Grinnell, KS Weather & Growing Conditions
Today
81°F
Partly Sunny then Slight Chance Rain Showers
A slight chance of rain showers between 1pm and 2pm. Partly sunny. High near 81, with temperatures falling to around 79 in the afternoon. Northeast wind 15 to 20 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Partly Sunny then Slight Chance Rain Showers | 15 to 20 mph NE | 15% |
| Tonight | 59°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 15 mph NE | 23% |
| Wednesday | 81°F | Slight Chance Rain Showers then Partly Sunny | 5 to 10 mph NE | 20% |
| Wednesday Night | 60°F | Partly Cloudy then Slight Chance Rain Showers | 5 to 10 mph E | 20% |
| Thursday | 90°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph SE | 20% |
| Thursday Night | 64°F | Mostly Clear | 5 to 10 mph SE | 11% |
| Friday | 96°F | Sunny | 5 to 10 mph SE | 3% |
| Friday Night | 66°F | Clear | 5 to 10 mph S | 4% |
| Saturday | 101°F | Sunny | 5 to 15 mph S | 0% |
| Saturday Night | 70°F | Mostly Clear | 15 mph S | 1% |
| Sunday | 102°F | Sunny | 10 to 15 mph S | 1% |
| Sunday Night | 71°F | Mostly Clear | 15 mph S | 2% |
| Monday | 101°F | Sunny | 15 mph S | 0% |
| Monday Night | 71°F | Mostly Clear | 10 to 15 mph S | 5% |
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 Aug 4, 2026.