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
86°F
Partly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3pm. Partly sunny. High near 86, with temperatures falling to around 83 in the afternoon. West southwest wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Barnes City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 7 mph WSW | 23% |
| Tonight | 63°F | Showers And Thunderstorms | 9 mph NNE | 89% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 7 mph NNE | 74% |
| Wednesday Night | 57°F | Chance Showers And Thunderstorms | 6 mph NNE | 50% |
| Thursday | 81°F | Sunny | 3 mph NE | 14% |
| Thursday Night | 59°F | Mostly Clear | 2 mph E | 1% |
| Friday | 84°F | Sunny | 1 to 5 mph SE | 5% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 6 mph SSE | 16% |
| Saturday | 88°F | Sunny then Slight Chance Rain Showers | 3 to 7 mph S | 15% |
| Saturday Night | 70°F | Slight Chance Rain Showers then Mostly Clear | 7 to 10 mph S | 15% |
| Sunday | 89°F | Sunny | 10 mph SSW | 14% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 9 mph SSE | 33% |
| Monday | 89°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 8 to 12 mph SSW | 33% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 12 mph ESE | 31% |
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 Aug 4, 2026.