Climate and monthly weather forecast
O'Brien, CA

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Weather in January

January is a cool winter month in O'Brien, California, with an average temperature fluctuating between 35.2°F (1.8°C) and 50.4°F (10.2°C). Shifting into January, O'Brien records an average high-temperature of a fresh 50.4°F (10.2°C), presenting minor fluctuations compared to the previous month. Weather in January »

Weather in February

The last month of the winter, February, is another cool month in O'Brien, California, with an average temperature fluctuating between 51.6°F (10.9°C) and 35.1°F (1.7°C). The transition into February shows a subtle variation to a still fresh 51.6°F (10.9°C) from January's 50.4°F (10.2°C) in the average high-temperature. Weather in February »

Weather in March

The first month of the spring, March, is still a cool month in O'Brien, California, with an average temperature fluctuating between 54.1°F (12.3°C) and 37°F (2.8°C). February's transformation into March witnesses an average high-temperature of a still fresh 54.1°F (12.3°C), noting a minor change from the preceding month. Weather in March »

Weather in April

April in O'Brien, California, is a comfortable spring month, with an average temperature fluctuating between 62.4°F (16.9°C) and 40.3°F (4.6°C). With the onset of April, O'Brien's average high-temperature sees a modest rise, moving from March's fresh 54.1°F (12.3°C) to a refreshing 62.4°F (16.9°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in O'Brien, California, with an average temperature varying between 71.2°F (21.8°C) and 46°F (7.8°C). O'Brien perceives a slight temperature ascent during May, with average high-temperatures adjusting from a refreshing 62.4°F (16.9°C) in April to an agreeable 71.2°F (21.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in O'Brien, California, with an average temperature fluctuating between 82.4°F (28°C) and 53.8°F (12.1°C). June brings a rise in O'Brien's average high-temperature, moving from an agreeable 71.2°F (21.8°C) in May to a warm 82.4°F (28°C). Weather in June »

Weather in July

July in O'Brien, California, is a hot summer month, with an average temperature ranging between min 59.4°F (15.2°C) and max 91.6°F (33.1°C). In O'Brien, July is the warmest month, with temperatures averaging a high of 91.6°F (33.1°C) and a low of 59.4°F (15.2°C). Weather in July »

Weather in August

The last month of the summer, August, is also a hot month in O'Brien, California, with an average temperature fluctuating between 90.1°F (32.3°C) and 58.6°F (14.8°C). August's beginning signals an average high-temperature of a still hot 90.1°F (32.3°C), barely different from July's 91.6°F (33.1°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in O'Brien, California, with an average temperature varying between 54.3°F (12.4°C) and 84°F (28.9°C). O'Brien's progression into September involves a gentle drop in the average high-temperature, from a hot 90.1°F (32.3°C) in August to a warm 84°F (28.9°C). Weather in September »

Weather in October

October, the same as September, in O'Brien, California, is another pleasant autumn month, with temperature in the range of an average low of 46.8°F (8.2°C) and an average high of 71.4°F (21.9°C). A moderate decline in the average high-temperature is seen during October, decreasing from a moderately hot 84°F (28.9°C) in September to an agreeable 71.4°F (21.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is another mild month in O'Brien, California, with an average temperature ranging between min 38.5°F (3.6°C) and max 56.5°F (13.6°C). The onset of November brings a clear temperature shift, with the average high-temperature decreasing from a pleasant 71.4°F (21.9°C) in October to a moderate 56.5°F (13.6°C). Weather in November »

Weather in December

December, the first month of the winter in O'Brien, is still a chilly month, with an average temperature ranging between max 47.8°F (8.8°C) and min 33.6°F (0.9°C). December is the coldest month, with the temperature often reaching an average high of 47.8°F (8.8°C) and an average low of 33.6°F (0.9°C). Weather in December »
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Frequently asked questions

How many days does it rain in O'Brien?

Throughout the year, in O'Brien, there are 102.3 rainfall days, and 24.21" (615mm) of precipitation is accumulated.

When does it snow in O'Brien?

Months with snowfall are January through March, November and December.

How many days does it snow in O'Brien?

Throughout the year, there are 4.6 snowfall days, and 4.45" (113mm) of snow is accumulated.

What is the month with the lowest UV index in O'Brien?

The months with the lowest UV index are February, November and December, with an average maximum UV index of 2.

What is the most humid month in O'Brien?

The most humid month in O'Brien, California, is March, with an average relative humidity of 77%.

What is the rainiest month in O'Brien?

March is the month with the most rainfall. Rain falls for 16.8 days and accumulates 4.8" (122mm) of precipitation.

When is Daylight Saving Time (DST) in O'Brien?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in O'Brien, 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 it does not snow in O'Brien?

April through October are months without snowfall.

When are the longest days in O'Brien?

June has the longest days of the year in O'Brien, California, with an average of 15h and 6min of daylight.

What part of the year is the hottest in O'Brien?

July, known for its average high temperature of 91.6°F (33.1°C) and an average low temperature of 59.4°F (15.2°C), is the warmest month in O'Brien.

What is the driest month in O'Brien?

July is the month with the least rainfall in O'Brien. Rain falls for 2.5 days and accumulates 0.12" (3mm) of precipitation.

What month has the most sunshine in O'Brien?

The month with the most sunshine in O'Brien is July, with an average of 12.2h of sunshine.

When is the highest UV index in O'Brien?

July is the month with the highest UV index in O'Brien, California, with an average maximum UV index of 7.

What is the least humid month in O'Brien?

August is the least humid month in O'Brien, California, with an average relative humidity of 37%.

What is the snowiest month in O'Brien?

November is the month with the most snowfall. Snow falls for 0.5 days and accumulates 1.3" (33mm) of snow.

What time of the year is the coldest in O'Brien?

O'Brien's December weather reaches an average high of 47.8°F (8.8°C) and an average low of 33.6°F (0.9°C), making it the coldest month.

What is the month with the shortest days in O'Brien?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

What is the month with the least sunshine in O'Brien?

The month with the least sunshine in O'Brien, California, is December, with an average of 5.3h of sunshine.

Average temperature
O'Brien, CA

Average temperature - O

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is December (47.8°F).

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).

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Average pressure
O'Brien, CA

Average pressure - O

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

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Average wind speed
O'Brien, CA

Average wind speed - O

The windiest months (with the highest average wind speed) are March and October (5.3mph).
The calmest months (with the lowest average wind speed) are August and November (4.5mph).

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Average rainfall
O'Brien, CA

Average rainfall - O

The wettest month (with the highest rainfall) is March (4.8").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days
O'Brien, CA

Average rainfall days - O

The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is August (1.7 days).

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Average snowfall
O'Brien, CA

Average snowfall - O

The month with the highest snowfall is November (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days
O'Brien, CA

Average snowfall days - O

The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
O'Brien, CA

Average daylight / Average sunshine - O

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days
O'Brien, CA

Average sunshine days - O

The month with the most sunshine days is August (27.1 days).
The month with the least sunshine days is March (11.8 days).

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Average visibility
O'Brien, CA

Average visibility - O

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).

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O'Brien, California, USA

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