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      Elev 2907 ft, 47.797 °N 114.307 °W

      Big Arm, MT

      Big Arm Station73°
      Updated: 5:48 PM MDT on September 23, 2026 (GMT -6)
      6 minutes ago
      77°
      47°
      73
      Feels Like 71
      Sunny
      N
      6
      Higher temperature is expected tomorrow
      Wundermap
      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 09/24
        Low 47°f
         1% Precip. / 0 in
        Partly cloudy skies. Low 47F. Winds light and variable.
        Tomorrow
        Fri 09/25
        High 77°f
         2% Precip. / 0 in
        Generally sunny despite a few afternoon clouds. High 77F. Winds light and variable.
        Tomorrow night
        Fri 09/25
        Low 53°f
         1% Precip. / 0 in
        A few clouds. Low 53F. Winds light and variable.
        Hourly Forecast
        Now
        75°
        6PM
        74°
        7PM
        71°
        7:32PM
        Sunset
        8PM
        67°
        9PM
        62°
        10PM
        58°
        11PM
        57°
        12AM
        55°
        1AM
        54°
        2AM
        53°
        3AM
        52°
        4AM
        51°
        5AM
        50°
        6AM
        49°
        7AM
        48°
        7:27AM
        Sunrise
        8AM
        48°
        9AM
        53°
        10AM
        57°
        11AM
        61°
        12PM
        65°
        1PM
        68°
        2PM
        71°
        3PM
        73°
        4PM
        75°
        5PM
        76°
        Precipitation
        3%
        Pollen
        None
        Air Quality
        56
        Moderate
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.92 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point41°F
        5. Humidity 29%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KGPI Station History
        Almanac for September 23, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 77°F 68°F 85°F 1999
        4. Low 47°F 41°F 23°F 2000
        5. Rain/Snow Depth
        6. Precipitation 0 in 3 in -
        7. Snow 0 in 0 in -
        Almanac for September 24, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 77°F 68°F 88°F
        4. Low 47°F 41°F 27°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:25 AM 7:32 PM
        3. Civil Twilight 6:54 AM 8:03 PM
        4. Nautical Twilight 6:18 AM 8:39PM
        5. Astronomical Twilight 5:40 AM 9:16 PM
        1. Length of Visible Light 13h 8m
        2. Length of Day 12h 6m
        3. Tomorrow will be 3 minutes 26 seconds shorter
        1. Moon 6:23 PM 3:50 AM
        2. Waxing Gibbous92% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
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