Oshkosh, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oshkosh, a city in Winnebago County, Wisconsin.
Tonight
56°F
Rain Showers
Rain showers before 1am, then showers and thunderstorms. Cloudy, with a low around 56. East wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Oshkosh
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Rain Showers | 9 to 14 mph E | 98% |
| Saturday | 66°F | Showers And Thunderstorms | 12 to 15 mph E | 95% |
| Saturday Night | 54°F | Rain Showers | 13 mph NE | 75% |
| Sunday | 67°F | Chance Rain Showers then Partly Sunny | 15 mph NE | 28% |
| Sunday Night | 51°F | Mostly Cloudy | 12 to 16 mph NE | 2% |
| Monday | 62°F | Mostly Cloudy | 14 mph ENE | 5% |
| Monday Night | 49°F | Mostly Cloudy | 13 mph NE | 9% |
| Tuesday | 62°F | Partly Sunny | 10 to 14 mph ENE | 8% |
| Tuesday Night | 49°F | Partly Cloudy | 6 to 10 mph NE | 6% |
| Wednesday | 65°F | Mostly Sunny | 6 to 10 mph NE | 6% |
| Wednesday Night | 50°F | Partly Cloudy | 3 to 8 mph NE | 3% |
| Thursday | 69°F | Mostly Sunny | 6 mph NNE | 3% |
| Thursday Night | 52°F | Partly Cloudy | 1 to 5 mph NE | 5% |
| Friday | 71°F | Mostly Sunny | 6 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Oshkosh (44.023, -88.562). Updated through the day.
Growing snapshot for Oshkosh
Last spring frost
Apr 24
First fall frost
Oct 20
Growing season
178 days
Hardiness zone
5b
More local growing data for Oshkosh: nearby ZIP 54901 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Oshkosh, Wi (3.1 mi from Oshkosh). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.