Platteville, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Platteville, a city in Grant County, Wisconsin.
Today
82°F
Partly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 1pm and 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 82, with temperatures falling to around 78 in the afternoon. Southwest wind 7 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Platteville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 7 to 10 mph SW | 49% |
| Tonight | 64°F | Showers And Thunderstorms | 3 to 7 mph NW | 94% |
| Wednesday | 75°F | Chance Showers And Thunderstorms | 5 mph N | 44% |
| Wednesday Night | 57°F | Slight Chance Showers And Thunderstorms | 3 mph NW | 22% |
| Thursday | 79°F | Slight Chance Rain Showers then Sunny | 3 mph NE | 16% |
| Thursday Night | 60°F | Mostly Clear | 1 mph SE | 1% |
| Friday | 82°F | Sunny | 1 to 7 mph S | 4% |
| Friday Night | 64°F | Mostly Clear | 6 mph S | 7% |
| Saturday | 83°F | Mostly Sunny | 5 to 8 mph SW | 9% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 6 to 9 mph S | 29% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 8 to 13 mph SW | 29% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 9 mph S | 44% |
| Monday | 83°F | Chance Rain Showers | 6 to 9 mph S | 44% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 9 mph NE | 41% |
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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Sandy Hook
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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 Aug 4, 2026.