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Clayton (MO) Weather and Climate: A Comprehensive Guide

The temperature in Clayton can vary greatly throughout the year. The temperatures shift from very warm to cold. It also has a notably wet climate with much precipitation. Let's now guide you through the climate details for a complete overview.

Average maximum day and minimum night temperature

Depending on the time of the year, temperatures range from very warm to chilly in Clayton. Average maximum daytime temperatures range from a very warm 32°C in July, the warmest time of the year, to a chilly 5°C during cooler months like January.

At night, temperatures typically drop to an average of around -5°C during these months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Clayton has a relatively rain/snowy climate with high precipitation levels, averaging 1115 mm of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, June receives high rainfall, averaging 128 mm of precipitation, recorded across 11 rainy days. In contrast, the drier season, January brings less snow/rainfall, with 48 mm over 8 snowy/rainy days. For more details, please visit our Clayton Precipitation page.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Seasonal changes in sunshine hours are quite dramatic in Clayton. While July receives considerable daily sunshine with up to 10.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.3 hours of sunlight per day. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: St. Louis, the United States of America (11 KM, 6 Miles).

Daily hours of sunshine

Data from: St. Louis, the United States of America (11 KM, 6 Miles).

Forecast for Clayton (MO)

Sat   Dec 21
3°C | -5°C
W 3 m/s
almost clear and no rain

almost clear and no rain

Sun   Dec 22
7°C | -2°C
SE 6 m/s
clear and no rain

clear and no rain

Mon   Dec 23
10°C | 3°C
SW 5 m/s
0.8 mm
overcast and  chance of rain

overcast and chance of rain

The best time of year to visit Clayton in the United States of America

During the months of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which is the warmest month in Clayton?
    July has an average maximum temperature of 32°C and is the warmest month of the year.
  • Which is the coldest month in Clayton?
    The coldest month is January with an average maximum temperature of 5°C.
  • Which is the wettest month in Clayton?
    June tops the wettest month list with 128 mm of rainfall.
  • Which is the driest month in Clayton?
    January is the driest month with 48 mm of precipitation.
  • Which is the sunniest month in Clayton?
    July is the sunniest month with an average of 311 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.