• Today

    Apr 19

    59°Lo 36°

    Mostly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      73°
    • UV
      6 - High
    • Cloud
      Cover
      17%
    more
  • Mon

    Apr 20

    50°Lo 49°

    Chilly with periods of rain

    Neutral weather for migraines
    • Hi
      RealFeel
      41°
    • UV
      3 - Moderate
    • Cloud
      Cover
      97%
  • Tue

    Apr 21

    68°Lo 37°

    Warmer with a shower or two

    Beneficial weather for migraines
    • Hi
      RealFeel
      68°
    • UV
      3 - Moderate
    • Cloud
      Cover
      95%
    more
  • Wed

    Apr 22

    61°Lo 39°

    Mostly cloudy and breezy

    Beneficial weather for migraines
    • Hi
      RealFeel
      60°
    • UV
      5 - Moderate
    • Cloud
      Cover
      76%
    more
  • Thu

    Apr 23

    55°Lo 34°

    Cloudy and breezy

    Beneficial weather for migraines
    • Hi
      RealFeel
      51°
    • UV
      5 - Moderate
    • Cloud
      Cover
      95%
    more
Next Previous
Hi 50° RealFeel® 41° Precipitation 69%

Day

N

E

S

W

  • ESE 12 mph
  • Gusts: 20 mph

Chilly with periods of rain from late morning on

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 4%
  • Precipitation: 0.47 in
  • Rain: 0.47 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 5.5 hrs
  • Hours of Rain: 5.5 hrs
Lo 49° RealFeel® 38° Precipitation 69%

Night

N

E

S

W

  • ENE 9 mph
  • Gusts: 20 mph

Periods of rain

  • Max UV Index: N/A
  • Thunderstorms: 18%
  • Precipitation: 0.44 in
  • Rain: 0.44 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 6 hrs
  • Hours of Rain: 6 hrs

Temperature History - Apr 20

more Historical Weather Data >
  Today Normal Record 4/20/2014
High 50° 60° N/A 53°
Low 49° 38° N/A 26°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:57 AM with 13:36 of sunlight, then sets at 7:33 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 7:22 AM with 14:31 of moolight, then sets at 9:53 PM

Chelmsford Weather Report

2015 Boston Marathon Forecast: Rain and Wind in Store for Runners

April 19, 2015; 4:51 AM 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 rainy conditions. more >

Mon. Migraine Headache

Mon. UV Index