Chillicothe, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chillicothe, a city in Wapello County, Iowa.
Today
90°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Mostly sunny. High near 90, with temperatures falling to around 88 in the afternoon. West southwest wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Chillicothe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 mph WSW | 29% |
| Tonight | 66°F | Showers And Thunderstorms | 8 mph NNE | 82% |
| Wednesday | 78°F | Showers And Thunderstorms Likely | 3 to 7 mph NNE | 92% |
| Wednesday Night | 61°F | Showers And Thunderstorms Likely | 2 to 7 mph NNE | 64% |
| Thursday | 83°F | Chance Rain Showers then Mostly Sunny | 3 mph NE | 41% |
| Thursday Night | 62°F | Mostly Clear | 2 mph E | 2% |
| Friday | 87°F | Sunny | 1 to 5 mph SSE | 7% |
| Friday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 mph SSE | 15% |
| Saturday | 91°F | Sunny | 3 to 7 mph SSW | 13% |
| Saturday Night | 72°F | Mostly Clear | 7 to 10 mph SSW | 10% |
| Sunday | 92°F | Mostly Sunny | 9 to 13 mph SSW | 10% |
| Sunday Night | 71°F | Partly Cloudy then Chance Showers And Thunderstorms | 8 to 12 mph S | 26% |
| Monday | 92°F | Chance Showers And Thunderstorms then Mostly Sunny | 9 to 13 mph SSW | 26% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 12 mph S | 28% |
Forecast source: National Weather Service (api.weather.gov) for Chillicothe (41.086, -92.530). Updated through the day.
Growing snapshot for Chillicothe
Last spring frost
Apr 23
First fall frost
Oct 14
Growing season
172 days
Hardiness zone
5b
More local growing data for Chillicothe: nearby ZIP 52548 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ottumwa Industrial Ap, Ia (4.6 mi from Chillicothe). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.