South Bethlehem, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Bethlehem, a borough in Armstrong County, Pennsylvania.
Today
74°F
Mostly Cloudy
Mostly cloudy, with a high near 74. Southeast wind around 6 mph.
7-day forecast for South Bethlehem
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Cloudy | 6 mph SE | 2% |
| Tonight | 61°F | Showers And Thunderstorms | 6 mph SE | 78% |
| Sunday | 74°F | Showers And Thunderstorms | 8 mph SW | 96% |
| Sunday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 8 mph N | 25% |
| Monday | 67°F | Chance Rain Showers | 8 mph NE | 26% |
| Monday Night | 49°F | Rain Showers Likely | 7 to 10 mph E | 55% |
| Tuesday | 61°F | Rain Showers Likely | 12 mph E | 57% |
| Tuesday Night | 47°F | Chance Rain Showers | 14 mph E | 52% |
| Wednesday | 59°F | Chance Rain Showers | 10 to 14 mph E | 52% |
| Wednesday Night | 47°F | Chance Rain Showers | 13 mph E | 54% |
| Thursday | 64°F | Chance Rain Showers | 10 mph E | 53% |
| Thursday Night | 47°F | Chance Showers And Thunderstorms | 7 mph E | 25% |
| Friday | 67°F | Partly Sunny then Slight Chance Rain Showers | 7 mph NE | 15% |
| Friday Night | 47°F | Slight Chance Rain Showers then Partly Cloudy | 6 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov) for South Bethlehem (40.999, -79.340). Updated through the day.
Growing snapshot for South Bethlehem
Last spring frost
May 10
First fall frost
Oct 12
Growing season
155 days
Hardiness zone
6a
More local growing data for South Bethlehem: nearby ZIP 16223 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Apollo
Applewold
Atwood
Clinton
Dayton
Distant
East Brady
Elderton
Ford City
Ford Cliff
Freeport
Kittanning
Lenape Heights
Manorville
New Bethlehem
North Apollo
North Vandergrift
Orchard Hills
Rural Valley
Sagamore
Schenley
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Templeton
West Hills
West Kittanning
Worthington
Yatesboro
Climate data from the nearest NOAA station, Putneyville 2 Se Dam, Pa (5.7 mi from South Bethlehem). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.