Orrtanna, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Orrtanna, a community in Adams County, Pennsylvania.
This Afternoon
71°F
Mostly Sunny
Mostly sunny, with a high near 71. South wind around 3 mph.
7-day forecast for Orrtanna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Mostly Sunny | 3 mph S | 1% |
| Tonight | 50°F | Mostly Clear | 3 mph SE | 1% |
| Wednesday | 73°F | Patchy Fog then Mostly Sunny | 2 to 9 mph S | 2% |
| Wednesday Night | 60°F | Mostly Cloudy then Rain Showers | 5 to 8 mph S | 83% |
| Thursday | 73°F | Rain Showers | 3 to 8 mph S | 79% |
| Thursday Night | 59°F | Chance Rain Showers | 0 to 3 mph W | 54% |
| Friday | 69°F | Chance Rain Showers | 2 mph NW | 54% |
| Friday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 0 to 3 mph NW | 47% |
| Saturday | 62°F | Mostly Sunny | 5 to 9 mph NW | 14% |
| Saturday Night | 39°F | Partly Cloudy | 3 to 8 mph NW | 13% |
| Sunday | 59°F | Mostly Sunny | 3 to 7 mph W | 7% |
| Sunday Night | 38°F | Partly Cloudy then Slight Chance Rain Showers | 7 mph W | 21% |
| Monday | 59°F | Slight Chance Rain Showers | 8 to 12 mph NW | 23% |
| Monday Night | 38°F | Slight Chance Rain Showers | 5 to 8 mph W | 23% |
Forecast source: National Weather Service (api.weather.gov) for Orrtanna (39.844, -77.361). Updated through the day.
Growing snapshot for Orrtanna
Last spring frost
Apr 28
First fall frost
Oct 17
Growing season
170 days
Hardiness zone
7a
More local growing data for Orrtanna: nearby ZIP 17343 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Abbottstown
Arendtsville
Aspers
Bendersville
Biglerville
Bonneauville
Carroll Valley
Cashtown
East Berlin
Fairfield
Gettysburg
Hampton
Heidlersburg
Hunterstown
Lake Heritage
Lake Meade
Littlestown
McKnightstown
McSherrystown
Midway
New Oxford
Table Rock
York Springs
Climate data from the nearest NOAA station, Cashtown 1S, Pa (1.4 mi from Orrtanna). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.