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 1am. Cloudy, with a low around 54. Northeast wind 7 to 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Casco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Rain Showers Likely | 7 to 10 mph NE | 73% |
| Sunday | 65°F | Partly Sunny | 10 to 17 mph NNE | 2% |
| Sunday Night | 48°F | Mostly Cloudy | 9 to 15 mph NE | 4% |
| Monday | 60°F | Mostly Cloudy | 10 to 14 mph ENE | 0% |
| Monday Night | 44°F | Mostly Cloudy | 8 to 13 mph ENE | 0% |
| Tuesday | 62°F | Partly Sunny | 8 to 14 mph ENE | 2% |
| Tuesday Night | 48°F | Partly Cloudy | 7 to 12 mph ENE | 3% |
| Wednesday | 63°F | Mostly Sunny | 7 to 13 mph ENE | 7% |
| Wednesday Night | 49°F | Partly Cloudy | 3 to 8 mph ENE | 4% |
| Thursday | 65°F | Mostly Sunny | 3 to 8 mph ENE | 3% |
| Thursday Night | 50°F | Mostly Cloudy | 5 mph NE | 3% |
| Friday | 69°F | Partly Sunny | 2 to 6 mph NE | 3% |
| Friday Night | 50°F | Partly Cloudy | 0 to 3 mph NE | 0% |
| Saturday | 70°F | Mostly Sunny | 0 to 6 mph ENE | 1% |
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 20, 2026.