Thunder Bay vs Duluth, Minnesota Climate
81%matchThunder Bay vs Duluth: a 81% climate match. Compared with Thunder Bay, Duluth has the same summer highs and 5°F (3°C) milder winter nights.
Thunder Bay gets 28 in (718 mm) of rain a year and Duluth 29 in (747 mm). July is the warmest month in both, with highs of 78°F (26°C) in Thunder Bay and 79°F (26°C) in Duluth.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
Thunder BayDuluthsolid = high, dashed = low
Rain (in per month)
Thunder BayDuluth
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Thunder Bay | Duluth | Thunder Bay | Duluth | Thunder Bay | Duluth | |
| Jan | 19°F(-7°C) | 22°F(-6°C) | -1°F(-18°C) | 4°F(-16°C) | 1.3 in(33 mm) | 0.8 in(21 mm) |
| Feb | 23°F(-5°C) | 26°F(-3°C) | 0°F(-18°C) | 7°F(-14°C) | 1.0 in(26 mm) | 0.8 in(21 mm) |
| Mar | 35°F(1°C) | 37°F(3°C) | 13°F(-11°C) | 19°F(-7°C) | 1.5 in(37 mm) | 1.4 in(36 mm) |
| Apr | 48°F(9°C) | 49°F(9°C) | 26°F(-3°C) | 33°F(0°C) | 2.2 in(55 mm) | 2.4 in(62 mm) |
| May | 62°F(17°C) | 63°F(17°C) | 39°F(4°C) | 43°F(6°C) | 3.1 in(80 mm) | 3.3 in(84 mm) |
| Jun | 72°F(22°C) | 73°F(23°C) | 48°F(9°C) | 52°F(11°C) | 3.1 in(79 mm) | 3.9 in(100 mm) |
| Jul | 78°F(26°C) | 79°F(26°C) | 54°F(12°C) | 58°F(15°C) | 3.6 in(91 mm) | 3.8 in(97 mm) |
| Aug | 76°F(25°C) | 77°F(25°C) | 53°F(12°C) | 58°F(15°C) | 3.0 in(77 mm) | 3.9 in(100 mm) |
| Sep | 66°F(19°C) | 69°F(21°C) | 45°F(7°C) | 50°F(10°C) | 3.1 in(80 mm) | 3.2 in(81 mm) |
| Oct | 52°F(11°C) | 55°F(13°C) | 35°F(2°C) | 38°F(3°C) | 2.6 in(67 mm) | 2.7 in(69 mm) |
| Nov | 37°F(3°C) | 40°F(4°C) | 22°F(-6°C) | 26°F(-3°C) | 2.0 in(50 mm) | 1.7 in(44 mm) |
| Dec | 24°F(-4°C) | 27°F(-3°C) | 7°F(-14°C) | 12°F(-11°C) | 1.7 in(43 mm) | 1.3 in(32 mm) |
1991–2020 averages, by calendar month.