Lamoni, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lamoni, a city in Decatur County, Iowa.
This Afternoon
67°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 67, with temperatures falling to around 60 in the afternoon. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Lamoni
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms Likely | 10 mph SSW | 74% |
| Tonight | 46°F | Rain Showers Likely then Cloudy | 9 to 14 mph WNW | 64% |
| Wednesday | 52°F | Mostly Cloudy | 12 to 15 mph W | 10% |
| Wednesday Night | 42°F | Mostly Cloudy | 10 mph W | 3% |
| Thursday | 53°F | Mostly Cloudy then Chance Rain Showers | 8 to 12 mph WNW | 30% |
| Thursday Night | 41°F | Mostly Cloudy | 8 mph NNW | 8% |
| Friday | 52°F | Partly Sunny | 5 to 9 mph N | 3% |
| Friday Night | 35°F | Mostly Cloudy | 2 mph NNW | 1% |
| Saturday | 55°F | Partly Sunny | 5 mph WSW | 3% |
| Saturday Night | 38°F | Mostly Clear | 5 mph W | 5% |
| Sunday | 61°F | Sunny | 6 mph W | 2% |
| Sunday Night | 39°F | Mostly Clear | 6 mph SW | 0% |
| Monday | 65°F | Sunny | 6 to 10 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 6 mph WNW | 0% |
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 Nov 4, 2026.