Calamus, IA Weather & Growing Conditions
Tonight
63°F
Showers And Thunderstorms Likely
A chance of rain showers before 11pm, then showers and thunderstorms likely between 11pm and 1am, then showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy. Low around 63, with temperatures rising to around 66 overnight. Northeast wind 0 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Showers And Thunderstorms Likely | 0 to 5 mph NE | 91% |
| 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 | 58% |
| Tuesday Night | 49°F | Partly Cloudy | 5 mph NE | 8% |
| 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 | Mostly Cloudy | 0 mph | 11% |
| Saturday | 70°F | Mostly Sunny | 0 mph | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Calamus, IA
Last spring frost
Apr 27
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5b
Explore more for Calamus, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Lowden, Ia (10.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.