National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Arrow Creek Hill I-90 MP 468.6 (MTARC)

Lat: 45.78°NLon: 108.16341°WElev: 3924.0ft.

NA

49°F

9°C

Humidity 29%
Wind Speed E 11 MPH
Barometer NA
Dewpoint 18°F (-8°C)
Visibility NA
Wind Chill44°F (7°C)
Last update 09 Apr 05:30 PM MDT
Extended Forecast for

5 Miles W Pompeys Pillar MT

  • Tonight

    Tonight: Clear, with a low around 29. East northeast wind 5 to 7 mph becoming calm after midnight.

    Low: 29 °F

    Clear

  • Friday

    Friday: Mostly sunny, with a high near 70. Calm wind becoming east southeast around 6 mph in the afternoon.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 42. East southeast wind around 6 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 80. Calm wind becoming west southwest 5 to 8 mph in the afternoon. Chance of precipitation is 20%.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 47. Southwest wind 6 to 8 mph.

    Low: 47 °F

    Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of showers after noon. Mostly sunny, with a high near 70. West wind 6 to 8 mph becoming northeast in the afternoon.

    High: 70 °F

    Mostly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 44. North northeast wind 5 to 8 mph. Chance of precipitation is 70%.

    Low: 44 °F

    Showers
    Likely

  • Monday

    Monday: Showers, mainly after noon. High near 62. North northwest wind 5 to 9 mph. Chance of precipitation is 80%.

    High: 62 °F

    Chance
    Showers then
    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 41. Northeast wind 5 to 9 mph becoming light and variable after midnight. Chance of precipitation is 60%.

    Low: 41 °F

    Showers
    Likely

Detailed Forecast

Tonight
Clear, with a low around 29. East northeast wind 5 to 7 mph becoming calm after midnight.
Friday
Mostly sunny, with a high near 70. Calm wind becoming east southeast around 6 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 42. East southeast wind around 6 mph becoming calm in the evening.
Saturday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 80. Calm wind becoming west southwest 5 to 8 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 47. Southwest wind 6 to 8 mph.
Sunday
A 50 percent chance of showers after noon. Mostly sunny, with a high near 70. West wind 6 to 8 mph becoming northeast in the afternoon.
Sunday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 44. North northeast wind 5 to 8 mph. Chance of precipitation is 70%.
Monday
Showers, mainly after noon. High near 62. North northwest wind 5 to 9 mph. Chance of precipitation is 80%.
Monday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 41. Northeast wind 5 to 9 mph becoming light and variable after midnight. Chance of precipitation is 60%.
Tuesday
A 40 percent chance of showers. Partly sunny, with a high near 64. West wind 3 to 8 mph.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 40. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 63. Light west wind increasing to 6 to 11 mph in the morning.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 36. West northwest wind 7 to 9 mph. Chance of precipitation is 60%.
Thursday
A chance of rain and snow showers. Mostly cloudy, with a high near 54. Northwest wind 7 to 11 mph. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Pompeys Pillar MT
 45.97°N 108.06°W (Elev. 2986 ft)
Last Update:
2:28 pm MDT Apr 9, 2026
Forecast Valid:
5pm MDT Apr 9, 2026-6pm MDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation