Westby, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westby, a city in Vernon County, Wisconsin.
This Afternoon
65°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy. High near 65, with temperatures falling to around 62 in the afternoon. East wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Westby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Chance Showers And Thunderstorms | 6 mph E | 49% |
| Tonight | 55°F | Showers And Thunderstorms Likely | 9 mph NE | 59% |
| Sunday | 69°F | Partly Sunny | 9 to 14 mph NE | 13% |
| Sunday Night | 48°F | Mostly Cloudy | 10 mph NE | 2% |
| Monday | 63°F | Mostly Cloudy then Chance Rain Showers | 12 mph E | 29% |
| Monday Night | 45°F | Chance Rain Showers | 6 to 9 mph NE | 29% |
| Tuesday | 62°F | Partly Sunny | 6 to 9 mph E | 12% |
| Tuesday Night | 44°F | Partly Cloudy | 6 mph NE | 2% |
| Wednesday | 66°F | Mostly Sunny | 3 to 7 mph E | 2% |
| Wednesday Night | 47°F | Partly Cloudy | 1 to 5 mph E | 1% |
| Thursday | 68°F | Slight Chance Rain Showers | 3 mph E | 15% |
| Thursday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 2 mph E | 15% |
| Friday | 72°F | Partly Sunny | 2 mph E | 4% |
| Friday Night | 51°F | Partly Cloudy | 1 mph E | 4% |
Forecast source: National Weather Service (api.weather.gov) for Westby (43.653, -90.858). Updated through the day.
Growing snapshot for Westby
Last spring frost
Apr 27
First fall frost
Oct 14
Growing season
170 days
Hardiness zone
5a
More local growing data for Westby: nearby ZIP 54667 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cashton, Wi (6.9 mi from Westby). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.