Marengo, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marengo, a community in Ashland County, Wisconsin.
Tonight
51°F
Rain
Rain. Cloudy. Low around 51, with temperatures rising to around 53 overnight. Northeast wind 0 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Marengo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Rain | 0 to 5 mph NE | 80% |
| Wednesday | 56°F | Rain Likely | 0 to 5 mph NW | 72% |
| Wednesday Night | 40°F | Light Rain | 5 to 10 mph N | 91% |
| Thursday | 45°F | Light Rain | 10 to 15 mph N | 95% |
| Thursday Night | 30°F | Slight Chance Light Rain then Slight Chance Rain And Snow | 5 to 10 mph NE | 24% |
| Friday | 42°F | Partly Sunny | 0 to 5 mph NE | 9% |
| Friday Night | 25°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 49°F | Mostly Sunny | 0 to 5 mph SW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph SW | 12% |
| Sunday | 54°F | Mostly Sunny | 5 to 10 mph W | 14% |
| Sunday Night | 33°F | Partly Cloudy | 5 mph SW | 5% |
| Monday | 55°F | Partly Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 35°F | Partly Cloudy | 5 to 10 mph W | 2% |
| Tuesday | 52°F | Mostly Sunny | 5 to 10 mph W | 1% |
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 Nov 4, 2026.