Keystone, IA Weather & Growing Conditions
Today
82°F
Partly Sunny then Chance Showers And Thunderstorms
A slight chance of rain showers between noon and 1pm, then a chance of showers and thunderstorms. Partly sunny. High near 82, with temperatures falling to around 78 in the afternoon. West wind 5 to 10 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph W | 40% |
| Tonight | 62°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 80% |
| Wednesday | 75°F | Showers And Thunderstorms Likely | 5 mph NE | 66% |
| Wednesday Night | 56°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 28% |
| Thursday | 80°F | Sunny | 0 to 5 mph NE | 6% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 1% |
| Friday | 83°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 64°F | Mostly Clear | 5 mph S | 13% |
| Saturday | 87°F | Sunny | 5 mph S | 9% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 16% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph S | 16% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 36% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 36% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 mph E | 34% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Keystone, IA
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a
Explore more for Keystone, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Belle Plaine, Ia (9.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.