St. Lawrence, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Lawrence, a borough in Berks County, Pennsylvania.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. South wind 0 to 10 mph.
7-day forecast for St. Lawrence
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 0 to 10 mph S | 2% |
| Tonight | 59°F | Mostly Cloudy | 5 to 10 mph SE | 10% |
| Thursday | 72°F | Light Rain | 5 to 10 mph S | 78% |
| Thursday Night | 59°F | Light Rain | 0 to 5 mph SW | 81% |
| Friday | 70°F | Light Rain Likely | 0 mph | 72% |
| Friday Night | 48°F | Chance Light Rain then Partly Cloudy | 0 to 5 mph NW | 35% |
| Saturday | 63°F | Mostly Sunny | 5 to 10 mph W | 14% |
| Saturday Night | 42°F | Partly Cloudy | 10 mph W | 14% |
| Sunday | 60°F | Mostly Sunny | 5 to 10 mph NW | 4% |
| Sunday Night | 39°F | Mostly Clear | 5 to 10 mph W | 4% |
| Monday | 59°F | Sunny | 10 to 15 mph W | 9% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph W | 9% |
| Tuesday | 63°F | Sunny | 5 to 15 mph W | 4% |
| Tuesday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for St. Lawrence (40.326, -75.864). Updated through the day.
Growing snapshot for St. Lawrence
Last spring frost
Apr 14
First fall frost
Oct 29
Growing season
197 days
Hardiness zone
7a
More local growing data for St. Lawrence: nearby ZIP 19606 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Reading Spaatz Fld, Pa (6.1 mi from St. Lawrence). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.