Portville, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portville, a village in Allegany County, New York.
Overnight
49°F
Mostly Clear
Mostly clear, with a low around 49. Southeast wind around 3 mph.
7-day forecast for Portville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 75°F | Partly Sunny | 3 to 9 mph SE | 0% |
| Wednesday Night | 57°F | Rain Showers | 10 mph S | 88% |
| Thursday | 70°F | Rain Showers | 7 to 10 mph SW | 83% |
| Thursday Night | 44°F | Partly Cloudy | 1 to 5 mph SW | 0% |
| Friday | 62°F | Mostly Cloudy then Chance Rain Showers | 1 to 5 mph SW | 28% |
| Friday Night | 38°F | Rain Showers Likely | 2 mph W | 56% |
| Saturday | 52°F | Rain Showers Likely | 3 to 8 mph W | 61% |
| Saturday Night | 31°F | Rain Showers Likely | 7 mph W | 61% |
| Sunday | 52°F | Slight Chance Rain Showers | 7 to 10 mph W | 16% |
| Sunday Night | 29°F | Slight Chance Rain Showers | 8 mph W | 20% |
| Monday | 52°F | Chance Rain Showers | 10 mph W | 28% |
| Monday Night | 29°F | Slight Chance Rain Showers then Partly Cloudy | 8 mph SW | 22% |
| Tuesday | 56°F | Mostly Sunny then Slight Chance Rain Showers | 8 to 12 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Portville (42.037, -78.337). Updated through the day.
Growing snapshot for Portville
Last spring frost
May 7
First fall frost
Oct 11
Growing season
156 days
Hardiness zone
5b
More local growing data for Portville: nearby ZIP 14770 weather · frost dates · planting calendar · New York frost dates
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Richburg
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Wellsville
Climate data from the nearest NOAA station, Olean, Ny (8.1 mi from Portville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.