• Today

    Dec 21

    40°Lo 27°

    Clouds giving way to some sun

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
  • Mon

    Dec 22

    42°Lo 38°

    A touch of afternoon rain

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Tue

    Dec 23

    53°Lo 48°

    Mostly cloudy and misty

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Wed

    Dec 24

    61°Lo 50°

    Breezy with rain

    Low ragweed pollen levels
    • Precip
      85%
    • Wind
      Speed
      14 mph
    • Cloud
      Cover
      99%
    more
  • Thu

    Dec 25

    53°Lo 35°

    Clouds breaking and windy

    Ragweed Pollen Weather
    • Precip
      25%
    • Wind
      Speed
      18 mph
    • Cloud
      Cover
      60%
    more
Next Previous
Hi 40° RealFeel® 36° Precipitation 4%

Day

N

E

S

W

  • NNW 6 mph
  • Gusts: 12 mph

Clouds giving way to some sun

  • Max UV Index: 1 (Low)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 27° RealFeel® 27° Precipitation 2%

Night

N

E

S

W

  • NE 4 mph
  • Gusts: 6 mph

Partly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Williamstown Pollen Levels - December 21

  • Extreme
  • Very High
  • High
  • Moderate
  • Low
  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    Low

  • Mold

    Pollen

    Low

Temperature History - Dec 21

more Historical Weather Data >
  Today Normal Record 12/21/2013
High 40° 42° N/A 68°
Low 27° 26° N/A 51°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:17 AM with 9:22 of sunlight, then sets at 4:39 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:31 AM with 10:12 of moolight, then sets at 4:43 PM

Williamstown Weather Report

Philly: Christmas Eve Storm to Affect Holiday Travel This Week

December 21, 2014; 3:18 PM ET

Holiday travel will be at risk across the Philadelphia area this week as a strong storm takes shape and blasts through the Northeast. more >

Sun. Pollen

Sun. Dust & Dander

Sun. Wind Maps