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Emmaus, PA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Emmaus, a borough in Lehigh County, Pennsylvania.

This Afternoon
73°F
Partly Sunny
Partly sunny, with a high near 73. Southeast wind around 5 mph.

7-day forecast for Emmaus

WhenTempForecastWindPrecip
This Afternoon 73°F Partly Sunny 5 mph SE 1%
Tonight 58°F Mostly Cloudy then Rain Showers Likely 5 mph SE 65%
Sunday 74°F Rain Showers 5 to 10 mph S 96%
Sunday Night 56°F Showers And Thunderstorms then Mostly Cloudy 5 to 10 mph NW 86%
Monday 70°F Partly Sunny then Slight Chance Rain Showers 5 to 10 mph NE 22%
Monday Night 50°F Chance Rain Showers 5 to 10 mph NE 33%
Tuesday 64°F Chance Rain Showers 10 mph NE 40%
Tuesday Night 49°F Chance Rain Showers 10 to 15 mph NE 36%
Wednesday 63°F Slight Chance Rain Showers 15 mph NE 21%
Wednesday Night 49°F Slight Chance Rain Showers 10 to 15 mph NE 20%
Thursday 62°F Slight Chance Rain Showers 10 to 15 mph NE 24%
Thursday Night 48°F Chance Rain Showers 10 to 15 mph NE 31%
Friday 66°F Chance Rain Showers 10 to 15 mph N 30%
Friday Night 49°F Chance Rain Showers 10 to 15 mph N 30%

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

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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 Sep 19, 2026.