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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Andover
Camanche
Charlotte
Clinton
Delmar
DeWitt
Goose Lake
Grand Mound
Lost Nation
Low Moor
Toronto
Welton
Wheatland
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.