Windsor, Canada vs O'Fallon, Illinois Climate
82%matchWindsor and O'Fallon are a 82% climate match. Compared with Windsor, O'Fallon has more sun and 5°F (3°C) hotter summer days.
Windsor gets 34 in (872 mm) of rain a year and O'Fallon 40 in (1027 mm). July is the warmest month in both, with highs of 83°F (29°C) in Windsor and 88°F (31°C) in O'Fallon.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
WindsorO'Fallonsolid = high, dashed = low
Rain (in per month)
WindsorO'Fallon
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Windsor | O'Fallon | Windsor | O'Fallon | Windsor | O'Fallon | |
| Jan | 33°F(1°C) | 39°F(4°C) | 20°F(-7°C) | 23°F(-5°C) | 2.1 in(54 mm) | 2.4 in(60 mm) |
| Feb | 36°F(2°C) | 45°F(7°C) | 22°F(-6°C) | 26°F(-3°C) | 2.1 in(53 mm) | 2.4 in(61 mm) |
| Mar | 45°F(7°C) | 56°F(13°C) | 29°F(-2°C) | 35°F(2°C) | 2.5 in(63 mm) | 3.3 in(84 mm) |
| Apr | 58°F(14°C) | 67°F(20°C) | 39°F(4°C) | 45°F(7°C) | 3.2 in(81 mm) | 4.0 in(101 mm) |
| May | 70°F(21°C) | 77°F(25°C) | 50°F(10°C) | 56°F(13°C) | 3.2 in(82 mm) | 4.9 in(124 mm) |
| Jun | 79°F(26°C) | 85°F(30°C) | 60°F(16°C) | 65°F(18°C) | 3.5 in(90 mm) | 4.2 in(106 mm) |
| Jul | 83°F(29°C) | 88°F(31°C) | 64°F(18°C) | 68°F(20°C) | 3.3 in(84 mm) | 3.8 in(96 mm) |
| Aug | 82°F(28°C) | 87°F(31°C) | 63°F(17°C) | 66°F(19°C) | 3.1 in(78 mm) | 3.3 in(83 mm) |
| Sep | 75°F(24°C) | 81°F(27°C) | 56°F(13°C) | 58°F(14°C) | 3.2 in(82 mm) | 3.7 in(94 mm) |
| Oct | 62°F(17°C) | 69°F(21°C) | 45°F(7°C) | 46°F(8°C) | 2.7 in(68 mm) | 2.8 in(72 mm) |
| Nov | 49°F(9°C) | 55°F(13°C) | 35°F(1°C) | 36°F(2°C) | 2.8 in(70 mm) | 3.0 in(77 mm) |
| Dec | 37°F(3°C) | 44°F(7°C) | 26°F(-3°C) | 27°F(-3°C) | 2.6 in(67 mm) | 2.7 in(69 mm) |
1991–2020 averages, by calendar month.