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      Elev 2897 ft, 47.817 °N 114.337 °W

      Elmo, MT

      Big Arm Station75°
      Updated: 4:37 PM MDT on September 9, 2026 (GMT -6)
      4 minutes ago
      76°
      45°
      75
      Feels Like 74
      Partly Cloudy
      N
      8
      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 50°f
         2% Precip. / 0 in
        Mainly clear. Low around 50F. Winds SW at 5 to 10 mph.
        Tomorrow
        Fri 09/11
        High 76°f
         2% Precip. / 0 in
        Partly cloudy skies. High 76F. Winds SW at 10 to 20 mph.
        Tomorrow night
        Fri 09/11
        Low 50°f
         56% Precip. / 0.1 in
        Cloudy in the evening, then off and on rain showers after midnight. Low near 50F. Winds SW at 5 to 10 mph. Chance of rain 60%.
        Hourly Forecast
        Now
        73°
        5PM
        74°
        6PM
        73°
        7PM
        71°
        8PM
        67°
        8:01PM
        Sunset
        9PM
        64°
        10PM
        62°
        11PM
        60°
        12AM
        57°
        1AM
        55°
        2AM
        54°
        3AM
        53°
        4AM
        53°
        5AM
        52°
        6AM
        52°
        7AM
        52°
        7:08AM
        Sunrise
        8AM
        51°
        9AM
        55°
        10AM
        59°
        11AM
        64°
        12PM
        68°
        1PM
        71°
        2PM
        73°
        3PM
        75°
        4PM
        75°
        Precipitation
        2%
        Pollen
        Grass Pollen
        Low
        Air Quality
        16
        Good
        UV Index
        2
        Low
        Additional Conditions
        1. Pressure 30.07 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point45°F
        5. Humidity 37%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KGPI Station History
        Almanac for September 9, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 76°F 74°F 91°F 1981
        4. Low 45°F 45°F 33°F 1962
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 76°F 74°F 91°F
        4. Low 45°F 45°F 30°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:06 AM 8:01 PM
        3. Civil Twilight 6:35 AM 8:32 PM
        4. Nautical Twilight 5:57 AM 9:10PM
        5. Astronomical Twilight 5:17 AM 9:50 PM
        1. Length of Visible Light 13h 57m
        2. Length of Day 12h 54m
        3. Tomorrow will be 3 minutes 25 seconds shorter
        1. Moon 5:12 AM 7:25 PM
        2. Waning Crescent3% 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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