McCallsburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McCallsburg, a city in Story County, Iowa.
Tonight
60°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms between 1am and 3am, then a slight chance of showers and thunderstorms between 3am and 5am. Mostly cloudy. Low around 60, with temperatures rising to around 62 overnight. North northeast wind around 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for McCallsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Chance Showers And Thunderstorms | 9 mph NNE | 39% |
| Sunday | 65°F | Chance Rain Showers | 10 to 14 mph NE | 49% |
| Sunday Night | 55°F | Rain Showers Likely | 13 mph ENE | 55% |
| Monday | 59°F | Rain Showers | 13 mph NE | 81% |
| Monday Night | 50°F | Rain Showers | 7 to 10 mph NE | 81% |
| Tuesday | 60°F | Slight Chance Rain Showers then Partly Sunny | 8 mph NE | 18% |
| Tuesday Night | 47°F | Partly Cloudy | 2 to 6 mph ENE | 4% |
| Wednesday | 64°F | Mostly Sunny | 5 mph E | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph E | 7% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph SE | 20% |
| Thursday Night | 56°F | Slight Chance Rain Showers | 2 mph ESE | 20% |
| Friday | 68°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph ESE | 20% |
| Friday Night | 58°F | Mostly Cloudy | 3 mph ESE | 9% |
| Saturday | 69°F | Chance Rain Showers | 3 to 7 mph SE | 30% |
Forecast source: National Weather Service (api.weather.gov) for McCallsburg (42.165, -93.391). Updated through the day.
Growing snapshot for McCallsburg
Last spring frost
Apr 24
First fall frost
Oct 12
Growing season
170 days
Hardiness zone
5a
More local growing data for McCallsburg: nearby ZIP 50154 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Colo, Ia (11.6 mi from McCallsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.