• Tonight

    Aug 20

    Lo 55°

    Mostly cloudy

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      7 - Low
  • Thu

    Aug 21

    76°Lo 58°

    Clouds and sun; not as warm

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      7 - Low
    more
  • Fri

    Aug 22

    74°Lo 56°

    Periods of sun with a shower

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      7 - Low
    more
  • Sat

    Aug 23

    73°Lo 54°

    Partly sunny with a shower

    Low ragweed pollen levels
    • Precip
      42%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      46%
    more
  • Sun

    Aug 24

    74°Lo 52°

    Times of clouds and sun

    Ragweed Pollen Weather
    • Precip
      25%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      69%
    more
Next Previous
Hi 81° RealFeel® 89° Precipitation 47%

Day

N

E

S

W

  • SE 3 mph
  • Gusts: 10 mph

A shower in the area late this morning; mostly sunny

  • Max UV Index: 6 (High)
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs
Lo 55° RealFeel® 55° Precipitation 24%

Night

N

E

S

W

  • N 2 mph
  • Gusts: 8 mph

Mostly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 3%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Merrimack Pollen Levels - August 20

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

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    Low

  • Mold

    Pollen

    Low

Temperature History - Aug 20

more Historical Weather Data >
  Today Normal Record 8/20/2013
High 81° 81° 95° (1955) 87°
Low 55° 57° 40° (1964) 60°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:57 AM with 13:44 of sunlight, then sets at 7:41 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:33 AM with 14:52 of moolight, then sets at 4:25 PM

Top Story

Merrimack Weather Report

Heavy Rain to Avoid Boston Through Weekend

August 20, 2014; 12:04 PM ET

A wedge of dry air will slowly erode later this week and may allow spotty showers to survive the trip into Boston from the Midwest. more >

Wed. Pollen

Wed. Dust & Dander

Wed. Wind Maps