Clayton
California, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Clayton, CA

January, the same as December, in Clayton, California, is another mild winter month, with average temperature ranging between max 56.3°F (13.5°C) and min 41.7°F (5.4°C). In January, the average high-temperature is essentially the same as in December - a still mild 56.3°F (13.5°C). Weather in January »

The last month of the winter, February, is another mild month in Clayton, California, with average temperature fluctuating between 59.9°F (15.5°C) and 42.3°F (5.7°C). In Clayton, California, the average high-temperature is essentially the same as in January - a still mild 59.9°F (15.5°C). Weather in February »

The first month of the spring, March, is a comfortable month in Clayton, California, with temperature in the range of an average high of 63°F (17.2°C) and an average low of 43.9°F (6.6°C). In March, the average high-temperature is essentially the same as in February - a comfortable 63°F (17.2°C). Weather in March »

April in Clayton, California, is a pleasant spring month, with average temperature ranging between min 46.4°F (8°C) and max 68.7°F (20.4°C). In Clayton, the average high-temperature slightly increases, from an enjoyable 63°F (17.2°C) in March, to an agreeable 68.7°F (20.4°C). Weather in April »

May, the last month of the spring, in Clayton, is a moderately hot month, with temperature in the range of an average low of 50°F (10°C) and an average high of 73.9°F (23.3°C). In May, the average high-temperature is almost the same as in April - a warm 73.9°F (23.3°C). Weather in May »

June, the first month of the summer, in Clayton, is still a warm month, with temperature in the range of an average low of 54.7°F (12.6°C) and an average high of 82°F (27.8°C). In Clayton, California, the average high-temperature slightly increases, from 73.9°F (23.3°C) in May, to a still warm 82°F (27.8°C). Weather in June »

July, the same as June, is another warm summer month in Clayton, California, with temperature in the range of an average high of 85.6°F (29.8°C) and an average low of 56.1°F (13.4°C). With an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 56.1°F (13.4°C), July is the warmest month. In July, the average heat index is calculated to a tropical 89.1°F (31.7°C). Weather in July »

August, the last month of the summer, in Clayton, is another warm month, with average temperature ranging between max 85.1°F (29.5°C) and min 57.4°F (14.1°C). In Clayton, the average high-temperature in August is practically the same as in July - a still warm 85.1°F (29.5°C). Weather in August »

September, the first month of the autumn, in Clayton, is also a moderately hot month, with average temperature ranging between min 57.6°F (14.2°C) and max 83.5°F (28.6°C). In Clayton, the average high-temperature is essentially the same as in August - a still moderately hot 83.5°F (28.6°C). Weather in September »

October, like September, in Clayton, California, is another warm autumn month, with temperature in the range of an average low of 54°F (12.2°C) and an average high of 75°F (23.9°C). In October, the average high-temperature slightly decreases, from a moderately hot 83.5°F (28.6°C) in September, to a still warm 75°F (23.9°C). Weather in October »

November, the last month of the autumn, in Clayton, is also an enjoyable month, with average temperature varying between 46.9°F (8.3°C) and 63.7°F (17.6°C). In November, the average high-temperature drops, from a warm 75°F (23.9°C) in October, to an enjoyable 63.7°F (17.6°C). Weather in November »

December, the first month of the winter, in Clayton, is still a mild month, with average temperature fluctuating between 55.4°F (13°C) and 41.9°F (5.5°C). The coldest month is December, with an average high-temperature of 55.4°F (13°C) and an average low-temperature of 41.9°F (5.5°C). Weather in December »

What is the most humid month in Clayton?

Months with the highest humidity in Clayton are January and March, with an average relative humidity of 73%.

How many days does it rain in Clayton?

Throughout the year, in Clayton, California, there are 50 rainfall days, and 4.76" (121mm) of precipitation is accumulated.

When is the lowest UV index in Clayton?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.

What is the rainiest month in Clayton?

February is the month with the most rainfall in Clayton, California. Rain falls for 5.6 days and accumulates 0.98" (25mm) of precipitation.

When are the longest days in Clayton?

The month with the longest days is June, with an average of 14.8h of daylight.

What are the months with the highest UV index in Clayton?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Clayton.

What is the warmest month in Clayton?

With an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 56.1°F (13.4°C), July is the warmest month in Clayton.

What is the driest month in Clayton?

Months with the least rainfall in Clayton are July and August Rain falls for 1.4 days and accumulates 0.04" (1mm) of rain.

What month has the most sunshine in Clayton?

July has the most sunshine of the year, with an average of 12.1h of sunshine.

What is the least humid month in Clayton?

Months with the lowest humidity in Clayton, California, are September and October, with an average relative humidity of 55%.

What is the coldest month in Clayton?

The coldest month is December, with an average high-temperature of 55.4°F (13°C) and an average low-temperature of 41.9°F (5.5°C).

What is the month with the shortest days in Clayton?

The month with the shortest days is December, with an average of 9.6h of daylight.

What is the month with the least sunshine in Clayton?

December has the least sunshine of the year in Clayton, California, with an average of 5.8h of sunshine.
Average temperature - Clayton, CA
Average humidity - Clayton, CA
Average rainfall - Clayton, CA

The wettest month (with the highest rainfall) is February (0.98").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days - Clayton, CA
Average daylight / Average sunshine - Clayton, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.8h).

Average UV index - Clayton, CA