South Mountain, PA
Unincorporated community in Franklin County, Pennsylvania
South Mountain is a small unincorporated community in Franklin County, Pennsylvania. It is 3.6 miles W of Mont Alto, the nearest town. Its ZIP code is 17261.
South Mountain at a glance
- State
- Pennsylvania
- County
- Franklin County
- ZIP code
- 17261
- Nearest town
- Mont Alto (3.6 mi)
- Time zone
- America/New York
- Coordinates
- 39.8464, -77.4881
Weather in South Mountain now
Loading the National Weather Service forecast…
South Mountain weather by the hour
South Mountain weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of South Mountain.
This week in South Mountain
Sunrise, sunset and moon in South Mountain
What is the weather usually like in South Mountain?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 81°F average high
- Januarycoldest month · 20°F average low
- 48.6 inprecipitation per year · 1,234 mm
- 33.0 insnowfall per year · 84 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit South Mountain: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station S MTN, PA US (USC00368308), adjusted for the elevation of South Mountain.
South Mountain weather month by month
Sunrise and sunset in South Mountain through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:27 AM | 5:11 PM | 9 h 43 min |
| February | 7:00 AM | 5:47 PM | 10 h 46 min |
| March | 7:19 AM | 7:18 PM | 11 h 58 min |
| April | 6:30 AM | 7:49 PM | 13 h 19 min |
| May | 5:53 AM | 8:19 PM | 14 h 26 min |
| June | 5:39 AM | 8:41 PM | 15 h 2 min |
| July | 5:52 AM | 8:39 PM | 14 h 46 min |
| August | 6:20 AM | 8:08 PM | 13 h 47 min |
| September | 6:49 AM | 7:20 PM | 12 h 30 min |
| October | 7:19 AM | 6:32 PM | 11 h 12 min |
| November | 6:53 AM | 4:55 PM | 10 h 2 min |
| December | 7:22 AM | 4:47 PM | 9 h 24 min |
Times for the 15th of each month, local time (America/New York).
What is the weather like in South Mountain?
South Mountain has a warm-summer humid continental climate. The warmest month is July, with an average high of 81°F (27°C), and the coldest is January, with average lows of 20°F (-6°C).
It gets about 48.6 inches (1,234 mm) of precipitation a year. The wettest month is September and the driest is February. Snow is common: about 33 inches fall in an average year.
The best time to visit South Mountain is June to September. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near South Mountain
The closest live webcam is Greene Township, 9.4 miles NW of South Mountain.
Webcams: Windy.com. Distances in a straight line from South Mountain.
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Map of South Mountain, PA
Tap any road on the map to see it in Street View below. Map: © OpenStreetMap contributors.
South Mountain Street View
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Questions about South Mountain
Where is South Mountain, PA?
South Mountain is an unincorporated community in Franklin County, Pennsylvania, 3.6 miles W of Mont Alto.
What county is South Mountain in?
South Mountain is in Franklin County, Pennsylvania.
What is the ZIP code of South Mountain, PA?
The ZIP code for South Mountain is 17261.
What is the nearest town to South Mountain?
Mont Alto, 3.6 miles away.
Are there webcams near South Mountain?
Yes. The closest is Greene Township, 9.4 miles away.
What is the hottest month in South Mountain?
July, with an average high of 81°F (27°C).
What is the coldest month in South Mountain?
January, with an average low of 20°F (-6°C).
How much does it rain in South Mountain?
About 48.6 inches (1,234 mm) a year; the wettest month is September.
Does it snow in South Mountain?
Yes, about 33 inches of snow fall in an average year.
When is the best time to visit South Mountain?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does South Mountain have?
Warm-summer humid continental (Köppen Dfb).
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