Colby, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Colby, a city in Marathon County, Wisconsin.
This Afternoon
63°F
Showers And Thunderstorms Likely
Rain showers before 3pm, then showers and thunderstorms likely. Cloudy, with a high near 63. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Colby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Showers And Thunderstorms Likely | 14 mph S | 98% |
| Tonight | 55°F | Rain Showers | 12 mph SSE | 92% |
| Wednesday | 59°F | Rain Showers | 13 mph S | 85% |
| Wednesday Night | 44°F | Rain Showers | 12 mph WSW | 89% |
| Thursday | 47°F | Rain Showers Likely | 10 to 16 mph NNW | 71% |
| Thursday Night | 33°F | Mostly Cloudy | 13 to 16 mph N | 14% |
| Friday | 45°F | Partly Sunny | 7 to 14 mph NNE | 1% |
| Friday Night | 26°F | Partly Cloudy | 2 mph NNE | 1% |
| Saturday | 47°F | Mostly Sunny | 0 to 6 mph WSW | 2% |
| Saturday Night | 31°F | Partly Cloudy | 5 mph W | 8% |
| Sunday | 50°F | Mostly Sunny | 5 to 12 mph WNW | 5% |
| Sunday Night | 32°F | Partly Cloudy | 5 mph WSW | 2% |
| Monday | 54°F | Mostly Sunny | 3 to 10 mph SW | 2% |
| Monday Night | 36°F | Partly Cloudy | 7 mph W | 0% |
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 Nov 3, 2026.