Promise City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Promise City, a city in Wayne County, Iowa.
This Afternoon
85°F
Partly Sunny
Partly sunny, with a high near 85. South southwest wind around 9 mph, with gusts as high as 22 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Promise City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Partly Sunny | 9 mph SSW | 13% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph NNW | 70% |
| Sunday | 68°F | Chance Showers And Thunderstorms | 5 to 12 mph N | 51% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 12 mph NE | 61% |
| Monday | 61°F | Rain Showers | 12 mph NE | 78% |
| Monday Night | 52°F | Showers And Thunderstorms | 7 to 10 mph NNE | 75% |
| Tuesday | 59°F | Mostly Cloudy | 8 mph NE | 14% |
| Tuesday Night | 47°F | Partly Cloudy | 2 to 7 mph NE | 3% |
| Wednesday | 63°F | Mostly Sunny | 5 mph NE | 2% |
| Wednesday Night | 51°F | Partly Cloudy | 3 mph ENE | 4% |
| Thursday | 67°F | Partly Sunny | 3 mph E | 12% |
| Thursday Night | 55°F | Mostly Cloudy | 2 mph E | 14% |
| Friday | 69°F | Partly Sunny | 1 to 5 mph E | 14% |
| Friday Night | 56°F | Mostly Cloudy | 3 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov) for Promise City (40.748, -93.148). Updated through the day.
Growing snapshot for Promise City
Last spring frost
Apr 18
First fall frost
Oct 23
Growing season
187 days
Hardiness zone
5b
More local growing data for Promise City: nearby ZIP 52583 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Rathbun Dam, Ia (13.3 mi from Promise City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.