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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Clayton, Missouri, is an icy winter month, with an average temperature varying between 37.8°F (3.2°C) and 24.3°F (-4.3°C). January brings the lowest temperatures, with an average high of 37.8°F (3.2°C) and an average low of 24.3°F (-4.3°C). Weather in January »
Weather in February
February, the last month of the winter in Clayton, is also a wintry month, with an average temperature varying between 42.3°F (5.7°C) and 27.9°F (-2.3°C). The arrival of February denotes a barely perceptible change in the average high-temperatures to a still wintry 42.3°F (5.7°C) from January's 37.8°F (3.2°C). Weather in February »
Weather in March
March, the first month of the spring in Clayton, is a fresh month, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 38.1°F (3.4°C). The commencement of March sees a shift in the average high-temperature, moving from a wintry 42.3°F (5.7°C) in February to a fresh 54.3°F (12.4°C). Weather in March »
Weather in April
April in Clayton, Missouri, is an enjoyable spring month, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 65.5°F (18.6°C). Clayton in April experiences an increase in the average high-temperature, moving from March's cool 54.3°F (12.4°C) to a refreshing 65.5°F (18.6°C). Weather in April »
Weather in May
May, the last month of the spring in Clayton, is a moderately hot month, with an average temperature varying between 57.7°F (14.3°C) and 74.8°F (23.8°C). The shift into May brings an increase in the average high-temperature, moving from an enjoyable 65.5°F (18.6°C) in April to a moderately hot 74.8°F (23.8°C). Weather in May »
Weather in June
June, the first month of the summer in Clayton, is still a warm month, with temperature in the range of an average low of 67.1°F (19.5°C) and an average high of 84.2°F (29°C). June's arrival signals an increase in average high-temperatures, moving from May's warm 74.8°F (23.8°C) to a still moderately hot 84.2°F (29°C). Weather in June »
Weather in July
July is a tropical summer month in Clayton, Missouri, with an average temperature varying between 69.1°F (20.6°C) and 86.9°F (30.5°C). The highest temperatures are recorded in July, with averages reaching a high of 86.9°F (30.5°C) and a low of 69.1°F (20.6°C). For July, the heat index is computed to be a sweltering 100.4°F (38°C). Weather in July »
Weather in August
August, the last month of the summer in Clayton, is another warm month, with temperature in the range of an average high of 85.5°F (29.7°C) and an average low of 67.1°F (19.5°C). Clayton's average high-temperature in August sits at a moderately hot 85.5°F (29.7°C), showing little difference from the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Clayton, Missouri, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 60.1°F (15.6°C). With September's onset, the weather reveals a slight temperature decrease, transitioning from a moderately hot 85.5°F (29.7°C) in August to a still warm 79.7°F (26.5°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Clayton, Missouri, with an average temperature varying between 49.5°F (9.7°C) and 66.4°F (19.1°C). Clayton's weather in October involves a decrease in the average high-temperature, moving down from September's warm 79.7°F (26.5°C) to an enjoyable 66.4°F (19.1°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Clayton, Missouri, with an average temperature fluctuating between 38.1°F (3.4°C) and 53.4°F (11.9°C). During the transition into November, Clayton observes a decrease in the average high-temperature, falling from an enjoyable 66.4°F (19.1°C) in October to a fresh 53.4°F (11.9°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Clayton, Missouri, with an average temperature fluctuating between 42.6°F (5.9°C) and 30.6°F (-0.8°C). December's arrival correlates with a reduction in the average high-temperature, down from a fresh 53.4°F (11.9°C) in November to a wintry 42.6°F (5.9°C). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Clayton?
January is Clayton's coldest month, registering average high temperatures of 37.8°F (3.2°C) and lows of 24.3°F (-4.3°C).
How many days does it rain in Clayton?
Throughout the year, in Clayton, Missouri, there are 144.8 rainfall days, and 30.59" (777mm) of precipitation is accumulated.
When does it snow in Clayton?
Months with snowfall are January through March, November and December.
How much does it snow in Clayton?
Throughout the year, there are 16.2 snowfall days, and 8.19" (208mm) of snow is accumulated.
What is the month with the least sunshine in Clayton?
January has the least sunshine of the year in Clayton, with an average of 4.6h of sunshine.
What are the months with the lowest UV index in Clayton?
The months with the lowest UV index in Clayton are January, February and December, with an average maximum UV index of 2.
What is the driest month in Clayton?
February is the month with the least rainfall in Clayton, Missouri. Rain falls for 7.6 days and accumulates 1.69" (43mm) of precipitation.
What is the snowiest month in Clayton?
February is the month with the most snowfall in Clayton. Snow falls for 5.2 days and accumulates 2.6" (66mm) of snow.
When is Daylight Saving Time (DST) in Clayton?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Clayton, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
When it does not snow in Clayton?
April through October are months without snowfall in Clayton.
What is the most humid month in Clayton?
With an average relative humidity of 78%, May is the most humid month.
What is the rainiest month in Clayton?
May is the month with the most rainfall in Clayton. Rain falls for 16.9 days and accumulates 3.58" (91mm) of precipitation.
What are the months with the highest UV index in Clayton?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days in Clayton?
With an average of 14h and 48min of daylight, June has the longest days of the year in Clayton, Missouri.
What is the month with the most sunshine in Clayton?
June and July, with an average of 10.5h of sunshine, are months with the most sunshine in Clayton, Missouri.
What time of the year is the hottest in Clayton?
July, with an average high of 86.9°F (30.5°C) and a low of 69.1°F (20.6°C), signifies the warmest month of the year in Clayton, Missouri.
What is the least humid month in Clayton?
October is the least humid month in Clayton, Missouri, with an average relative humidity of 70%.
What is the month with the shortest days in Clayton?
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Clayton, MO
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (37.8°F).
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure
Clayton, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Clayton, MO
- Average wind speed in January:
9.2mph - Average wind speed in February:
9.1mph - Average wind speed in March:
8.9mph - Average wind speed in April:
8.9mph - Average wind speed in May:
7.2mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6mph - Average wind speed in October:
7.8mph - Average wind speed in November:
8.4mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity
Clayton, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Clayton, MO
- Average rainfall in January:
1.73" - Average rainfall in February:
1.69" - Average rainfall in March:
2.36" - Average rainfall in April:
3.31" - Average rainfall in May:
3.58" - Average rainfall in June:
3.5"
- Average rainfall in July:
3.19" - Average rainfall in August:
3.31" - Average rainfall in September:
1.97" - Average rainfall in October:
2.17" - Average rainfall in November:
1.73" - Average rainfall in December:
2.05"
The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is February (1.69").
Average rainfall days
Clayton, MO
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
7.6 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
16.7 days - Average rainfall days in August:
14.2 days - Average rainfall days in September:
12 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.5 days).
Average snowfall
Clayton, MO
The month with the highest snowfall is February (2.6").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Clayton, MO
- Average snowfall days in January:
4.7 days - Average snowfall days in February:
5.2 days - Average snowfall days in March:
1.9 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1 days - Average snowfall days in December:
3.1 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Clayton, MO
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 3min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 4min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days
Clayton, MO
- Average sunshine days in January:
21 days - Average sunshine days in February:
16.4 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
11.5 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
15.2 days - Average sunshine days in October:
20 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
19.9 days
The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.2 days).
Average UV index
Clayton, MO
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Clayton, MO
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Clayton, MO
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Clayton, Missouri, USA
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