Sioux City weather in May

Check the Weather in Sioux City, Iowa in May before you book your next holiday. This gives the best indication of the weather in May and includes figures for temperature, sunshine and rainfall.

  • 23°C maximum daytime temperature in May in Sioux City23
    23°C max day temperature
  • 9 hours of sunshine per day (60% of daylight hours) in May in Sioux City9
    9 hours of sunshine per day
  • 11 days with some rainfall in May in Sioux City11
    11 days with some rainfall
  • 10°C minimum night-time temperature in May in Sioux City10
    10°C min night temperature
  • 15 hours of daylight per day in May in Sioux City15
    15 hours of daylight per day
  • No heat & humidity in May in Sioux City0
    No heat & humidity
  • 93 mm monthly rainfall in May in Sioux City93
    93 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Sioux City7
    7 (High) UV index

Metric (°C / mm)  |  Imperial (°F / inches)

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