La Porte City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for La Porte City, a city in Black Hawk County, Iowa.
Today
82°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Partly sunny. High near 82, with temperatures falling to around 78 in the afternoon. West wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for La Porte City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Showers And Thunderstorms Likely | 8 mph W | 60% |
| Tonight | 62°F | Showers And Thunderstorms | 5 to 8 mph N | 87% |
| Wednesday | 75°F | Chance Showers And Thunderstorms | 5 mph NNE | 48% |
| Wednesday Night | 56°F | Chance Rain Showers | 5 mph N | 29% |
| Thursday | 80°F | Sunny | 3 mph ENE | 4% |
| Thursday Night | 59°F | Mostly Clear | 2 mph SE | 0% |
| Friday | 82°F | Sunny | 2 to 8 mph SSE | 4% |
| Friday Night | 65°F | Mostly Clear | 7 mph S | 12% |
| Saturday | 86°F | Sunny | 5 to 8 mph S | 10% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 12 mph S | 18% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph S | 18% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 9 mph SSE | 37% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 12 mph SSE | 37% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 12 mph E | 35% |
Forecast source: National Weather Service (api.weather.gov) for La Porte City (42.314, -92.191). Updated through the day.
Growing snapshot for La Porte City
Last spring frost
May 3
First fall frost
Oct 3
Growing season
151 days
Hardiness zone
5a
More local growing data for La Porte City: nearby ZIP 50651 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Vinton, Ia (14.6 mi from La Porte City). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.