Platteville, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Platteville, a city in Grant County, Wisconsin.
This Afternoon
70°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny, with a high near 70. Southeast wind around 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Platteville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Chance Showers And Thunderstorms | 13 mph SE | 30% |
| Tonight | 62°F | Chance Showers And Thunderstorms | 9 to 14 mph E | 87% |
| Saturday | 76°F | Showers And Thunderstorms | 6 to 9 mph S | 77% |
| Saturday Night | 59°F | Showers And Thunderstorms | 6 to 13 mph NE | 82% |
| Sunday | 67°F | Chance Rain Showers | 13 to 16 mph NE | 49% |
| Sunday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 15 mph NE | 27% |
| Monday | 63°F | Chance Rain Showers | 16 mph NE | 41% |
| Monday Night | 49°F | Chance Rain Showers | 9 to 15 mph NE | 41% |
| Tuesday | 61°F | Chance Rain Showers | 9 to 14 mph NE | 34% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 8 mph NE | 8% |
| Wednesday | 65°F | Mostly Sunny | 8 mph NE | 3% |
| Wednesday Night | 50°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 68°F | Mostly Sunny | 5 mph NE | 5% |
| Thursday Night | 52°F | Partly Cloudy | 2 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Platteville (42.728, -90.468). Updated through the day.
Growing snapshot for Platteville
Last spring frost
Apr 30
First fall frost
Oct 13
Growing season
166 days
Hardiness zone
5a
More local growing data for Platteville: nearby ZIP 53818 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Bagley
Bloomington
Boscobel
Cuba City
Dickeyville
Fennimore
Glen Haven
Kieler
Lancaster
Livingston
Montfort
Mount Hope
Muscoda
Patch Grove
Potosi
Sandy Hook
Tennyson
Woodman
Climate data from the nearest NOAA station, Platteville, Wi (1.4 mi from Platteville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.