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Mammoth, MT Weather

Today: Mostly Sunny, high 43°F, low 32°F. Hourly and 7-day forecast from the National Weather Service. Times are local (MDT).

Mammoth, MT current weather

42°F

Sunny

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

H 43° / L 32°

  • No rain expected in the next 12 hours

No recent station report. NWS hourly forecast updated 10/29/2026, 11:31 AM PT

Hourly forecast

NWS, updated 10/29/2026, 11:31 AM PT

  1. Now42°
  2. 3 PM42°
  3. 4 PM43°
  4. 5 PM41°
  5. 6 PM38°
  6. 7 PM37°
  7. 8 PM35°
  8. 9 PM34°
  9. 10 PM34°
  10. 11 PM33°
  11. 12 AM33°Fri
  12. 1 AM33°
  13. 2 AM33°
  14. 3 AM32°
  15. 4 AM32°
  16. 5 AM32°
  17. 6 AM32°
  18. 7 AM32°
  19. 8 AM32°12%
  20. 9 AM33°
  21. 10 AM35°
  22. 11 AM38°
  23. 12 PM40°
  24. 1 PM43°
  25. 2 PM44°
  26. 3 PM44°
  27. 4 PM45°
  28. 5 PM43°
  29. 6 PM41°16%
  30. 7 PM41°20%
  31. 8 PM39°27%
  32. 9 PM39°25%
  33. 10 PM39°
  34. 11 PM38°
  35. 12 AM38°Sat
  36. 1 AM38°11%
  37. 2 AM38°
  38. 3 AM37°15%
  39. 4 AM37°12%
  40. 5 AM37°17%
  41. 6 AM36°21%
  42. 7 AM36°21%
  43. 8 AM36°21%
  44. 9 AM36°21%
  45. 10 AM37°21%
  46. 11 AM39°21%
  47. 12 PM41°39%
  48. 1 PM42°39%

7-day forecast

Tap a day for details

  • Today10/29Low 32°High 43°

    This Afternoon: Mostly sunny, with a high near 43. South southwest wind around 6 mph.

    Tonight: Mostly cloudy, with a low around 32. South southwest wind around 5 mph.

    Mostly Sunny
  • Fri10/3027% chance of precipitationLow 36°High 46°

    Friday: Mostly sunny. High near 46, with temperatures falling to around 43 in the afternoon. South wind around 5 mph.

    Friday Night: A chance of rain before 10pm, then a slight chance of snow. Partly cloudy, with a low around 36. South southwest wind around 7 mph. Chance of precipitation is 30%.

    Mostly Sunny
  • Sat10/3158% chance of precipitationLow 37°High 44°

    Saturday: A slight chance of rain before 9am, then a slight chance of snow between 9am and noon, then a chance of rain. Partly sunny, with a high near 44. West southwest wind around 5 mph. Chance of precipitation is 40%.

    Saturday Night: A chance of rain before 9pm, then rain and snow likely. Mostly cloudy, with a low around 37. South southeast wind around 5 mph. Chance of precipitation is 60%.

    Slight Chance Light Snow then Chance Light Rain
  • Sun11/183% chance of precipitationLow 31°High 41°

    Sunday: Rain and snow. Mostly cloudy, with a high near 41. East northeast wind around 5 mph.

    Sunday Night: Rain before 8pm, then rain and snow. Mostly cloudy, with a low around 31. Northwest wind 3 to 9 mph. New snow accumulation of less than half an inch possible.

    Rain And Snow
  • Mon11/230% chance of precipitationLow 29°High 39°

    Monday: A chance of snow before 11am. Partly sunny, with a high near 39.

    Monday Night: Partly cloudy, with a low around 29.

    Chance Light Snow then Partly Sunny
  • Tue11/3Low 30°High 42°

    Tuesday: Mostly sunny, with a high near 42.

    Tuesday Night: Partly cloudy, with a low around 30.

    Mostly Sunny
  • Wed11/4Low 29°High 41°

    Wednesday: Mostly sunny, with a high near 41.

    Wednesday Night: Partly cloudy, with a low around 29.

    Mostly Sunny

Forecast for 45.670, -112.018 from the NWS TFX office, updated 10/29/2026, 11:31 AM PT · Official forecast on weather.gov

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. Now42°Sunny0%6 mph
  2. 3 PM42°Mostly Sunny0%6 mph
  3. 4 PM43°Mostly Sunny0%5 mph
  4. 5 PM41°Mostly Sunny0%3 mph
  5. 6 PM38°Mostly Cloudy0%3 mph
  6. 7 PM37°Mostly Cloudy0%3 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 Mammoth, MT?
The National Weather Service forecast for this afternoon calls for a high near 43°F. Mostly Sunny.
Will it rain in Mammoth, 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 time is sunrise and sunset in Mammoth, MT today?
Sunrise is about 8:04 AM MDT and sunset is about 6:19 PM MDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Mammoth, MT?
At Twin Bridges, the 1991 to 2020 normal high in October is 59°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: None reported

Drought

By county

Madison County, week of 10/27/2026

11% of the county is abnormally dry. No drought.

Sun and moon

Local time, center of the area

Sunrise
8:04 AM
Sunset
6:19 PM
Daylight
10 hr 15 min
Moon
Waning Gibbous 85% lit
First light (civil dawn)
7:33 AM
Last light (civil dusk)
6:49 PM
Moonrise
8:35 PM
Moonset
12:39 PM

Normal October weather

Climate

Normal October high 59°, low 28°, precipitation 0.73 in for the month. 1991 to 2020 normals at Twin Bridges, 17 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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