• Tonight

    Apr 21

    Lo 40°

    Clear

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
  • Wed

    Apr 22

    58°Lo 36°

    Afternoon showers

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

    Apr 23

    51°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

    50°Lo 37°

    Breezy with periods of sun

    Low ragweed pollen levels
    • Precip
      24%
    • Wind
      Speed
      15 mph
    • Cloud
      Cover
      53%
    more
  • Sat

    Apr 25

    55°Lo 39°

    A brief shower or two

    Ragweed Pollen Weather
    • Precip
      55%
    • Wind
      Speed
      13 mph
    • Cloud
      Cover
      69%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
2am
3am 4am 5am 6am 7am 8am 9am
  2am 3am 4am 5am 6am 7am 8am 9am
Forecast
Cloudy
Cloudy
T-storms
T-storms
Cloudy
Cloudy
Cloudy
Cloudy
Temp (°F) 50° 50° 51° 51° 50° 53° 51° 52°
RealFeel® 45° 45° 44° 44° 47° 49° 50° 52°
Humidity 90% 89% 88% 90% 92% 85% 94% 91%
   
  2am 3am 4am 5am 6am 7am 8am 9am
Rain
 
49%
 
47%
 
51%
 
51%
 
47%
 
44%
 
28%
 
28%
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) 8 ENE 8 NE 7 NE 7 NNE 7 NNE 7 NNE 5 NW 6 NNW
UV Index 0 0 0 0 0 0 0 1
Cloud Cover 99% 99% 99% 100% 99% 97% 99% 99%
Dew Point 47° 47° 47° 48° 48° 48° 49° 50°
Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 63° 60° N/A 73°
Low 40° 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 14:47 of moolight, then sets at 10:55 PM

Derry Weather Report

Boston: Cooler Air to Sweep Away Warmth This Week

April 21, 2015; 4:52 PM 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