Thunder Bay vs Sioux Lookout: which is sunnier?
🇨🇦 Canada vs 🇨🇦 Canada · 269 km apart · long-term climate normals (NASA POWER, 2001–2020)
Sioux Lookout is the sunnier overall: about 2,060 hours of sunshine a year to Thunder Bay's 1,985. Thunder Bay has the higher Sunshine Score in 7 of 12 months; the other 5 are within 2 points.
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Thunder Bay | Sioux Lookout | |
|---|---|---|
| Sunshine hours / year | 1,985 | 2,060 |
| Sunniest month | August (79/100) | August (76/100) |
| Nov–Feb average score | 0/100 | 0/100 |
| Jun–Aug average score | 77/100 | 72/100 |
| Rain / year | 632 mm | 815 mm |
| Peak midday UV | 6 (high) | 6 (high) |
Thunder Bay vs Sioux Lookout month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Thunder Bay | Sioux Lookout | Thunder Bay | Sioux Lookout | Thunder Bay | Sioux Lookout | |
| January | 0 | 0 | -8° | -13° | 26 | 33 |
| February | 0 | 0 | -7° | -11° | 20 | 28 |
| March | 0 | 0 | 1° | -2° | 30 | 40 |
| April | 7 | 0 | 9° | 7° | 55 | 49 |
| May | 51 | 48 | 16° | 16° | 72 | 101 |
| June | 74 | 69 | 21° | 21° | 86 | 117 |
| July | 77 | 71 | 25° | 24° | 75 | 109 |
| August | 79 | 76 | 24° | 23° | 59 | 83 |
| September | 71 | 55 | 19° | 17° | 70 | 97 |
| October | 13 | 0 | 10° | 8° | 66 | 74 |
| November | 0 | 0 | 3° | -1° | 40 | 47 |
| December | 0 | 0 | -5° | -10° | 33 | 37 |
The sunnier month by month: Jan even · Feb even · Mar even · Apr Thunder Bay · May Thunder Bay · Jun Thunder Bay · Jul Thunder Bay · Aug Thunder Bay · Sep Thunder Bay · Oct Thunder Bay · Nov even · Dec even.
When to pick which
- November–February: too close to call — Thunder Bay averages 0/100, Sioux Lookout 0/100. Thunder Bay is the warmer, around -4°C daytime highs vs -9°C. See the winter sun ranking.
- March–May: Thunder Bay (average score 19/100 vs 16). Thunder Bay is the warmer, around 9°C daytime highs vs 7°C.
- June–August: Thunder Bay (average score 77/100 vs 72). Daytime highs are similar (23°C vs 23°C).
- September–October: Thunder Bay (average score 42/100 vs 28). Thunder Bay is the warmer, around 15°C daytime highs vs 13°C.
Full month-by-month guides: Thunder Bay weather by month · Sioux Lookout weather by month · Best time to visit Canada.
More comparisons: Thunder Bay vs Green Bay · Thunder Bay vs Duluth · Sioux Lookout vs Winnipeg · Sioux Lookout vs Duluth · all head-to-heads