• Today

    Apr 18

    68°Lo 36°

    Times of clouds and sun

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

    Apr 19

    60°Lo 37°

    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 45°

    Colder with periods of rain

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

    Apr 21

    59°Lo 34°

    Warmer with a shower or two

    Low ragweed pollen levels
    • Precip
      59%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      84%
    more
  • Wed

    Apr 22

    57°Lo 35°

    Turning cloudy

    Ragweed Pollen Weather
    • Precip
      25%
    • Wind
      Speed
      12 mph
    • Cloud
      Cover
      41%
    more
Next Previous
Next 8 hours >
  Sat
12am
1am 2am 3am 4am 5am 6am 7am
  12am 1am 2am 3am 4am 5am 6am 7am
Forecast
Partly Cloudy
Cloudy
Partly Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Partly Cloudy
Temp (°F) 46° 45° 43° 43° 44° 44° 42° 41°
RealFeel® 46° 45° 43° 44° 46° 45° 44° 44°
Humidity 87% 87% 87% 88% 81% 82% 88% 97%
   
  12am 1am 2am 3am 4am 5am 6am 7am
Rain
 
0%
 
0%
 
1%
 
1%
 
1%
 
1%
 
1%
 
3%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  12am 1am 2am 3am 4am 5am 6am 7am
Wind (mph) 5 SW 4 SE 4 E 4 ESE 2 E 2 E 2 SE 1 SE
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 47% 100% 36% 99% 100% 100% 100% 74%
Dew Point 42° 41° 39° 40° 39° 39° 38° 40°
Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F

Temperature History - Apr 18

more Historical Weather Data >
  Today Normal Record 4/18/2014
High 68° N/A N/A 48°
Low 36° N/A N/A 21°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:04 AM with 13:31 of sunlight, then sets at 7:35 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:03 AM with 13:36 of moolight, then sets at 7:39 PM

Winchester Weather Report

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

April 18, 2015; 4:16 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 >

Sat. Pollen

Sat. Dust & Dander

Sat. Wind Maps