Mellen, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mellen, a city in Ashland County, Wisconsin.
Tonight
48°F
Mostly Cloudy then Slight Chance Drizzle
A slight chance of drizzle after midnight. Mostly cloudy, with a low around 48. Southeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Mellen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Mostly Cloudy then Slight Chance Drizzle | 5 mph SE | 18% |
| Saturday | 65°F | Slight Chance Drizzle then Mostly Cloudy | 5 mph E | 15% |
| Saturday Night | 46°F | Mostly Cloudy | 0 to 5 mph NE | 4% |
| Sunday | 61°F | Partly Sunny | 5 to 10 mph NE | 0% |
| Sunday Night | 38°F | Mostly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 64°F | Partly Sunny | 5 to 10 mph NE | 0% |
| Monday Night | 35°F | Partly Cloudy | 0 to 5 mph E | 0% |
| Tuesday | 66°F | Sunny | 0 to 5 mph E | 1% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Wednesday | 68°F | Sunny | 0 to 5 mph SE | 1% |
| Wednesday Night | 41°F | Partly Cloudy | 0 to 5 mph SE | 2% |
| Thursday | 70°F | Mostly Sunny | 0 to 5 mph SW | 5% |
| Thursday Night | 44°F | Partly Cloudy | 0 to 5 mph SW | 5% |
| Friday | 73°F | Mostly Sunny | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Mellen (46.324, -90.660). Updated through the day.
Growing snapshot for Mellen
Last spring frost
May 26
First fall frost
Sep 27
Growing season
125 days
Hardiness zone
4b
More local growing data for Mellen: nearby ZIP 54846 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Ashland
Bayfront
Butternut
Clam Lake
Diaperville
Franks Field
Glidden
Jolmaville
Marengo
New Odanah
Odanah
Park Falls
Climate data from the nearest NOAA station, Mellen 4 Ne, Wi (3.8 mi from Mellen). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.