Platteville, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Platteville, a city in Grant County, Wisconsin.
Tonight
53°F
Chance Rain Showers
A chance of rain showers before 2am. Mostly cloudy. Low around 53, with temperatures rising to around 57 overnight. South wind around 12 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Platteville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Chance Rain Showers | 12 mph S | 46% |
| Wednesday | 56°F | Chance Rain Showers | 12 to 15 mph SW | 46% |
| Wednesday Night | 46°F | Chance Rain Showers | 14 mph SW | 42% |
| Thursday | 52°F | Rain Showers Likely | 8 to 12 mph W | 74% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 20% |
| Friday | 48°F | Partly Sunny | 3 to 10 mph N | 8% |
| Friday Night | 33°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 1 to 5 mph W | 1% |
| Saturday Night | 36°F | Partly Cloudy | 5 mph W | 3% |
| Sunday | 57°F | Mostly Sunny | 5 to 8 mph W | 13% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SW | 4% |
| Monday | 59°F | Mostly Sunny | 3 to 10 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 59°F | Sunny | 7 mph W | 1% |
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
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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 Nov 4, 2026.