• Today

    Apr 21

    63°Lo 39°

    Some rain and a thunderstorm

    Fair for driving
    • Precip
      56%
    • Hours of Precip
      2
    • Rain
      0.14 in
  • Wed

    Apr 22

    62°Lo 40°

    An afternoon shower or two

    Very Good for driving
    • Precip
      65%
    • Hours of Precip
      3
    • Rain
      0.18 in
    more
  • Thu

    Apr 23

    52°Lo 35°

    Clouds and sun with a shower

    Very Good for driving
    • Precip
      40%
    • Hours of Precip
      1
    • Rain
      0.02 in
    more
  • Fri

    Apr 24

    50°Lo 35°

    Partly sunny, breezy and cool

    Excellent for driving
    • Precip
      23%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Sat

    Apr 25

    56°Lo 37°

    A passing shower or two

    Excellent for driving
    • Precip
      55%
    • Hours of Precip
      1.5
    • Rain
      0.04 in
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
11am
12pm 1pm 2pm 3pm 4pm 5pm 6pm
  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Forecast
Cloudy
T-storms
T-storms
Cloudy
Showers
Partly Cloudy
Partly Sunny
Showers
Temp (°F) 56° 58° 59° 60° 62° 63° 62° 61°
RealFeel® 56° 55° 56° 59° 59° 63° 61° 56°
Humidity 84% 77% 71% 63% 56% 50% 47% 48%
   
  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Rain
 
48%
 
52%
 
52%
 
43%
 
51%
 
47%
 
47%
 
51%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Wind (mph) 7 WNW 7 WNW 8 WNW 9 WNW 10 WNW 12 W 12 W 10 W
UV Index 1 2 2 2 3 3 2 1
Cloud Cover 99% 99% 100% 99% 85% 65% 45% 27%
Dew Point 51° 51° 49° 48° 46° 44° 42° 41°
Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 63° 60° 87° (1954) 74°
Low 39° 36° 22° (1969) 32°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:55 AM with 13:40 of sunlight, then sets at 7:35 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:08 AM with 14:48 of moolight, then sets at 10:56 PM

Merrimack Weather Report

Boston: Cooler Air to Sweep Away Warmth This Week

April 21, 2015; 5:52 AM ET

Cooler air will push into the Boston area during the middle and latter part of the week. more >

Travel Weather Forecast

Apr 21, 2015; 5:25 AM ET United States travel weather forecast

Tue. Travel Weather

48 Hour Precipitation Forecast

Tue. Driving Weather