Marion, IA Weather & Growing Conditions
Tonight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 10pm and 1am, then showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 68 overnight. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 83% |
| Saturday | 81°F | Showers And Thunderstorms | 5 to 10 mph S | 79% |
| Saturday Night | 62°F | Showers And Thunderstorms | 5 to 10 mph N | 77% |
| Sunday | 68°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 65% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 60% |
| Monday | 63°F | Rain Showers Likely | 15 mph NE | 56% |
| Monday Night | 51°F | Rain Showers Likely | 10 to 15 mph NE | 56% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 34% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 68°F | Mostly Sunny | 5 mph NE | 9% |
| Thursday Night | 53°F | Partly Cloudy | 0 mph | 8% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marion, IA
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
166 days
Hardiness zone
5a
Explore more for Marion, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Cedar Rapids #1, Ia (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.