• Tonight

    Dec 21

    Lo 27°

    Mostly cloudy

    Asthma Weather
    • Hi
      RealFeel
      38°
    • UV
      1 - Low
    • Air Qual.
      Good
  • Mon

    Dec 22

    38°Lo 33°

    Mainly cloudy

    Beneficial weather for asthma
    • Hi
      RealFeel
      38°
    • UV
      1 - Low
    • Air Qual.
      Moderate
    more
  • Tue

    Dec 23

    43°Lo 40°

    Rather cloudy and misty

    Beneficial weather for asthma
    • Hi
      RealFeel
      41°
    • UV
      1 - Low
    • Air Qual.
      Good
    more
  • Wed

    Dec 24

    58°Lo 55°

    Rain

    Neutral weather for asthma
    • Hi
      RealFeel
      48°
    • UV
      0 - Low
    • Cloud
      Cover
      99%
    more
  • Thu

    Dec 25

    57°Lo 33°

    Morning rain; cloudy, windy

    Neutral weather for asthma
    • Hi
      RealFeel
      48°
    • UV
      1 - Low
    • Cloud
      Cover
      97%
    more
Next Previous
Hi 33° RealFeel® 38° Precipitation 62%

Day

N

E

S

W

  • NE 2 mph
  • Gusts: 8 mph

A little snow; watch for some freezing drizzle as well

  • Max UV Index: 1 (Low)
  • Thunderstorms: 0%
  • Precipitation: 0.01 in
  • Rain: 0 in
  • Snow: 0.1 in
  • Ice: 0 in
  • Hours of Precipitation: 3.5 hrs
  • Hours of Rain: 0 hrs
Lo 27° RealFeel® 28° Precipitation 25%

Night

N

E

S

W

  • N 1 mph
  • Gusts: 4 mph

Mostly 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 - Dec 21

more Historical Weather Data >
  Today Normal Record 12/21/2013
High 33° 37° 57° (2013) 57°
Low 27° 17° -4° (1979) 31°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:14 AM with 9:01 of sunlight, then sets at 4:15 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:25 AM with 9:55 of moolight, then sets at 4:20 PM

Merrimack Weather Report

Boston: Christmas Eve Storm to Affect Holiday Travel This Week

December 21, 2014; 5:03 PM ET

Holiday travel will be at risk across the Boston area this week as a strong storm takes shape and blasts through the Northeast. more >

The Dangers of Bus Travel

Dec 10, 2012; 5:00 AM ET While bus transportation is one of the most affordable, it is important to know which motor coach companies rank highest in safety.

Sun. Air Quality

Sun. Asthma Risk

Sun. UV Index