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
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Northeast wind around 0 mph.
7-day forecast for St. Lawrence
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 66°F | Mostly Cloudy | 0 mph | 3% |
| Wednesday | 84°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 62% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 41% |
| Thursday | 89°F | Partly Sunny then Showers And Thunderstorms Likely | 0 to 10 mph S | 65% |
| Thursday Night | 72°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 65% |
| Friday | 89°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SW | 55% |
| Friday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 55% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 45% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 45% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 70°F | Partly Cloudy | 0 to 5 mph SW | 12% |
| Monday | 90°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 16% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 20% |
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 Aug 4, 2026.