Calamus, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Calamus, a city in Clinton County, Iowa.
This Afternoon
78°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 78, with temperatures falling to around 71 in the afternoon. South wind around 5 mph. Chance of precipitation is 70%.
7-day forecast for Calamus
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Showers And Thunderstorms Likely | 5 mph S | 65% |
| Tonight | 63°F | Showers And Thunderstorms | 0 to 5 mph NE | 90% |
| Sunday | 66°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 65% |
| Sunday Night | 56°F | Chance Rain Showers | 5 to 10 mph NE | 40% |
| Monday | 63°F | Rain Showers Likely | 10 mph NE | 69% |
| Monday Night | 51°F | Rain Showers Likely | 5 to 10 mph NE | 69% |
| Tuesday | 61°F | Rain Showers Likely | 5 to 10 mph NE | 57% |
| Tuesday Night | 49°F | Partly Cloudy | 5 mph NE | 9% |
| Wednesday | 64°F | Partly Sunny | 5 mph NE | 3% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 66°F | Partly Sunny | 0 mph | 9% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 0 mph | 18% |
| Friday | 69°F | Partly Sunny | 0 mph | 12% |
| Friday Night | 54°F | Partly Cloudy | 0 mph | 11% |
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 20, 2026.