Oshkosh, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oshkosh, a city in Winnebago County, Wisconsin.
Today
84°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of rain showers between 2pm and 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 84, with temperatures falling to around 81 in the afternoon. Heat index values as high as 88. Southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Oshkosh
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 8 to 13 mph SW | 34% |
| Tonight | 63°F | Chance Showers And Thunderstorms | 3 to 9 mph W | 60% |
| Wednesday | 78°F | Chance Rain Showers | 5 mph WSW | 24% |
| Wednesday Night | 59°F | Chance Rain Showers | 5 mph SSW | 17% |
| Thursday | 81°F | Sunny | 5 mph SSW | 4% |
| Thursday Night | 61°F | Mostly Clear | 5 mph SSW | 2% |
| Friday | 84°F | Sunny | 5 to 12 mph SW | 1% |
| Friday Night | 65°F | Mostly Clear | 7 to 10 mph SSW | 11% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 7 to 12 mph SW | 15% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 to 10 mph SSW | 36% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 7 to 10 mph WSW | 36% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 6 to 10 mph WSW | 48% |
| Monday | 83°F | Chance Rain Showers | 5 to 8 mph SSW | 34% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 7 mph NNE | 41% |
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 Aug 4, 2026.