• Wed

    Sep 9

    85°Lo 54°

    Chance for rain and thunder

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

    Sep 10

    79°Lo 56°

    Rain and drizzle possible

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

    Sep 11

    72°Lo 53°

    Mostly sunny

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

    Sep 12

    74°Lo 53°

    Sun and clouds

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

    Sep 13

    79°Lo 59°

    Partly sunny

    Very Unlikely for a snow day
    • Snow
      0%
    • Ice
      0%
    • Snow
      0 in
    more
Next Previous
Hi 74° RealFeel® 77° Precipitation 9%

Day

N

E

S

W

  • WSW 4 mph
  • Gusts: 12 mph

Sun and clouds

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 53° RealFeel® 50° Precipitation 7%

Night

N

E

S

W

  • SW 5 mph
  • Gusts: 16 mph

Mostly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Sep 12

more Historical Weather Data >
  Today Normal Record 9/12/2014
High 74° 74° N/A 69°
Low 53° 54° N/A 52°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:22 AM with 12:39 of sunlight, then sets at 7:01 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:42 AM with 12:59 of moolight, then sets at 6:41 PM

Londonderry Weather Report

Boston: Sizzling Heat to Start September

August 30, 2015; 8:06 PM ET

September will get off to a hot and humid start around Boston this week. 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.