Grinnell, KS Weather & Growing Conditions
This Afternoon
58°F
Sunny
Sunny. High near 58, with temperatures falling to around 54 in the afternoon. North wind around 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Sunny | 15 mph N | 0% |
| Tonight | 35°F | Clear | 5 to 10 mph NW | 0% |
| Wednesday | 58°F | Sunny | 5 to 10 mph NW | 0% |
| Wednesday Night | 37°F | Partly Cloudy | 5 mph NW | 12% |
| Thursday | 52°F | Mostly Sunny | 5 to 15 mph N | 2% |
| Thursday Night | 31°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Friday | 55°F | Mostly Sunny | 0 to 5 mph SW | 0% |
| Friday Night | 34°F | Partly Cloudy | 0 to 5 mph SW | 1% |
| Saturday | 61°F | Sunny | 5 mph NW | 3% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 3% |
| Sunday | 64°F | Sunny | 5 mph SW | 0% |
| Sunday Night | 39°F | Clear | 5 mph SW | 0% |
| Monday | 66°F | Sunny | 5 to 10 mph NW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph N | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grinnell, KS
Last spring frost
May 6
First fall frost
Oct 9
Growing season
156 days
Hardiness zone
6a
Explore more for Grinnell, KS: full frost dates · planting calendar · Kansas frost dates
Climate data from the nearest NOAA station, Oakley 4W, Ks (17.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.