• Today

    Sep 21

    77°Lo 59°

    Variably cloudy with a shower

    Warning for hair frizz
    • Wind
      Gust
      9 mph
    • Precip
      46%
    • Hours of Precip
      2
    more
  • Mon

    Sep 22

    70°Lo 42°

    Breezy with clouds and sun

    Advisory for hair frizz
    • Wind
      Gust
      21 mph
    • Precip
      5%
    • Hours of Precip
      0
    more
  • Tue

    Sep 23

    69°Lo 45°

    Mostly sunny

    Watch for hair frizz
    • Wind
      Gust
      11 mph
    • Precip
      0%
    • Hours of Precip
      0
  • Wed

    Sep 24

    67°Lo 41°

    A full day of sunshine

    Watch for hair frizz
    • Wind
      Gust
      7 mph
    • Precip
      3%
    • Hours of Precip
      0
    more
  • Thu

    Sep 25

    70°Lo 48°

    A full day of sunshine

    Watch for hair frizz
    • Wind
      Gust
      7 mph
    • Precip
      7%
    • Hours of Precip
      0
    more
Next Previous
Hi 69° RealFeel® 69° Precipitation 0%

Day

N

E

S

W

  • WNW 6 mph
  • Gusts: 11 mph

Mostly sunny

  • Max UV Index: 5 (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 45° RealFeel® 43° Precipitation 5%

Night

N

E

S

W

  • NNE 4 mph
  • Gusts: 7 mph

Clear

  • Max UV Index: N/A
  • Thunderstorms: 2%
  • 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 23

more Historical Weather Data >
  Today Normal Record 9/23/2013
High 69° 70° N/A 65°
Low 45° 48° N/A 41°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:34 AM with 12:08 of sunlight, then sets at 6:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:56 AM with 12:22 of moolight, then sets at 6:18 PM

Top Story

Ayer Weather Report

Boston: September Temperature Roller Coaster to Continue

September 21, 2014; 3:42 AM ET

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

The History Behind the UV Index

Nov 12, 2012; 5:00 AM ET The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.

Tue. Hair Frizz

Tue. Wind Maps

Tue. UV Index