Vassar, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Vassar, a community in Osage County, Kansas.
Overnight
72°F
Mostly Clear
Mostly clear, with a low around 72. South wind around 10 mph, with gusts as high as 25 mph.
7-day forecast for Vassar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Mostly Clear | 10 mph S | 3% |
| Saturday | 95°F | Sunny | 10 to 15 mph SW | 8% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph W | 81% |
| Sunday | 80°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 62% |
| Sunday Night | 61°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 58% |
| Monday | 71°F | Chance Rain Showers | 5 to 10 mph N | 54% |
| Monday Night | 53°F | Mostly Cloudy | 5 to 10 mph NE | 5% |
| Tuesday | 68°F | Partly Sunny | 5 to 10 mph NE | 1% |
| Tuesday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 71°F | Mostly Sunny | 0 to 5 mph E | 3% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph E | 8% |
| Thursday | 74°F | Chance Rain Showers | 0 to 5 mph E | 32% |
| Thursday Night | 57°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 27% |
| Friday | 75°F | Chance Showers And Thunderstorms | 5 mph E | 28% |
Forecast source: National Weather Service (api.weather.gov) for Vassar (38.649, -95.610). Updated through the day.
Growing snapshot for Vassar
Last spring frost
Apr 8
First fall frost
Oct 31
Growing season
205 days
Hardiness zone
6b
More local growing data for Vassar: nearby ZIP 66543 weather · frost dates · planting calendar · Kansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Pomona Lake, Ks (1.8 mi from Vassar). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.