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    • Tonight

      Sep 25

      45° Lo F
      Mainly clear
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Ragweed Pollen
      • Weather
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
    • Mon

      Sep 26

      74° /62°
      Mostly sunny and pleasant
      • High
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
      More
    • Tue

      Sep 27

      73° /49°
      A little morning rain
      • High
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
      More
    • Wed

      Sep 28

      76° /60°
      Clouds and sun
      • High
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
      More
    • Thu

      Sep 29

      69° /61°
      Rain and drizzle possible
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    Sunday
    9pm
    10pm
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    4am
    Forecast Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear
    Temp (°F) 58° 55° 53° 50° 49° 48° 47° 45°
    RealFeel® 59° 56° 54° 52° 50° 49° 48° 46°
    Wind (mph) 2 NW 2 NW 2 WNW 2 WNW 2 NW 2 N 2 NNE 2 NNE
    precip
    9pm
    10pm
    11pm
    12am
    1am
    2am
    3am
    4am
    Rain
    3%
    3%
    3%
    3%
    3%
    3%
    3%
    3%
    Snow
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Ice
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    SKY
    9pm
    10pm
    11pm
    12am
    1am
    2am
    3am
    4am
    UV Index 0 0 0 0 0 0 0 0
    Cloud Cover 11% 14% 20% 20% 15% 11% 11% 11%
    Humidity 50% 60% 65% 68% 75% 77% 74% 79%
    Dew Point 40° 42° 41° 40° 41° 41° 39° 39°
    Temp °F
    9pm
    10pm
    11pm
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    60° 55° 50° 45°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 70° 72° 92° (1970) 76°
    Low 45° 52° 36° (1997) 60°

    Sunrise/Sunset

    • Sunrise: 6:50 AM
    • Sunset: 6:50 PM
    • Duration: 12:00 hr

    Moonrise/Moonset

    • Moonrise: 1:27 AM
    • Moonset: 3:54 PM
    • Duration: 14:27 hr
    Astronomy

    Princeton Weather Report

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

    September 25, 2016; 2:29 PM 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 to end this weekend. More >

    Sun. Pollen

    Sun. Dust & Dander

    Sun. Wind Maps