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

May weather forecast and Climate
Green Bay, WI

An aerial panorama of the sun setting over Green Bay in Wisconsin, USA
An aerial panorama of the sun setting over Green Bay in Wisconsin, USA
  • The average high temperature in May: 18.9°C

The warmest month (with the highest average high temperature) is July (26.6°C).
The month with the lowest average high temperature is January (-4.3°C).

  • The average low temperature in May: 6.7°C

The month with the highest average low temperature is July (14.7°C).
The coldest month (with the lowest average low temperature) is January (-12.8°C).

  • The average humidity in May: 65.9%

The month with the highest relative humidity is December (77.3%).
The month with the lowest relative humidity is May (65.9%).

  • The average rainfall in May: 74.4mm

The wettest month (with the highest rainfall) is June (98.6mm).
The driest month (with the lowest rainfall) is February (28.2mm).

  • The average rainfall days in May: 11.4 days

The month with the highest number of rainy days is May (11.4 days).
The month with the lowest number of rainy days is February (8.4 days).

  • The average snowfall in May: 5.1mm

The month with the highest snowfall is December (332.7mm).
Months with the lowest snowfall are June, July, August and September (0mm).

  • The average snowfall days in May: 0.1 days

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

  • The average sea temperature in May: 4°C

The best month for swimming (with the highest average sea temperature) is August (20°C).
The coldest month (with the lowest average sea temperature) is March (2°C).

  • The average daylight in May: 15h

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

  • The average sunshine in May: 9.2h

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

  • The average UV index in May: 7

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

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