• Today

    Aug 20

    82°Lo 56°

    Partly sunny

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      7 - Low
    more
  • Thu

    Aug 21

    76°Lo 57°

    Clouds and sun; not as warm

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      7 - Low
  • Fri

    Aug 22

    74°Lo 57°

    Clouds and sun with a shower

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      7 - Low
    more
  • Sat

    Aug 23

    74°Lo 56°

    Periods of sun with a shower

    Low ragweed pollen levels
    • Precip
      42%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      46%
    more
  • Sun

    Aug 24

    75°Lo 54°

    An afternoon shower in spots

    Ragweed Pollen Weather
    • Precip
      40%
    • Wind
      Speed
      4 mph
    • Cloud
      Cover
      69%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
2am
3am 4am 5am 6am 7am 8am 9am
  2am 3am 4am 5am 6am 7am 8am 9am
Forecast
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Cloudy
Cloudy
Cloudy
Partly Cloudy
Partly Cloudy
Temp (°F) 59° 57° 57° 57° 56° 58° 61° 64°
RealFeel® 58° 57° 57° 56° 56° 58° 62° 67°
Humidity 90% 91% 92% 93% 93% 92% 84% 75%
   
  2am 3am 4am 5am 6am 7am 8am 9am
Rain
 
2%
 
2%
 
2%
 
2%
 
2%
 
4%
 
7%
 
7%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  2am 3am 4am 5am 6am 7am 8am 9am
Wind (mph) 1 NE 1 NE 1 NE 1 NE 1 NE 1 NE 1 ENE 2 ENE
UV Index 0 0 0 0 0 0 1 2
Cloud Cover 76% 76% 76% 90% 94% 94% 70% 70%
Dew Point 56° 55° 55° 55° 54° 56° 56° 56°
Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Aug 21

more Historical Weather Data >
  Today Normal Record 8/21/2013
High 76° 81° N/A 89°
Low 57° 60° N/A 63°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:58 AM with 13:41 of sunlight, then sets at 7:39 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:23 AM with 14:44 of moolight, then sets at 5:07 PM

Top Story

Londonderry Weather Report

Heavy Rain to Avoid Boston Through Weekend

August 20, 2014; 9:13 AM ET

A wedge of dry air will slowly erode later this week and may allow spotty showers to survive the trip into Boston from the Midwest. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps