Cotter, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cotter, a city in Louisa County, Iowa.
This Afternoon
81°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 5pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast for Cotter
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 25% |
| Tonight | 65°F | Showers And Thunderstorms | 5 mph NW | 89% |
| Sunday | 69°F | Showers And Thunderstorms Likely | 5 to 15 mph NE | 72% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 61% |
| Monday | 62°F | Rain Showers | 15 mph NE | 77% |
| Monday Night | 53°F | Rain Showers Likely | 10 to 15 mph NE | 63% |
| Tuesday | 61°F | Chance Rain Showers | 10 mph NE | 39% |
| Tuesday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 64°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 68°F | Partly Sunny | 0 to 5 mph NE | 8% |
| Thursday Night | 57°F | Slight Chance Rain Showers | 0 mph | 17% |
| Friday | 71°F | Slight Chance Rain Showers | 0 to 5 mph E | 17% |
| Friday Night | 57°F | Partly Cloudy | 0 to 5 mph E | 9% |
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 Sep 20, 2026.