Emmaus, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Emmaus, a borough in Lehigh County, Pennsylvania.
Tonight
48°F
Mostly Clear then Patchy Fog
Patchy fog between 3am and 4am. Mostly clear, with a low around 48. South wind 0 to 5 mph.
7-day forecast for Emmaus
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Mostly Clear then Patchy Fog | 0 to 5 mph S | 2% |
| Wednesday | 74°F | Patchy Fog then Sunny | 0 to 10 mph SW | 5% |
| Wednesday Night | 59°F | Mostly Cloudy | 5 mph S | 13% |
| Thursday | 72°F | Light Rain Likely | 5 to 10 mph S | 71% |
| Thursday Night | 60°F | Light Rain Likely | 0 to 5 mph SW | 65% |
| Friday | 69°F | Light Rain Likely | 0 to 5 mph W | 65% |
| Friday Night | 49°F | Light Rain Likely | 0 to 5 mph NW | 61% |
| Saturday | 65°F | Slight Chance Light Rain | 5 to 10 mph NW | 21% |
| Saturday Night | 39°F | Slight Chance Light Rain then Partly Cloudy | 5 mph NW | 16% |
| Sunday | 60°F | Mostly Sunny | 5 to 10 mph W | 12% |
| Sunday Night | 37°F | Slight Chance Light Rain | 5 mph W | 19% |
| Monday | 60°F | Chance Light Rain | 5 to 15 mph NW | 25% |
| Monday Night | 36°F | Slight Chance Light Rain | 5 to 10 mph W | 22% |
| Tuesday | 62°F | Slight Chance Light Rain then Mostly Sunny | 5 to 15 mph W | 16% |
Forecast source: National Weather Service (api.weather.gov) for Emmaus (40.535, -75.498). Updated through the day.
Growing snapshot for Emmaus
Last spring frost
Apr 20
First fall frost
Oct 24
Growing season
184 days
Hardiness zone
7a
More local growing data for Emmaus: nearby ZIP 18049 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
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DeSales University
Dorneyville
Egypt
Fountain Hill
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Laurys Station
Macungie
New Tripoli
North Catasauqua
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Climate data from the nearest NOAA station, Allentown Intl Ap, Pa (9.1 mi from Emmaus). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.