Sparta, WI Weather & Growing Conditions
Overnight
53°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 53. East wind around 13 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Showers And Thunderstorms | 13 mph E | 82% |
| Saturday | 62°F | Showers And Thunderstorms Likely | 6 to 12 mph E | 77% |
| Saturday Night | 51°F | Chance Showers And Thunderstorms then Cloudy | 7 to 10 mph NE | 46% |
| Sunday | 70°F | Partly Sunny | 10 to 14 mph NE | 2% |
| Sunday Night | 45°F | Mostly Cloudy | 6 to 12 mph NE | 3% |
| Monday | 65°F | Mostly Cloudy | 5 to 9 mph NE | 5% |
| Monday Night | 41°F | Mostly Cloudy | 2 to 7 mph E | 6% |
| Tuesday | 64°F | Mostly Sunny | 2 to 8 mph E | 6% |
| Tuesday Night | 40°F | Mostly Clear | 0 to 5 mph E | 2% |
| Wednesday | 68°F | Sunny | 1 to 6 mph E | 2% |
| Wednesday Night | 43°F | Mostly Clear | 2 mph E | 2% |
| Thursday | 69°F | Mostly Sunny | 0 to 3 mph NE | 5% |
| Thursday Night | 45°F | Partly Cloudy | 1 mph NE | 4% |
| Friday | 72°F | Mostly Sunny | 0 to 3 mph E | 2% |
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 Sep 19, 2026.