Larchwood, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Larchwood, a city in Lyon County, Iowa.
Tonight
56°F
Cloudy
Cloudy, with a low around 56. North northeast wind around 10 mph.
7-day forecast for Larchwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Cloudy | 10 mph NNE | 10% |
| Sunday | 66°F | Mostly Cloudy | 10 to 15 mph NE | 9% |
| Sunday Night | 52°F | Rain Showers | 10 mph ENE | 94% |
| Monday | 58°F | Rain Showers | 10 mph ENE | 94% |
| Monday Night | 46°F | Mostly Cloudy | 5 to 10 mph ENE | 14% |
| Tuesday | 63°F | Partly Sunny | 5 to 10 mph E | 2% |
| Tuesday Night | 45°F | Mostly Clear | 5 mph ESE | 1% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph SE | 6% |
| Wednesday Night | 51°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph SE | 50% |
| Thursday | 68°F | Chance Showers And Thunderstorms | 10 mph SSE | 50% |
| Thursday Night | 55°F | Mostly Cloudy | 5 to 10 mph SE | 11% |
| Friday | 72°F | Mostly Cloudy | 5 to 10 mph SE | 10% |
| Friday Night | 58°F | Mostly Cloudy then Chance Rain Showers | 5 to 10 mph SE | 30% |
| Saturday | 71°F | Chance Rain Showers | 10 to 15 mph SSE | 40% |
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 20, 2026.