Roslyn, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roslyn, a community in Montgomery County, Pennsylvania.
This Afternoon
70°F
Mostly Sunny
Mostly sunny, with a high near 70. Southwest wind around 5 mph.
7-day forecast for Roslyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Mostly Sunny | 5 mph SW | 2% |
| Tonight | 49°F | Partly Cloudy then Patchy Fog | 0 to 5 mph S | 3% |
| Wednesday | 73°F | Patchy Fog then Mostly Sunny | 0 to 5 mph S | 2% |
| Wednesday Night | 57°F | Mostly Cloudy | 5 mph S | 1% |
| Thursday | 72°F | Chance Light Rain | 5 to 10 mph S | 38% |
| Thursday Night | 61°F | Chance Light Rain then Chance T-storms | 0 to 5 mph SW | 72% |
| Friday | 70°F | Light Rain | 0 to 5 mph SW | 77% |
| Friday Night | 52°F | Light Rain | 0 to 5 mph NW | 77% |
| Saturday | 66°F | Chance Light Rain | 5 mph NW | 30% |
| Saturday Night | 43°F | Slight Chance Light Rain then Partly Cloudy | 5 mph NW | 15% |
| Sunday | 61°F | Mostly Sunny | 5 mph NW | 12% |
| Sunday Night | 41°F | Partly Cloudy then Slight Chance Light Rain | 0 to 5 mph W | 23% |
| Monday | 58°F | Chance Light Rain | 5 to 10 mph NW | 33% |
| Monday Night | 40°F | Chance Light Rain | 5 to 10 mph W | 33% |
Forecast source: National Weather Service (api.weather.gov) for Roslyn (40.131, -75.137). Updated through the day.
Growing snapshot for Roslyn
Last spring frost
Apr 11
First fall frost
Nov 1
Growing season
205 days
Hardiness zone
7b
More local growing data for Roslyn: nearby ZIP 19001 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Willow Grove Nas, Pa (5.2 mi from Roslyn). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.