Green Bay weather by month & the best time to visit
United States · regional city · hot-summer continental climate
The best time to visit Green Bay is July — its sunniest month (Sunshine Score 76/100), with August and September close behind. Green Bay averages about 2,244 hours of sunshine a year. Daytime highs around 27°C / 81°F and roughly 89 mm of rain in July.
When is the best time to visit Green Bay?
For sunshine, the best time to visit Green Bay is July, then August and September. The dullest month is January (0/100, 34 mm of rain). The full month-by-month picture is in the table below.
How sunny is Green Bay?
Green Bay gets a moderate 2,244 hours of sunshine a year. 76 Sunshine Score points separate July (76) from January (0), so the month you pick matters. It ranks #306 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. The year's 878 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | -4° / 25°F | -12° / 10°F | 34 mm | 1 |
| February | 0 | -3° / 27°F | -11° / 12°F | 35 mm | 2 |
| March | 0 | 4° / 39°F | -5° / 23°F | 54 mm | 3 |
| April | 19 | 11° / 52°F | 1° / 34°F | 86 mm | 4 |
| May | 55 | 17° / 63°F | 7° / 45°F | 102 mm | 6 |
| June | 71 | 23° / 73°F | 13° / 55°F | 113 mm | 7 |
| July | 76 | 27° / 81°F | 17° / 63°F | 89 mm | 7 |
| August | 76 | 26° / 79°F | 16° / 61°F | 89 mm | 6 |
| September | 76 | 22° / 72°F | 12° / 54°F | 85 mm | 5 |
| October | 38 | 14° / 57°F | 5° / 41°F | 87 mm | 3 |
| November | 0 | 6° / 43°F | -1° / 30°F | 53 mm | 1 |
| December | 0 | -1° / 30°F | -8° / 18°F | 51 mm | 1 |
Nearest destinations
Head-to-head
How Green Bay compares month by month: Green Bay vs Milwaukee · Green Bay vs Madison · Green Bay vs Thunder Bay · Green Bay vs Appleton · all comparisons
Green Bay: questions and answers
What kind of destination is Green Bay?
Green Bay is a regional city in United States with a hot-summer continental climate.
How many hours of sunshine does Green Bay get a year?
Green Bay gets about 2,244 hours of sunshine a year, at its best around July.
When is the best time to visit Green Bay?
The sunniest time to visit Green Bay is July, when the Sunshine Score peaks at 76/100 (with August and September close behind). Expect daytime highs around 27°C / 81°F.
What is the least sunny month in Green Bay?
January is the least sunny month in Green Bay, scoring 0/100 with about 34 mm of rain.
How strong is the sun in Green Bay?
The typical midday UV index in Green Bay peaks around 7 (high) in June, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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