• Tonight

    May 21

    Lo 56°

    A little rain late

    Dust & Dander Weather
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
  • Wed

    May 22

    80°Lo 64°

    Warmer with a thunderstorm

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

    May 23

    74°Lo 61°

    Variable clouds, a t-storm

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

    May 24

    68°Lo 49°

    Breezy with periods of rain

    Extreme indoor dust & dander levels
    • Precip
      67%
    • Wind
      Speed
      15 mph
    • Cloud
      Cover
      76%
    more
  • Sat

    May 25

    65°Lo 46°

    Some sun with a shower

    Extreme indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      9 mph
    • Cloud
      Cover
      45%
    more
Next Previous
Hi 65° RealFeel® 69° Precipitation 50%

Day

N

E

S

W

  • ENE 9 mph
  • Gusts: 28 mph

Cooler with times of clouds and sun; a passing thunderstorm this afternoon

  • Max UV Index: 6 (High)
  • Thunderstorms: 60%
  • Precipitation: 0.01 in
  • Rain: 0.01 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs
Lo 56° RealFeel® 54° Precipitation 55%

Night

N

E

S

W

  • ENE 5 mph
  • Gusts: 18 mph

Some clouds with a little rain late

  • Max UV Index: N/A
  • Thunderstorms: 24%
  • Precipitation: 0.02 in
  • Rain: 0.02 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs

Boston Pollen Levels - May 21

  • Extreme
  • Very High
  • High
  • Moderate
  • Low
  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    High

  • Mold

    Pollen

    Low

Temperature History - May 21

more Historical Weather Data >
  Today Normal Record 5/21/2012
High 65° 68° 93° (1921) 59°
Low 56° 51° 41° (1907) 54°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:17 AM with 14:48 of sunlight, then sets at 8:05 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:10 PM with 11:12 of moolight, then sets at 3:22 AM

Top Story

Boston Weather Report

Severe Storms to Reach DC, NYC, Albany Thursday

May 21, 2013; 5:20 PM ET

The same storm system responsible for producing violent thunderstorms in Oklahoma recently will reach the Atlantic Seaboard Thursday. more >

Smoke Alert: The Hidden Dangers of E-Cigarettes

May 20, 2013; 5:00 AM ET E-cigarette manufacturers claim the devices can help a person quit smoking but have those claims ever been proven?

Tue. Pollen

Tue. Dust & Dander

Tue. Wind Maps