Merton, WI Weather & Growing Conditions
Tonight
60°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 60. East wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Showers And Thunderstorms | 10 to 15 mph E | 97% |
| Saturday | 68°F | Showers And Thunderstorms | 5 to 10 mph SE | 99% |
| Saturday Night | 58°F | Showers And Thunderstorms | 5 to 10 mph E | 75% |
| Sunday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Sunday Night | 53°F | Mostly Cloudy | 10 to 15 mph NE | 5% |
| Monday | 61°F | Mostly Cloudy | 10 to 15 mph NE | 14% |
| Monday Night | 49°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph NE | 15% |
| Tuesday | 60°F | Slight Chance Rain Showers then Partly Sunny | 5 to 15 mph NE | 15% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 to 10 mph NE | 9% |
| Wednesday | 63°F | Partly Sunny | 5 to 10 mph NE | 9% |
| Wednesday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph NE | 3% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 68°F | Mostly Sunny | 0 to 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Merton, WI
Last spring frost
Apr 30
First fall frost
Oct 16
Growing season
167 days
Hardiness zone
5b
Explore more for Merton, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Richfield 3 Ssw, Wi (8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.