Bryn Mawr, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bryn Mawr, a community in Delaware County, Pennsylvania.
Today
73°F
Patchy Fog then Sunny
Patchy fog between 7am and 8am. Sunny, with a high near 73. South wind 5 to 10 mph.
7-day forecast for Bryn Mawr
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Patchy Fog then Sunny | 5 to 10 mph S | 2% |
| Tonight | 58°F | Mostly Cloudy | 5 mph S | 1% |
| Thursday | 72°F | Chance Light Rain | 5 to 10 mph S | 54% |
| Thursday Night | 60°F | Light Rain | 5 mph SW | 82% |
| Friday | 68°F | Light Rain | 0 to 5 mph N | 82% |
| Friday Night | 51°F | Light Rain | 0 to 5 mph NW | 79% |
| Saturday | 63°F | Mostly Sunny | 5 to 10 mph NW | 6% |
| Saturday Night | 43°F | Partly Cloudy | 10 mph W | 7% |
| Sunday | 58°F | Mostly Sunny | 5 to 10 mph NW | 5% |
| Sunday Night | 41°F | Mostly Clear | 5 to 10 mph W | 7% |
| Monday | 57°F | Sunny | 10 mph W | 7% |
| Monday Night | 40°F | Mostly Clear | 5 to 10 mph W | 4% |
| Tuesday | 61°F | Sunny | 5 to 10 mph SW | 4% |
| Tuesday Night | 41°F | Mostly Clear | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Bryn Mawr (40.021, -75.316). Updated through the day.
Growing snapshot for Bryn Mawr
Last spring frost
Apr 8
First fall frost
Oct 31
Growing season
203 days
Hardiness zone
7b
More local growing data for Bryn Mawr: nearby ZIP 19010 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Aldan
Ardmore
Boothwyn
Brookhaven
Broomall
Chester
Chester Heights
Cheyney University
Clifton Heights
Collingdale
Colwyn
Darby
Dilworthtown
Drexel Hill
East Lansdowne
Eddystone
Folcroft
Folsom
Glenolden
Haverford College
Lansdowne
Lima
Linwood
Marcus Hook
Media
Morton
Norwood
Parkside
Prospect Park
Ridley Park
Climate data from the nearest NOAA station, Norristown, Pa (5.9 mi from Bryn Mawr). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.