• Thu

    May 14

    77°Lo 44°

    Cloudy and warmer

    Watch for hair frizz
    • Wind
      Gust
      12 mph
    • Precip
      2%
    • Hours of Precip
      0
    more
  • Fri

    May 15

    70°Lo 50°

    Sunny

    Advisory for hair frizz
    • Wind
      Gust
      15 mph
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Sat

    May 16

    67°Lo 58°

    Mostly cloudy

    Advisory for hair frizz
    • Wind
      Gust
      24 mph
    • Precip
      4%
    • Hours of Precip
      1
    more
  • Sun

    May 17

    82°Lo 57°

    Cloudy and warmer

    Advisory for hair frizz
    • Wind
      Gust
      33 mph
    • Precip
      6%
    • Hours of Precip
      0
    more
  • Mon

    May 18

    58°Lo 55°

    Colder with showers around

    Watch for hair frizz
    • Wind
      Gust
      24 mph
    • Precip
      60%
    • Hours of Precip
      2
Next Previous
Hi 58° RealFeel® 59° Precipitation 60%

Day

N

E

S

W

  • NNE 7 mph
  • Gusts: 24 mph

Cloudy and colder with a couple of showers

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 20%
  • Precipitation: 0.08 in
  • Rain: 0.08 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs
Lo 55° RealFeel® 53° Precipitation 25%

Night

N

E

S

W

  • NNE 6 mph
  • Gusts: 18 mph

Cloudy

  • 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 18

more Historical Weather Data >
  Today Normal Record 5/18/2014
High 58° 69° N/A 71°
Low 55° 48° N/A 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:20 AM with 14:44 of sunlight, then sets at 8:04 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:56 AM with 14:42 of moolight, then sets at 8:38 PM

Derry Weather Report

Boston: Temperatures to Throttle Back After 80-Degree Warmth

May 4, 2015; 5:24 PM ET

Following the first 80-degree day since last September, highs for much of the balance of the week will be in the comfortable 70s 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.