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Larchwood, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Larchwood, a city in Lyon County, Iowa.

Today
66°F
Cloudy
Cloudy, with a high near 66. North wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Larchwood

WhenTempForecastWindPrecip
Today 66°F Cloudy 5 to 10 mph N 12%
Tonight 55°F Cloudy 10 mph NNE 5%
Sunday 66°F Cloudy 10 to 15 mph NE 13%
Sunday Night 52°F Chance Rain Showers 10 mph ENE 46%
Monday 61°F Chance Rain Showers 10 mph ENE 50%
Monday Night 46°F Slight Chance Rain Showers then Mostly Cloudy 5 to 10 mph E 22%
Tuesday 63°F Partly Sunny 5 to 10 mph ESE 5%
Tuesday Night 45°F Partly Cloudy 5 mph SE 2%
Wednesday 66°F Mostly Sunny 5 to 10 mph SE 7%
Wednesday Night 50°F Partly Cloudy then Chance Rain Showers 5 mph SSE 30%
Thursday 68°F Chance Rain Showers 5 to 10 mph SSE 30%
Thursday Night 53°F Mostly Cloudy then Slight Chance Rain Showers 5 mph SE 15%
Friday 71°F Slight Chance Rain Showers then Partly Sunny 5 to 10 mph SE 15%
Friday Night 54°F Mostly Cloudy then Slight Chance Rain Showers 5 to 10 mph SE 21%

Forecast source: National Weather Service (api.weather.gov) for Larchwood (43.455, -96.436). Updated through the day.

Growing snapshot for Larchwood

Last spring frost
May 2
First fall frost
Oct 2
Growing season
151 days
Hardiness zone
5a

More local growing data for Larchwood: nearby ZIP 51241 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Canton, Sd (11.6 mi from Larchwood). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.