Merton, WI Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Merton, a village in Waukesha County, Wisconsin.

Today

63°F

Isolated Rain Showers

Isolated rain showers. Cloudy. High near 63, with temperatures falling to around 54 in the afternoon. Southwest wind 10 to 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Merton

When	Temp	Forecast	Wind	Precip
Today	63°F	Isolated Rain Showers	10 to 15 mph SW	17%
Tonight	45°F	Chance Rain Showers	10 to 15 mph SW	39%
Thursday	54°F	Rain Showers Likely then Chance Light Rain	10 to 15 mph W	59%
Thursday Night	38°F	Chance Light Rain then Mostly Cloudy	10 mph N	31%
Friday	47°F	Mostly Cloudy	10 to 15 mph N	9%
Friday Night	31°F	Partly Cloudy	0 to 5 mph N	1%
Saturday	49°F	Sunny	0 to 5 mph NW	0%
Saturday Night	33°F	Mostly Clear	0 to 5 mph W	3%
Sunday	54°F	Sunny	5 to 10 mph W	7%
Sunday Night	35°F	Mostly Clear	0 to 5 mph W	1%
Monday	59°F	Mostly Sunny	0 to 10 mph SW	0%
Monday Night	39°F	Mostly Clear	5 to 10 mph W	1%
Tuesday	59°F	Sunny	5 to 10 mph NW	2%
Tuesday Night	38°F	Partly Cloudy	0 to 5 mph NW	1%

Forecast source: National Weather Service (api.weather.gov) for Merton (43.144, -88.312). Updated through the day.

Growing snapshot for Merton

Last spring frost

Apr 30

First fall frost

Oct 16

Growing season

167 days

Hardiness zone

More local growing data for Merton: nearby ZIP 53029 weather · frost dates · planting calendar · Wisconsin frost dates

Nearby towns & communities

Big Bend Brookfield Butler Chenequa Delafield Dousman Eagle Elm Grove Hartland Lac La Belle Lannon Menomonee Falls Mukwonago Muskego Nashotah New Berlin North Lake North Prairie Oconomowoc Oconomowoc Lake Okauchee Lake Pewaukee Pewaukee Potter Lake Summit Sussex Vernon Wales Waukesha Waukesha

All Wisconsin locations ›

Climate data from the nearest NOAA station, Richfield 3 Ssw, Wi (8 mi from Merton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.