Green Bay, WI Weather by Month and Climate Averages

How much rain does Green Bay get?

Green Bay gets 32.4 in of precipitation in an average year, spread over about 98 days with measurable rain. That is more rainy days than 59% of the US.

June is the wettest month, with 4.2 in. February is the driest, with 1.1 in. June has the most rainy days, about 11.

The longest dry spell in the last five years lasted 14 days, to March 3, 2025.

See where Green Bay ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Wisconsin.

Does it snow in Green Bay?

The snowiest winter on record is 2010–11, with 92.7 in.

The most recent measurable snow at the station fell on March 18, 2026.

See where Green Bay ranks: snowiest cities in the US.

Green Bay weather by month

Green Bay weather in January

In January, Green Bay averages a high of 26°F and a low of 10°F. It gets 1.3 in of precipitation over about 6 rainy days. The sun is out about 25% of daylight hours. The January record high is 53°F (2025) and the record low is -26°F (2019).

Green Bay weather in February

In February, Green Bay averages a high of 29°F and a low of 10°F. It gets 1.1 in of precipitation over about 6 rainy days. The sun is out about 41% of daylight hours. The February record high is 69°F (2024) and the record low is -26°F (2019).

Green Bay weather in March

In March, Green Bay averages a high of 41°F and a low of 22°F. It gets 1.9 in of precipitation over about 7 rainy days. The sun is out about 34% of daylight hours. The March record high is 83°F (2012) and the record low is -23°F (2014).

Green Bay weather in April

In April, Green Bay averages a high of 54°F and a low of 33°F. It gets 3.1 in of precipitation over about 9 rainy days. The sun is out about 37% of daylight hours. The April record high is 86°F (2023) and the record low is 10°F (2018).

Green Bay weather in May

In May, Green Bay averages a high of 67°F and a low of 44°F. It gets 3.6 in of precipitation over about 11 rainy days. The sun is out about 40% of daylight hours. The May record high is 97°F (2018) and the record low is 24°F (2004). May is one of the most comfortable months to visit.

Green Bay weather in June

In June, Green Bay averages a high of 76°F and a low of 55°F. It gets 4.2 in of precipitation over about 11 rainy days. The sun is out about 51% of daylight hours. The June record high is 95°F (2011) and the record low is 36°F (2003).

Green Bay weather in July

In July, Green Bay averages a high of 81°F and a low of 59°F. It gets 3.7 in of precipitation over about 10 rainy days. The sun is out about 52% of daylight hours. The July record high is 97°F (2006) and the record low is 40°F (2007).

Green Bay weather in August

In August, Green Bay averages a high of 79°F and a low of 58°F. It gets 3.4 in of precipitation over about 8 rainy days. The sun is out about 51% of daylight hours. The August record high is 99°F (2001) and the record low is 40°F (2023). August is one of the most comfortable months to visit.

Green Bay weather in September

In September, Green Bay averages a high of 72°F and a low of 50°F. It gets 3.4 in of precipitation over about 8 rainy days. The sun is out about 51% of daylight hours. The September record high is 94°F (2000) and the record low is 32°F (2003). September is one of the most comfortable months to visit.

Green Bay weather in October

In October, Green Bay averages a high of 59°F and a low of 39°F. It gets 2.8 in of precipitation over about 8 rainy days. The sun is out about 45% of daylight hours. The October record high is 86°F (2023) and the record low is 22°F (2006).

Green Bay weather in November

In November, Green Bay averages a high of 45°F and a low of 28°F. It gets 2.0 in of precipitation over about 6 rainy days. The sun is out about 41% of daylight hours. The November record high is 75°F (2020) and the record low is 1°F (2014).

Green Bay weather in December

In December, Green Bay averages a high of 32°F and a low of 17°F. It gets 1.8 in of precipitation over about 7 rainy days. The sun is out about 29% of daylight hours. The December record high is 64°F (2021) and the record low is -21°F (2000).

Sunshine, humidity and wind in Green Bay

July is the sunniest month in Green Bay, with sunshine about 52% of daylight hours. January is the cloudiest, at 25%. Over the year the sun shines about 41% of daylight hours. Green Bay is cloudier than 84% of the US.

Humidity peaks in January at 76% and is lowest in May at 60%.

Green Bay has about 6 days a year above 90°F. Green Bay is cooler than 87% of the US.

Thunderstorms occur on about 4 days a year.

See where Green Bay ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.

First and last freeze in Green Bay

The first fall freeze in Green Bay typically comes around October 13, and the last spring freeze around May 9. That leaves a frost-free growing season of about 157 days.

Green Bay weather records

The hottest temperature on record at the Green Bay station is 99°F, on August 8, 2001. The coldest is -26°F, on January 30, 2019.

The wettest day on record brought 4.5 in of rain, on July 8, 2000.

The best time to visit Green Bay

The most comfortable time to visit is typically May and August to September, when daytime highs sit near 73°F.

Winter (December–February) is cold, with average highs around 29°F and lows near 12°F. Snow is possible.

Spring (March–May) is chilly, with average highs around 54°F and lows near 33°F.

Summer (June–August) is warm, with average highs around 79°F and lows near 57°F.

Autumn (September–November) is mild, with average highs around 59°F and lows near 39°F.

Green Bay climate questions

How much rain does Green Bay get?

Green Bay gets 32.4 in of precipitation in an average year, over about 98 rainy days.

What is the wettest month in Green Bay?

June is the wettest month in Green Bay, with 4.2 in. February is the driest, with 1.1 in.

How many rainy days does Green Bay have a year?

Green Bay has about 98 days with measurable rain in an average year. June has the most, about 11.

What is the hottest month in Green Bay?

July is the warmest month in Green Bay, with an average high of 81°F.

What is the coldest month in Green Bay?

January is the coldest month in Green Bay, with an average low of 10°F.

What is the record high temperature in Green Bay?

The record high at the Green Bay station is 99°F, set on August 8, 2001. The record low is -26°F, on January 30, 2019.

What is the sunniest month in Green Bay?

July is the sunniest month in Green Bay, with sunshine about 52% of daylight hours. January is the cloudiest.

When is the first frost in Green Bay?

The first fall freeze in Green Bay typically comes around October 13. The last spring freeze is around May 9.

What is the best time to visit Green Bay?

The most comfortable time to visit is typically May and August to September, when daytime highs sit near 73°F.