Sparta, WI Weather & Growing Conditions
Today
61°F
Chance Rain Showers then Mostly Cloudy
A chance of rain showers before noon. Mostly cloudy. High near 61, with temperatures falling to around 54 in the afternoon. South wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 61°F | Chance Rain Showers then Mostly Cloudy | 13 mph S | 36% |
| Tonight | 43°F | Rain Showers Likely | 7 to 10 mph W | 68% |
| Thursday | 54°F | Chance Rain Showers | 8 to 14 mph N | 49% |
| Thursday Night | 33°F | Mostly Cloudy | 3 to 9 mph N | 11% |
| Friday | 49°F | Mostly Sunny | 2 to 6 mph N | 0% |
| Friday Night | 26°F | Mostly Clear | 1 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 3 mph W | 0% |
| Saturday Night | 31°F | Mostly Clear | 1 mph W | 3% |
| Sunday | 56°F | Sunny | 1 to 7 mph W | 5% |
| Sunday Night | 32°F | Mostly Clear | 2 mph SW | 0% |
| Monday | 62°F | Mostly Sunny | 1 to 9 mph SW | 0% |
| Monday Night | 36°F | Partly Cloudy | 1 to 5 mph W | 0% |
| Tuesday | 60°F | Sunny | 1 to 5 mph NW | 0% |
| Tuesday Night | 34°F | Partly Cloudy | 1 mph NW | 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 Nov 4, 2026.