM36°Mostly Sunny0%6 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

What is the high temperature today in Dewey, MT?
The National Weather Service forecast for today calls for a high near 46°F. Mostly Sunny.
Will it rain in Dewey, MT in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Dewey, MT?
The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 5 to Nov 7) come from the NOAA National Blend of Models, with highs of 49°F to 52°F. Model guidance this far out often changes.
What time is sunrise and sunset in Dewey, MT today?
Sunrise is about 8:07 AM MDT and sunset is about 6:22 PM MDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Dewey, MT?
At Divide, the 1991 to 2020 normal high in October is 57°F and the normal low is 28°F.

Nearby hazards

Montana hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: Sand Creek Fire (35,520 acres), Moose Fire (6,005 acres)

UV and air quality forecast

EPA and AirNow

AQI forecast today (Salmon)
40GoodPM2.5
AQI forecast tomorrow (Salmon)
39GoodPM2.5

UV index guide · Air quality

Drought

By county

Beaverhead County, week of 10/20/2026

14% of the county is abnormally dry. No drought.

Sun and moon

Local time, center of the area

Sunrise
8:07 AM
Sunset
6:22 PM
Daylight
10 hr 15 min
Moon
Waning Gibbous 88% lit
First light (civil dawn)
7:36 AM
Last light (civil dusk)
6:53 PM
Moonrise
8:38 PM
Moonset
12:43 PM

Normal October weather

Climate

Normal October high 57°, low 28°, precipitation 0.83 in for the month. 1991 to 2020 normals at Divide, 5 mi away.

Other places nearby

Data sources

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About this data

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

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