Clam Lake, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Clam Lake, a community in Ashland County, Wisconsin.
Overnight
63°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy. Low around 63, with temperatures rising to around 66 overnight. Southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Clam Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Showers And Thunderstorms Likely | 10 mph SW | 64% |
| Tuesday | 75°F | Showers And Thunderstorms Likely then Partly Sunny | 5 mph W | 57% |
| Tuesday Night | 49°F | Partly Cloudy | 0 to 5 mph NW | 2% |
| Wednesday | 76°F | Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 53°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Thursday | 81°F | Sunny | 5 to 10 mph SW | 2% |
| Thursday Night | 60°F | Mostly Clear | 5 to 10 mph SW | 5% |
| Friday | 84°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 17% |
| Friday Night | 58°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 24% |
| Saturday | 81°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 22% |
| Saturday Night | 58°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph W | 50% |
| Sunday | 77°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 43% |
| Sunday Night | 56°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 24% |
| Monday | 78°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 22% |
Forecast source: National Weather Service (api.weather.gov) for Clam Lake (46.154, -90.906). Updated through the day.
Growing snapshot for Clam Lake
Last spring frost
May 16
First fall frost
Sep 30
Growing season
136 days
Hardiness zone
4a
More local growing data for Clam Lake: nearby ZIP 54517 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Ashland
Bayfront
Butternut
Diaperville
Franks Field
Glidden
Jolmaville
Marengo
Mellen
New Odanah
Odanah
Park Falls
Climate data from the nearest NOAA station, Clam Lake 4W, Wi (4 mi from Clam Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.