• Tonight

    Apr 18

    Lo 43°

    Clear

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
    more
  • Sun

    Apr 19

    60°Lo 39°

    Mostly sunny and cooler

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

    Apr 20

    51°Lo 47°

    Cooler with heavy rain

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

    Apr 21

    65°Lo 42°

    Warmer with a shower or two

    Low ragweed pollen levels
    • Precip
      56%
    • Wind
      Speed
      9 mph
    • Cloud
      Cover
      84%
  • Wed

    Apr 22

    59°Lo 39°

    Mostly cloudy

    Ragweed Pollen Weather
    • Precip
      20%
    • Wind
      Speed
      13 mph
    • Cloud
      Cover
      43%
    more
Next Previous
Hi 65° RealFeel® 65° Precipitation 56%

Day

N

E

S

W

  • W 9 mph
  • Gusts: 16 mph

Mostly cloudy and warmer with a passing shower or two

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 29%
  • Precipitation: 0.05 in
  • Rain: 0.05 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs
Lo 42° RealFeel® 37° Precipitation 20%

Night

N

E

S

W

  • W 7 mph
  • Gusts: 14 mph

Turning clear

  • Max UV Index: N/A
  • Thunderstorms: 4%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 65° N/A N/A 64°
Low 42° N/A N/A 28°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:57 AM with 13:37 of sunlight, then sets at 7:34 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:10 AM with 14:44 of moolight, then sets at 10:54 PM

Blackstone Weather Report

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

April 18, 2015; 8:16 PM 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 >

Tue. Dust & Dander

Tue. Wind Maps