Chillicothe, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chillicothe, a city in Wapello County, Iowa.
Tonight
48°F
Slight Chance Rain Showers then Mostly Cloudy
A slight chance of rain showers before 9pm. Mostly cloudy. Low around 48, with temperatures rising to around 50 overnight. Southwest wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Chillicothe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph SW | 15% |
| Wednesday | 55°F | Mostly Cloudy | 9 to 14 mph WSW | 13% |
| Wednesday Night | 44°F | Mostly Cloudy | 9 mph WSW | 4% |
| Thursday | 54°F | Mostly Cloudy then Chance Rain Showers | 7 to 10 mph WNW | 32% |
| Thursday Night | 41°F | Chance Rain Showers then Mostly Cloudy | 6 mph NNW | 31% |
| Friday | 54°F | Partly Sunny | 3 to 7 mph N | 9% |
| Friday Night | 35°F | Mostly Cloudy | 2 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 0 to 3 mph WNW | 1% |
| Saturday Night | 36°F | Mostly Clear | 3 mph W | 3% |
| Sunday | 62°F | Sunny | 6 mph W | 7% |
| Sunday Night | 38°F | Mostly Clear | 5 mph WSW | 2% |
| Monday | 66°F | Sunny | 5 to 9 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 65°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.