Casco, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casco, a village in Kewaunee County, Wisconsin.
Tonight
54°F
Rain Showers Likely
Rain showers likely before 4am, then showers and thunderstorms likely. Cloudy, with a low around 54. East wind 5 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Casco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Rain Showers Likely | 5 to 9 mph E | 72% |
| Saturday | 64°F | Showers And Thunderstorms | 10 to 14 mph ESE | 79% |
| Saturday Night | 52°F | Rain Showers Likely | 9 mph NE | 59% |
| Sunday | 67°F | Partly Sunny | 10 to 16 mph NE | 4% |
| Sunday Night | 49°F | Mostly Cloudy | 10 to 14 mph NE | 1% |
| Monday | 62°F | Mostly Cloudy | 12 to 15 mph ENE | 1% |
| Monday Night | 47°F | Mostly Cloudy | 9 to 13 mph ENE | 3% |
| Tuesday | 62°F | Partly Sunny | 9 to 14 mph ENE | 4% |
| Tuesday Night | 47°F | Partly Cloudy | 6 to 12 mph ENE | 7% |
| Wednesday | 64°F | Mostly Sunny | 6 to 10 mph ENE | 7% |
| Wednesday Night | 48°F | Partly Cloudy | 3 to 7 mph NE | 5% |
| Thursday | 68°F | Mostly Sunny | 3 to 7 mph NE | 4% |
| Thursday Night | 49°F | Partly Cloudy | 3 mph N | 4% |
| Friday | 69°F | Mostly Sunny | 6 mph N | 3% |
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 Sep 19, 2026.