Marion, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marion, a city in Linn County, Iowa.
Today
80°F
Patchy Fog then Chance Showers And Thunderstorms
Patchy fog and occasional showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and 1pm, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 80. South wind 5 to 10 mph. Chance of precipitation is 90%.
7-day forecast for Marion
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Patchy Fog then Chance Showers And Thunderstorms | 5 to 10 mph S | 94% |
| Tonight | 62°F | Showers And Thunderstorms Likely | 5 to 10 mph NW | 71% |
| Sunday | 68°F | Chance Rain Showers | 10 to 15 mph NE | 53% |
| Sunday Night | 56°F | Chance Rain Showers | 10 to 15 mph NE | 48% |
| Monday | 63°F | Chance Rain Showers | 15 mph NE | 51% |
| Monday Night | 50°F | Chance Rain Showers | 10 mph NE | 42% |
| Tuesday | 62°F | Chance Rain Showers then Partly Sunny | 10 mph NE | 32% |
| Tuesday Night | 47°F | Mostly Clear | 5 to 10 mph NE | 6% |
| Wednesday | 66°F | Sunny | 5 mph NE | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 5 mph NE | 1% |
| Thursday | 67°F | Mostly Sunny | 5 mph NE | 7% |
| Thursday Night | 53°F | Partly Cloudy | 0 to 5 mph E | 5% |
| Friday | 70°F | Mostly Sunny | 5 mph E | 6% |
| Friday Night | 54°F | Partly Cloudy | 5 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov) for Marion (42.045, -91.586). Updated through the day.
Growing snapshot for Marion
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
166 days
Hardiness zone
5a
More local growing data for Marion: nearby ZIP 52302 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Alburnett
Bertram
Cedar Rapids
Center Point
Central City
Coggon
Ely
Fairfax
Hiawatha
Mount Vernon
Palo
Prairieburg
Robins
Springville
Walker
Climate data from the nearest NOAA station, Cedar Rapids #1, Ia (1.8 mi from Marion). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.