• Today

    May 18

    52°Lo 35°

    A couple of p.m. t-storms

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

  • Sun

    May 19

    52°Lo 35°

    Thundershower

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

  • Mon

    May 20

    60°Lo 31°

    A couple of thunderstorms

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

  • Tue

    May 21

    65°Lo 35°

    Some sun

    Very High indoor dust & dander levels
    • Precip
      9%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      45%
    more

  • Wed

    May 22

    68°Lo 28°

    Clouds and sun with a t-storm

    Very High indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      8 mph
    • Cloud
      Cover
      69%
    more
Next Previous
Hi 52° RealFeel® 57° Precipitation 55%

Day

N

E

S

W

  • WSW 6 mph
  • Gusts: 22 mph

Mostly cloudy with a couple of showers and a thunderstorm this afternoon

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 45%
  • Precipitation: 0.12 in
  • Rain: 0.12 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1.5 hrs
  • Hours of Rain: 1.5 hrs
Lo 35° RealFeel® 33° Precipitation 65%

Night

N

E

S

W

  • SW 3 mph
  • Gusts: 9 mph

Mostly cloudy with a brief shower or two

  • Max UV Index: N/A
  • Thunderstorms: 29%
  • Precipitation: 0.2 in
  • Rain: 0.2 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs

West Yellowstone Pollen Levels - May 18

  • Extreme
  • Very High
  • High
  • Moderate
  • Low

  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    High

  • Mold

    Pollen

    Low

Temperature History - May 18

more Historical Weather Data >
  Today Normal Record 5/18/2012
High 52° 60° N/A 46°
Low 35° 30° N/A 41°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:53 AM with 14:56 of sunlight, then sets at 8:49 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:41 PM with 12:51 of moolight, then sets at 2:32 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.

Sat. Pollen

Sat. Dust & Dander

Sat. Wind Maps