Shannon City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Shannon City, a city in Union County, Iowa.
This Afternoon
83°F
Slight Chance Showers And Thunderstorms
A slight chance of rain showers between 3pm and 4pm, then a slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny. High near 83, with temperatures falling to around 81 in the afternoon. West wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Shannon City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Slight Chance Showers And Thunderstorms | 7 to 10 mph W | 17% |
| Tonight | 62°F | Showers And Thunderstorms Likely | 5 to 8 mph N | 67% |
| Sunday | 66°F | Chance Showers And Thunderstorms | 8 to 12 mph NNE | 45% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 8 to 12 mph NE | 64% |
| Monday | 59°F | Rain Showers Likely | 12 mph NE | 64% |
| Monday Night | 52°F | Chance Rain Showers | 7 to 10 mph NE | 46% |
| Tuesday | 58°F | Partly Sunny | 9 mph NE | 9% |
| Tuesday Night | 46°F | Partly Cloudy | 3 to 7 mph ENE | 7% |
| Wednesday | 62°F | Mostly Sunny | 5 mph ENE | 2% |
| Wednesday Night | 51°F | Partly Cloudy | 3 mph E | 7% |
| Thursday | 65°F | Slight Chance Rain Showers | 5 mph ESE | 24% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 3 mph ESE | 22% |
| Friday | 66°F | Slight Chance Rain Showers | 6 mph ESE | 22% |
| Friday Night | 56°F | Mostly Cloudy | 5 mph ESE | 12% |
Forecast source: National Weather Service (api.weather.gov) for Shannon City (40.899, -94.264). Updated through the day.
Growing snapshot for Shannon City
Last spring frost
Apr 28
First fall frost
Oct 11
Growing season
164 days
Hardiness zone
5b
More local growing data for Shannon City: nearby ZIP 50861 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Creston 2 Sw, Ia (11.4 mi from Shannon City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.