Vassar, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Vassar, a community in Osage County, Kansas.
Overnight
68°F
Mostly Clear
Mostly clear, with a low around 68. Southeast wind around 5 mph.
7-day forecast for Vassar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Mostly Clear | 5 mph SE | 1% |
| Tuesday | 92°F | Mostly Sunny | 5 to 10 mph S | 3% |
| Tuesday Night | 71°F | Partly Cloudy | 5 to 10 mph SE | 14% |
| Wednesday | 87°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 36% |
| Wednesday Night | 66°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph N | 64% |
| Thursday | 86°F | Showers And Thunderstorms Likely then Partly Sunny | 5 mph NE | 64% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 52% |
| Friday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 52% |
| Friday Night | 70°F | Mostly Clear | 5 mph S | 10% |
| Saturday | 91°F | Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 73°F | Mostly Clear | 10 to 15 mph S | 2% |
| Sunday | 93°F | Sunny | 10 to 15 mph S | 1% |
| Sunday Night | 74°F | Mostly Clear | 10 to 15 mph S | 1% |
| Monday | 94°F | Sunny | 15 mph S | 1% |
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 Aug 4, 2026.