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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.

Today
73°F
Mostly Sunny
Mostly sunny, with a high near 73. East wind around 5 mph.

7-day forecast for Emmaus

WhenTempForecastWindPrecip
Today 73°F Mostly Sunny 5 mph E 1%
Tonight 57°F Mostly Cloudy then Chance Rain Showers 5 mph SE 25%
Sunday 71°F Rain Showers 5 to 10 mph S 90%
Sunday Night 55°F Showers And Thunderstorms 5 to 10 mph NW 95%
Monday 69°F Partly Sunny then Slight Chance Rain Showers 10 mph NE 16%
Monday Night 48°F Chance Rain Showers 5 to 10 mph NE 32%
Tuesday 62°F Chance Rain Showers 10 mph NE 35%
Tuesday Night 48°F Chance Rain Showers 10 to 15 mph NE 32%
Wednesday 62°F Chance Rain Showers 15 mph NE 26%
Wednesday Night 48°F Chance Rain Showers 15 mph NE 32%
Thursday 62°F Chance Rain Showers 10 to 15 mph NE 32%
Thursday Night 48°F Chance Rain Showers 10 to 15 mph NE 32%
Friday 66°F Slight Chance Rain Showers 10 to 15 mph N 23%
Friday Night 48°F Slight Chance Rain Showers 10 mph N 23%

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.