Carbon, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Carbon, a city in Adams County, Iowa.
Tonight
43°F
Rain Showers Likely
Rain showers likely before 1am. Cloudy. Low around 43, with temperatures rising to around 45 overnight. Northwest wind 12 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Carbon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Rain Showers Likely | 12 to 17 mph NW | 58% |
| Wednesday | 52°F | Slight Chance Rain Showers | 13 to 16 mph W | 17% |
| Wednesday Night | 40°F | Mostly Cloudy | 8 to 12 mph W | 13% |
| Thursday | 52°F | Chance Rain Showers | 8 to 12 mph NW | 45% |
| Thursday Night | 38°F | Mostly Cloudy | 5 to 8 mph NNW | 7% |
| Friday | 53°F | Partly Sunny | 2 to 6 mph N | 4% |
| Friday Night | 34°F | Mostly Cloudy | 1 mph E | 0% |
| Saturday | 57°F | Mostly Sunny | 0 to 5 mph SW | 2% |
| Saturday Night | 36°F | Mostly Clear | 3 mph W | 4% |
| Sunday | 63°F | Sunny | 2 to 6 mph W | 5% |
| Sunday Night | 39°F | Mostly Clear | 6 mph SW | 0% |
| Monday | 66°F | Sunny | 6 to 12 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 2 to 6 mph WNW | 0% |
| Tuesday | 65°F | Mostly Sunny | 2 to 7 mph ENE | 1% |
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
Nearby towns & communities
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 Nov 4, 2026.