• Today

    Sep 17

    69°Lo 45°

    Sunshine and patchy clouds

    Low ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Thu

    Sep 18

    70°Lo 39°

    Mostly sunny

    Low ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
  • Fri

    Sep 19

    61°Lo 42°

    Mostly sunny

    Low ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Sat

    Sep 20

    70°Lo 57°

    Sunny to partly cloudy

    Low ragweed pollen levels
    • Precip
      14%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      25%
    more
  • Sun

    Sep 21

    77°Lo 58°

    Mostly cloudy and comfortable

    Ragweed Pollen Weather
    • Precip
      18%
    • Wind
      Speed
      8 mph
    • Cloud
      Cover
      77%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Partly Sunny
Partly Sunny
Mostly Sunny
Temp (°F) 55° 60° 65° 68° 70° 70° 70° 68°
RealFeel® 56° 62° 68° 71° 72° 72° 70° 67°
Humidity 74% 63% 55% 50% 46% 44% 45% 46%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
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Ice
 
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 3 WNW 5 WNW 6 NW 6 NW 7 NW 7 NW 7 NW 8 NW
UV Index 1 2 4 5 5 4 4 2
Cloud Cover 10% 10% 10% 10% 10% 37% 30% 26%
Dew Point 47° 47° 48° 49° 48° 47° 47° 46°
Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F

Temperature History - Sep 18

more Historical Weather Data >
  Today Normal Record 9/18/2013
High 70° 72° N/A 74°
Low 39° 52° N/A 42°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:28 AM with 12:22 of sunlight, then sets at 6:50 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:12 AM with 14:32 of moolight, then sets at 3:44 PM

Top Story

Londonderry Weather Report

Boston: Remainder of Week to Be Dry, Cool

September 17, 2014; 7:15 AM ET

Rainfall will be scarce around Boston this week, but cool air will be plentiful. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps