Addison, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Addison, a borough in Somerset County, Pennsylvania.
Overnight
51°F
Mostly Clear
Mostly clear, with a low around 51. Southeast wind around 2 mph.
7-day forecast for Addison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Clear | 2 mph SE | 0% |
| Wednesday | 75°F | Partly Sunny | 1 to 7 mph SE | 1% |
| Wednesday Night | 59°F | Light Rain | 7 mph S | 95% |
| Thursday | 67°F | Light Rain Likely | 5 to 9 mph SW | 59% |
| Thursday Night | 50°F | Mostly Cloudy | 3 mph SW | 5% |
| Friday | 62°F | Partly Sunny then Slight Chance Light Rain | 2 to 6 mph W | 24% |
| Friday Night | 42°F | Chance Light Rain | 2 to 6 mph W | 47% |
| Saturday | 49°F | Chance Light Rain | 6 to 10 mph W | 47% |
| Saturday Night | 37°F | Chance Light Rain | 12 mph W | 38% |
| Sunday | 50°F | Slight Chance Light Rain | 12 mph W | 15% |
| Sunday Night | 34°F | Partly Cloudy | 12 mph W | 9% |
| Monday | 51°F | Mostly Sunny | 13 mph W | 14% |
| Monday Night | 36°F | Mostly Clear | 10 mph W | 14% |
| Tuesday | 56°F | Sunny | 10 to 14 mph W | 5% |
Forecast source: National Weather Service (api.weather.gov) for Addison (39.745, -79.334). Updated through the day.
Growing snapshot for Addison
Last spring frost
Apr 30
First fall frost
Oct 18
Growing season
171 days
Hardiness zone
6a
More local growing data for Addison: nearby ZIP 15411 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Confluence 1 Sw Dam, Pa (3.8 mi from Addison). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.