Lamoni, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lamoni, a city in Decatur County, Iowa.
Today
84°F
Partly Sunny
Partly sunny. High near 84, with temperatures falling to around 82 in the afternoon. West wind 7 to 10 mph, with gusts as high as 22 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Lamoni
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Partly Sunny | 7 to 10 mph W | 12% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 8 mph N | 67% |
| Sunday | 68°F | Chance Rain Showers then Chance Showers And Thunderstorms | 8 to 12 mph NNE | 52% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 mph NE | 62% |
| Monday | 60°F | Showers And Thunderstorms Likely | 12 mph NE | 62% |
| Monday Night | 52°F | Chance Rain Showers | 10 mph NE | 39% |
| Tuesday | 59°F | Mostly Cloudy | 9 mph NE | 8% |
| Tuesday Night | 47°F | Partly Cloudy | 3 to 7 mph NE | 6% |
| Wednesday | 62°F | Mostly Sunny | 5 mph ENE | 2% |
| Wednesday Night | 51°F | Partly Cloudy | 3 mph E | 6% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph E | 15% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 3 mph E | 21% |
| Friday | 67°F | Slight Chance Rain Showers | 6 mph E | 21% |
| Friday Night | 57°F | Mostly Cloudy | 5 mph ESE | 13% |
Forecast source: National Weather Service (api.weather.gov) for Lamoni (40.620, -93.930). Updated through the day.
Growing snapshot for Lamoni
Last spring frost
Apr 16
First fall frost
Oct 20
Growing season
187 days
Hardiness zone
5b
More local growing data for Lamoni: nearby ZIP 50140 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lamoni, Ia (1.1 mi from Lamoni). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.