Calmar, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Calmar, a city in Winneshiek County, Iowa.
This Afternoon
67°F
Showers And Thunderstorms Likely
Rain showers before 3pm, then showers and thunderstorms likely. Cloudy. High near 67, with temperatures falling to around 64 in the afternoon. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Calmar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms Likely | 9 to 14 mph S | 79% |
| Tonight | 51°F | Showers And Thunderstorms | 10 mph SE | 89% |
| Wednesday | 54°F | Rain Showers Likely | 9 to 16 mph SW | 73% |
| Wednesday Night | 45°F | Rain Showers | 15 mph W | 79% |
| Thursday | 50°F | Rain Showers | 13 mph NW | 77% |
| Thursday Night | 38°F | Mostly Cloudy | 9 to 13 mph N | 11% |
| Friday | 47°F | Partly Sunny | 3 to 12 mph N | 2% |
| Friday Night | 31°F | Partly Cloudy | 1 mph NW | 0% |
| Saturday | 51°F | Mostly Sunny | 0 to 3 mph W | 1% |
| Saturday Night | 36°F | Partly Cloudy | 2 to 6 mph W | 5% |
| Sunday | 57°F | Sunny | 7 mph W | 11% |
| Sunday Night | 37°F | Mostly Clear | 6 mph SW | 3% |
| Monday | 59°F | Mostly Sunny | 6 to 12 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 7 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Calmar (43.181, -91.868). Updated through the day.
Growing snapshot for Calmar
Last spring frost
May 3
First fall frost
Oct 7
Growing season
157 days
Hardiness zone
5a
More local growing data for Calmar: nearby ZIP 52132 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Decorah, Ia (9.3 mi from Calmar). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.