Climate almanac

Knoxville

Iowa, United States · 41.32°, -93.11°

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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)