Markham, Illinois Climate
United States
Pop. 12,682 Elev. 194 m / 637 ft
TZ: America/Chicago (UTC-5) ·
Markham has warm summers with average highs of 85°F (29°C) in July, and frigid winters averaging 16°F (-9°C) in January. Humidity pushes the summer feels-like temperature to 95°F (35°C), while wind chill can drive winter lows to 7°F (-14°C). Rain falls on about 50 days per year (36.3 in / 923 mm total), with snow on 7 days and 38 in (965 mm) of annual accumulation. The city averages 110 sunny days per year and around 39 thunderstorm days. Ocean water temperatures reach 77°F (25°C) in summer.
| Temperature | 85°F (30°C) high | 16°F (-9°C) low |
| Feels like | 95°F (35°C) high | 7°F (-14°C) low |
| Rain | 50 days | 36.3 in (923 mm) /yr |
| Snow | 7 days | 38.0 in (965 mm) /yr |
| Sky | 110 sunny | 39 stormy |
| Wind | 2.7 mph (1.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, Aug, Sep
Sky & Air by Month
Cloud cover (%)
57
Jan 66
Feb 57
Mar 66
Apr 63
May 54
Jun 63
Jul 53
Aug 35
Sep 47
Oct 58
Nov 76
Dec Humidity (%)
61
Jan 65
Feb 60
Mar 61
Apr 67
May 67
Jun 73
Jul 73
Aug 68
Sep 66
Oct 68
Nov 77
Dec Weather Days by Month
Water Temperatures
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Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 14 mi Chicago Midway International Airport (MDW)
Ski resort 23 mi Bunny Hill
National park 8 mi Historic Pullman Foundation Exhibit Hall
Hospital 2 mi Advocate South Suburban Hospital
Hiking trail 5 mi OBT-4
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 31°F -1°C | 16°F -9°C | 0.6 in 16 mm | 6.6 in167 mm | 14 |
| February | 36°F 2°C | 21°F -6°C | 0.2 in 5 mm | 7.4 in189 mm | 4 |
| March | 58°F 15°C | 36°F 2°C | 3.9 in 99 mm | 4.3 in109 mm | 9 |
| April | 61°F 16°C | 43°F 6°C | 3.5 in 90 mm | 0.1 in4 mm | 8 |
| May | 68°F 20°C | 50°F 10°C | 4.4 in 113 mm | — | 7 |
| June | 83°F 28°C | 65°F 18°C | 5.9 in 151 mm | — | 10 |
| July | 85°F 30°C | 70°F 21°C | 5.4 in 136 mm | — | 6 |
| August | 80°F 27°C | 64°F 18°C | 3.5 in 89 mm | — | 9 |
| September | 79°F 26°C | 56°F 14°C | 1.5 in 38 mm | — | 18 |
| October | 67°F 19°C | 49°F 9°C | 4.3 in 109 mm | — | 13 |
| November | 50°F 10°C | 36°F 2°C | 1.2 in 31 mm | 11.5 in293 mm | 9 |
| December | 36°F 2°C | 21°F -6°C | 1.8 in 46 mm | 8.0 in204 mm | 3 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 14 | 1 |
| February | 4 | 0 |
| March | 9 | 6 |
| April | 8 | 2 |
| May | 7 | 5 |
| June | 10 | 5 |
| July | 6 | 8 |
| August | 9 | 5 |
| September | 18 | 3 |
| October | 13 | 3 |
| November | 9 | 0 |
| December | 3 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 36°F 2°C | 32°F 0°C |
| February | 33°F 1°C | 32°F 0°C |
| March | 38°F 4°C | 40°F 4°C |
| April | 47°F 8°C | 49°F 10°C |
| May | 54°F 12°C | 57°F 14°C |
| June | 71°F 22°C | 70°F 21°C |
| July | 76°F 25°C | 78°F 25°C |
| August | 77°F 25°C | 74°F 23°C |
| September | 69°F 21°C | 68°F 20°C |
| October | 66°F 19°C | 59°F 15°C |
| November | 53°F 12°C | 44°F 6°C |
| December | 43°F 6°C | 33°F 1°C |