Onaga, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onaga, a city in Pottawatomie County, Kansas.
This Afternoon
63°F
Chance Rain Showers
A chance of rain showers. Cloudy. High near 63, with temperatures falling to around 53 in the afternoon. Northwest wind around 15 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.
7-day forecast for Onaga
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Chance Rain Showers | 15 mph NW | 28% |
| Tonight | 43°F | Slight Chance Drizzle then Cloudy | 5 to 10 mph NW | 24% |
| Wednesday | 56°F | Partly Sunny | 5 to 10 mph W | 0% |
| Wednesday Night | 38°F | Mostly Clear | 0 to 5 mph W | 2% |
| Thursday | 55°F | Mostly Sunny | 5 mph NW | 12% |
| Thursday Night | 37°F | Partly Cloudy | 0 mph | 0% |
| Friday | 55°F | Partly Sunny | 0 to 5 mph N | 0% |
| Friday Night | 36°F | Mostly Cloudy | 0 mph | 0% |
| Saturday | 61°F | Mostly Sunny | 0 to 5 mph W | 4% |
| Saturday Night | 38°F | Mostly Clear | 0 mph | 5% |
| Sunday | 65°F | Sunny | 0 to 5 mph W | 2% |
| Sunday Night | 41°F | Clear | 0 mph | 0% |
| Monday | 68°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 43°F | Mostly Clear | 0 mph | 0% |
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 Nov 4, 2026.