• Today

    Sep 19

    58°Lo 38°

    Mostly sunny and cooler

    Excellent for biking
    • Precip
      4%
    • Hours of Precip
      0
    • Wind
      Gust
      12 mph
    more
  • Sat

    Sep 20

    71°Lo 59°

    Warmer with periods of sun

    Very Good for biking
    • Precip
      9%
    • Hours of Precip
      0
    • Wind
      Gust
      23 mph
  • Sun

    Sep 21

    79°Lo 57°

    Clouds and breaks of sun

    Excellent for biking
    • Precip
      25%
    • Hours of Precip
      0
    • Wind
      Gust
      11 mph
    more
  • Mon

    Sep 22

    68°Lo 44°

    Partly sunny and not as warm

    Excellent for biking
    • Precip
      15%
    • Hours of Precip
      0
    • Wind
      Gust
      22 mph
    more
  • Tue

    Sep 23

    68°Lo 44°

    Partly sunny

    Excellent for biking
    • Precip
      12%
    • Hours of Precip
      0
    • Wind
      Gust
      15 mph
    more
Next Previous
Hi 71° RealFeel® 67° Precipitation 9%

Day

N

E

S

W

  • S 12 mph
  • Gusts: 23 mph

Breezy and warmer with times of 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 59° RealFeel® 51° Precipitation 25%

Night

N

E

S

W

  • S 13 mph
  • Gusts: 25 mph

Partly cloudy and mild

  • Max UV Index: N/A
  • Thunderstorms: 3%
  • 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 20

more Historical Weather Data >
  Today Normal Record 9/20/2013
High 71° 72° N/A 81°
Low 59° 49° N/A 51°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:31 AM with 12:17 of sunlight, then sets at 6:48 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:05 AM with 13:47 of moolight, then sets at 4:52 PM

Top Story

Ayer Weather Report

Boston: September Temperature Roller Coaster to Continue

September 19, 2014; 11:02 AM ET

In keeping with tradition, temperatures will continue their up-and-down cycle during the second half of September around Boston. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.