• Today

    May 18

    64°Lo 45°

    Rather cloudy with a shower

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      7 - Low
    more

  • Sun

    May 19

    62°Lo 45°

    Mostly cloudy with showers

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      7 - Low

  • Mon

    May 20

    69°Lo 47°

    Warmer with a passing shower

    Very High indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      7 - Low
    more

  • Tue

    May 21

    77°Lo 48°

    Partly sunny

    Very High indoor dust & dander levels
    • Precip
      7%
    • Wind
      Speed
      10 mph
    • Cloud
      Cover
      45%
    more

  • Wed

    May 22

    78°Lo 43°

    Mostly cloudy with a t-storm

    Very High indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      13 mph
    • Cloud
      Cover
      76%
    more
Next Previous
Hi 62° RealFeel® 60° Precipitation 93%

Day

N

E

S

W

  • NNW 9 mph
  • Gusts: 13 mph

Mostly cloudy with showers

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 26%
  • Precipitation: 0.5 in
  • Rain: 0.5 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 7 hrs
  • Hours of Rain: 7 hrs
Lo 45° RealFeel® 40° Precipitation 25%

Night

N

E

S

W

  • NW 7 mph
  • Gusts: 11 mph

Mostly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 14%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Great Falls Pollen Levels - May 19

  • Extreme
  • Very High
  • High
  • Moderate
  • Low

  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    Low

  • Mold

    Pollen

    Low

Temperature History - May 19

more Historical Weather Data >
  Today Normal Record 5/19/2012
High 62° 69° N/A 64°
Low 45° 44° N/A 33°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:43 AM with 15:17 of sunlight, then sets at 9:00 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:45 PM with 12:14 of moolight, then sets at 2:59 AM

How Weather Impacts Seasonal Allergy Symptoms

May 18, 2013; 5:00 AM ET If you suffer with seasonal allergies, the weather can relieve or worsen your symptoms. Marja Martinez has the details.

Sun. Pollen

Sun. Dust & Dander

Sun. Wind Maps