Monthly weather forecast and climate
Portola Hills, CA

Weather in January

January, like December, in Portola Hills, California, is another comfortable winter month, with temperature in the range of an average low of 50°F (10°C) and an average high of 65.1°F (18.4°C). In January, the average high-temperature is practically the same as in December - a still enjoyable 65.1°F (18.4°C). Weather in January »

Weather in February

The last month of the winter, February, is another comfortable month in Portola Hills, California, with average temperature fluctuating between 64.2°F (17.9°C) and 48.7°F (9.3°C). In February, the average high-temperature is essentially the same as in January - a still comfortable 64.2°F (17.9°C). Weather in February »

Weather in March

The first month of the spring, March, is still a comfortable month in Portola Hills, California, with average temperature varying between 50.2°F (10.1°C) and 66.2°F (19°C). In Portola Hills, the average high-temperature in March is almost the same as in February - a still enjoyable 66.2°F (19°C). Weather in March »

Weather in April

April is an agreeable spring month in Portola Hills, California, with average temperature ranging between min 52.5°F (11.4°C) and max 69.3°F (20.7°C). In Portola Hills, the average high-temperature is relatively the same as in March - an agreeable 69.3°F (20.7°C). Weather in April »

Weather in May

The last month of the spring, May, is another pleasant month in Portola Hills, California, with average temperature varying between 70.9°F (21.6°C) and 55.2°F (12.9°C). In Portola Hills, the average high-temperature in May is relatively the same as in April - a still pleasant 70.9°F (21.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Portola Hills, California, with temperature in the range of an average high of 75.4°F (24.1°C) and an average low of 57.7°F (14.3°C). In June, the average high-temperature is practically the same as in May - a warm 75.4°F (24.1°C). Weather in June »

Weather in July

July, like June, in Portola Hills, California, is another warm summer month, with temperature in the range of an average high of 80.4°F (26.9°C) and an average low of 63°F (17.2°C). In Portola Hills, the average high-temperature is almost the same as in June - a still warm 80.4°F (26.9°C). Weather in July »

Weather in August

August, the last month of the summer, in Portola Hills, is also a moderately hot month, with average temperature ranging between max 82°F (27.8°C) and min 64.4°F (18°C). With an average high-temperature of 82°F (27.8°C) and an average low-temperature of 64.4°F (18°C), August is the warmest month. The average heat index is estimated at 84.9°F (29.4°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Portola Hills, California, with average temperature varying between 63.7°F (17.6°C) and 81°F (27.2°C). In September, the average high-temperature is practically the same as in August - a still moderately hot 81°F (27.2°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Portola Hills, California, with average temperature varying between 75.9°F (24.4°C) and 59.9°F (15.5°C). In October, the average high-temperature is practically the same as in September - a still warm 75.9°F (24.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Portola Hills, California, with temperature in the range of an average low of 54.7°F (12.6°C) and an average high of 70°F (21.1°C). In November, the average high-temperature marginally drops, from a warm 75.9°F (24.4°C) in October, to a pleasant 70°F (21.1°C). Weather in November »

Weather in December

December, the first month of the winter, in Portola Hills, is still a comfortable month, with temperature in the range of an average high of 63.1°F (17.3°C) and an average low of 49.5°F (9.7°C). December is the coldest month, with an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 49.5°F (9.7°C). Weather in December »
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FAQ

How many days does it rain in Portola Hills?

Throughout the year, there are 65.4 rainfall days, and 9.17" (233mm) of precipitation is accumulated.

What is the month with the lowest UV index in Portola Hills?

Months with the lowest UV index in Portola Hills, California, are January through March, November and December, with an average maximum UV index of 4.

What is the most humid month in Portola Hills?

May and June, with an average relative humidity of 69%, are most humid months in Portola Hills, California.

What is the driest month in Portola Hills?

The month with the least rainfall in Portola Hills is June when the rain falls for 2 days and typically collects 0.08" (2mm) of precipitation.

When are the longest days in Portola Hills?

With an average of 14.4h of daylight, June has the longest days of the year in Portola Hills, California.

What are the months with the highest UV index in Portola Hills?

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

What are the months with the most sunshine in Portola Hills?

July and August, with an average of 12h of sunshine, are months with the most sunshine.

What is the warmest month in Portola Hills?

August is the warmest month in Portola Hills, California, with an average high-temperature of 82°F (27.8°C) and an average low-temperature of 64.4°F (18°C).

What is the least humid month in Portola Hills?

The least humid month in Portola Hills is November, with an average relative humidity of 55%.

What is the coldest month in Portola Hills?

With an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 49.5°F (9.7°C), December is the coldest month in Portola Hills, California.

What is the rainiest month in Portola Hills?

The month with the most rainfall is December when the rain falls for 6.7 days and typically aggregates up to 1.85" (47mm) of precipitation.

What is the month with the shortest days in Portola Hills?

The month with the shortest days in Portola Hills is December, with an average of 9.9h of daylight.

What is the month with the least sunshine in Portola Hills?

December has the least sunshine of the year, with an average of 6.6h of sunshine.

Average temperature
Portola Hills, CA

Average temperature - Portola Hills, CA

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).

The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure
Portola Hills, CA

Average pressure - Portola Hills, CA

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are June and September (29.88").

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Average wind speed
Portola Hills, CA

Average wind speed - Portola Hills, CA

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest months (with the lowest average wind speed) are August and September (4.5mph).

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Average humidity
Portola Hills, CA

Average humidity - Portola Hills, CA

Months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).

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Average rainfall
Portola Hills, CA

Average rainfall - Portola Hills, CA

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days
Portola Hills, CA

Average rainfall days - Portola Hills, CA

The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).

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Average daylight / Average sunshine
Portola Hills, CA

Average daylight / Average sunshine - Portola Hills, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days
Portola Hills, CA

Average sunshine days - Portola Hills, CA

Months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).

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Average UV index
Portola Hills, CA

Average UV index - Portola Hills, CA

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average visibility
Portola Hills, CA

Average visibility - Portola Hills, 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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