• Today

    May 21

    88°Lo 65°

    A thunderstorm this afternoon

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      350 - High
    more
  • Wed

    May 22

    86°Lo 66°

    Thundershower

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      350 - High
  • Thu

    May 23

    82°Lo 56°

    Showers and a heavier t-storm

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      350 - High
    more
  • Fri

    May 24

    73°Lo 43°

    Some sun returning; breezy

    Extreme indoor dust & dander levels
    • Precip
      25%
    • Wind
      Speed
      12 mph
    • Cloud
      Cover
      59%
    more
  • Sat

    May 25

    70°Lo 41°

    Mostly sunny and pleasant

    Very High indoor dust & dander levels
    • Precip
      10%
    • Wind
      Speed
      8 mph
    • Cloud
      Cover
      12%
    more
Next Previous
Hi 86° RealFeel® 93° Precipitation 60%

Day

N

E

S

W

  • SSW 6 mph
  • Gusts: 12 mph

Periods of clouds and sunshine with a shower or thunderstorm around, mainly later; warm and humid

  • Max UV Index: 7 (High)
  • Thunderstorms: 60%
  • Precipitation: 0.17 in
  • Rain: 0.17 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 66° RealFeel® 64° Precipitation 40%

Night

N

E

S

W

  • S 5 mph
  • Gusts: 10 mph

A shower or thunderstorm in spots in the evening; otherwise, mostly cloudy and humid

  • Max UV Index: N/A
  • Thunderstorms: 60%
  • Precipitation: 0.04 in
  • Rain: 0.04 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs

Frederick Pollen Levels - May 22

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

    Pollen

    Moderate

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    High

  • Mold

    Pollen

    Low

Temperature History - May 22

more Historical Weather Data >
  Today Normal Record 5/22/2012
High 86° 78° N/A 81°
Low 66° 56° N/A 64°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:50 AM with 14:33 of sunlight, then sets at 8:23 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:43 PM with 10:49 of moolight, then sets at 4:32 AM

Top Story

Frederick Weather Report

Severe Storms to Reach DC, NYC, Albany Thursday

May 21, 2013; 11:40 AM ET

The same storm system responsible for producing violent thunderstorms in Oklahoma recently will reach the Atlantic Seaboard Thursday. more >

Smoke Alert: The Hidden Dangers of E-Cigarettes

May 20, 2013; 5:00 AM ET E-cigarette manufacturers claim the devices can help a person quit smoking but have those claims ever been proven?

Wed. Pollen

Wed. Dust & Dander

Wed. Wind Maps