• Today

    May 1

    45°Lo 27°

    A bit of snow and rain

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
  • Mon

    May 2

    57°Lo 34°

    A thunderstorm in spots

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Tue

    May 3

    65°Lo 35°

    Partly sunny

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

    May 4

    71°Lo 38°

    Mostly sunny

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

    May 5

    76°Lo 44°

    A p.m. t-storm in spots

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
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  Sun
1pm
2pm 3pm 4pm 5pm 6pm 7pm 8pm
  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Forecast
Mostly Cloudy
Rain & Snow
Cloudy
Mostly Cloudy
Mostly Cloudy
Cloudy
Cloudy
Cloudy
Temp (°F) 41° 42° 43° 44° 45° 43° 42° 40°
RealFeel® 45° 42° 45° 47° 46° 43° 41° 40°
Humidity 77% 74% 71% 66% 63% 61% 65% 69%
   
  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Rain
 
33%
 
51%
 
47%
 
40%
 
34%
 
34%
 
22%
 
0%
Snow
 
41%
 
40%
 
36%
 
33%
 
34%
 
34%
 
23%
 
3%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Wind (mph) 6 WNW 6 NW 6 NNE 6 NE 6 NE 5 NE 5 NE 5 NNE
UV Index 3 3 3 2 1 1 0 0
Cloud Cover 89% 89% 90% 89% 88% 90% 93% 70%
Dew Point 34° 34° 34° 33° 33° 31° 31° 31°
Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F Middle Grid line 35 F

Temperature History - May 1

more Historical Weather Data >
  Today Normal Record 5/1/2015
High 45° 68° N/A 61°
Low 27° 40° N/A 48°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:00 AM with 13:57 of sunlight, then sets at 7:57 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:52 AM with 11:15 of moolight, then sets at 2:07 PM

Boulder Weather Report

PHOTOS: Late-April snowstorm extends Colorado ski season into early May

May 1, 2016; 10:19 AM ET

A late-April snowstorm dumped over a foot of heavy, wet snow across parts of Colorado on Thursday into Friday, boosting snowpack for an extended ski season at local resorts. more >

Sun. Pollen

Sun. Dust & Dander

Sun. Wind Maps