Green Bay
Wisconsin, USA
Long term weather forecast
Long term weather forecast

December weather forecast and Climate
Green Bay, WI

  • Average high temperature in December: 28.5°F

Warmest month (with highest average high temperature) is July (79.8°F).
Month with lowest average high temperature is January (24.3°F).

  • Average low temperature in December: 14.4°F

Month with highest average low temperature is July (58.4°F).
Coldest month (with lowest average low temperature) is January (9°F).

  • Average humidity in December: 77.3%

Month with highest relative humidity is December (77.3%).
Month with lowest relative humidity is May (65.9%).

  • Average rainfall in December: 1.5"

Wettest month (with highest rainfall) is June (3.9").
Driest months (with lowest rainfall) are January and February (1.1").

  • Average rainfall days in December: 10.3 days

Month with highest number of rainy days is May (11.4 days).
Month with lowest number of rainy days is February (8.4 days).

  • Average snowfall in December: 13.1"

Month with highest snowfall is December (13.1").
Months with lowest snowfall are June, July, August and September (0").

  • Average snowfall days in December: 9.2 days

Month with highest number of snowfall days is January (9.6 days).
Months with lowest number of snowfall days are June, July, August and September (0 days).

  • Average sea temperature in December: 41°F

Best month for swimming (with highest average sea temperature) is August (68°F).
Coldest month (with lowest average sea temperature) is March (36°F).

  • Average daylight in December: 9h

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

  • Average sunshine in December: 3.6h

Months with most sunshine are June and July (Average sunshine: 10.1h).
Months with least sunshine are November and December (Average sunshine: 3.6).

  • Average UV index in December: 1

Months with highest UV index are June and July (UV index 8).
Months with lowest UV index are January and December (UV index 1).

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