Morning Sun, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Morning Sun, a city in Louisa County, Iowa.
Today
87°F
Mostly Sunny
Mostly sunny, with a high near 87. Southwest wind 5 to 10 mph.
7-day forecast for Morning Sun
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 5 mph NE | 53% |
| Wednesday | 79°F | Showers And Thunderstorms Likely | 5 mph NE | 81% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 5 mph NE | 76% |
| Thursday | 81°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph NE | 60% |
| Thursday Night | 63°F | Mostly Clear | 0 to 5 mph E | 7% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 66°F | Mostly Clear | 0 to 5 mph SE | 14% |
| Saturday | 86°F | Sunny | 5 mph S | 12% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph S | 10% |
| Sunday | 88°F | Sunny | 10 mph SW | 10% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph S | 24% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms | 10 mph S | 24% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph S | 28% |
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 Aug 4, 2026.