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
52°F
Slight Chance Rain Showers
A slight chance of rain showers before 2pm. Cloudy. High near 52, with temperatures falling to around 50 in the afternoon. West southwest wind around 17 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
7-day forecast for La Porte City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Slight Chance Rain Showers | 17 mph WSW | 20% |
| Tonight | 44°F | Chance Rain Showers | 15 mph W | 27% |
| Thursday | 54°F | Chance Rain Showers | 14 mph NW | 45% |
| Thursday Night | 37°F | Mostly Cloudy | 8 to 12 mph N | 9% |
| Friday | 49°F | Mostly Sunny | 6 to 9 mph N | 3% |
| Friday Night | 29°F | Mostly Clear | 1 to 5 mph NNW | 0% |
| Saturday | 52°F | Sunny | 1 to 6 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 57°F | Sunny | 5 to 8 mph W | 3% |
| Sunday Night | 35°F | Clear | 6 mph WSW | 0% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 3 to 7 mph W | 0% |
| Tuesday | 62°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 3 mph NNE | 1% |
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 Nov 4, 2026.