Casco, WI Weather & Growing Conditions
Today
84°F
Mostly Sunny then Chance Showers And Thunderstorms
A slight 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 87. Southwest wind 9 to 14 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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 9 to 14 mph SW | 30% |
| Tonight | 63°F | Showers And Thunderstorms Likely | 5 to 8 mph WNW | 66% |
| Wednesday | 77°F | Partly Sunny | 5 mph NE | 14% |
| Wednesday Night | 58°F | Slight Chance Rain Showers | 2 to 6 mph SE | 6% |
| Thursday | 81°F | Sunny | 2 to 8 mph S | 3% |
| Thursday Night | 61°F | Mostly Clear | 8 mph SSW | 1% |
| Friday | 84°F | Sunny | 6 to 13 mph SW | 1% |
| Friday Night | 65°F | Mostly Clear | 12 mph SSW | 11% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 8 to 12 mph SW | 18% |
| Saturday Night | 66°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 | 10 mph WSW | 44% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 5 to 9 mph WSW | 45% |
| Monday | 81°F | Chance Showers And Thunderstorms | 7 mph SW | 31% |
| Monday Night | 63°F | Chance Showers And Thunderstorms | 7 mph NE | 39% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Casco, WI
Last spring frost
May 1
First fall frost
Oct 18
Growing season
168 days
Hardiness zone
5b
Explore more for Casco, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Kewaunee, Wi (12 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.