Marengo, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marengo, a community in Ashland County, Wisconsin.
Today
62°F
Cloudy
Cloudy. High near 62, with temperatures falling to around 60 in the afternoon. Northeast wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Marengo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Cloudy | 5 mph NE | 14% |
| Tonight | 48°F | Mostly Cloudy then Patchy Fog | 0 to 5 mph N | 7% |
| Sunday | 61°F | Mostly Cloudy | 5 to 15 mph NE | 9% |
| Sunday Night | 38°F | Mostly Cloudy | 0 to 10 mph NE | 1% |
| Monday | 61°F | Partly Sunny | 0 to 10 mph NE | 1% |
| Monday Night | 37°F | Mostly Clear | 0 to 10 mph E | 0% |
| Tuesday | 68°F | Sunny | 0 to 10 mph E | 0% |
| Tuesday Night | 36°F | Mostly Clear | 0 to 5 mph E | 0% |
| Wednesday | 71°F | Sunny | 0 to 5 mph E | 0% |
| Wednesday Night | 40°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Thursday | 73°F | Mostly Sunny | 0 to 5 mph E | 3% |
| Thursday Night | 43°F | Partly Cloudy | 0 to 5 mph E | 3% |
| Friday | 75°F | Mostly Sunny | 0 to 5 mph SE | 2% |
| Friday Night | 46°F | Partly Cloudy | 0 to 5 mph SE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Marengo (46.422, -90.808). Updated through the day.
Growing snapshot for Marengo
Last spring frost
May 26
First fall frost
Sep 27
Growing season
125 days
Hardiness zone
4b
More local growing data for Marengo: nearby ZIP 54855 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Ashland
Bayfront
Butternut
Clam Lake
Diaperville
Franks Field
Glidden
Jolmaville
Mellen
New Odanah
Odanah
Park Falls
Climate data from the nearest NOAA station, Mellen 4 Ne, Wi (8.9 mi from Marengo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.