Colby, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Colby, a city in Marathon County, Wisconsin.
Overnight
63°F
Partly Cloudy
Partly cloudy. Low around 63, with temperatures rising to around 65 overnight. South southwest wind around 9 mph, with gusts as high as 18 mph.
7-day forecast for Colby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Partly Cloudy | 9 mph SSW | 1% |
| Tuesday | 77°F | Slight Chance Showers And Thunderstorms | 7 to 12 mph WSW | 47% |
| Tuesday Night | 55°F | Mostly Cloudy | 3 to 7 mph NW | 14% |
| Wednesday | 76°F | Mostly Sunny | 2 to 6 mph N | 1% |
| Wednesday Night | 52°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Thursday | 81°F | Sunny | 0 to 7 mph SSW | 0% |
| Thursday Night | 58°F | Mostly Clear | 6 mph SSW | 0% |
| Friday | 84°F | Sunny | 5 to 12 mph SW | 7% |
| Friday Night | 61°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph SW | 22% |
| Saturday | 83°F | Slight Chance Rain Showers | 5 to 8 mph SW | 17% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 3 to 7 mph WSW | 48% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 43% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 2 to 7 mph N | 36% |
| Monday | 81°F | Chance Rain Showers | 6 mph SW | 31% |
Forecast source: National Weather Service (api.weather.gov) for Colby (44.911, -90.316). Updated through the day.
Growing snapshot for Colby
Last spring frost
May 13
First fall frost
Sep 26
Growing season
136 days
Hardiness zone
4b
More local growing data for Colby: nearby ZIP 54421 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Abbotsford
Athens
Edgar
Eland
Elderon
Fenwood
Hatley
Knowlton
Kronenwetter
Maine
Marathon City
Mosinee
Rib Mountain
Rothschild
Schofield
Stratford
Wausau
Weston
Climate data from the nearest NOAA station, Owen 1E, Wi (13.3 mi from Colby). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.