Sparta, WI Weather & Growing Conditions
Today
80°F
Isolated Showers And Thunderstorms then Scattered Showers And Thunderstorms
Isolated showers and thunderstorms before 8am, then scattered showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 77 in the afternoon. West wind 5 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Isolated Showers And Thunderstorms then Scattered Showers And Thunderstorms | 5 to 8 mph W | 51% |
| Tonight | 57°F | Scattered Showers And Thunderstorms | 0 to 3 mph W | 40% |
| Wednesday | 79°F | Partly Sunny | 0 to 5 mph NW | 2% |
| Wednesday Night | 52°F | Mostly Clear | 0 to 3 mph SW | 0% |
| Thursday | 84°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 58°F | Mostly Clear | 3 mph S | 0% |
| Friday | 87°F | Sunny | 1 to 10 mph SW | 5% |
| Friday Night | 62°F | Slight Chance Showers And Thunderstorms | 2 to 9 mph SW | 16% |
| Saturday | 87°F | Mostly Sunny | 2 to 8 mph SW | 10% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 38% |
| Sunday | 87°F | Chance Rain Showers | 3 to 8 mph W | 38% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 0 to 6 mph S | 40% |
| Monday | 85°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 1 to 5 mph S | 38% |
| Monday Night | 63°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph NE | 29% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sparta, WI
Last spring frost
May 9
First fall frost
Oct 1
Growing season
144 days
Hardiness zone
4b
Explore more for Sparta, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Sparta, Wi (3.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.