Sparta, WI Weather & Growing Conditions
Overnight
55°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 55, with temperatures rising to around 57 overnight. South wind around 5 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 |
|---|---|---|---|---|
| Overnight | 55°F | Chance Rain Showers | 5 mph S | 32% |
| Wednesday | 61°F | Rain Showers | 5 to 12 mph S | 76% |
| Wednesday Night | 43°F | Rain Showers | 5 to 9 mph SW | 82% |
| Thursday | 54°F | Rain Showers | 5 to 13 mph NW | 79% |
| 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% |
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.