• Today

    Dec 19

    35°Lo 20°

    Clouds giving way to some sun

    Very Unlikely for a snow day
    • Snow
      2%
    • Ice
      0%
    • Snow
      0 in
    more
  • Sat

    Dec 20

    34°Lo 23°

    Sunshine mixing with clouds

    Very Unlikely for a snow day
    • Snow
      9%
    • Ice
      0%
    • Snow
      0 in
  • Sun

    Dec 21

    34°Lo 23°

    Partly sunny

    Very Unlikely for a snow day
    • Snow
      21%
    • Ice
      0%
    • Snow
      0 in
    more
  • Mon

    Dec 22

    37°Lo 28°

    Some sun, then clouds

    Very Unlikely for a snow day
    • Snow
      11%
    • Ice
      0%
    • Snow
      0 in
    more
  • Tue

    Dec 23

    41°Lo 37°

    Mostly cloudy, rain possible

    Very Unlikely for a snow day
    • Snow
      23%
    • Ice
      0%
    • Snow
      0 in
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
4am
5am 6am 7am 8am 9am 10am 11am
  4am 5am 6am 7am 8am 9am 10am 11am
Forecast
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 22° 21° 20° 20° 22° 25° 28° 31°
RealFeel® 20° 19° 19° 19° 21° 25° 30° 34°
Humidity 81% 82% 82% 82% 78% 70% 63% 58%
   
  4am 5am 6am 7am 8am 9am 10am 11am
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
1%
 
1%
 
1%
 
1%
 
1%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  4am 5am 6am 7am 8am 9am 10am 11am
Wind (mph) 5 NNW 4 NNW 4 NNW 4 NNW 4 N 4 N 4 N 4 N
UV Index 0 0 0 0 0 0 1 1
Cloud Cover 26% 26% 26% 25% 25% 25% 25% 25%
Dew Point 17° 16° 15° 16° 16° 16° 17° 18°
Middle Grid line 35 F Middle Grid line 30 F Middle Grid line 25 F Middle Grid line 20 F Middle Grid line 15 F

Temperature History - Dec 20

more Historical Weather Data >
  Today Normal Record 12/20/2013
High 34° 37° N/A 42°
Low 23° 21° N/A 28°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:12 AM with 9:02 of sunlight, then sets at 4:14 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:23 AM with 10:02 of moolight, then sets at 3:25 PM

Londonderry Weather Report

Boston: Quiet Weekend Weather to be Followed by Christmas Eve Storm

December 19, 2014; 4:08 PM ET

Following benign weather this weekend, a major storm will affect Boston, much of the East and Midwest on Christmas Eve. more >

The 540 Snow Line

Dec 20, 2012; 5:00 AM ET The 540 line is often used by meteorologists to determine the chances of rain vs. snow.

48 Hour Precipitation Forecast

Sat. Snow Day Potential