Green Bay vs Thunder Bay: which is sunnier?
🇺🇸 United States vs 🇨🇦 Canada · 442 km apart · long-term climate normals (NASA POWER, 2001–2020)
Green Bay is the sunnier overall: about 2,244 hours of sunshine a year to Thunder Bay's 1,985. Green Bay has the higher Sunshine Score in 4 of 12 months, Thunder Bay in 2 (6 within 2 points).
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Green Bay | Thunder Bay | |
|---|---|---|
| Sunshine hours / year | 2,244 | 1,985 |
| Sunniest month | July (76/100) | August (79/100) |
| Nov–Feb average score | 0/100 | 0/100 |
| Jun–Aug average score | 74/100 | 77/100 |
| Rain / year | 878 mm | 632 mm |
| Peak midday UV | 7 (high) | 6 (high) |
Green Bay vs Thunder Bay month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Green Bay | Thunder Bay | Green Bay | Thunder Bay | Green Bay | Thunder Bay | |
| January | 0 | 0 | -4° | -8° | 34 | 26 |
| February | 0 | 0 | -3° | -7° | 35 | 20 |
| March | 0 | 0 | 4° | 1° | 54 | 30 |
| April | 19 | 7 | 11° | 9° | 86 | 55 |
| May | 55 | 51 | 17° | 16° | 102 | 72 |
| June | 71 | 74 | 23° | 21° | 113 | 86 |
| July | 76 | 77 | 27° | 25° | 89 | 75 |
| August | 76 | 79 | 26° | 24° | 89 | 59 |
| September | 76 | 71 | 22° | 19° | 85 | 70 |
| October | 38 | 13 | 14° | 10° | 87 | 66 |
| November | 0 | 0 | 6° | 3° | 53 | 40 |
| December | 0 | 0 | -1° | -5° | 51 | 33 |
The sunnier month by month: Jan even · Feb even · Mar even · Apr Green Bay · May Green Bay · Jun Thunder Bay · Jul even · Aug Thunder Bay · Sep Green Bay · Oct Green Bay · Nov even · Dec even.
When to pick which
- November–February: too close to call — Green Bay averages 0/100, Thunder Bay 0/100. Green Bay is the warmer, around 0°C daytime highs vs -4°C. See the winter sun ranking.
- March–May: Green Bay (average score 25/100 vs 19). Green Bay is the warmer, around 11°C daytime highs vs 9°C.
- June–August: Thunder Bay (average score 77/100 vs 74). Green Bay is the warmer, around 25°C daytime highs vs 23°C.
- September–October: Green Bay (average score 57/100 vs 42). Green Bay is the warmer, around 18°C daytime highs vs 15°C.
Full month-by-month guides: Green Bay weather by month · Thunder Bay weather by month · Best time to visit United States · Best time to visit Canada.
More comparisons: Green Bay vs Milwaukee · Green Bay vs Madison · Green Bay vs Appleton · Thunder Bay vs Duluth · Thunder Bay vs Sioux Lookout · all head-to-heads