Clinton, IA Weather & Growing Conditions
Today
85°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Mostly sunny. High near 85, with temperatures falling to around 83 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Tonight | 67°F | Showers And Thunderstorms Likely | 5 mph NW | 89% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph N | 70% |
| Wednesday Night | 61°F | Showers And Thunderstorms Likely | 5 mph N | 67% |
| Thursday | 79°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 35% |
| Thursday Night | 61°F | Mostly Clear | 0 mph | 6% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SE | 4% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 85°F | Sunny | 5 to 10 mph SW | 11% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 20% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SW | 20% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 38% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 38% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph W | 38% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Clinton, IA
Last spring frost
Apr 13
First fall frost
Oct 26
Growing season
195 days
Hardiness zone
5b
Explore more for Clinton, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Fulton L&D #13, Il (5.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.