Morning Sun, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Morning Sun, a city in Louisa County, Iowa.
Overnight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. West wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Morning Sun
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Cloudy | 15 mph W | 6% |
| Wednesday | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph W | 20% |
| Wednesday Night | 46°F | Mostly Cloudy | 10 to 15 mph SW | 8% |
| Thursday | 55°F | Rain Showers Likely | 10 to 15 mph W | 62% |
| Thursday Night | 43°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NW | 16% |
| Friday | 50°F | Partly Sunny | 5 to 10 mph N | 5% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 57°F | Sunny | 5 mph W | 1% |
| Sunday Night | 37°F | Clear | 5 mph W | 0% |
| Monday | 64°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 42°F | Clear | 5 mph W | 0% |
| Tuesday | 64°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.