Postville, IA Weather & Growing Conditions
Today
76°F
Isolated Rain Showers then Scattered Showers And Thunderstorms
Isolated rain showers between 8am and noon, then scattered showers and thunderstorms. Mostly cloudy. High near 76, with temperatures falling to around 73 in the afternoon. West wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Isolated Rain Showers then Scattered Showers And Thunderstorms | 5 to 8 mph W | 33% |
| Tonight | 60°F | Scattered Showers And Thunderstorms | 5 mph NW | 64% |
| Wednesday | 73°F | Slight Chance Rain Showers then Partly Sunny | 3 mph NW | 16% |
| Wednesday Night | 54°F | Mostly Clear | 2 mph NW | 2% |
| Thursday | 78°F | Sunny | 1 mph S | 1% |
| Thursday Night | 58°F | Mostly Clear | 2 mph S | 0% |
| Friday | 80°F | Sunny | 2 to 7 mph S | 4% |
| Friday Night | 63°F | Mostly Clear | 6 mph S | 10% |
| Saturday | 82°F | Mostly Sunny | 6 mph SW | 9% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 7 mph S | 32% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 8 mph S | 32% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 6 mph S | 41% |
| Monday | 82°F | Chance Showers And Thunderstorms | 7 mph S | 41% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 7 mph NE | 34% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Postville, IA
Last spring frost
May 1
First fall frost
Oct 3
Growing season
153 days
Hardiness zone
5a
Explore more for Postville, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Postville, Ia (1.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.