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      Frost Advisory
      until 9:00 AM PDT
      Elev 1476 ft, 47.941 °N 119.005 °W

      Grand Coulee, WA

      Grand Coulee Station47°
      Updated: 1:38 AM PDT on September 27, 2026 (GMT -7)
      7 minutes ago
      70°
      43°
      47
      Feels Like 44
      Clear
      N
      6
      Higher temperature is expected today
      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
        Sun 09/27
        Low 41°f
         1% Precip. / 0 in
        A few clouds. Low 41F. Winds light and variable.
        Tomorrow
        Mon 09/28
        High 70°f
         1% Precip. / 0 in
        Partly to mostly cloudy. High around 70F. Winds light and variable.
        Tomorrow night
        Mon 09/28
        Low 39°f
         2% Precip. / 0 in
        Clear skies. Low 39F. Winds light and variable.
        Hourly Forecast
        Now
        47°
        2AM
        46°
        3AM
        44°
        4AM
        44°
        5AM
        43°
        6AM
        43°
        6:50AM
        Sunrise
        7AM
        41°
        8AM
        44°
        9AM
        49°
        10AM
        54°
        11AM
        58°
        12PM
        62°
        1PM
        64°
        2PM
        66°
        3PM
        67°
        4PM
        68°
        5PM
        67°
        6PM
        66°
        6:43PM
        Sunset
        7PM
        62°
        8PM
        58°
        9PM
        55°
        10PM
        51°
        11PM
        49°
        12AM
        48°
        1AM
        46°
        Precipitation
        2%
        Pollen
        Ragweed Pollen
        Low
        Air Quality
        23
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.13 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point37°F
        5. Humidity 70%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KOMK Station History
        Almanac for September 27, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 70°F 72°F 89°F 1950
        4. Low 43°F 47°F 33°F 1972
        5. Rain/Snow Depth
        6. Precipitation 0 in - in -
        7. Snow 0 in - in -
        Almanac for September 28, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 68°F 71°F 89°F
        4. Low 43°F 47°F 34°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:49 AM 6:43 PM
        3. Civil Twilight 6:19 AM 7:13 PM
        4. Nautical Twilight 5:42 AM 7:49PM
        5. Astronomical Twilight 5:05 AM 8:26 PM
        1. Length of Visible Light 12h 54m
        2. Length of Day 11h 53m
        3. Tomorrow will be 3 minutes 27 seconds shorter
        1. Moon 6:49 PM 8:08 AM
        2. Waning Gibbous97% of the Moon is Illuminated
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Oct 25
        Full Moon
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