Springfield, Illinois vs Alton, Illinois Climate
99%matchSpringfield and Alton are a 99% climate match. Very close: temperatures within 2°F (1°C), with similar rain, humidity and sun.
Springfield gets 37 in (946 mm) of rain a year and Alton 40 in (1018 mm). July is the warmest month in both, with highs of 88°F (31°C) in Springfield and 88°F (31°C) in Alton.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
SpringfieldAltonsolid = high, dashed = low
Rain (in per month)
SpringfieldAlton
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Springfield | Alton | Springfield | Alton | Springfield | Alton | |
| Jan | 37°F(3°C) | 39°F(4°C) | 20°F(-7°C) | 21°F(-6°C) | 1.8 in(46 mm) | 2.1 in(54 mm) |
| Feb | 42°F(5°C) | 44°F(7°C) | 23°F(-5°C) | 25°F(-4°C) | 1.8 in(45 mm) | 2.1 in(54 mm) |
| Mar | 54°F(12°C) | 55°F(13°C) | 34°F(1°C) | 34°F(1°C) | 2.8 in(71 mm) | 3.2 in(82 mm) |
| Apr | 66°F(19°C) | 67°F(19°C) | 43°F(6°C) | 45°F(7°C) | 4.0 in(101 mm) | 3.9 in(99 mm) |
| May | 76°F(25°C) | 76°F(25°C) | 54°F(12°C) | 55°F(13°C) | 4.6 in(116 mm) | 4.8 in(121 mm) |
| Jun | 85°F(30°C) | 84°F(29°C) | 63°F(17°C) | 64°F(18°C) | 4.5 in(115 mm) | 4.0 in(101 mm) |
| Jul | 88°F(31°C) | 88°F(31°C) | 67°F(19°C) | 67°F(20°C) | 3.6 in(91 mm) | 4.1 in(103 mm) |
| Aug | 87°F(31°C) | 87°F(30°C) | 65°F(18°C) | 65°F(19°C) | 3.1 in(79 mm) | 3.4 in(86 mm) |
| Sep | 81°F(27°C) | 80°F(27°C) | 56°F(13°C) | 57°F(14°C) | 3.2 in(81 mm) | 3.6 in(92 mm) |
| Oct | 68°F(20°C) | 69°F(20°C) | 45°F(7°C) | 46°F(8°C) | 2.8 in(70 mm) | 2.9 in(74 mm) |
| Nov | 53°F(12°C) | 55°F(13°C) | 34°F(1°C) | 35°F(2°C) | 2.7 in(69 mm) | 3.3 in(83 mm) |
| Dec | 41°F(5°C) | 43°F(6°C) | 25°F(-4°C) | 26°F(-3°C) | 2.4 in(62 mm) | 2.7 in(69 mm) |
1991–2020 averages, by calendar month.