Chillicothe, IA
Climate overview — based on NOAA 1991-2020 normals from OTTUMWA INDUSTRIAL AP, IA US.
Year-round temperatures (°F)
Climate summary
Chillicothe has an annual average temperature of 50.7°F with about 37 inches of precipitation per year and 23.6 inches of snow. The warmest month is July (average high 85.7°F), and the coldest is January (average low 13.8°F). June is typically the wettest month (5.38 in) and January the driest (1.01 in). Snow typically falls from October through April.
Best time to visit Chillicothe
Full guide →Climate change signal
All-time records →61 of 366 (16.7%) of Chillicothe's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1940s | 9 | |
| 1950s | 48 | |
| 1960s | 48 | |
| 1970s | 25 | |
| 1980s | 72 | |
| 1990s | 40 | |
| 2000s | 35 | |
| 2010s | 56 | |
| 2020s | 33 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 32.0°F | 13.8°F | 22.9°F | 1.01 in | 7.1 in | 7 |
| February | 36.8°F | 18.0°F | 27.4°F | 1.41 in | 5.8 in | 7 |
| March | 50.2°F | 28.9°F | 39.6°F | 2.24 in | 3.0 in | 10 |
| April | 62.8°F | 39.4°F | 51.1°F | 3.75 in | 1.4 in | 12 |
| May | 72.9°F | 51.0°F | 62.0°F | 5.03 in | — | 13 |
| June | 82.2°F | 61.0°F | 71.6°F | 5.38 in | — | 11 |
| July | 85.7°F | 64.5°F | 75.1°F | 3.87 in | — | 9 |
| August | 84.0°F | 62.0°F | 73.0°F | 4.44 in | — | 9 |
| September | 77.3°F | 53.3°F | 65.3°F | 3.50 in | — | 8 |
| October | 64.2°F | 41.6°F | 52.9°F | 2.81 in | 0.5 in | 9 |
| November | 49.7°F | 29.5°F | 39.6°F | 2.09 in | 1.6 in | 8 |
| December | 37.2°F | 19.7°F | 28.4°F | 1.44 in | 4.2 in | 7 |
Climate twins of Chillicothe
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).