Clayton, Missouri Climate

United States

Pop. 15,884 Elev. 175 m / 574 ft TZ: America/Chicago (UTC-5) ·

Summers in Clayton are warm, with July highs around 89°F (32°C), while winters are frigid with January lows of 20°F (-7°C). Humidity pushes the summer feels-like temperature to around 106°F (41°C). Expect around 68 rainy days annually (40.3 in / 1024 mm total), with snow on 5 days and 29 in (736 mm) of annual accumulation. The city averages 126 sunny days per year and around 50 thunderstorm days. Nearby lake water reaches 83°F (28°C) in summer.

Temperature 89°F (32°C) high 20°F (-7°C) low
Feels like 106°F (41°C) high 14°F (-10°C) low
Rain 68 days 40.3 in (1024 mm) /yr
Snow 5 days 29.0 in (736 mm) /yr
Sky 126 sunny 50 stormy
Wind 2.1 mph (0.9 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Mar, Aug, Sep, Oct

Sky & Air by Month

Cloud cover (%)
49
Jan
60
Feb
51
Mar
67
Apr
63
May
56
Jun
60
Jul
47
Aug
42
Sep
44
Oct
52
Nov
59
Dec
Humidity (%)
66
Jan
65
Feb
51
Mar
62
Apr
65
May
73
Jun
77
Jul
69
Aug
63
Sep
67
Oct
68
Nov
72
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

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Nearby Cities

Nearby

Commercial airport 8 mi St. Louis Lambert International Airport (STL)
Ski resort 19 mi Hidden Valley
National park 91 mi Emmett Till and Mamie Till-Mobley National Monument
Hospital 1 mi SSM Health St. Mary's Hospital - St. Louis
Hiking trail 2 mi

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 36°F 2°C 20°F -7°C 0.7 in 18 mm 13.4 in341 mm 13
February 43°F 6°C 27°F -3°C 0.8 in 21 mm 7.9 in201 mm 9
March 65°F 19°C 42°F 6°C 3.2 in 81 mm 0.4 in10 mm 13
April 70°F 21°C 50°F 10°C 6.3 in 161 mm 5
May 75°F 24°C 57°F 14°C 5.2 in 131 mm 9
June 85°F 29°C 70°F 21°C 7.7 in 196 mm 9
July 89°F 32°C 74°F 23°C 6.2 in 156 mm 8
August 85°F 29°C 66°F 19°C 1.0 in 25 mm 16
September 84°F 29°C 59°F 15°C 3.3 in 83 mm 12
October 72°F 22°C 53°F 11°C 2.9 in 73 mm 16
November 57°F 14°C 40°F 4°C 2.5 in 63 mm 5.1 in130 mm 10
December 45°F 7°C 29°F -2°C 0.7 in 17 mm 2.1 in54 mm 6

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 13 0
February 9 1
March 13 5
April 5 9
May 9 5
June 9 9
July 8 12
August 16 2
September 12 2
October 16 2
November 10 3
December 6 0

Water Temperatures Data

↑ See chart
Month Lake Avg High
January 33°F 0°C
February 32°F 0°C
March 49°F 9°C
April 58°F 15°C
May 65°F 18°C
June 77°F 25°C
July 83°F 28°C
August 77°F 25°C
September 72°F 22°C
October 62°F 17°C
November 46°F 8°C
December 34°F 1°C