Climate almanac

Morton

Illinois, United States · 40.61°, -89.46°

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What is the climate like in Morton?

The best time to visit Morton is typically August – September, with trip comfort peaking in September (7.5/10). Morton is warmest in July, when daily highs average 85°F (30°C), and coolest in January, when lows fall to about 22°F (-6°C). The wettest month is typically May and the driest is December; the year sees roughly 42 in (1076 mm) of precipitation.

  • Best time to visitAugust – September — comfort peaks in September (7.5/10)
  • Warmest monthJuly — average high 85°F (30°C)
  • Coolest monthJanuary — average low 22°F (-6°C)
  • Wettest monthMay (5.0 in (126 mm))
  • Driest monthDecember (2.3 in (59 mm))
  • Annual precipitation42 in (1076 mm)
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
  • Records fromGeneral Wayne A Downing Intl A, 20 km away (1943-2026)