Onaga, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onaga, a city in Pottawatomie County, Kansas.
Today
92°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast for Onaga
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 20% |
| Tonight | 64°F | Chance Showers And Thunderstorms | 5 mph N | 76% |
| Sunday | 72°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 43% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 44% |
| Monday | 64°F | Chance Rain Showers then Mostly Cloudy | 5 mph N | 32% |
| Monday Night | 52°F | Mostly Cloudy | 5 mph NE | 4% |
| Tuesday | 62°F | Partly Sunny | 5 mph NE | 1% |
| Tuesday Night | 48°F | Partly Cloudy | 0 to 5 mph E | 0% |
| Wednesday | 65°F | Mostly Sunny | 0 to 5 mph E | 3% |
| Wednesday Night | 53°F | Partly Cloudy then Slight Chance Rain Showers | 0 mph | 17% |
| Thursday | 68°F | Chance Rain Showers | 0 to 5 mph SE | 34% |
| Thursday Night | 57°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 27% |
| Friday | 69°F | Chance Showers And Thunderstorms | 5 mph SE | 30% |
| Friday Night | 59°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 21% |
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 Sep 19, 2026.