Marlboro vs Alton, Illinois Climate
91%matchMarlboro vs Alton: a 91% climate match. Compared with Marlboro, Alton has less rain in winter.
Marlboro gets 48 in (1214 mm) of rain a year and Alton 40 in (1018 mm). July is the warmest month in both, with highs of 85°F (29°C) in Marlboro 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)
MarlboroAltonsolid = high, dashed = low
Rain (in per month)
MarlboroAlton
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Marlboro | Alton | Marlboro | Alton | Marlboro | Alton | |
| Jan | 40°F(5°C) | 39°F(4°C) | 24°F(-4°C) | 21°F(-6°C) | 3.6 in(91 mm) | 2.1 in(54 mm) |
| Feb | 42°F(6°C) | 44°F(7°C) | 25°F(-4°C) | 25°F(-4°C) | 3.1 in(78 mm) | 2.1 in(54 mm) |
| Mar | 51°F(10°C) | 55°F(13°C) | 32°F(0°C) | 34°F(1°C) | 4.2 in(107 mm) | 3.2 in(82 mm) |
| Apr | 62°F(16°C) | 67°F(19°C) | 41°F(5°C) | 45°F(7°C) | 3.6 in(92 mm) | 3.9 in(99 mm) |
| May | 71°F(22°C) | 76°F(25°C) | 51°F(10°C) | 55°F(13°C) | 3.5 in(90 mm) | 4.8 in(121 mm) |
| Jun | 80°F(27°C) | 84°F(29°C) | 60°F(16°C) | 64°F(18°C) | 4.6 in(116 mm) | 4.0 in(101 mm) |
| Jul | 85°F(29°C) | 88°F(31°C) | 66°F(19°C) | 67°F(20°C) | 4.6 in(117 mm) | 4.1 in(103 mm) |
| Aug | 83°F(28°C) | 87°F(30°C) | 64°F(18°C) | 65°F(19°C) | 4.7 in(119 mm) | 3.4 in(86 mm) |
| Sep | 77°F(25°C) | 80°F(27°C) | 57°F(14°C) | 57°F(14°C) | 4.1 in(105 mm) | 3.6 in(92 mm) |
| Oct | 66°F(19°C) | 69°F(20°C) | 46°F(8°C) | 46°F(8°C) | 4.1 in(103 mm) | 2.9 in(74 mm) |
| Nov | 55°F(13°C) | 55°F(13°C) | 37°F(3°C) | 35°F(2°C) | 3.5 in(90 mm) | 3.3 in(83 mm) |
| Dec | 45°F(7°C) | 43°F(6°C) | 29°F(-2°C) | 26°F(-3°C) | 4.2 in(106 mm) | 2.7 in(69 mm) |
1991–2020 averages, by calendar month.