• Today

    Sep 1

    85°Lo 59°

    Sunny

    Excellent for biking
    • Precip
      7%
    • Hours of Precip
      0
    • Wind
      Gust
      8 mph
    more
  • Wed

    Sep 2

    91°Lo 65°

    Mostly sunny, hot and humid

    Very Good for biking
    • Precip
      3%
    • Hours of Precip
      0
    • Wind
      Gust
      8 mph
    more
  • Thu

    Sep 3

    88°Lo 60°

    Sunny intervals, a t-storm

    Good for biking
    • Precip
      57%
    • Hours of Precip
      2
    • Wind
      Gust
      6 mph
    more
  • Fri

    Sep 4

    76°Lo 51°

    Sunny and not as warm

    Excellent for biking
    • Precip
      8%
    • Hours of Precip
      0
    • Wind
      Gust
      14 mph
  • Sat

    Sep 5

    80°Lo 57°

    Plenty of sunshine

    Excellent for biking
    • Precip
      6%
    • Hours of Precip
      0
    • Wind
      Gust
      4 mph
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
9am
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Mostly Sunny
Mostly Sunny
Sunny
Sunny
Sunny
Sunny
Sunny
Sunny
Temp (°F) 64° 65° 68° 70° 72° 73° 74° 76°
RealFeel® 64° 67° 71° 75° 77° 79° 79° 79°
Humidity 77% 72% 67% 62% 58% 55% 53% 49%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 9 ENE 9 ENE 8 ENE 7 ENE 7 E 6 E 6 E 6 ESE
UV Index 2 3 4 5 6 5 4 3
Cloud Cover 21% 10% 2% 0% 0% 1% 1% 1%
Dew Point 57° 56° 56° 57° 56° 56° 56° 56°
Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F

Temperature History - Sep 4

more Historical Weather Data >
  Today Normal Record 9/4/2014
High 76° 77° N/A 84°
Low 51° 57° N/A 58°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:13 AM with 13:02 of sunlight, then sets at 7:15 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:17 PM with 14:44 of moolight, then sets at 2:01 PM

Londonderry Weather Report

Boston: Sizzling Heat to Start September

September 1, 2015; 1:34 AM ET

July-like warmth and humidity will continue around Boston for the first week of September. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.