Fairfield, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfield, a borough in Adams County, Pennsylvania.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. East wind around 3 mph.
7-day forecast for Fairfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 3 mph E | 0% |
| Tonight | 66°F | Mostly Cloudy | 0 to 3 mph SE | 12% |
| Wednesday | 83°F | Showers And Thunderstorms Likely | 0 to 3 mph E | 70% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 3 mph SE | 60% |
| Thursday | 88°F | Patchy Fog then Showers And Thunderstorms Likely | 1 to 6 mph S | 55% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 3 mph SW | 55% |
| Friday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 54% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 0 to 3 mph W | 54% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 42% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 2 mph NW | 42% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph NW | 13% |
| Sunday Night | 70°F | Partly Cloudy | 2 mph W | 13% |
| Monday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 7 mph W | 15% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 6 mph W | 15% |
Forecast source: National Weather Service (api.weather.gov) for Fairfield (39.789, -77.370). Updated through the day.
Growing snapshot for Fairfield
Last spring frost
Apr 28
First fall frost
Oct 17
Growing season
170 days
Hardiness zone
7a
More local growing data for Fairfield: nearby ZIP 17320 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Abbottstown
Arendtsville
Aspers
Bendersville
Biglerville
Bonneauville
Carroll Valley
Cashtown
East Berlin
Gettysburg
Hampton
Heidlersburg
Hunterstown
Lake Heritage
Lake Meade
Littlestown
McKnightstown
McSherrystown
Midway
New Oxford
Orrtanna
Table Rock
York Springs
Climate data from the nearest NOAA station, Cashtown 1S, Pa (7.9 mi from Fairfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.