Chillicothe, IA Weather & Growing Conditions
This Afternoon
71°F
Rain Showers Likely
Rain showers likely. Mostly cloudy. High near 71, with temperatures falling to around 64 in the afternoon. South southeast wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Rain Showers Likely | 10 mph SSE | 58% |
| Tonight | 48°F | Chance Rain Showers then Mostly Cloudy | 6 to 9 mph SSW | 45% |
| 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% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Chillicothe, IA
Last spring frost
Apr 23
First fall frost
Oct 14
Growing season
172 days
Hardiness zone
5b
Explore more for Chillicothe, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Ottumwa Industrial Ap, Ia (4.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.