Monthly weather forecast and climate
Mission Viejo, CA

The calm waters on Lake Mission Viejo, California,
The calm waters on Lake Mission Viejo, California,

Weather in January

January, the same as December, is another comfortable winter month in Mission Viejo, California, with temperature in the range of an average low of 49.6°F (9.8°C) and an average high of 65.5°F (18.6°C). In January, the average high-temperature is relatively the same as in December - a still comfortable 65.5°F (18.6°C). Weather in January »

Weather in February

The last month of the winter, February, is also an enjoyable month in Mission Viejo, California, with temperature in the range of an average low of 48.7°F (9.3°C) and an average high of 64°F (17.8°C). In February, the average high-temperature is essentially the same as in January - a still comfortable 64°F (17.8°C). Weather in February »

Weather in March

The first month of the spring, March, is still a comfortable month in Mission Viejo, California, with average temperature ranging between max 66.2°F (19°C) and min 50.4°F (10.2°C). In March, the average high-temperature is practically the same as in February - a still enjoyable 66.2°F (19°C). Weather in March »

Weather in April

April in Mission Viejo, California, is an agreeable spring month, with temperature in the range of an average high of 68.5°F (20.3°C) and an average low of 52.5°F (11.4°C). In Mission Viejo, the average high-temperature in April is almost the same as in March - an agreeable 68.5°F (20.3°C). Weather in April »

Weather in May

The last month of the spring, May, is also an agreeable month in Mission Viejo, California, with average temperature fluctuating between 70.2°F (21.2°C) and 55.2°F (12.9°C). In Mission Viejo, the average high-temperature is relatively the same as in April - a still agreeable 70.2°F (21.2°C). Weather in May »

Weather in June

June, the first month of the summer, in Mission Viejo, is a warm month, with average temperature fluctuating between 57.4°F (14.1°C) and 74.1°F (23.4°C). In Mission Viejo, the average high-temperature is essentially the same as in May - a warm 74.1°F (23.4°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Mission Viejo, California, with average temperature varying between 79°F (26.1°C) and 62.4°F (16.9°C). In Mission Viejo, the average high-temperature is relatively the same as in June - a still moderately hot 79°F (26.1°C). Weather in July »

Weather in August

August, the last month of the summer, in Mission Viejo, is also a moderately hot month, with temperature in the range of an average high of 80.8°F (27.1°C) and an average low of 64°F (17.8°C). With an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64°F (17.8°C), August is the warmest month. The average heat index is appraised at 83.3°F (28.5°C). Weather in August »

Weather in September

September, the first month of the autumn, in Mission Viejo, is still a warm month, with average temperature varying between 63.3°F (17.4°C) and 79.7°F (26.5°C). In September, the average high-temperature is essentially the same as in August - a still moderately hot 79.7°F (26.5°C). Weather in September »

Weather in October

October, like September, in Mission Viejo, California, is another warm autumn month, with average temperature fluctuating between 60.1°F (15.6°C) and 75.2°F (24°C). In October, the average high-temperature is relatively the same as in September - a still moderately hot 75.2°F (24°C). Weather in October »

Weather in November

The last month of the autumn, November, is another pleasant month in Mission Viejo, California, with average temperature varying between 69.3°F (20.7°C) and 54.7°F (12.6°C). In Mission Viejo, the average high-temperature in November slightly decreases, from a moderately hot 75.2°F (24°C) in October, to a pleasant 69.3°F (20.7°C). Weather in November »

Weather in December

December, the first month of the winter, in Mission Viejo, is still a comfortable month, with average temperature fluctuating between 49.8°F (9.9°C) and 63°F (17.2°C). The coldest month is December, with an average high-temperature of 63°F (17.2°C) and an average low-temperature of 49.8°F (9.9°C). Weather in December »
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FAQ

How much does it rain in Mission Viejo?

Throughout the year, in Mission Viejo, California, there are 64.1 rainfall days, and 5.67" (144mm) of precipitation is accumulated.

When is the lowest UV index in Mission Viejo?

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

What is the most humid month in Mission Viejo?

May and June, with an average relative humidity of 70%, are most humid months.

What is the driest month in Mission Viejo?

June is the month with the least rainfall. Rain falls for 2.3 days and accumulates 0.08" (2mm) of precipitation.

When are the longest days in Mission Viejo?

The month with the longest days in Mission Viejo is June, with an average of 14.4h of daylight.

What are the months with the highest UV index in Mission Viejo?

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

What are the months with the most sunshine in Mission Viejo?

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

What is the warmest month in Mission Viejo?

The warmest month in Mission Viejo, California, is August, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64°F (17.8°C).

What is the least humid month in Mission Viejo?

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

What is the coldest month in Mission Viejo?

With an average high-temperature of 63°F (17.2°C) and an average low-temperature of 49.8°F (9.9°C), December is the coldest month in Mission Viejo, California.

What is the rainiest month in Mission Viejo?

The month with the most rainfall in Mission Viejo, California, is December when the rain falls for 6.7 days and typically aggregates up to 0.98" (25mm) of precipitation.

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

The month with the shortest days is December, with an average of 10h of daylight.

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

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

Average temperature
Mission Viejo, CA

Average temperature - Mission Viejo, CA

The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (63°F).

The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure
Mission Viejo, CA

Average pressure - Mission Viejo, 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
Mission Viejo, CA

Average wind speed - Mission Viejo, CA

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity
Mission Viejo, CA

Average humidity - Mission Viejo, CA

Months with the highest relative humidity are May and June (70%).
The month with the lowest relative humidity is November (56%).

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Average rainfall
Mission Viejo, CA

Average rainfall - Mission Viejo, CA

The wettest month (with the highest rainfall) is December (0.98").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days
Mission Viejo, CA

Average rainfall days - Mission Viejo, CA

The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is June (2.3 days).

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Average daylight / Average sunshine
Mission Viejo, CA

Average daylight / Average sunshine - Mission 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
Mission Viejo, CA

Average sunshine days - Mission Viejo, CA

Months with the most sunshine days are January and August (24.4 days).
The month with the least sunshine days is May (19.5 days).

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Average UV index
Mission Viejo, CA

Average UV index - Mission 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
Mission Viejo, CA

Average visibility - Mission 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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