Harman US

Calamus, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Calamus, a city in Clinton County, Iowa.

Today
81°F
Occasional Showers And Thunderstorms then Chance Showers And Thunderstorms
Occasional showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and 1pm, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 81. South wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast for Calamus

WhenTempForecastWindPrecip
Today 81°F Occasional Showers And Thunderstorms then Chance Showers And Thunderstorms 10 mph S 93%
Tonight 63°F Chance Showers And Thunderstorms then Showers And Thunderstorms 5 to 10 mph NW 80%
Sunday 69°F Rain Showers Likely 5 to 10 mph NE 70%
Sunday Night 56°F Chance Rain Showers 5 to 10 mph NE 40%
Monday 64°F Chance Rain Showers 10 mph NE 53%
Monday Night 50°F Chance Rain Showers 5 to 10 mph NE 47%
Tuesday 63°F Slight Chance Rain Showers 5 to 10 mph NE 20%
Tuesday Night 47°F Partly Cloudy 5 mph NE 6%
Wednesday 66°F Mostly Sunny 5 mph NE 2%
Wednesday Night 50°F Partly Cloudy 0 to 5 mph NE 1%
Thursday 68°F Mostly Sunny 0 to 5 mph NE 6%
Thursday Night 53°F Partly Cloudy 0 mph 5%
Friday 71°F Mostly Sunny 0 to 5 mph NE 4%
Friday Night 53°F Partly Cloudy 0 mph 4%

Forecast source: National Weather Service (api.weather.gov) for Calamus (41.826, -90.760). Updated through the day.

Growing snapshot for Calamus

Last spring frost
Apr 27
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5b

More local growing data for Calamus: nearby ZIP 52729 weather · frost dates · planting calendar · Iowa frost dates

Nearby towns & communities

All Iowa locations ›

Climate data from the nearest NOAA station, Lowden, Ia (10.5 mi from Calamus). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.