0

Hourly Weather Forecast - Mercersburg, PA

  • Temperature
    25°F
    Precipitation
    10%
    Wind
    9mph
    NW
    Arrow up

    Mostly Cloudy

    Humidity
    64%
    Feels like
    16°F
    Dew Point
    15°F

  • Partly Cloudy

    Humidity
    61%
    Feels like
    14°F
    Dew Point
    13°F

  • Partly Cloudy

    Humidity
    57%
    Feels like
    13°F
    Dew Point
    11°F

  • Partly Cloudy

    Humidity
    54%
    Feels like
    12°F
    Dew Point
    10°F

  • Partly Cloudy

    Humidity
    52%
    Feels like
    11°F
    Dew Point
    8°F

  • Partly Cloudy

    Humidity
    51%
    Feels like
    10°F
    Dew Point
    7°F

  • Partly Cloudy

    Humidity
    49%
    Feels like
    8°F
    Dew Point
    5°F

  • Partly Cloudy

    Humidity
    48%
    Feels like
    7°F
    Dew Point
    4°F

  • Partly Cloudy

    Humidity
    48%
    Feels like
    6°F
    Dew Point
    3°F

  • Partly Cloudy

    Humidity
    50%
    Feels like
    6°F
    Dew Point
    3°F

  • Mostly Clear

    Humidity
    52%
    Feels like
    5°F
    Dew Point
    4°F

  • Mostly Clear

    Humidity
    55%
    Feels like
    4°F
    Dew Point
    4°F

  • Mostly Clear

    Humidity
    59%
    Feels like
    4°F
    Dew Point
    5°F

  • Mostly Clear

    Humidity
    60%
    Feels like
    4°F
    Dew Point
    6°F

  • Mostly Clear

    Humidity
    61%
    Feels like
    4°F
    Dew Point
    6°F

  • Partly Cloudy

    Humidity
    62%
    Feels like
    4°F
    Dew Point
    6°F

  • Partly Cloudy

    Humidity
    61%
    Feels like
    5°F
    Dew Point
    6°F

Top Stories

Right Arrow
Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

Extreme cold paired with their wind chill values will shiver much of the nation.

Read More
Snowfall forecast through Monday evening.

Mid-Atlantic, Great Lakes Snow Piles Up

Read More
Sunday Weather Outlook

Today's Weather Outlook

Read More
How to Measure Snow via NWS

How To Measure Snow

Read More
Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

Read More
A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

Read More
More NewsRight Arrow
loading ad...
Today's National Outlook
Hurricane Tracker
Allergy Forecast
Cold & Flu
Snow & Ski Forecast
Fire Updates
Traffic Cameras
Weather Cameras
Traffic Cameras
Weather Cameras
Outdoor Sports Guide