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Chinook, MT Weather

It is 40°F in Chinook, MT, observed at 11 AM MDT. Today: Mostly Sunny, high 49°F, low 27°F. Hourly and 7-day forecast from the National Weather Service. Times are local (MDT).

Chinook, MT current weather

40°F

Mostly Sunny

H 49° / L 27°Feels like 36°

  • No rain expected in the next 12 hours

Observed at HARLEM (18.5 mi away), 10/28/2026, 11:00 AM MDT

Hourly forecast

NWS, updated 10/28/2026, 9:12 AM PT

  1. Now43°
  2. 1 PM46°
  3. 2 PM47°
  4. 3 PM48°
  5. 4 PM48°
  6. 5 PM46°
  7. 6 PM44°
  8. 7 PM40°
  9. 8 PM35°
  10. 9 PM34°
  11. 10 PM33°
  12. 11 PM33°
  13. 12 AM32°Thu
  14. 1 AM31°
  15. 2 AM30°
  16. 3 AM29°
  17. 4 AM29°
  18. 5 AM29°
  19. 6 AM28°
  20. 7 AM28°
  21. 8 AM28°
  22. 9 AM30°
  23. 10 AM32°
  24. 11 AM34°
  25. 12 PM36°
  26. 1 PM39°
  27. 2 PM39°
  28. 3 PM40°
  29. 4 PM41°
  30. 5 PM40°
  31. 6 PM38°
  32. 7 PM35°
  33. 8 PM32°
  34. 9 PM29°
  35. 10 PM28°
  36. 11 PM28°
  37. 12 AM28°Fri
  38. 1 AM27°
  39. 2 AM26°
  40. 3 AM25°
  41. 4 AM25°
  42. 5 AM25°
  43. 6 AM25°
  44. 7 AM26°
  45. 8 AM26°
  46. 9 AM28°
  47. 10 AM31°
  48. 11 AM34°

7-day forecast

Tap a day for details

  • Today10/28Low 27°High 49°

    This Afternoon: Mostly sunny. High near 49, with temperatures falling to around 46 in the afternoon. West northwest wind 7 to 10 mph.

    Tonight: Partly cloudy, with a low around 27. Northeast wind around 5 mph.

    Mostly Sunny
  • Thu10/29Low 23°High 42°

    Thursday: Mostly cloudy, with a high near 42. Northwest wind around 5 mph.

    Thursday Night: Mostly cloudy, with a low around 23. East wind around 6 mph.

    Mostly Cloudy
  • Fri10/30Low 27°High 45°

    Friday: Mostly cloudy, with a high near 45. East southeast wind 9 to 16 mph, with gusts as high as 26 mph.

    Friday Night: Mostly cloudy, with a low around 27. Southeast wind 2 to 12 mph, with gusts as high as 21 mph.

    Mostly Cloudy
  • Sat10/3138% chance of precipitationLow 30°High 50°

    Saturday: Mostly sunny, with a high near 50. West wind around 3 mph.

    Saturday Night: A chance of rain after midnight. Mostly cloudy, with a low around 30. East southeast wind around 2 mph.

    Mostly Sunny
  • Sun11/149% chance of precipitationLow 30°High 49°

    Sunday: A chance of rain. Mostly cloudy, with a high near 49.

    Sunday Night: A chance of rain. Mostly cloudy, with a low around 30.

    Chance Light Rain
  • Mon11/231% chance of precipitationLow 28°High 48°

    Monday: A chance of rain. Partly sunny, with a high near 48.

    Monday Night: A slight chance of rain before 11pm. Partly cloudy, with a low around 28.

    Chance Light Rain
  • Tue11/312% chance of precipitationLow 28°High 50°

    Tuesday: Mostly sunny, with a high near 50.

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

    Mostly Sunny

Forecast for 48.592, -109.232 from the NWS TFX office, updated 10/28/2026, 9:12 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. Now43°Mostly Sunny0%9 mph
  2. 1 PM46°Mostly Sunny0%9 mph
  3. 2 PM47°Mostly Sunny1%9 mph
  4. 3 PM48°Mostly Sunny1%10 mph
  5. 4 PM48°Sunny0%9 mph
  6. 5 PM46°Mostly Sunny0%7 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 (last 50 min) and GOES

Latest

Frequently asked questions

What is the weather in Chinook, MT right now?
The latest observation from HARLEM was 40°F, reported at 10/28/2026, 11:00 AM MDT.
What is the high temperature today in Chinook, MT?
The National Weather Service forecast for this afternoon calls for a high near 49°F. Mostly Sunny.
Will it rain in Chinook, 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 Chinook, MT today?
Sunrise is about 7:57 AM MDT and sunset is about 6:03 PM MDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Chinook, MT?
At Chinook, the 1991 to 2020 normal high in October is 57°F and the normal low is 29°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

UV and air quality forecast

EPA and AirNow

UV index today (Chinook)
2Low
  1. 111a
  2. 112p
  3. 21p
  4. 22p
  5. 13p
  6. 14p

UV index guide · Air quality

Drought

By county

Blaine County, week of 10/20/2026

88% of the county is abnormally dry. No drought.

Sun and moon

Local time, center of the area

Sunrise
7:57 AM
Sunset
6:03 PM
Daylight
10 hr 6 min
Moon
Waning Gibbous 93% lit
First light (civil dawn)
7:24 AM
Last light (civil dusk)
6:36 PM
Moonrise
7:06 PM
Moonset
11:31 AM

Normal October weather

Climate

Normal October high 57°, low 29°, precipitation 0.88 in for the month. 1991 to 2020 normals at Chinook, 0 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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