Zion, Illinois Climate
United States
Pop. 24,117 Elev. 201 m / 659 ft
TZ: America/Chicago (UTC-5) ·
Zion is largely arid, with warm summers peaking at 74°F (23°C) in July and cold winters around 21°F (-6°C) in January. Wind chill can push winter lows to 10°F (-12°C). Precipitation occurs on roughly 42 days per year (26.8 in / 681 mm total), with snow on 7 days and 45 in (1133 mm) of annual accumulation. The city averages 115 sunny days per year and around 20 thunderstorm days. Ocean water temperatures reach 74°F (23°C) in summer.
| Temperature | 74°F (23°C) high | 21°F (-6°C) low |
| Feels like | 10°F (-12°C) low | |
| Rain | 42 days | 26.8 in (681 mm) /yr |
| Snow | 7 days | 44.6 in (1133 mm) /yr |
| Sky | 115 sunny | 20 stormy |
| Wind | 4.2 mph (1.9 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
63
Jan 72
Feb 61
Mar 64
Apr 62
May 54
Jun 57
Jul 43
Aug 32
Sep 44
Oct 60
Nov 85
Dec Humidity (%)
65
Jan 71
Feb 74
Mar 80
Apr 87
May 86
Jun 87
Jul 77
Aug 79
Sep 72
Oct 70
Nov 77
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 33 mi Chicago O'Hare International Airport (ORD)
Ski resort 22 mi
National park 53 mi Pullman National Historical Park
Hospital 0 mi Cancer Treatment Centers of America at Midwestern Regional Medical Center
Hiking trail 2 mi Marsh Trails
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 31°F -1°C | 21°F -6°C | 0.3 in 8 mm | 5.1 in130 mm | 6 |
| February | 32°F 0°C | 23°F -5°C | 0.4 in 10 mm | 10.7 in272 mm | 4 |
| March | 44°F 6°C | 34°F 1°C | 3.5 in 90 mm | 5.5 in138 mm | 7 |
| April | 46°F 8°C | 39°F 4°C | 2.5 in 64 mm | 0.3 in7 mm | 6 |
| May | 50°F 10°C | 45°F 7°C | 3.9 in 99 mm | — | 9 |
| June | 65°F 19°C | 59°F 15°C | 3.7 in 93 mm | — | 10 |
| July | 74°F 23°C | 68°F 20°C | 3.0 in 75 mm | — | 10 |
| August | 73°F 23°C | 68°F 20°C | 1.9 in 49 mm | — | 19 |
| September | 69°F 21°C | 64°F 18°C | 1.1 in 29 mm | — | 18 |
| October | 61°F 16°C | 56°F 13°C | 2.4 in 60 mm | — | 16 |
| November | 48°F 9°C | 41°F 5°C | 1.5 in 38 mm | 14.2 in360 mm | 9 |
| December | 35°F 2°C | 26°F -3°C | 2.6 in 65 mm | 8.8 in225 mm | 1 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 6 | 0 |
| February | 4 | 0 |
| March | 7 | 3 |
| April | 6 | 1 |
| May | 9 | 2 |
| June | 10 | 2 |
| July | 10 | 4 |
| August | 19 | 3 |
| September | 18 | 1 |
| October | 16 | 2 |
| November | 9 | 1 |
| December | 1 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 38°F 3°C | 35°F 2°C |
| February | 34°F 1°C | 33°F 1°C |
| March | 37°F 3°C | 35°F 2°C |
| April | 42°F 6°C | 39°F 4°C |
| May | 48°F 9°C | 45°F 7°C |
| June | 66°F 19°C | 59°F 15°C |
| July | 74°F 23°C | 72°F 22°C |
| August | 74°F 23°C | 74°F 23°C |
| September | 69°F 20°C | 69°F 20°C |
| October | 67°F 19°C | 61°F 16°C |
| November | 52°F 11°C | 48°F 9°C |
| December | 43°F 6°C | 39°F 4°C |