Barnes City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Barnes City, a city in Mahaska County, Iowa.
Today
82°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 82, with temperatures falling to around 80 in the afternoon. South southwest wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Barnes City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Chance Showers And Thunderstorms | 6 to 9 mph SSW | 54% |
| Tonight | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 8 mph NNW | 65% |
| Sunday | 67°F | Chance Rain Showers | 9 to 13 mph NNE | 60% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 14 mph NE | 57% |
| Monday | 62°F | Rain Showers Likely | 13 mph NE | 57% |
| Monday Night | 51°F | Chance Rain Showers | 8 to 12 mph NE | 53% |
| Tuesday | 60°F | Chance Rain Showers then Partly Sunny | 10 mph NE | 30% |
| Tuesday Night | 46°F | Mostly Clear | 7 mph NE | 4% |
| Wednesday | 64°F | Sunny | 6 mph NE | 1% |
| Wednesday Night | 50°F | Partly Cloudy | 3 mph ENE | 3% |
| Thursday | 66°F | Partly Sunny | 5 mph E | 9% |
| Thursday Night | 53°F | Mostly Cloudy | 2 mph E | 6% |
| Friday | 68°F | Partly Sunny | 6 mph E | 6% |
| Friday Night | 54°F | Partly Cloudy | 3 mph E | 9% |
Forecast source: National Weather Service (api.weather.gov) for Barnes City (41.507, -92.470). Updated through the day.
Growing snapshot for Barnes City
Last spring frost
Apr 21
First fall frost
Oct 16
Growing season
176 days
Hardiness zone
5b
More local growing data for Barnes City: nearby ZIP 50027 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Oskaloosa, Ia (14.4 mi from Barnes City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.