Oswego, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oswego, a city in Oswego County, New York.
Tonight
49°F
Mostly Cloudy
Mostly cloudy, with a low around 49. Northeast wind around 8 mph.
7-day forecast for Oswego
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Cloudy | 8 mph NE | 0% |
| Saturday | 66°F | Mostly Sunny | 6 mph NE | 0% |
| Saturday Night | 52°F | Mostly Cloudy then Chance Rain Showers | 3 to 7 mph E | 32% |
| Sunday | 65°F | Rain Showers | 7 to 13 mph E | 80% |
| Sunday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 8 to 13 mph NE | 30% |
| Monday | 63°F | Mostly Sunny | 15 mph NE | 0% |
| Monday Night | 49°F | Mostly Cloudy | 7 to 15 mph NE | 5% |
| Tuesday | 63°F | Mostly Cloudy | 7 to 12 mph E | 11% |
| Tuesday Night | 48°F | Mostly Cloudy | 7 to 12 mph E | 11% |
| Wednesday | 62°F | Slight Chance Rain Showers | 10 mph E | 19% |
| Wednesday Night | 49°F | Chance Rain Showers | 7 to 10 mph E | 29% |
| Thursday | 64°F | Chance Rain Showers | 10 mph E | 32% |
| Thursday Night | 51°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 32% |
| Friday | 67°F | Slight Chance Rain Showers then Mostly Sunny | 6 to 10 mph N | 22% |
Forecast source: National Weather Service (api.weather.gov) for Oswego (43.458, -76.504). Updated through the day.
Growing snapshot for Oswego
Last spring frost
Apr 22
First fall frost
Oct 29
Growing season
187 days
Hardiness zone
6a
More local growing data for Oswego: nearby ZIP 13126 weather · frost dates · planting calendar · New York frost dates
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SUNY Oswego
Climate data from the nearest NOAA station, Oswego, Ny (4.1 mi from Oswego). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.