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    • Today

      Sep 25

      64° /41°F
      Mostly sunny
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: Low
    • Mon

      Sep 26

      66° /51°
      Sunny to partly cloudy
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Tue

      Sep 27

      68° /52°
      Periods of rain
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Wed

      Sep 28

      71° /55°
      Times of clouds and sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Thu

      Sep 29

      68° /55°
      Rain and drizzle possible
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    Sunday
    8am
    9am
    10am
    11am
    12pm
    1pm
    2pm
    3pm
    Forecast Mostly Sunny Sunny Sunny Sunny Mostly Sunny Partly Sunny Partly Cloudy Partly Cloudy
    Temp (°F) 45° 49° 53° 56° 59° 60° 62° 63°
    RealFeel® 44° 49° 53° 58° 61° 62° 62° 63°
    Wind (mph) 5 NNW 6 NNW 7 NNW 9 NNW 9 NW 10 NW 12 NW 10 NW
    precip
    8am
    9am
    10am
    11am
    12pm
    1pm
    2pm
    3pm
    Rain
    1%
    1%
    1%
    1%
    1%
    1%
    0%
    0%
    Snow
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Ice
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    SKY
    8am
    9am
    10am
    11am
    12pm
    1pm
    2pm
    3pm
    UV Index 0 1 2 3 4 4 3 3
    Cloud Cover 20% 0% 0% 0% 22% 47% 60% 51%
    Humidity 66% 55% 45% 38% 35% 32% 30% 30%
    Dew Point 34° 34° 32° 31° 31° 30° 30° 31°
    Temp °F
    8am
    9am
    10am
    11am
    12pm
    1pm
    2pm
    3pm
    65° 60° 55° 50° 45°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 64° 69° N/A 69°
    Low 41° 48° N/A 52°

    Sunrise/Sunset

    • Sunrise: 6:37 AM
    • Sunset: 6:36 PM
    • Duration: 11:59 hr

    Moonrise/Moonset

    • Moonrise: 1:07 AM
    • Moonset: 3:46 PM
    • Duration: 14:39 hr
    Astronomy

    Londonderry Weather Report

    Crisp fall air to bring first frost of season to parts of northeastern US

    September 25, 2016; 7:09 AM ET

    Fall air has finally arrived in the northeastern United States and may yield the first frost of the season in parts of the region this weekend. More >

    Sun. Pollen

    Sun. Dust & Dander

    Sun. Wind Maps