Calamus, IA Weather & Growing Conditions
Today
85°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 4pm. Mostly sunny. High near 85, with temperatures falling to around 82 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 85% |
| Wednesday | 77°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph N | 72% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph N | 60% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 mph | 33% |
| Thursday Night | 60°F | Mostly Clear | 0 mph | 4% |
| Friday | 82°F | Mostly Sunny | 0 mph | 5% |
| Friday Night | 64°F | Mostly Clear | 0 mph | 9% |
| Saturday | 85°F | Sunny | 0 to 5 mph S | 11% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph S | 19% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 19% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 mph SW | 37% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph S | 36% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 5 mph S | 37% |
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 Aug 4, 2026.