Ottawa, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ottawa, a city in Franklin County, Kansas.
Overnight
73°F
Mostly Clear
Mostly clear, with a low around 73. South wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Ottawa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Mostly Clear | 10 mph S | 2% |
| Saturday | 96°F | Sunny | 10 to 15 mph SW | 5% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph NW | 74% |
| Sunday | 81°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 44% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 62% |
| Monday | 72°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 62% |
| Monday Night | 54°F | Mostly Cloudy | 5 to 10 mph N | 5% |
| Tuesday | 69°F | Partly Sunny | 5 to 10 mph NE | 1% |
| Tuesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 72°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph E | 4% |
| Thursday | 75°F | Chance Rain Showers | 0 to 5 mph E | 28% |
| Thursday Night | 58°F | Slight Chance Rain Showers | 0 to 5 mph E | 21% |
| Friday | 75°F | Chance Rain Showers | 5 mph E | 28% |
Forecast source: National Weather Service (api.weather.gov) for Ottawa (38.600, -95.263). Updated through the day.
Growing snapshot for Ottawa
Last spring frost
Apr 18
First fall frost
Oct 20
Growing season
183 days
Hardiness zone
6b
More local growing data for Ottawa: nearby ZIP 66067 weather · frost dates · planting calendar · Kansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ottawa, Ks (0.5 mi from Ottawa). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.