• Today

    Feb 12

    23°Lo 10°

    Sun mixing with clouds; cold

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Sat

    Feb 13

    18°Lo -5°

    A snow squall in the morning

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
  • Sun

    Feb 14

    9°Lo -3°

    Mostly sunny and frigid

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Mon

    Feb 15

    25°Lo 21°

    Turning cloudy; not as cold

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Tue

    Feb 16

    50°Lo 35°

    Warmer with rain

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Flurries
Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Temp (°F) 16° 18° 17° 15° 13° 12° 10°
RealFeel® -2° -8° -10° -12° -14°
Humidity 54% 47% 47% 48% 48% 47% 48% 51%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
51%
 
40%
 
34%
 
34%
 
34%
 
34%
 
37%
 
47%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 12 WNW 15 WNW 16 WNW 17 WNW 20 WNW 20 WNW 18 WNW 15 WNW
UV Index 1 1 1 2 2 1 1 0
Cloud Cover 94% 90% 81% 72% 65% 61% 61% 65%
Dew Point -1° -3° -5° -6° -8°
Middle Grid line 20 F Middle Grid line 15 F Middle Grid line 10 F Middle Grid line 5 F

Temperature History - Feb 13

more Historical Weather Data >
  Today Normal Record 2/13/2015
High 18° 36° N/A 16°
Low -5° 18° N/A

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:46 AM with 10:28 of sunlight, then sets at 5:14 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:44 AM with 13:44 of moolight, then sets at 11:28 PM

Londonderry Weather Report

Boston: Polar vortex to smack region during Valentine's Day weekend

February 12, 2016; 8:07 AM ET

The coldest air of the winter and perhaps during all of last winter will plunge across the Boston area during Valentine's Day weekend. more >

Sat. Pollen

Sat. Dust & Dander

Sat. Wind Maps