Colby, WI Weather & Growing Conditions
Overnight
62°F
Mostly Cloudy
Mostly cloudy, with a low around 62. South southwest wind around 9 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Cloudy | 9 mph SSW | 1% |
| Tuesday | 77°F | Chance Rain Showers | 7 to 12 mph WSW | 30% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 7 mph NW | 11% |
| Wednesday | 75°F | Mostly Sunny | 5 mph N | 1% |
| Wednesday Night | 52°F | Mostly Clear | 0 to 3 mph W | 0% |
| Thursday | 81°F | Patchy Fog then Sunny | 0 to 7 mph SW | 0% |
| Thursday Night | 58°F | Mostly Clear | 6 mph SW | 0% |
| Friday | 84°F | Sunny | 5 to 12 mph SW | 5% |
| Friday Night | 61°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 22% |
| Saturday | 83°F | Slight Chance Rain Showers | 5 to 9 mph SW | 16% |
| 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 | 3 to 7 mph SW | 31% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Colby, WI
Last spring frost
May 13
First fall frost
Sep 26
Growing season
136 days
Hardiness zone
4b
Explore more for Colby, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Owen 1E, Wi (13.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.