Plain, WI Weather & Growing Conditions
Tonight
54°F
Chance Light Rain
A chance of rain. Cloudy. Low around 54, with temperatures rising to around 59 overnight. South wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Chance Light Rain | 10 mph S | 38% |
| Wednesday | 58°F | Chance Light Rain | 10 to 15 mph SW | 29% |
| Wednesday Night | 45°F | Light Rain Likely | 15 mph SW | 62% |
| Thursday | 52°F | Light Rain Likely | 10 mph NW | 57% |
| Thursday Night | 36°F | Mostly Cloudy | 5 to 15 mph N | 6% |
| Friday | 48°F | Partly Sunny | 5 to 10 mph N | 0% |
| Friday Night | 29°F | Partly Cloudy | 0 mph | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 1% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 5 mph W | 6% |
| Sunday | 59°F | Slight Chance Light Rain | 5 to 10 mph W | 17% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph W | 4% |
| Monday | 60°F | Sunny | 0 to 10 mph SW | 1% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph W | 1% |
| Tuesday | 60°F | Sunny | 5 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Plain, WI
Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
161 days
Hardiness zone
5a
Explore more for Plain, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Lone Rock Tri Co Ap, Wi (9.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.