Lu’an vs O'Fallon, Illinois Climate
73%matchLu’an and O'Fallon are a 73% climate match. Compared with Lu’an, O'Fallon has the same summer highs, 8°F (4°C) colder winter nights and more rain in winter.
Lu’an gets 40 in (1023 mm) of rain a year and O'Fallon 40 in (1027 mm). July is the warmest month in both, with highs of 91°F (33°C) in Lu’an 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)
Lu’anO'Fallonsolid = high, dashed = low
Rain (in per month)
Lu’anO'Fallon
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Lu’an | O'Fallon | Lu’an | O'Fallon | Lu’an | O'Fallon | |
| Jan | 46°F(8°C) | 39°F(4°C) | 31°F(-1°C) | 23°F(-5°C) | 1.5 in(38 mm) | 2.4 in(60 mm) |
| Feb | 52°F(11°C) | 45°F(7°C) | 35°F(2°C) | 26°F(-3°C) | 1.9 in(49 mm) | 2.4 in(61 mm) |
| Mar | 61°F(16°C) | 56°F(13°C) | 43°F(6°C) | 35°F(2°C) | 2.9 in(73 mm) | 3.3 in(84 mm) |
| Apr | 72°F(22°C) | 67°F(20°C) | 53°F(12°C) | 45°F(7°C) | 3.6 in(92 mm) | 4.0 in(101 mm) |
| May | 81°F(27°C) | 77°F(25°C) | 62°F(17°C) | 56°F(13°C) | 4.3 in(110 mm) | 4.9 in(124 mm) |
| Jun | 86°F(30°C) | 85°F(30°C) | 70°F(21°C) | 65°F(18°C) | 5.4 in(136 mm) | 4.2 in(106 mm) |
| Jul | 91°F(33°C) | 88°F(31°C) | 76°F(25°C) | 68°F(20°C) | 6.3 in(160 mm) | 3.8 in(96 mm) |
| Aug | 89°F(32°C) | 87°F(31°C) | 75°F(24°C) | 66°F(19°C) | 5.5 in(139 mm) | 3.3 in(83 mm) |
| Sep | 82°F(28°C) | 81°F(27°C) | 67°F(19°C) | 58°F(14°C) | 3.0 in(75 mm) | 3.7 in(94 mm) |
| Oct | 73°F(23°C) | 69°F(21°C) | 55°F(13°C) | 46°F(8°C) | 2.6 in(65 mm) | 2.8 in(72 mm) |
| Nov | 61°F(16°C) | 55°F(13°C) | 43°F(6°C) | 36°F(2°C) | 2.3 in(58 mm) | 3.0 in(77 mm) |
| Dec | 50°F(10°C) | 44°F(7°C) | 33°F(1°C) | 27°F(-3°C) | 1.1 in(28 mm) | 2.7 in(69 mm) |
1991–2020 averages, by calendar month.