Forest City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Forest City, a city in Winnebago County, Iowa.
Tonight
42°F
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms. Cloudy. Low around 42, with temperatures rising to around 47 overnight. Northwest wind 8 to 12 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Forest City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 42°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 8 to 12 mph NW | 94% |
| Wednesday | 49°F | Rain Showers | 10 to 16 mph W | 91% |
| Wednesday Night | 38°F | Rain Showers | 13 mph WNW | 91% |
| Thursday | 49°F | Rain Showers Likely | 12 to 15 mph NNW | 62% |
| Thursday Night | 32°F | Mostly Cloudy | 5 to 10 mph N | 12% |
| Friday | 47°F | Partly Sunny | 2 to 6 mph NNE | 0% |
| Friday Night | 28°F | Partly Cloudy | 1 mph NNW | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 6 mph SW | 1% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph W | 4% |
| Sunday | 57°F | Sunny | 7 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 6 mph SW | 1% |
| Monday | 60°F | Mostly Sunny | 6 to 12 mph WSW | 0% |
| Monday Night | 36°F | Mostly Clear | 6 mph WNW | 1% |
| Tuesday | 57°F | Mostly Sunny | 6 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Forest City (43.257, -93.637). Updated through the day.
Growing snapshot for Forest City
Last spring frost
Apr 30
First fall frost
Oct 7
Growing season
159 days
Hardiness zone
5a
More local growing data for Forest City: nearby ZIP 50436 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Forest City 2 Nne, Ia (3.3 mi from Forest City). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.