• Today

    Apr 19

    61°Lo 38°

    Mostly sunny

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

    Apr 20

    50°Lo 47°

    Becoming windier with rain

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

    Apr 21

    64°Lo 38°

    Warmer with a shower or two

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

    Apr 22

    62°Lo 40°

    Mostly cloudy and breezy

    Low ragweed pollen levels
    • Precip
      25%
    • Wind
      Speed
      14 mph
    • Cloud
      Cover
      76%
    more
  • Thu

    Apr 23

    55°Lo 35°

    Cloudy, a shower; breezy

    Ragweed Pollen Weather
    • Precip
      40%
    • Wind
      Speed
      14 mph
    • Cloud
      Cover
      95%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
10am
11am 12pm 1pm 2pm 3pm 4pm 5pm
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Forecast
Sunny
Sunny
Sunny
Sunny
Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 50° 54° 56° 57° 58° 59° 61° 61°
RealFeel® 56° 63° 69° 70° 71° 70° 69° 65°
Humidity 42% 36% 33% 31% 30% 28% 27% 27%
   
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Rain
 
3%
 
3%
 
3%
 
2%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
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0%
 
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0%
   
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Wind (mph) 6 NNW 5 NNW 4 N 4 NNE 2 E 4 ESE 4 SE 4 SSE
UV Index 4 5 6 6 6 5 4 2
Cloud Cover 3% 1% 2% 4% 6% 11% 11% 11%
Dew Point 28° 27° 27° 27° 27° 26° 27° 27°
Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F

Temperature History - Apr 19

more Historical Weather Data >
  Today Normal Record 4/19/2014
High 61° 59° N/A 59°
Low 38° 38° N/A 31°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:58 AM with 13:34 of sunlight, then sets at 7:32 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:38 AM with 14:08 of moolight, then sets at 8:46 PM

Londonderry Weather Report

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

April 19, 2015; 9:24 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 >

Sun. Pollen

Sun. Dust & Dander

Sun. Wind Maps