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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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.