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

61°F

16°C

Humidity 24%
Wind Speed E 14 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Last update 21 Mar 10:45 AM MDT
Extended Forecast for

5 Miles W Pompeys Pillar MT

  • Today

    Today: Scattered showers, mainly after 4pm. Partly sunny, with a high near 69. East northeast wind 7 to 12 mph becoming north 16 to 21 mph in the afternoon. Chance of precipitation is 30%.

    High: 69 °F

    Scattered
    Showers

  • Tonight

    Tonight: Showers likely, mainly before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 34. North wind 15 to 20 mph becoming light and variable after midnight. Chance of precipitation is 60%.

    Low: 34 °F

    Showers
    Likely then
    Isolated
    Showers

  • Sunday

    Sunday: Sunny, with a high near 62. Light west southwest wind becoming west northwest 5 to 10 mph in the morning.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 32. North northwest wind around 6 mph becoming calm in the evening.

    Low: 32 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 67. Light and variable wind.

    High: 67 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 40. East wind around 5 mph becoming calm in the evening.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 66. Light and variable wind becoming east southeast 5 to 7 mph in the morning.

    High: 66 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43. East wind 5 to 7 mph becoming calm after midnight.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers after noon. Mostly cloudy, with a high near 71. Light and variable wind becoming northwest 8 to 13 mph in the morning.

    High: 71 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Today
Scattered showers, mainly after 4pm. Partly sunny, with a high near 69. East northeast wind 7 to 12 mph becoming north 16 to 21 mph in the afternoon. Chance of precipitation is 30%.
Tonight
Showers likely, mainly before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 34. North wind 15 to 20 mph becoming light and variable after midnight. Chance of precipitation is 60%.
Sunday
Sunny, with a high near 62. Light west southwest wind becoming west northwest 5 to 10 mph in the morning.
Sunday Night
Partly cloudy, with a low around 32. North northwest wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 67. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 40. East wind around 5 mph becoming calm in the evening.
Tuesday
Mostly cloudy, with a high near 66. Light and variable wind becoming east southeast 5 to 7 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 43. East wind 5 to 7 mph becoming calm after midnight.
Wednesday
A 20 percent chance of showers after noon. Mostly cloudy, with a high near 71. Light and variable wind becoming northwest 8 to 13 mph in the morning.
Wednesday Night
A chance of rain showers before midnight, then a slight chance of rain and snow showers between midnight and 3am, then a slight chance of rain showers after 3am. Mostly cloudy, with a low around 35. North wind 8 to 13 mph. Chance of precipitation is 30%.
Thursday
A slight chance of rain and snow showers. Partly sunny, with a high near 55. North northwest wind 8 to 14 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 29. North northeast wind 5 to 11 mph.
Friday
Mostly sunny, with a high near 58. Light and variable wind becoming west 5 to 8 mph in the morning.
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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:
8:45 am MDT Mar 21, 2026
Forecast Valid:
11am MDT Mar 21, 2026-6pm MDT Mar 27, 2026
 
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Additional Resources

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Chance of Precipitation