Galena
Illinois, USA
Long term weather forecast
Long term weather forecast

May weather forecast and Climate
Galena, IL

  • Average high temperature in May: 70°F

Warmest month (with highest average high temperature) is July (83°F).
Month with lowest average high temperature is January (28°F).

  • Average low temperature in May: 46°F

Month with highest average low temperature is July (60°F).
Coldest month (with lowest average low temperature) is January (10°F).

  • Average rainfall in May: 3.9"

Wettest month (with highest rainfall) is June (5").
Driest month (with lowest rainfall) is January (1.1").

  • Average rainfall days in May: 11 days

Month with highest number of rainy days is April (12 days).
Month with lowest number of rainy days is February (8 days).

  • Average daylight in May: 15h

Months with longest days are May, June and July (Average daylight: 15).
Months with shortest days are January and December (Average daylight: 9).

  • Average sunshine in May: 10h

Months with most sunshine are May, June, July and August (Average sunshine: 10).
Months with least sunshine are November and December (Average sunshine: 4).

  • Average UV index in May: 7

Months with highest UV index are June and July (UV index 9).
Months with lowest UV index are January and December (UV index 1).

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