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Pennsylvania Flood Awareness Week | March 16-20, 2026

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Fair

47°F

8°C

Humidity	56%
Wind Speed	Calm
Barometer	30.10 in (1020.6 mb)
Dewpoint	32°F (0°C)
Visibility	10.00 mi
Last update	20 Mar 2:53 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

3 Miles SSW Mercersburg PA

Overnight
Low: 38 °F
Partly Cloudy
Friday
High: 67 °F
Mostly Sunny
then Rain
Likely
Friday Night
Low: 45 °F
Rain Likely
then Partly
Cloudy
Saturday
High: 61 °F
Mostly Sunny
Saturday Night
Low: 42 °F
Partly Cloudy
Sunday
High: 76 °F
Partly Sunny
Sunday Night
Low: 49 °F
Rain Likely
Monday
High: 56 °F
Rain Likely
then Chance
Rain
Monday Night
Low: 30 °F
Mostly Clear

Detailed Forecast

Overnight

Partly cloudy, with a low around 38. Calm wind.

Friday

Rain likely, mainly after 5pm. Increasing clouds, with a high near 67. Light south wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night

Rain and thunderstorms likely before 11pm, then a slight chance of rain between 11pm and midnight. Mostly cloudy, with a low around 45. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday

Mostly sunny, with a high near 61. North wind 3 to 6 mph.

Saturday Night

Partly cloudy, with a low around 42. Calm wind.

Sunday

Partly sunny, with a high near 76.

Sunday Night

Rain likely, mainly after 2am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

Monday

Rain likely, mainly before 8am. Partly sunny, with a high near 56. Chance of precipitation is 60%.

Monday Night

Mostly clear, with a low around 30.