Superior, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Superior, a city in St. Louis County, Wisconsin.
Tonight
47°F
Rain
Rain. Cloudy. Low around 47, with temperatures rising to around 50 overnight. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Superior
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Rain | 10 to 15 mph NE | 87% |
| Wednesday | 52°F | Rain | 10 to 15 mph N | 89% |
| Wednesday Night | 38°F | Light Rain | 10 mph N | 86% |
| Thursday | 46°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 51% |
| Thursday Night | 26°F | Mostly Cloudy | 5 to 10 mph NE | 1% |
| Friday | 40°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Friday Night | 23°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 47°F | Mostly Sunny | 0 to 10 mph SW | 1% |
| Saturday Night | 30°F | Partly Cloudy | 5 mph W | 12% |
| Sunday | 50°F | Mostly Sunny | 5 to 10 mph W | 10% |
| Sunday Night | 30°F | Partly Cloudy | 5 mph SW | 3% |
| Monday | 52°F | Partly Sunny | 5 to 15 mph SW | 2% |
| Monday Night | 32°F | Partly Cloudy | 5 to 10 mph W | 0% |
| Tuesday | 48°F | Mostly Sunny | 5 to 10 mph W | 0% |
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 Nov 4, 2026.