St. Croix Falls, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Croix Falls, a city in Polk County, Wisconsin.
Today
76°F
Mostly Sunny
Mostly sunny, with a high near 76. West northwest wind around 10 mph.
7-day forecast for St. Croix Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Mostly Sunny | 10 mph WNW | 2% |
| Tonight | 54°F | Partly Cloudy | 0 to 5 mph SSW | 2% |
| Wednesday | 78°F | Sunny | 0 to 5 mph WSW | 0% |
| Wednesday Night | 57°F | Mostly Clear | 5 mph SW | 0% |
| Thursday | 83°F | Sunny | 5 to 15 mph SSW | 2% |
| Thursday Night | 62°F | Mostly Clear | 5 to 10 mph SSW | 3% |
| Friday | 86°F | Sunny | 5 to 10 mph SSW | 10% |
| Friday Night | 62°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 36% |
| Saturday | 84°F | Mostly Sunny | 0 to 5 mph SSW | 14% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 5 mph NNW | 52% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 5 mph SW | 52% |
| Sunday Night | 62°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 16% |
| Monday | 82°F | Slight Chance Showers And Thunderstorms | 5 mph NE | 22% |
| Monday Night | 61°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 22% |
Forecast source: National Weather Service (api.weather.gov) for St. Croix Falls (45.411, -92.625). Updated through the day.
Growing snapshot for St. Croix Falls
Last spring frost
May 4
First fall frost
Oct 8
Growing season
156 days
Hardiness zone
4b
More local growing data for St. Croix Falls: nearby ZIP 54009 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Amery
Balsam Lake
Centuria
Clear Lake
Dresser
Frederic
Luck
Milltown
Osceola
Star Prairie
Turtle Lake
Climate data from the nearest NOAA station, St Croix Falls, Wi (5.3 mi from St. Croix Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.