Chambersburg Weather Forecast
- 69
- 85
Rain Showers
- 59
- 77
Rain Showers Likely
- 61
- 84
Mostly Sunny
- 64
- 88
Rain Showers Likely
- 66
- 88
Chance Thunderstorms
- 66
- 85
Chance Thunderstorms
- 66
- 88
Slight Chance Thunderstorms
Today 22 Jun Mercer
Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms late this Morning, then Showers with a chance of Thunderstorms this afternoon. Some Thunderstorms may be severe with damaging Winds this afternoon. Locally heavy rainfall possible this afternoon. Highs in the lower 80s. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 90 percent.
Tonight 22 Jun Mercer
Showers likely with a chance of Thunderstorms late this Evening, then Showers likely with a slight chance of Thunderstorms. Locally heavy rainfall possible late this evening. Near steady temperature in the lower 70s. South Winds 5 to 10 Mph. Chance of rain 70 percent.
Chambersburg Temperature Statistics
June Temperature
Trenton, Mercer County Airport (5.6 miles)
Lowest 2 June, 2026
46.7 °FAverage June
72.8 °FHighest 12 June, 2026
94.6 °F
Climate (2021–2026)
Trenton, Mercer County Airport (5.6 miles)
Average Low 2021–2026
46 °FAverage 2021–2026
55.2 °FAverage High 2021–2026
64.4 °F