• Today

    May 22

    73°Lo 39°

    Variable clouds with a shower

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Sat

    May 23

    66°Lo 46°

    Mostly sunny

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Sun

    May 24

    79°Lo 55°

    Mostly sunny; breezy, warmer

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
  • Mon

    May 25

    78°Lo 60°

    Times of clouds and sun

    Low ragweed pollen levels
    • Precip
      14%
    • Wind
      Speed
      8 mph
    • Cloud
      Cover
      46%
    more
  • Tue

    May 26

    84°Lo 64°

    Cloudy, a t-storm in the p.m.

    Ragweed Pollen Weather
    • Precip
      51%
    • Wind
      Speed
      10 mph
    • Cloud
      Cover
      95%
    more
Next Previous
Hi 79° RealFeel® 79° Precipitation 3%

Day

N

E

S

W

  • W 14 mph
  • Gusts: 24 mph

Sunny much of the time, breezy and warmer

  • Max UV Index: 7 (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 55° RealFeel® 52° Precipitation 56%

Night

N

E

S

W

  • WSW 5 mph
  • Gusts: 12 mph

Rather cloudy with occasional rain and drizzle late

  • Max UV Index: N/A
  • Thunderstorms: 2%
  • Precipitation: 0.05 in
  • Rain: 0.05 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1.5 hrs
  • Hours of Rain: 1.5 hrs

Temperature History - May 24

more Historical Weather Data >
  Today Normal Record 5/24/2014
High 79° 71° N/A 66°
Low 55° 48° N/A 48°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:16 AM with 14:53 of sunlight, then sets at 8:09 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:28 AM with 13:37 of moolight, then sets at 1:05 AM

Chelmsford Weather Report

Boston to Start Memorial Day Weekend on a Cool Note

May 22, 2015; 6:20 AM ET

This Memorial Day holiday weekend is shaping up to start on a cool note around Boston with a rebound in temperatures to follow for Sunday. more >

Sun. Dust & Dander

Sun. Wind Maps