• Tonight

    Apr 21

    Lo 45°

    Clear

    Migraine Headache Weather
    • Hi
      RealFeel
      66°
    • UV
      7 - High
    • Cloud
      Cover
      50%
  • Wed

    Apr 22

    62°Lo 35°

    Rain and a thunderstorm

    Beneficial weather for migraines
    • Hi
      RealFeel
      61°
    • UV
      5 - Moderate
    • Cloud
      Cover
      80%
    more
  • Thu

    Apr 23

    52°Lo 33°

    Partly sunny; windy, cooler

    Beneficial weather for migraines
    • Hi
      RealFeel
      46°
    • UV
      7 - High
    • Cloud
      Cover
      26%
    more
  • Fri

    Apr 24

    51°Lo 33°

    Breezy with periods of sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      49°
    • UV
      6 - High
    • Cloud
      Cover
      46%
    more
  • Sat

    Apr 25

    55°Lo 36°

    Mostly cloudy and cool

    Beneficial weather for migraines
    • Hi
      RealFeel
      55°
    • UV
      6 - High
    • Cloud
      Cover
      76%
    more
Next Previous
Hi 66° RealFeel® 66° Precipitation 25%

Day

N

E

S

W

  • W 14 mph
  • Gusts: 30 mph

Breezy with intervals of clouds and sunshine

  • Max UV Index: 7 (High)
  • Thunderstorms: 4%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 45° RealFeel® 42° Precipitation 10%

Night

N

E

S

W

  • SSW 7 mph
  • Gusts: 15 mph

Clear

  • Max UV Index: N/A
  • Thunderstorms: 4%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 66° 65° N/A 70°
Low 45° 43° N/A 31°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:14 AM with 13:30 of sunlight, then sets at 7:44 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:30 AM with 14:33 of moolight, then sets at 11:03 PM

Williamstown Weather Report

Philadelphia: Cooler Air to Sweep Away Warmth This Week

April 21, 2015; 4:04 PM ET

Cooler air will push into the Philadelphia area during the middle and latter part of the week. more >

Tue. Migraine Headache

Tue. UV Index