Roslyn, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roslyn, a community in Montgomery County, Pennsylvania.
Tonight
58°F
Partly Cloudy
Partly cloudy, with a low around 58. Northeast wind 5 to 10 mph.
7-day forecast for Roslyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Saturday | 75°F | Mostly Sunny | 5 to 10 mph E | 1% |
| Saturday Night | 62°F | Patchy Fog | 5 to 10 mph E | 19% |
| Sunday | 75°F | Showers And Thunderstorms | 5 to 10 mph S | 82% |
| Sunday Night | 61°F | Showers And Thunderstorms | 5 to 10 mph W | 83% |
| Monday | 69°F | Chance Rain Showers | 10 mph NE | 44% |
| Monday Night | 57°F | Chance Rain Showers | 10 mph NE | 31% |
| Tuesday | 64°F | Chance Rain Showers | 15 mph NE | 35% |
| Tuesday Night | 53°F | Chance Rain Showers | 15 mph NE | 35% |
| Wednesday | 63°F | Chance Rain Showers | 15 mph NE | 34% |
| Wednesday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 38% |
| Thursday | 63°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 36% |
| Thursday Night | 53°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 33% |
| Friday | 68°F | Slight Chance Rain Showers | 10 mph N | 24% |
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 Sep 19, 2026.