• Today

    May 31

    67°Lo 46°

    Cooler; an afternoon t-storm

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      5 - High
  • Wed

    Jun 1

    70°Lo 47°

    A thunderstorm in spots

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      5 - High
    more
  • Thu

    Jun 2

    81°Lo 54°

    Partly sunny and warmer

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      5 - High
    more
  • Fri

    Jun 3

    83°Lo 48°

    Sunny to partly cloudy

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      5 - High
    more
  • Sat

    Jun 4

    79°Lo 49°

    Mostly sunny and pleasant

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
Hi 67° RealFeel® 79° Precipitation 56%

Day

N

E

S

W

  • ENE 4 mph
  • Gusts: 8 mph

Cooler with variable cloudiness; a shower or thunderstorm around this afternoon

  • Max UV Index: 8 (Very High)
  • Thunderstorms: 60%
  • Precipitation: 0.08 in
  • Rain: 0.08 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 46° RealFeel® 47° Precipitation 41%

Night

N

E

S

W

  • N 4 mph
  • Gusts: 7 mph

Partly cloudy with a shower or thunderstorm in spots

  • Max UV Index: N/A
  • Thunderstorms: 40%
  • Precipitation: 0.1 in
  • Rain: 0.1 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1.5 hrs
  • Hours of Rain: 1.5 hrs

Boulder Pollen Levels - May 31

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

    High

  • Ragweed Pollen

    Low

  • Mold

    Low

  • Grass Pollen

    Low

Temperature History - May 31

more Historical Weather Data >
  Today Normal Record 5/31/2015
High 67° 76° N/A 84°
Low 46° 47° N/A 50°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:34 AM with 14:50 of sunlight, then sets at 8:24 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:42 AM with 12:36 of moolight, then sets at 3:18 PM

Tue. Pollen

Tue. Dust & Dander

Tue. Wind Maps