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
86°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Partly sunny. High near 86, with temperatures falling to around 83 in the afternoon. Southeast wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Shannon City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 8 mph SE | 31% |
| Tonight | 64°F | Showers And Thunderstorms Likely | 10 mph NNE | 72% |
| Wednesday | 73°F | Showers And Thunderstorms Likely | 9 mph NE | 81% |
| Wednesday Night | 59°F | Chance Showers And Thunderstorms | 3 to 8 mph NE | 43% |
| Thursday | 81°F | Mostly Sunny | 5 mph E | 9% |
| Thursday Night | 63°F | Mostly Clear | 3 mph ESE | 7% |
| Friday | 85°F | Mostly Sunny | 3 to 7 mph S | 7% |
| Friday Night | 67°F | Mostly Clear | 6 mph S | 9% |
| Saturday | 89°F | Sunny | 5 to 10 mph SSW | 3% |
| Saturday Night | 72°F | Mostly Clear | 10 to 14 mph S | 8% |
| Sunday | 91°F | Sunny | 14 mph SSW | 8% |
| Sunday Night | 72°F | Partly Cloudy | 14 mph S | 14% |
| Monday | 92°F | Mostly Sunny | 12 to 15 mph SSW | 14% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 12 to 15 mph S | 23% |
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 Aug 4, 2026.