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Carbon, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Carbon, a city in Adams County, Iowa.

Today
82°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 4pm, then a slight chance of showers and thunderstorms. Partly sunny. High near 82, with temperatures falling to around 78 in the afternoon. West southwest wind 3 to 9 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Carbon

WhenTempForecastWindPrecip
Today 82°F Chance Showers And Thunderstorms 3 to 9 mph WSW 46%
Tonight 62°F Chance Showers And Thunderstorms 8 mph N 47%
Sunday 67°F Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 8 to 12 mph NNE 45%
Sunday Night 57°F Chance Showers And Thunderstorms 8 to 12 mph NE 48%
Monday 61°F Chance Rain Showers 12 mph NE 52%
Monday Night 52°F Chance Rain Showers then Mostly Cloudy 5 to 10 mph NE 52%
Tuesday 60°F Partly Sunny 6 to 9 mph ENE 6%
Tuesday Night 46°F Partly Cloudy 2 to 6 mph E 3%
Wednesday 64°F Mostly Sunny 5 mph E 1%
Wednesday Night 51°F Partly Cloudy 3 mph ESE 11%
Thursday 66°F Chance Rain Showers 5 mph SE 26%
Thursday Night 55°F Mostly Cloudy then Slight Chance Rain Showers 3 mph ESE 22%
Friday 67°F Slight Chance Rain Showers 3 to 7 mph ESE 22%
Friday Night 56°F Mostly Cloudy 5 mph ESE 13%

Forecast source: National Weather Service (api.weather.gov) for Carbon (41.050, -94.825). Updated through the day.

Growing snapshot for Carbon

Last spring frost
Apr 27
First fall frost
Oct 12
Growing season
168 days
Hardiness zone
5b

More local growing data for Carbon: nearby ZIP 50839 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Corning, Ia (5.3 mi from Carbon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.