Herndon, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Herndon, a borough in Snyder County, Pennsylvania.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. Southeast wind around 2 mph.
7-day forecast for Herndon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 2 mph SE | 2% |
| Tonight | 59°F | Rain Showers | 1 to 9 mph SE | 81% |
| Sunday | 73°F | Rain Showers | 3 to 9 mph S | 93% |
| Sunday Night | 52°F | Showers And Thunderstorms | 3 to 8 mph NW | 90% |
| Monday | 68°F | Mostly Cloudy | 7 mph N | 13% |
| Monday Night | 48°F | Chance Rain Showers | 5 mph NE | 44% |
| Tuesday | 61°F | Chance Rain Showers | 5 mph E | 49% |
| Tuesday Night | 47°F | Chance Rain Showers | 3 to 7 mph E | 39% |
| Wednesday | 61°F | Chance Rain Showers | 7 mph E | 39% |
| Wednesday Night | 47°F | Chance Rain Showers | 7 mph NE | 34% |
| Thursday | 62°F | Chance Rain Showers | 6 mph NE | 36% |
| Thursday Night | 46°F | Chance Rain Showers | 5 mph NE | 36% |
| Friday | 67°F | Chance Rain Showers | 6 mph N | 28% |
| Friday Night | 47°F | Slight Chance Rain Showers | 6 mph N | 24% |
Forecast source: National Weather Service (api.weather.gov) for Herndon (40.712, -76.853). Updated through the day.
Growing snapshot for Herndon
Last spring frost
Apr 25
First fall frost
Oct 22
Growing season
178 days
Hardiness zone
6b
More local growing data for Herndon: nearby ZIP 17864 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Beaver Springs
Beavertown
Freeburg
Hummels Wharf
Kapp Heights
Kratzerville
Kreamer
Middleburg
Mount Pleasant Mills
Paxtonville
Penns Creek
Port Trevorton
Richfield
Selinsgrove
Shamokin Dam
Troxelville
Winfield
Climate data from the nearest NOAA station, Selinsgrove 2 S, Pa (5.9 mi from Herndon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.