Onaga, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onaga, a city in Pottawatomie County, Kansas.
Today
87°F
Slight Chance Rain Showers then Partly Sunny
A slight chance of rain showers before 9am. Partly sunny, with a high near 87. Southeast wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for Onaga
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Slight Chance Rain Showers then Partly Sunny | 5 mph SE | 17% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 29% |
| Wednesday | 77°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 44% |
| Wednesday Night | 62°F | Chance Showers And Thunderstorms | 0 to 10 mph NE | 49% |
| Thursday | 82°F | Chance Showers And Thunderstorms then Mostly Sunny | 0 to 5 mph E | 41% |
| Thursday Night | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 41% |
| Friday | 86°F | Chance Showers And Thunderstorms then Mostly Sunny | 0 to 5 mph S | 41% |
| Friday Night | 69°F | Mostly Clear | 0 to 5 mph S | 4% |
| Saturday | 90°F | Sunny | 0 to 10 mph S | 3% |
| Saturday Night | 73°F | Mostly Clear | 10 mph S | 1% |
| Sunday | 92°F | Sunny | 5 to 10 mph S | 1% |
| Sunday Night | 74°F | Mostly Clear | 10 mph S | 3% |
| Monday | 93°F | Mostly Sunny | 10 to 15 mph S | 3% |
| Monday Night | 74°F | Mostly Clear | 10 mph S | 3% |
Forecast source: National Weather Service (api.weather.gov) for Onaga (39.489, -96.170). Updated through the day.
Growing snapshot for Onaga
Last spring frost
Apr 19
First fall frost
Oct 19
Growing season
182 days
Hardiness zone
6a
More local growing data for Onaga: nearby ZIP 66521 weather · frost dates · planting calendar · Kansas frost dates
Nearby towns & communities
Belvue
Emmett
Havensville
Louisville
Olsburg
St. George
St. Marys
Wabaunsee
Wamego
Westmoreland
Wheaton
Climate data from the nearest NOAA station, Centralia, Ks (18.4 mi from Onaga). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.