Monthly weather forecast and climate
Aliso Viejo, CA

Weather in January

January, like December, in Aliso Viejo, California, is another enjoyable winter month, with average temperature varying between 64.9°F (18.3°C) and 50.5°F (10.3°C). In January, the average high-temperature is almost the same as in December - a still enjoyable 64.9°F (18.3°C). Weather in January »

Weather in February

February, the last month of the winter, in Aliso Viejo, is another comfortable month, with average temperature varying between 49.6°F (9.8°C) and 63.7°F (17.6°C). In February, the average high-temperature is essentially the same as in January - a still enjoyable 63.7°F (17.6°C). Weather in February »

Weather in March

March, the first month of the spring, in Aliso Viejo, is also an enjoyable month, with average temperature varying between 50.5°F (10.3°C) and 65.8°F (18.8°C). In March, the average high-temperature is essentially the same as in February - a still enjoyable 65.8°F (18.8°C). Weather in March »

Weather in April

April is a pleasant spring month in Aliso Viejo, California, with average temperature ranging between max 68.4°F (20.2°C) and min 53.1°F (11.7°C). In Aliso Viejo, the average high-temperature in April is almost the same as in March - a pleasant 68.4°F (20.2°C). Weather in April »

Weather in May

The last month of the spring, May, is also an agreeable month in Aliso Viejo, California, with average temperature ranging between max 69.6°F (20.9°C) and min 55.2°F (12.9°C). In Aliso Viejo, California, the average high-temperature in May is practically the same as in April - a still pleasant 69.6°F (20.9°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Aliso Viejo, California, with average temperature varying between 73.9°F (23.3°C) and 58.1°F (14.5°C). In Aliso Viejo, the average high-temperature in June is essentially the same as in May - a warm 73.9°F (23.3°C). Weather in June »

Weather in July

July, like June, in Aliso Viejo, California, is another warm summer month, with average temperature fluctuating between 78.4°F (25.8°C) and 63.1°F (17.3°C). In July, the average high-temperature is relatively the same as in June - a still warm 78.4°F (25.8°C). Weather in July »

Weather in August

August, the last month of the summer, in Aliso Viejo, is also a moderately hot month, with temperature in the range of an average low of 64.4°F (18°C) and an average high of 80.2°F (26.8°C). With an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 64.4°F (18°C), August is the warmest month. Weather in August »

Weather in September

September, the first month of the autumn, in Aliso Viejo, is still a warm month, with average temperature fluctuating between 79.5°F (26.4°C) and 63.5°F (17.5°C). In September, the average high-temperature is relatively the same as in August - a still moderately hot 79.5°F (26.4°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Aliso Viejo, California, with average temperature fluctuating between 60.6°F (15.9°C) and 75°F (23.9°C). In Aliso Viejo, the average high-temperature in October is almost the same as in September - a still warm 75°F (23.9°C). Weather in October »

Weather in November

November, the last month of the autumn, in Aliso Viejo, is another pleasant month, with average temperature ranging between min 55.8°F (13.2°C) and max 69.3°F (20.7°C). In Aliso Viejo, the average high-temperature slightly decreases, from a moderately hot 75°F (23.9°C) in October, to an agreeable 69.3°F (20.7°C). Weather in November »

Weather in December

The first month of the winter, December, is also an enjoyable month in Aliso Viejo, California, with temperature in the range of an average low of 50°F (10°C) and an average high of 62.8°F (17.1°C). December is the coldest month, with an average high-temperature of 62.8°F (17.1°C) and an average low-temperature of 50°F (10°C). Weather in December »
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FAQ

How many days does it rain in Aliso Viejo?

In Aliso Viejo, California, during the entire year, the rain falls for 66.3 days and collects up to 5.67" (144mm) of precipitation.

What are the months with the lowest UV index in Aliso Viejo?

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Aliso Viejo.

What is the most humid month in Aliso Viejo?

With an average relative humidity of 71%, June is the most humid month.

What is the driest month in Aliso Viejo?

June is the month with the least rainfall. Rain falls for 2.6 days and accumulates 0.08" (2mm) of precipitation.

When are the longest days in Aliso Viejo?

With an average of 14.4h of daylight, June has the longest days of the year.

When is the highest UV index in Aliso Viejo?

Months with the highest UV index in Aliso Viejo, California, are June through September, with an average maximum UV index of 6.

What is the month with the most sunshine in Aliso Viejo?

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

What is the warmest month in Aliso Viejo?

With an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 64.4°F (18°C), August is the warmest month.

What is the least humid month in Aliso Viejo?

With an average relative humidity of 56%, November is the least humid month in Aliso Viejo.

What is the coldest month in Aliso Viejo?

The coldest month in Aliso Viejo, California, is December, with an average high-temperature of 62.8°F (17.1°C) and an average low-temperature of 50°F (10°C).

What is the rainiest month in Aliso Viejo?

The month with the most rainfall is December when the rain falls for 7 days and typically aggregates up to 0.87" (22mm) of precipitation.

What is the month with the shortest days in Aliso Viejo?

December has the shortest days of the year, with an average of 10h of daylight.

What is the month with the least sunshine in Aliso Viejo?

December has the least sunshine of the year in Aliso Viejo, California, with an average of 6.6h of sunshine.

Average temperature
Aliso Viejo, CA

Average temperature - Aliso Viejo, CA

The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (62.8°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 (49.6°F).

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Average pressure
Aliso Viejo, CA

Average pressure - Aliso Viejo, CA

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed
Aliso Viejo, CA

Average wind speed - Aliso Viejo, CA

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.7mph).

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Average rainfall
Aliso Viejo, CA

Average rainfall - Aliso Viejo, CA

The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days
Aliso Viejo, CA

Average rainfall days - Aliso Viejo, CA

The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is June (2.6 days).

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Average daylight / Average sunshine
Aliso Viejo, CA

Average daylight / Average sunshine - Aliso Viejo, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 10h).

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
Aliso Viejo, CA

Average sunshine days - Aliso Viejo, CA

The month with the most sunshine days is January (24.1 days).
The month with the least sunshine days is February (19.6 days).

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Average UV index
Aliso Viejo, CA

Average UV index - Aliso Viejo, 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
Aliso Viejo, CA

Average visibility - Aliso Viejo, 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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