Marion, Illinois Climate
United States
Pop. 17,803 Elev. 128 m / 420 ft
TZ: America/Chicago (UTC-5) ·
Marion sees warm summers peaking at 89°F (32°C) in July, and cold winters that bottom out around 25°F (-4°C) in January. Humidity pushes the summer feels-like temperature to around 107°F (42°C). Precipitation occurs on roughly 65 days per year (44.5 in / 1131 mm total), with snow on 4 days and 20 in (516 mm) of annual accumulation. The city averages 141 sunny days per year and around 49 thunderstorm days. Nearby lake water reaches 83°F (29°C) in summer.
| Temperature | 89°F (32°C) high | 25°F (-4°C) low |
| Feels like | 107°F (42°C) high | 21°F (-6°C) low |
| Rain | 65 days | 44.5 in (1131 mm) /yr |
| Snow | 4 days | 20.3 in (516 mm) /yr |
| Sky | 141 sunny | 49 stormy |
| Wind | 2.4 mph (1.1 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Mar, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
47
Jan 61
Feb 51
Mar 62
Apr 66
May 54
Jun 52
Jul 40
Aug 38
Sep 40
Oct 55
Nov 58
Dec Humidity (%)
61
Jan 68
Feb 50
Mar 62
Apr 68
May 72
Jun 76
Jul 66
Aug 61
Sep 67
Oct 67
Nov 69
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 5 mi Veterans Airport of Southern Illinois (MWA)
Ski resort 109 mi Hidden Valley
National park 8 mi Emmett Till and Mamie Till-Mobley National Monument
Mountain peak
(5,125 ft) 319 mi Little Haw Knob
Hospital 1 mi Marion VA Medical Center
Hiking trail 5 mi Crab Orchard Visitor Center Pond and Woodland Nature Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 39°F 4°C | 25°F -4°C | 2.9 in 74 mm | 7.2 in183 mm | 15 |
| February | 46°F 8°C | 29°F -2°C | 3.4 in 87 mm | 9.6 in244 mm | 7 |
| March | 67°F 19°C | 44°F 7°C | 2.9 in 72 mm | 0.1 in4 mm | 12 |
| April | 72°F 22°C | 52°F 11°C | 8.2 in 208 mm | — | 7 |
| May | 74°F 24°C | 59°F 15°C | 6.8 in 172 mm | — | 8 |
| June | 86°F 30°C | 71°F 22°C | 5.8 in 146 mm | — | 9 |
| July | 89°F 32°C | 75°F 24°C | 4.3 in 108 mm | — | 12 |
| August | 86°F 30°C | 67°F 20°C | 0.3 in 8 mm | — | 17 |
| September | 85°F 29°C | 61°F 16°C | 2.0 in 52 mm | — | 15 |
| October | 73°F 23°C | 53°F 11°C | 4.2 in 107 mm | — | 18 |
| November | 60°F 15°C | 42°F 5°C | 2.8 in 70 mm | 1.0 in26 mm | 10 |
| December | 48°F 9°C | 33°F 1°C | 1.0 in 26 mm | 2.3 in59 mm | 11 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 15 | 1 |
| February | 7 | 3 |
| March | 12 | 3 |
| April | 7 | 8 |
| May | 8 | 8 |
| June | 9 | 8 |
| July | 12 | 9 |
| August | 17 | 0 |
| September | 15 | 1 |
| October | 18 | 4 |
| November | 10 | 3 |
| December | 11 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 34°F 1°C |
| February | 34°F 1°C |
| March | 48°F 9°C |
| April | 59°F 15°C |
| May | 66°F 19°C |
| June | 77°F 25°C |
| July | 83°F 29°C |
| August | 79°F 26°C |
| September | 72°F 22°C |
| October | 64°F 18°C |
| November | 49°F 9°C |
| December | 36°F 2°C |