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    • Today

      May 21

      74° /51°F
      Times of clouds and sun
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
    • Tue

      May 22

      73° /51°
      Partial sunshine
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
      More
    • Wed

      May 23

      70° /52°
      A thunderstorm in spots
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Thu

      May 24

      78° /55°
      Partly sunny; breezy
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Fri

      May 25

      83° /54°
      Partly sunny; very warm
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    74°Hi RealFeel® 81° Precipitation 25%
    Intervals of clouds and sunshine
    • Winds from the
    • SSE 7 mph
    • Gusts: 12 mph
    • Max UV Index: 9 (Very High)
    • Thunderstorms: 24%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    51°Lo RealFeel® 48° Precipitation 40%
    A thunderstorm in spots this evening; otherwise, partly cloudy
    • Winds from the
    • SW 7 mph
    • Gusts: 10 mph
    • Max UV Index: N/A
    • Thunderstorms: 60%
    • Precipitation: 0.04 in
    • Rain: 0.04 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0.5 hrs
    • Hours of Rain: 0.5 hrs

    Great Falls Pollen Levels May 21

    • Extreme
    • Very High
    • High
    • Moderate
    • Low
    • Tree Pollen

      Moderate

    • Ragweed Pollen

      Low

    • Mold

      Low

    • Grass Pollen

      Low

    Temperature History

    more Historical Weather Data >
      Today Normal Record 5/21/2017
    High 74° 66° 93° (1980) 71°
    Low 51° 40° 30° (2009) 40°

    Sunrise/Sunset

    • Sunrise: 5:41 AM
    • Sunset: 9:03 PM
    • Duration: 15:22 hr

    Moonrise/Moonset

    • Moonrise: 12:16 PM
    • Moonset: 2:45 AM
    • Duration: 14:29 hr
    Astronomy

    Mon. Pollen

    Mon. Dust & Dander

    Mon. Wind Maps