Climate and monthly weather forecast
Diablo, CA

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Weather in January

January, the same as December, in Diablo, California, is another refreshing winter month, with an average temperature ranging between min 42.1°F (5.6°C) and max 56.8°F (13.8°C). In January, Diablo experiences a minor shift in meteorological conditions with average high-temperatures marked at a still mild 56.8°F (13.8°C), closely mirroring the climate in December. Weather in January »

Weather in February

The last month of the winter, February, is also a moderate month in Diablo, California, with an average temperature varying between 59.7°F (15.4°C) and 42.6°F (5.9°C). Diablo marks the onset of February with an average high-temperature of a still refreshing 59.7°F (15.4°C), a subtle shift from January's 56.8°F (13.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a comfortable month in Diablo, California, with an average temperature ranging between max 63°F (17.2°C) and min 43.5°F (6.4°C). The initiation of March sees an average high-temperature of a still refreshing 63°F (17.2°C), showing minor variations from the previous month. Weather in March »

Weather in April

April is a pleasant spring month in Diablo, California, with an average temperature varying between 68°F (20°C) and 45.7°F (7.6°C). Diablo's average high-temperature in April is a pleasant 68°F (20°C), indicating a subtle variation from March. Weather in April »

Weather in May

May, the last month of the spring in Diablo, is another pleasant month, with an average temperature ranging between min 48.7°F (9.3°C) and max 72.7°F (22.6°C). The transition into May shows a subtle variation to a still pleasant 72.7°F (22.6°C) from April's 68°F (20°C) in the average high-temperature. Weather in May »

Weather in June

June, the first month of the summer in Diablo, is a moderately hot month, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 53.8°F (12.1°C). Diablo's weather shows a minor temperature rise with the arrival of June, moving from an agreeable 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, like June, in Diablo, California, is a moderately hot summer month, 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). Temperature readings reach their annual highs in July, averaging 83.8°F (28.8°C) and a minimum average of 55.2°F (12.9°C). For most parts of July, the heat index is evaluated at a hot 86°F (30°C). Weather in July »

Weather in August

August, the last month of the summer in Diablo, is also a moderately hot month, with an average temperature ranging between max 82.9°F (28.3°C) and min 56.7°F (13.7°C). Diablo's average high-temperature in August sits at a still warm 82.9°F (28.3°C), showing little difference from the previous month. Weather in August »

Weather in September

September, the first month of the autumn in Diablo, is also a moderately hot month, with an average temperature varying between 82°F (27.8°C) and 56.7°F (13.7°C). The onset of September brings an average high-temperature of a still moderately hot 82°F (27.8°C), nearly matching the August temperature. Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Diablo, California, with an average temperature varying between 74.3°F (23.5°C) and 53.8°F (12.1°C). Start of October brings a slight shift in the average high-temperature, dipping a bit from September's 82°F (27.8°C) to a still warm 74.3°F (23.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another comfortable month in Diablo, California, with an average temperature varying between 46.9°F (8.3°C) and 64°F (17.8°C). The start of November signals a decrease in the average high-temperature, transitioning from a warm 74.3°F (23.5°C) in October to a comfortable 64°F (17.8°C). Weather in November »

Weather in December

The first month of the winter, December, is still a refreshing month in Diablo, California, with an average temperature varying between 42.3°F (5.7°C) and 55.8°F (13.2°C). December, on average, is the coldest month, registering a high temperature of 55.8°F (13.2°C) and a low of 42.3°F (5.7°C). Weather in December »
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Frequently asked questions

How many days 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 is the month with the lowest UV index in Diablo?

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

What is the rainiest 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?

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

When is Daylight Saving Time (DST) in Diablo?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Diablo, California, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days in Diablo?

The month with the longest days is June, with an average of 14h and 42min of daylight.

When is the highest UV index in Diablo?

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

What month is the hottest in Diablo?

Diablo's warmest month, July, generally records average temperatures ranging from a high of 83.8°F (28.8°C) to a low 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?

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

What is the least humid month in Diablo?

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

When does it rain in Diablo?

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

What month is the coldest in Diablo?

Diablo, California, records the coldest temperatures in December, averaging a high of 55.8°F (13.2°C) and a low of 42.3°F (5.7°C).

What is the month with the shortest days in Diablo?

The month with the shortest days is December, with an average of 9h and 36min of daylight.

What is the month with the least sunshine in Diablo?

December has the least sunshine of the year in Diablo, California, 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).

The 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"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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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: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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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

The months with the highest UV index are June, July and August (UV index 6).
The 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

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).

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Diablo, California, USA

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