Monthly weather forecast and climate
Diablo, CA

Weather in January

January, like December, is a moderate winter month in Diablo, California, with average temperature varying between 56.8°F (13.8°C) and 42.1°F (5.6°C). In Diablo, California, the average high-temperature is relatively the same as in December - a still mild 56.8°F (13.8°C). Weather in January »

Weather in February

February, the last month of the winter, in Diablo, is also a moderate month, with average temperature varying between 59.7°F (15.4°C) and 42.6°F (5.9°C). In Diablo, the average high-temperature is relatively the same as in January - a still moderate 59.7°F (15.4°C). Weather in February »

Weather in March

The first month of the spring, March, is a comfortable month in Diablo, California, with temperature in the range of an average low of 43.5°F (6.4°C) and an average high of 63°F (17.2°C). In March, the average high-temperature is essentially the same as in February - an enjoyable 63°F (17.2°C). Weather in March »

Weather in April

April is a pleasant spring month in Diablo, California, with average temperature ranging between max 68°F (20°C) and min 45.7°F (7.6°C). In April, the average high-temperature is essentially the same as in March - a pleasant 68°F (20°C). Weather in April »

Weather in May

May, the last month of the spring, in Diablo, is also an agreeable month, with average temperature ranging between max 72.7°F (22.6°C) and min 48.7°F (9.3°C). In Diablo, the average high-temperature is practically the same as in April - a still pleasant 72.7°F (22.6°C). Weather in May »

Weather in June

June, the first month of the summer, in Diablo, is a moderately hot month, with average temperature ranging between max 80.2°F (26.8°C) and min 53.8°F (12.1°C). In Diablo, the average high-temperature slightly increases, from a pleasant 72.7°F (22.6°C) in May, to a moderately hot 80.2°F (26.8°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Diablo, California, with temperature in the range of an average low of 55.2°F (12.9°C) and an average high of 83.8°F (28.8°C). With an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 55.2°F (12.9°C), July is the warmest month. In July, the average heat index is calculated to a tropical 86.7°F (30.4°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Diablo, California, with average temperature varying between 82.9°F (28.3°C) and 56.7°F (13.7°C). In Diablo, the average high-temperature is relatively the same as in July - a still moderately hot 82.9°F (28.3°C). Weather in August »

Weather in September

September, the first month of the autumn, in Diablo, is also a moderately hot month, with temperature in the range of an average low of 56.7°F (13.7°C) and an average high of 82°F (27.8°C). In Diablo, the average high-temperature is essentially the same as in August - a still moderately hot 82°F (27.8°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Diablo, California, with average temperature fluctuating between 53.8°F (12.1°C) and 74.3°F (23.5°C). In October, the average high-temperature slightly decreases, from a moderately hot 82°F (27.8°C) in September, to a still warm 74.3°F (23.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an enjoyable month in Diablo, California, with average temperature varying between 46.9°F (8.3°C) and 64°F (17.8°C). In Diablo, the average high-temperature drops, from a moderately hot 74.3°F (23.5°C) in October, to an enjoyable 64°F (17.8°C). Weather in November »

Weather in December

The first month of the winter, December, is also a moderate month in Diablo, California, with average temperature varying between 42.3°F (5.7°C) and 55.8°F (13.2°C). With an average high-temperature of 55.8°F (13.2°C) and an average low-temperature of 42.3°F (5.7°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Diablo?

In Diablo, California, during the entire year, the rain falls for 65.6 days and collects up to 11.22" (285mm) of precipitation.

What are the months with the lowest UV index in Diablo?

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

What is the wettest month in Diablo?

February is the month with the most rainfall in Diablo. Rain falls for 8 days and accumulates 2.36" (60mm) of precipitation.

What is the most humid month in Diablo?

March is the most humid month, with an average relative humidity of 74%.

When are the longest days in Diablo?

June has the longest days of the year in Diablo, with an average of 14.8h of daylight.

When is the highest UV index in Diablo?

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

What is the warmest month in Diablo?

The warmest month is July, with an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 55.2°F (12.9°C).

What is the driest month in Diablo?

July and August are months without rainfall in Diablo, California.

What month has the most sunshine in Diablo?

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

What is the least humid month in Diablo?

September is the least humid month in Diablo, California, with an average relative humidity of 57%.

When does it rain in Diablo?

Months with rainfall are January through June, September through December.

What is the coldest month in Diablo?

With an average high-temperature of 55.8°F (13.2°C) and an average low-temperature of 42.3°F (5.7°C), December is the coldest month.

What is the month with the shortest days in Diablo?

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

What is the month with the least sunshine in Diablo?

December has the least sunshine of the year, with an average of 5.8h of sunshine.

Average temperature
Diablo, CA

Average temperature - Diablo, CA

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (55.8°F).

Months with the highest average low temperature are August and September (56.7°F).
The coldest month (with the lowest average low temperature) is January (42.1°F).

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Average pressure
Diablo, CA

Average pressure - Diablo, CA

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed
Diablo, CA

Average wind speed - Diablo, CA

The windiest month (with the highest average wind speed) is May (6.9mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).

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Average rainfall
Diablo, CA

Average rainfall - Diablo, CA

The wettest month (with the highest rainfall) is February (2.36").
The driest months (with the least rainfall) are July and August (0").

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Average rainfall days
Diablo, CA

Average rainfall days - Diablo, CA

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.6 days).

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Average daylight / Average sunshine
Diablo, CA

Average daylight / Average sunshine - Diablo, 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).

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Average sunshine days
Diablo, CA

Average sunshine days - Diablo, CA

The month with the most sunshine days is July (30.2 days).
The month with the least sunshine days is March (17.6 days).

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Average UV index
Diablo, CA

Average UV index - Diablo, CA

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average visibility
Diablo, CA

Average visibility - Diablo, CA

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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