Shannon City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Shannon City, a city in Union County, Iowa.
Today
51°F
Cloudy
Cloudy. High near 51, with temperatures falling to around 48 in the afternoon. West wind 13 to 16 mph, with gusts as high as 23 mph.
7-day forecast for Shannon City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 51°F | Cloudy | 13 to 16 mph W | 14% |
| Tonight | 42°F | Mostly Cloudy | 12 mph W | 14% |
| Thursday | 52°F | Chance Rain Showers then Mostly Cloudy | 12 mph NW | 27% |
| Thursday Night | 40°F | Mostly Cloudy | 8 mph N | 7% |
| Friday | 50°F | Partly Sunny | 3 to 7 mph N | 3% |
| Friday Night | 31°F | Partly Cloudy | 2 mph ENE | 0% |
| Saturday | 52°F | Mostly Sunny | 1 to 5 mph SSW | 0% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 59°F | Sunny | 6 mph W | 0% |
| Sunday Night | 38°F | Clear | 6 mph SW | 0% |
| Monday | 65°F | Sunny | 6 to 10 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 6 mph WNW | 0% |
| Tuesday | 64°F | Sunny | 5 mph N | 0% |
| Tuesday Night | 44°F | Partly Cloudy | 3 mph E | 1% |
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 Nov 4, 2026.