Climate almanac

Saint Charles

Missouri, US · 38.78°, -90.48°

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What is the climate like in Saint Charles?

Saint Charles is warmest in July, when daily highs average 88°F (31°C), and coolest in January, when lows fall to about 26°F (-3°C). The wettest month is typically May and the driest is December; the year sees roughly 44 in of precipitation.

  • Warmest monthJuly — average high 88°F (31°C)
  • Coolest monthJanuary — average low 26°F (-3°C)
  • Wettest monthMay (5.1 in)
  • Driest monthDecember (2.3 in)
  • Annual precipitation44 in