Portville, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portville, a village in Allegany County, New York.
Today
70°F
Partly Sunny
Partly sunny, with a high near 70. Southeast wind around 5 mph.
7-day forecast for Portville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Partly Sunny | 5 mph SE | 1% |
| Tonight | 54°F | Rain Showers Likely | 6 mph SE | 68% |
| Sunday | 67°F | Showers And Thunderstorms | 3 to 7 mph W | 94% |
| Sunday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 3 to 7 mph N | 38% |
| Monday | 62°F | Mostly Cloudy | 8 mph NE | 2% |
| Monday Night | 41°F | Mostly Cloudy then Chance Rain Showers | 3 to 7 mph NE | 38% |
| Tuesday | 60°F | Chance Rain Showers | 5 to 8 mph E | 38% |
| Tuesday Night | 40°F | Chance Rain Showers | 9 mph E | 35% |
| Wednesday | 58°F | Chance Rain Showers | 9 mph E | 35% |
| Wednesday Night | 41°F | Chance Rain Showers | 8 mph SE | 44% |
| Thursday | 61°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 mph E | 44% |
| Thursday Night | 41°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph NE | 20% |
| Friday | 64°F | Slight Chance Rain Showers | 2 to 7 mph NE | 15% |
| Friday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 7 mph NE | 15% |
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
Nearby towns & communities
Alfred
Almond
Andover
Angelica
Belfast
Belmont
Bolivar
Cuba
Fillmore
Friendship
Houghton
Richburg
Rushford
Scio
Stannards
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 Sep 19, 2026.