• Today

    Jul 27

    93°Lo 68°

    Mostly sunny and hot

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

    Jul 28

    95°Lo 70°

    A thunderstorm in spots

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

    Jul 29

    79°Lo 62°

    A couple of t-storms; cooler

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

    Jul 30

    85°Lo 62°

    Intervals of clouds and sun

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

    Jul 31

    80°Lo 65°

    Mostly cloudy, showers around

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
Hi 79° RealFeel® 91° Precipitation 64%

Day

N

E

S

W

  • NE 5 mph
  • Gusts: 8 mph

Mostly cloudy and cooler with a couple of showers and a thunderstorm

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 60%
  • Precipitation: 0.45 in
  • Rain: 0.45 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2.5 hrs
  • Hours of Rain: 2.5 hrs
Lo 62° RealFeel® 62° Precipitation 87%

Night

N

E

S

W

  • NNW 4 mph
  • Gusts: 6 mph

Mostly cloudy; heavy showers in the evening followed by a shower in spots late

  • Max UV Index: N/A
  • Thunderstorms: 29%
  • Precipitation: 1 in
  • Rain: 1 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 3.5 hrs
  • Hours of Rain: 3.5 hrs

Temperature History - Jul 29

more Historical Weather Data >
  Today Normal Record 7/29/2015
High 79° 82° N/A 93°
Low 62° 61° N/A 62°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:35 AM with 14:33 of sunlight, then sets at 8:08 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:38 AM with 14:41 of moolight, then sets at 4:19 PM

Chelmsford Weather Report

Heat wave to deteriorate across northeastern US as downpours unleash up to 2 inches of rain

July 27, 2016; 1:23 PM ET

As July draws to a close, a storm system swinging up from the Deep South will bring downpours to the northeastern U.S. and break the back of an extended heat wave. more >

Fri. Dust & Dander

Fri. Wind Maps