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

74°F

23°C

Humidity 13%
Wind Speed NNW 5 MPH
Barometer NA
Dewpoint 20°F (-7°C)
Visibility NA
Last update 20 Apr 02:16 PM MDT
Extended Forecast for

Pompeys Pillar MT

  • This Afternoon

    This Afternoon: Sunny, with a high near 80. West southwest wind around 6 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 46. Southwest wind around 6 mph becoming east southeast in the evening.

    Low: 46 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. Southwest wind 5 to 7 mph.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 52. Southeast wind 3 to 7 mph.

    Low: 52 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 84. West southwest wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Chance of precipitation is 30%.

    High: 84 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers, mainly after midnight. Low around 40. West wind 17 to 20 mph. Chance of precipitation is 80%.

    Low: 40 °F

    Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers, mainly before noon. High near 49. Northwest wind 24 to 30 mph, with gusts as high as 41 mph. Chance of precipitation is 80%.

    High: 49 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of rain showers before 9pm, then a chance of rain and snow showers between 9pm and midnight, then a chance of snow showers after midnight. Mostly cloudy, with a low around 31. Northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Chance of precipitation is 30%.

    Low: 31 °F

    Chance
    Rain/Snow
    then Chance
    Snow Showers

  • Friday

    Friday: A 40 percent chance of snow showers. Partly sunny, with a high near 46. Northwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon.

    High: 46 °F

    Chance Snow
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 80. West southwest wind around 6 mph.
Tonight
Partly cloudy, with a low around 46. Southwest wind around 6 mph becoming east southeast in the evening.
Tuesday
Mostly sunny, with a high near 87. Southwest wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 52. Southeast wind 3 to 7 mph.
Wednesday
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 84. West southwest wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Showers, mainly after midnight. Low around 40. West wind 17 to 20 mph. Chance of precipitation is 80%.
Thursday
Showers, mainly before noon. High near 49. Northwest wind 24 to 30 mph, with gusts as high as 41 mph. Chance of precipitation is 80%.
Thursday Night
A chance of rain showers before 9pm, then a chance of rain and snow showers between 9pm and midnight, then a chance of snow showers after midnight. Mostly cloudy, with a low around 31. Northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Chance of precipitation is 30%.
Friday
A 40 percent chance of snow showers. Partly sunny, with a high near 46. Northwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 26. North northwest wind 5 to 14 mph.
Saturday
Partly sunny, with a high near 49. Light west northwest wind becoming north northwest 5 to 9 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 26. North wind 5 to 8 mph becoming calm after midnight.
Sunday
Mostly sunny, with a high near 53. Calm wind becoming north around 6 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pompeys Pillar MT
 46°N 107.94°W (Elev. 2884 ft)
Last Update:
1:18 pm MDT Apr 20, 2026
Forecast Valid:
2pm MDT Apr 20, 2026-6pm MDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation