Morning Sun, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Morning Sun, a city in Louisa County, Iowa.
This Afternoon
85°F
Slight Chance Showers And Thunderstorms
A slight chance of rain showers before 4pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 85. South wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Morning Sun
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Slight Chance Showers And Thunderstorms | 10 mph S | 24% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph NW | 77% |
| Sunday | 72°F | Showers And Thunderstorms | 10 to 15 mph NE | 78% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 15 mph NE | 63% |
| Monday | 64°F | Showers And Thunderstorms Likely | 15 mph NE | 63% |
| Monday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 51% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Tuesday Night | 49°F | Mostly Clear | 5 to 10 mph NE | 4% |
| Wednesday | 67°F | Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 69°F | Mostly Sunny | 5 mph NE | 6% |
| Thursday Night | 55°F | Partly Cloudy | 5 mph NE | 5% |
| Friday | 72°F | Mostly Sunny | 5 mph E | 5% |
| Friday Night | 56°F | Partly Cloudy | 5 mph E | 7% |
Forecast source: National Weather Service (api.weather.gov) for Morning Sun (41.094, -91.251). Updated through the day.
Growing snapshot for Morning Sun
Last spring frost
Apr 26
First fall frost
Oct 10
Growing season
167 days
Hardiness zone
5b
More local growing data for Morning Sun: nearby ZIP 52640 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Columbus Junction, Ia (12.8 mi from Morning Sun). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.