Casco, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casco, a village in Kewaunee County, Wisconsin.
Today
84°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of rain showers between 3pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny. High near 84, with temperatures falling to around 82 in the afternoon. Heat index values as high as 88. Southwest wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Casco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 8 to 14 mph SW | 30% |
| Tonight | 63°F | Chance Showers And Thunderstorms | 5 to 8 mph WNW | 69% |
| Wednesday | 77°F | Slight Chance Rain Showers then Partly Sunny | 5 mph NE | 15% |
| Wednesday Night | 58°F | Slight Chance Rain Showers | 5 mph SE | 7% |
| Thursday | 80°F | Sunny | 2 to 7 mph S | 3% |
| Thursday Night | 60°F | Mostly Clear | 7 mph SSW | 1% |
| Friday | 84°F | Sunny | 6 to 13 mph SW | 1% |
| Friday Night | 65°F | Mostly Clear | 8 to 12 mph SSW | 10% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 8 to 12 mph SW | 17% |
| Saturday Night | 65°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 to 10 mph SSW | 44% |
| Sunday | 84°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 10 mph WSW | 44% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 5 to 8 mph WSW | 45% |
| Monday | 81°F | Chance Showers And Thunderstorms | 7 mph SW | 32% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 7 mph NE | 39% |
Forecast source: National Weather Service (api.weather.gov) for Casco (44.555, -87.620). Updated through the day.
Growing snapshot for Casco
Last spring frost
May 1
First fall frost
Oct 18
Growing season
168 days
Hardiness zone
5b
More local growing data for Casco: nearby ZIP 54205 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Kewaunee, Wi (12 mi from Casco). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.