Knoxville, IA
Climate overview — based on NOAA 1991-2020 normals from KNOXVILLE, IA US.
Year-round temperatures (°F)
Climate summary
Knoxville has an annual average temperature of 49.9°F with about 37.4 inches of precipitation per year. The warmest month is July (average high 84.6°F), and the coldest is January (average low 12.5°F). June is typically the wettest month (5.61 in) and January the driest (1.15 in).
Best time to visit Knoxville
Full guide →Climate change signal
All-time records →15 of 366 (4.1%) of Knoxville'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.
| 1890s | 14 | |
| 1900s | 13 | |
| 1910s | 28 | |
| 1920s | 28 | |
| 1930s | 97 | |
| 1940s | 39 | |
| 1950s | 17 | |
| 1960s | 17 | |
| 1970s | 11 | |
| 1980s | 38 | |
| 1990s | 21 | |
| 2000s | 16 | |
| 2010s | 23 | |
| 2020s | 4 |
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 | 29.9°F | 12.5°F | 21.2°F | 1.15 in | — | 5 |
| February | 35.1°F | 17.0°F | 26.0°F | 1.67 in | — | 5 |
| March | 47.6°F | 27.6°F | 37.6°F | 1.87 in | — | 8 |
| April | 60.6°F | 39.2°F | 49.9°F | 3.85 in | — | 10 |
| May | 70.9°F | 51.2°F | 61.1°F | 4.98 in | — | 12 |
| June | 80.6°F | 61.3°F | 70.9°F | 5.61 in | — | 11 |
| July | 84.6°F | 65.6°F | 75.1°F | 4.34 in | — | 8 |
| August | 82.7°F | 63.1°F | 72.9°F | 3.89 in | — | 9 |
| September | 76.2°F | 54.3°F | 65.3°F | 3.66 in | — | 8 |
| October | 63.0°F | 42.2°F | 52.6°F | 3.06 in | — | 8 |
| November | 48.1°F | 29.9°F | 39.0°F | 1.80 in | — | 6 |
| December | 35.5°F | 18.9°F | 27.2°F | 1.57 in | — | 5 |
Climate twins of Knoxville
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).