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      Elev 2897 ft, 47.817 °N 114.337 °W

      Big Arm, MT

      Big Arm Station57°
      Updated: 9:08 PM MDT on September 9, 2026 (GMT -6)
      8 minutes ago
      74°
      43°
      57
      Feels Like 57
      Clear
      N
      5
      Similar temperature is expected tomorrow
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Thu 09/10
        Low 48°f
         1% Precip. / 0 in
        Some clouds. Low 48F. Winds light and variable.
        Tomorrow
        Fri 09/11
        High 74°f
         1% Precip. / 0 in
        Partly cloudy skies in the morning will give way to cloudy skies during the afternoon. High 74F. Winds SW at 10 to 20 mph.
        Tomorrow night
        Fri 09/11
        Low 48°f
         63% Precip. / 0.1 in
        Cloudy with occasional rain after midnight. Low 48F. Winds SW at 5 to 10 mph. Chance of rain 60%.
        Hourly Forecast
        Now
        62°
        10PM
        61°
        11PM
        59°
        12AM
        57°
        1AM
        55°
        2AM
        54°
        3AM
        53°
        4AM
        53°
        5AM
        50°
        6AM
        49°
        7AM
        50°
        7:08AM
        Sunrise
        8AM
        49°
        9AM
        54°
        10AM
        57°
        11AM
        62°
        12PM
        66°
        1PM
        69°
        2PM
        71°
        3PM
        72°
        4PM
        72°
        5PM
        72°
        6PM
        71°
        7PM
        69°
        7:59PM
        Sunset
        8PM
        66°
        9PM
        64°
        Precipitation
        11%
        Pollen
        Grass Pollen
        Low
        Air Quality
        30
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.05 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point47°F
        5. Humidity 57%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KGPI Station History
        Almanac for September 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 74°F 74°F 91°F 1981
        4. Low 43°F 45°F 30°F 2016
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 11, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 74°F 74°F 88°F
        4. Low 43°F 44°F 33°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:08 AM 7:59 PM
        3. Civil Twilight 6:36 AM 8:30 PM
        4. Nautical Twilight 5:59 AM 9:08PM
        5. Astronomical Twilight 5:19 AM 9:47 PM
        1. Length of Visible Light 13h 54m
        2. Length of Day 12h 51m
        3. Tomorrow will be 3 minutes 24 seconds shorter
        1. Moon 6:33 AM 7:42 PM
        2. New0% of the Moon is Illuminated
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Precipitation
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