• Today

    Apr 21

    61°Lo 37°

    Rain and a thunderstorm

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
  • Wed

    Apr 22

    59°Lo 35°

    Mostly cloudy

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

    Apr 23

    49°Lo 34°

    Clouds and sun with a shower

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

    Apr 24

    49°Lo 33°

    Chilly with periods of sun

    Low ragweed pollen levels
    • Precip
      22%
    • Wind
      Speed
      14 mph
    • Cloud
      Cover
      54%
    more
  • Sat

    Apr 25

    55°Lo 35°

    Partly sunny, a shower or two

    Ragweed Pollen Weather
    • Precip
      55%
    • Wind
      Speed
      14 mph
    • Cloud
      Cover
      69%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
10am
11am 12pm 1pm 2pm 3pm 4pm 5pm
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Forecast
Fog
Rain
Rain
Cloudy
Partly Cloudy
Partly Cloudy
Showers
Partly Sunny
Temp (°F) 56° 57° 58° 58° 58° 59° 60° 61°
RealFeel® 56° 55° 55° 58° 59° 60° 59° 60°
Humidity 81% 79% 76% 70% 65% 56% 52% 46%
   
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Rain
 
43%
 
60%
 
60%
 
49%
 
43%
 
47%
 
51%
 
47%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Wind (mph) 6 W 6 W 7 W 8 W 9 WNW 9 W 10 W 12 W
UV Index 1 1 2 2 3 3 3 2
Cloud Cover 97% 99% 100% 100% 70% 70% 49% 46%
Dew Point 50° 51° 50° 48° 46° 44° 42° 40°
Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 61° 60° N/A 73°
Low 37° 39° N/A 34°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:55 AM with 13:39 of sunlight, then sets at 7:34 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:08 AM with 14:48 of moolight, then sets at 10:56 PM

Londonderry Weather Report

Boston: Cooler Air to Sweep Away Warmth This Week

April 21, 2015; 4:52 AM ET

Cooler air will push into the Boston area during the middle and latter part of the week. more >

Tue. Pollen

Tue. Dust & Dander

Tue. Wind Maps