• Tonight

    Apr 17

    Lo 45°

    Clear to partly cloudy

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      55°
    • Hi
      RealFeel
      63°
    • Wind
      Speed
      9 mph
    more
  • Sat

    Apr 18

    68°Lo 36°

    An afternoon shower or two

    Poor for home energy
    • Avg
      RealFeel
      54°
    • Hi
      RealFeel
      74°
    • Wind
      Speed
      10 mph
    more
  • Sun

    Apr 19

    60°Lo 35°

    Mostly sunny

    Poor for home energy
    • Avg
      RealFeel
      54°
    • Hi
      RealFeel
      71°
    • Wind
      Speed
      5 mph
  • Mon

    Apr 20

    50°Lo 47°

    Cooler; a little p.m. rain

    Fair for home energy
    • Avg
      RealFeel
      37°
    • Hi
      RealFeel
      40°
    • Wind
      Speed
      18 mph
    more
  • Tue

    Apr 21

    62°Lo 36°

    Warmer with a few showers

    Poor for home energy
    • Avg
      RealFeel
      49°
    • Hi
      RealFeel
      63°
    • Wind
      Speed
      8 mph
    more
Next Previous
Hi 60° RealFeel® 71° Precipitation 6%

Day

N

E

S

W

  • NNE 5 mph
  • Gusts: 13 mph

Mostly sunny

  • Max UV Index: 6 (High)
  • Thunderstorms: 2%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 35° RealFeel® 37° Precipitation 8%

Night

N

E

S

W

  • SSE 4 mph
  • Gusts: 9 mph

Partly 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 - Apr 19

more Historical Weather Data >
  Today Normal Record 4/19/2014
High 60° 60° 92° (1976) 62°
Low 35° 35° 22° (1990) 30°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:58 AM with 13:34 of sunlight, then sets at 7:32 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:39 AM with 14:07 of moolight, then sets at 8:46 PM

North Chelmsford Weather Report

2015 Boston Marathon Forecast: Cloudy Skies, Chilly Weather in Store for Runners

April 17, 2015; 9:58 PM ET

The 119th Boston Marathon will take place on Monday, April 20, and runners set to take on the historic course will face cool and potentially rainy conditions. more >

Energy Efficient Lightbulbs and S.A.D

Sep 8, 2012; 5:00 AM ET With shorter days and colder nights in the fall and winter, some people develop seasonal affective disorder. When shopping for lightbulbs to treat the 'winter blues,'consider energy-efficient bulbs.

Sun. Home Energy Efficiency

Sun. Degree Days

Sun. UV Index