Harman US

Siren, WI Weather & Growing Conditions

Today
62°F
Patchy Fog
Patchy fog and a slight chance of rain showers. Cloudy, with a high near 62. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 62°F Patchy Fog 5 to 10 mph NE 15%
Tonight 47°F Patchy Fog 5 mph NE 6%
Sunday 65°F Mostly Cloudy 5 to 10 mph NE 0%
Sunday Night 41°F Mostly Cloudy 5 to 10 mph NE 0%
Monday 64°F Partly Sunny 5 mph E 0%
Monday Night 39°F Partly Cloudy 0 to 5 mph E 2%
Tuesday 66°F Sunny 0 to 5 mph E 2%
Tuesday Night 38°F Mostly Clear 0 to 5 mph SE 1%
Wednesday 68°F Sunny 0 to 5 mph SE 0%
Wednesday Night 42°F Mostly Clear 0 to 5 mph SE 3%
Thursday 70°F Mostly Sunny 0 to 5 mph SE 5%
Thursday Night 45°F Partly Cloudy 0 mph 3%
Friday 72°F Mostly Sunny 0 to 5 mph SE 4%
Friday Night 47°F Partly Cloudy 0 to 5 mph SE 7%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Siren, WI

Last spring frost
May 11
First fall frost
Oct 1
Growing season
141 days
Hardiness zone
4b

Explore more for Siren, WI: full frost dates · planting calendar · Wisconsin frost dates

Climate data from the nearest NOAA station, Grantsburg, Wi (14.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.