• Today

    Apr 18

    61°Lo 44°

    Times of clouds and sunshine

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
    more
  • Sun

    Apr 19

    54°Lo 41°

    Mostly sunny and cooler

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
    more
  • Mon

    Apr 20

    50°Lo 47°

    Breezy with periods of rain

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
  • Tue

    Apr 21

    62°Lo 46°

    Cloudy, brief showers; warmer

    Low ragweed pollen levels
    • Precip
      60%
    • Wind
      Speed
      13 mph
    • Cloud
      Cover
      85%
    more
  • Wed

    Apr 22

    61°Lo 45°

    Mostly cloudy

    Ragweed Pollen Weather
    • Precip
      21%
    • Wind
      Speed
      16 mph
    • Cloud
      Cover
      41%
    more
Next Previous
Hi 50° RealFeel® 36° Precipitation 71%

Day

N

E

S

W

  • ESE 21 mph
  • Gusts: 34 mph

Breezy with periods of rain from late morning on

  • Max UV Index: 2 (Low)
  • Thunderstorms: 3%
  • Precipitation: 0.58 in
  • Rain: 0.58 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 7 hrs
  • Hours of Rain: 7 hrs
Lo 47° RealFeel® 32° Precipitation 61%

Night

N

E

S

W

  • SSE 16 mph
  • Gusts: 32 mph

Breezy in the evening with rain and drizzle followed by occasional rain and a thunderstorm late

  • Max UV Index: N/A
  • Thunderstorms: 31%
  • Precipitation: 0.18 in
  • Rain: 0.18 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 3.5 hrs
  • Hours of Rain: 3.5 hrs

Temperature History - Apr 20

more Historical Weather Data >
  Today Normal Record 4/20/2014
High 50° 57° 89° (1976) 48°
Low 47° 42° 21° (1897) 39°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:56 AM with 13:35 of sunlight, then sets at 7:31 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 7:21 AM with 14:30 of moolight, then sets at 9:51 PM

Boston Weather Report

2015 Boston Marathon Forecast: Rain and Wind in Store for Runners

April 18, 2015; 10:48 AM ET

The 119th Boston Marathon will take place on Monday, April 20, and runners set to take on the historic course will face cool and rainy conditions. more >

Mon. Dust & Dander

Mon. Wind Maps