Chambersburg, IN Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Chambersburg, IN in one place.
Mostly sunny, with a high near 93. Heat index values as high as 100. Southwest wind around 3 mph.
Local Weather Overview
This forecast page for Chambersburg, IN 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: Sep 15, 2026 3:33 PM EDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Chambersburg, IN.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 3:33 PM EDT
- Forecast office
- LMK
- Source
- NOAA / NWS
Daily Outlook
This Week in Chambersburg
Thursday looks like the warmest upcoming period in Chambersburg at 95 degrees F.
Monday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Monday at about 6 mph N.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 3:33 PM EDT
- Coverage
- 6 days
- Time zone
- America/Indiana/Indianapolis
- Forecast office
- LMK
- Radar station
- KLVX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 71. South wind around 1 mph.
Sunny, with a high near 95. Southwest wind around 3 mph.
Partly cloudy, with a low around 71.
Mostly sunny, with a high near 90.
Mostly clear, with a low around 68.
Sunny, with a high near 91.
Partly cloudy, with a low around 70.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 77. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 58.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Mostly Sunny
|
93°F |
3 mph
SW
|
|
Wednesday Night
Sep 16
|
Partly Cloudy
|
71°F |
1 mph
S
|
|
Thursday
Sep 17
|
Sunny
|
95°F |
3 mph
SW
|
|
Thursday Night
Sep 17
|
Partly Cloudy
|
71°F |
1 mph
N
|
|
Friday
Sep 18
|
Mostly Sunny
|
90°F |
2 mph
NE
|
|
Friday Night
Sep 18
|
Mostly Clear
|
68°F |
2 mph
E
|
|
Saturday
Sep 19
|
Sunny
|
91°F |
3 mph
S
|
|
Saturday Night
Sep 19
|
Partly Cloudy
|
70°F |
3 mph
SW
|
|
Sunday
Sep 20
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
87°F |
5 mph
SW
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
64°F |
5 mph
N
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
77°F |
6 mph
N
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
58°F |
6 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chambersburg.