Mercersburg, PA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Mercersburg, PA in one place.
Sunny, with a high near 67. Northwest wind around 7 mph.
Local Weather Overview
This forecast page for Mercersburg, PA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 9, 2026 8:50 PM EDT.
The active forecast window currently covers Apr 11 to Apr 16, 2026 for Mercersburg, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 11 to Apr 16, 2026
- Latest sync
- Apr 9, 2026 8:50 PM EDT
- Forecast office
- CTP
- Source
- NOAA / NWS
Daily Outlook
This Week in Mercersburg
Wednesday looks like the warmest upcoming period in Mercersburg at 89 degrees F.
Saturday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Monday at about 6 to 10 mph SW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 8:50 PM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- CTP
- Radar station
- KLWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 41. Northeast wind around 3 mph.
Mostly sunny, with a high near 71.
Mostly cloudy, with a low around 57.
Mostly cloudy, with a high near 79.
A slight chance of rain showers between 8pm and 2am. Mostly cloudy, with a low around 60.
Mostly sunny, with a high near 86.
A slight chance of rain showers between 8pm and 2am. Mostly cloudy, with a low around 63.
A slight chance of rain showers after 2pm. Partly sunny, with a high near 89.
A slight chance of rain showers before 2am. Mostly cloudy, with a low around 64.
A slight chance of rain showers after 2pm. Partly sunny, with a high near 84.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Sunny
|
67°F |
7 mph
NW
|
|
Saturday Night
Apr 11
|
Mostly Clear
|
41°F |
3 mph
NE
|
|
Sunday
Apr 12
|
Mostly Sunny
|
71°F |
1 to 9 mph
SE
|
|
Sunday Night
Apr 12
|
Mostly Cloudy
|
57°F |
8 mph
S
|
|
Monday
Apr 13
|
Mostly Cloudy
|
79°F |
6 to 10 mph
SW
|
|
Monday Night
Apr 13
|
Slight Chance Rain Showers
|
60°F |
3 to 9 mph
SW
|
|
Tuesday
Apr 14
|
Mostly Sunny
|
86°F |
3 to 8 mph
SW
|
|
Tuesday Night
Apr 14
|
Slight Chance Rain Showers
|
63°F |
2 to 7 mph
SW
|
|
Wednesday
Apr 15
|
Partly Sunny then Slight Chance Rain Showers
|
89°F |
2 to 8 mph
SW
|
|
Wednesday Night
Apr 15
|
Slight Chance Rain Showers
|
64°F |
3 to 7 mph
SW
|
|
Thursday
Apr 16
|
Partly Sunny then Slight Chance Rain Showers
|
84°F |
3 to 8 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mercersburg.
