Mellen, WI Weather & Growing Conditions
This Afternoon
62°F
Cloudy
Cloudy, with a high near 62. Northeast wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Cloudy | 5 mph NE | 10% |
| Tonight | 48°F | Mostly Cloudy | 0 to 5 mph N | 11% |
| Sunday | 61°F | Mostly Cloudy | 5 to 10 mph NE | 14% |
| Sunday Night | 37°F | Mostly Cloudy | 0 to 10 mph NE | 5% |
| Monday | 61°F | Mostly Cloudy | 0 to 5 mph NE | 0% |
| Monday Night | 31°F | Partly Cloudy then Widespread Frost | 0 to 5 mph E | 0% |
| Tuesday | 65°F | Widespread Frost then Sunny | 0 to 5 mph E | 0% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 5 mph E | 0% |
| Wednesday | 69°F | Sunny | 0 to 5 mph SE | 0% |
| Wednesday Night | 38°F | Mostly Clear | 0 to 5 mph E | 1% |
| Thursday | 70°F | Mostly Sunny | 0 to 5 mph SE | 3% |
| Thursday Night | 41°F | Partly Cloudy | 0 to 5 mph SE | 3% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph S | 3% |
| Friday Night | 44°F | Partly Cloudy | 0 to 5 mph SE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mellen, WI
Last spring frost
May 26
First fall frost
Sep 27
Growing season
125 days
Hardiness zone
4a
Explore more for Mellen, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Mellen 4 Ne, Wi (7.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.