Herndon, PA Weather & Growing Conditions
Tonight
59°F
Rain Showers Likely
Rain showers likely after 11pm. Mostly cloudy, with a low around 59. Southeast wind 3 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Rain Showers Likely | 3 to 9 mph SE | 73% |
| Sunday | 74°F | Rain Showers | 3 to 10 mph S | 99% |
| Sunday Night | 52°F | Showers And Thunderstorms Likely then Mostly Cloudy | 3 to 7 mph NW | 62% |
| Monday | 68°F | Partly Sunny then Chance Rain Showers | 7 mph NE | 26% |
| Monday Night | 49°F | Rain Showers Likely | 5 mph NE | 55% |
| Tuesday | 62°F | Rain Showers Likely | 5 mph NE | 55% |
| Tuesday Night | 47°F | Chance Rain Showers | 6 mph E | 41% |
| Wednesday | 60°F | Chance Rain Showers | 7 mph E | 32% |
| Wednesday Night | 47°F | Chance Rain Showers | 5 mph E | 25% |
| Thursday | 61°F | Slight Chance Rain Showers then Mostly Cloudy | 6 mph NE | 24% |
| Thursday Night | 46°F | Slight Chance Rain Showers | 3 mph NE | 21% |
| Friday | 65°F | Slight Chance Rain Showers | 3 to 7 mph N | 24% |
| Friday Night | 47°F | Slight Chance Rain Showers | 3 to 7 mph N | 24% |
| Saturday | 68°F | Slight Chance Rain Showers | 7 mph N | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Herndon, PA
Last spring frost
Apr 25
First fall frost
Oct 22
Growing season
178 days
Hardiness zone
6b
Explore more for Herndon, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Selinsgrove 2 S, Pa (7.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.