Magnolia, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Magnolia, a city in Harrison County, Iowa.
Today
75°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 10am, then a chance of showers and thunderstorms between 10am and 4pm, then a chance of showers and thunderstorms. Mostly cloudy. High near 75, with temperatures falling to around 73 in the afternoon. North wind 7 to 12 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Magnolia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Chance Showers And Thunderstorms | 7 to 12 mph N | 49% |
| Tonight | 59°F | Patchy Smoke | 5 to 12 mph NE | 79% |
| Wednesday | 72°F | Patchy Smoke | 6 mph ENE | 47% |
| Wednesday Night | 55°F | Partly Cloudy | 1 to 5 mph ESE | 2% |
| Thursday | 79°F | Sunny | 1 to 6 mph SE | 1% |
| Thursday Night | 63°F | Mostly Clear | 6 mph SSE | 4% |
| Friday | 84°F | Sunny | 5 to 9 mph S | 4% |
| Friday Night | 68°F | Mostly Clear | 8 mph SSE | 7% |
| Saturday | 89°F | Sunny | 5 to 14 mph S | 2% |
| Saturday Night | 71°F | Mostly Clear | 10 to 15 mph S | 10% |
| Sunday | 90°F | Mostly Sunny | 9 to 13 mph SSE | 7% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms | 14 mph SSE | 21% |
| Monday | 90°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 14 mph SSE | 19% |
| Monday Night | 72°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 14 mph SE | 20% |
Forecast source: National Weather Service (api.weather.gov) for Magnolia (41.693, -95.874). Updated through the day.
Growing snapshot for Magnolia
Last spring frost
Apr 29
First fall frost
Oct 8
Growing season
162 days
Hardiness zone
5b
More local growing data for Magnolia: nearby ZIP 51550 weather · frost dates · planting calendar · Iowa frost dates
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Climate data from the nearest NOAA station, Logan, Ia (5.8 mi from Magnolia). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.