Superior, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Superior, a city in St. Louis County, Wisconsin.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. West wind 5 to 10 mph, with gusts as high as 20 mph. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Superior
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 5 to 10 mph W | 11% |
| Tonight | 48°F | Mostly Clear | 0 to 10 mph W | 0% |
| Wednesday | 78°F | Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 0 to 10 mph SW | 2% |
| Thursday | 84°F | Sunny | 10 to 15 mph SW | 6% |
| Thursday Night | 60°F | Partly Cloudy | 10 mph SW | 6% |
| Friday | 86°F | Sunny then Slight Chance Showers And Thunderstorms | 10 mph SW | 17% |
| Friday Night | 56°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 10 mph W | 28% |
| Saturday | 80°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 18% |
| Saturday Night | 56°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph NW | 38% |
| Sunday | 77°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 24% |
| Sunday Night | 55°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph NW | 18% |
| Monday | 76°F | Slight Chance Rain Showers | 0 to 5 mph N | 20% |
| Monday Night | 53°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 18% |
Forecast source: National Weather Service (api.weather.gov) for Superior (46.692, -92.080). Updated through the day.
Growing snapshot for Superior
Last spring frost
May 14
First fall frost
Oct 12
Growing season
149 days
Hardiness zone
5a
More local growing data for Superior: nearby ZIP 55802 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Duluth Harbor Stn, Mn (0.5 mi from Superior). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.