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    • Today

      Aug 18

      71° /38°
      Sunny and pleasant
      • 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: Low
      More
    • Sat

      Aug 19

      69° /37°F
      Mostly sunny
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
    • Sun

      Aug 20

      71° /39°
      An afternoon thunderstorm
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Mon

      Aug 21

      63° /38°
      An afternoon thunderstorm
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Tue

      Aug 22

      73° /40°
      Partly sunny and pleasant
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More

    Day

    69°Hi RealFeel® 78° Precipitation 0%
    Mostly sunny
    • Winds from the
    • SW 6 mph
    • Gusts: 10 mph
    • Max UV Index: 15 (Extreme)
    • Thunderstorms: 22%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    37°Lo RealFeel® 39° Precipitation 0%
    Patchy clouds
    • Winds from the
    • S 2 mph
    • Gusts: 7 mph
    • Max UV Index: N/A
    • Thunderstorms: 24%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Yellowstone National Park Pollen Levels Aug 19

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

      Low

    • Ragweed Pollen

      Low

    • Mold

      Low

    • Grass Pollen

      Low

    Temperature History

    more Historical Weather Data >
      Today Normal Record 8/19/2016
    High 69° 77° N/A 66°
    Low 37° 37° N/A 34°

    Sunrise/Sunset

    • Sunrise: 6:30 AM
    • Sunset: 8:23 PM
    • Duration: 13:53 hr

    Moonrise/Moonset

    • Moonrise: 4:01 AM
    • Moonset: 7:06 PM
    • Duration: 15:05 hr
    Astronomy

    Sat. Pollen

    Sat. Dust & Dander

    Sat. Wind Maps