Cotter, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cotter, a city in Louisa County, Iowa.
Tonight
50°F
Chance Rain Showers then Mostly Cloudy
A chance of rain showers before 10pm. Mostly cloudy. Low around 50, with temperatures rising to around 52 overnight. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
7-day forecast for Cotter
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph S | 41% |
| Wednesday | 54°F | Slight Chance Rain Showers | 15 mph SW | 22% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 to 15 mph SW | 10% |
| Thursday | 54°F | Chance Rain Showers | 10 to 15 mph W | 32% |
| Thursday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 35% |
| Friday | 52°F | Partly Sunny | 5 to 10 mph N | 11% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Saturday | 53°F | Partly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 36°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 59°F | Sunny | 5 to 10 mph W | 8% |
| Sunday Night | 37°F | Mostly Clear | 5 mph W | 3% |
| Monday | 64°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 63°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Cotter (41.292, -91.462). Updated through the day.
Growing snapshot for Cotter
Last spring frost
Apr 26
First fall frost
Oct 10
Growing season
167 days
Hardiness zone
5b
More local growing data for Cotter: nearby ZIP 52738 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Columbus Junction, Ia (1 mi from Cotter). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.