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

46°F

8°C

Humidity 34%
Wind Speed NNW 0 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Last update 18 May 05:00 PM MDT
Extended Forecast for

4 Miles W Pompeys Pillar MT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 30. North northeast wind 5 to 9 mph becoming calm in the evening.

    Low: 30 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 68. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. Southwest wind around 5 mph becoming calm after midnight.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Cloudy through mid morning, then becoming mostly sunny, with a high near 72. West southwest wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 72 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 43. North northwest wind around 7 mph. Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 62. North wind 6 to 9 mph. Chance of precipitation is 70%.

    High: 62 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 40. North northwest wind around 6 mph becoming calm in the evening.

    Low: 40 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 70. Calm wind becoming west around 5 mph.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. Light and variable wind.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 30. North northeast wind 5 to 9 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 68. Calm wind becoming west southwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 40. Southwest wind around 5 mph becoming calm after midnight.
Wednesday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Cloudy through mid morning, then becoming mostly sunny, with a high near 72. West southwest wind 3 to 7 mph. Chance of precipitation is 20%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 43. North northwest wind around 7 mph. Chance of precipitation is 70%.
Thursday
Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 62. North wind 6 to 9 mph. Chance of precipitation is 70%.
Thursday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 40. North northwest wind around 6 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 70. Calm wind becoming west around 5 mph.
Friday Night
Partly cloudy, with a low around 43. Light and variable wind.
Saturday
Sunny, with a high near 79. Calm wind becoming west southwest around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 48. West southwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 85. Calm wind becoming west 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 50. West northwest wind 5 to 7 mph becoming light and variable after midnight.
Memorial Day
Sunny, with a high near 88. Calm wind becoming southwest 5 to 9 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Pompeys Pillar MT
 45.97°N 108.03°W (Elev. 2982 ft)
Last Update:
12:33 pm MDT May 18, 2026
Forecast Valid:
5pm MDT May 18, 2026-6pm MDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation