Climate almanac
Knoxville
Iowa, United States · 41.32°, -93.11°
What is the climate like in Knoxville?
The best time to visit Knoxville is typically May – September, with trip comfort peaking in August (7.0/10). Knoxville is warmest in July, when daily highs average 87°F (30°C), and coolest in January, when lows fall to about 17°F (-8°C). The wettest month is typically May and the driest is February; the year sees roughly 37 in (943 mm) of precipitation.
- Best time to visitMay – September — comfort peaks in August (7.0/10)
- Warmest monthJuly — average high 87°F (30°C)
- Coolest monthJanuary — average low 17°F (-8°C)
- Wettest monthMay (5.2 in (132 mm))
- Driest monthFebruary (1.5 in (37 mm))
- Annual precipitation37 in (943 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromKnoxville, 1 km away (1893-2023)