Tomah, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tomah, a city in Monroe County, Wisconsin.
Tonight
50°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Cloudy, with a low around 50. Northeast wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Tomah
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Chance Showers And Thunderstorms | 7 mph NE | 46% |
| Sunday | 69°F | Partly Sunny | 7 to 14 mph NE | 7% |
| Sunday Night | 43°F | Mostly Cloudy | 6 to 10 mph NE | 4% |
| Monday | 63°F | Mostly Cloudy | 6 to 10 mph E | 12% |
| Monday Night | 41°F | Mostly Cloudy | 2 to 8 mph E | 12% |
| Tuesday | 62°F | Partly Sunny | 3 to 9 mph E | 10% |
| Tuesday Night | 41°F | Partly Cloudy | 1 to 5 mph NE | 1% |
| Wednesday | 66°F | Mostly Sunny | 1 to 6 mph E | 1% |
| Wednesday Night | 43°F | Partly Cloudy | 0 to 3 mph NE | 1% |
| Thursday | 68°F | Mostly Sunny then Slight Chance Rain Showers | 2 mph E | 17% |
| Thursday Night | 47°F | Slight Chance Rain Showers then Mostly Cloudy | 1 mph NE | 17% |
| Friday | 72°F | Partly Sunny | 2 mph NE | 4% |
| Friday Night | 48°F | Partly Cloudy | 1 mph NE | 2% |
| Saturday | 72°F | Mostly Sunny | 0 to 5 mph E | 9% |
Forecast source: National Weather Service (api.weather.gov) for Tomah (43.988, -90.501). Updated through the day.
Growing snapshot for Tomah
Last spring frost
May 6
First fall frost
Oct 3
Growing season
148 days
Hardiness zone
4b
More local growing data for Tomah: nearby ZIP 54660 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mather 3 Nw, Wi (15.2 mi from Tomah). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.