• Tue

    May 19

    75°Lo 58°

    Mostly cloudy and warmer

    Hair Frizz Weather
    • Wind
      Gust
      23 mph
    • Precip
      25%
    • Hours of Precip
      0
    more
  • Wed

    May 20

    76°Lo 50°

    Mostly cloudy, showers around

    Hair Frizz Weather
    • Wind
      Gust
      18 mph
    • Precip
      60%
    • Hours of Precip
      3
    more
  • Thu

    May 21

    66°Lo 50°

    Colder with plenty of clouds

    Hair Frizz Weather
    • Wind
      Gust
      15 mph
    • Precip
      25%
    • Hours of Precip
      0
  • Fri

    May 22

    66°Lo 47°

    Mostly sunny

    Hair Frizz Weather
    • Wind
      Gust
      9 mph
    • Precip
      20%
    • Hours of Precip
      0
    more
  • Sat

    May 23

    68°Lo 53°

    Considerable cloudiness

    Hair Frizz Weather
    • Wind
      Gust
      14 mph
    • Precip
      25%
    • Hours of Precip
      0
    more
Next Previous
Hi 66° RealFeel® 67° Precipitation 25%

Day

N

E

S

W

  • ENE 8 mph
  • Gusts: 15 mph

Colder with plenty of clouds

  • Max UV Index: 3 (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 50° RealFeel® 50° Precipitation 25%

Night

N

E

S

W

  • ENE 4 mph
  • Gusts: 5 mph

Plenty of clouds

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

Temperature History - May 21

more Historical Weather Data >
  Today Normal Record 5/21/2014
High 66° N/A N/A 73°
Low 50° N/A N/A 43°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:20 AM with 14:46 of sunlight, then sets at 8:06 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:36 AM with 14:40 of moolight, then sets at 11:16 PM

Blackstone Weather Report

Boston: Warmest Day So Far in 2015 to Unfold Monday

May 4, 2015; 11:06 AM ET

A surge of warmth into the Northeast will create Boston's warmest day so far this year on Monday. 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.