Clayton (MO) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Clayton.
Climate overview of Clayton
Clayton, Missouri, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 32°C (90°F) in July, while winters cool to 5°C (41°F) in January.
Rain/snowfall is high, totalling around 1115 mm (44 in) per year. June is the wettest month and January the driest. The city also experiences very warm summers and cold winters. The most sunshine falls in July, with an average of 10.4 hours of daily sunshine.
Clayton Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Clayton - and find the best time to visit.
Monthly Temperature in Clayton
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 (90°F) in July, the warmest time of the year, to a chilly 5°C (41°F) during cooler months like January.
At night, you can expect temperatures ranging from 21°C (70°F) in July to around -5°C (23°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Clayton
Clayton has a relatively rain/snowy climate with high precipitation levels, averaging 1115 mm (44 in) of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, June it receives high rainfall, averaging 128 mm (5 in) of precipitation, recorded across 11 rainy days. In contrast, the driest month January brings less snow/rainfall, with 48 mm (1.9 in) 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
The average number of days each month with precipitation
Sunshine Hours in Clayton
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
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Clayton by Month
The relative humidity is high throughout the year in Clayton.
The city experiences its highest humidity in December, reaching 74%. In April, the humidity drops to its lowest level at 63%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Clayton
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: October
- Warmest weather: June, July and August
- Most sunshine: July
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Clayton
What is the best time to visit Clayton?
October typically offers the most optimal weather in Clayton. In contrast, January, February and December tend to have less optimal conditions. Clayton has very warm summers and cold winters.
What temperatures can I expect in Clayton?
Daytime highs range from 5°C (41°F) in January to 32°C (90°F) in July. Nighttime lows range from -5°C (23°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does Clayton get?
Annual rainfall is around 1115 mm (44 in). June is the wettest month with 128 mm (5 in), while January is the driest with 48 mm (1.9 in).
How sunny is Clayton?
Clayton receives around 2,594 hours of sunshine per year. July is the sunniest month with 311 hours, while December is the cloudiest with just 128 hours. Overall, Clayton enjoys abundant sunshine.
Clayton 3-Day Forecast
Clayton (MO) 3-Day Forecast
Clayton on the map
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