Monthly weather forecast and climate
Tustin, CA

Weather in January

January, the same as December, is another enjoyable winter month in Tustin, California, with average temperature varying between 52°F (11.1°C) and 65.5°F (18.6°C). In January, the average high-temperature is essentially 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 Tustin, California, with average temperature varying between 50.7°F (10.4°C) and 64°F (17.8°C). In Tustin, California, the average high-temperature is essentially the same as in January - a still enjoyable 64°F (17.8°C). Weather in February »

Weather in March

March, the first month of the spring, in Tustin, is also an enjoyable month, with average temperature fluctuating between 52°F (11.1°C) and 66.2°F (19°C). In Tustin, 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 Tustin, California, is an agreeable spring month, with average temperature ranging between min 54.1°F (12.3°C) and max 68.7°F (20.4°C). In Tustin, the average high-temperature is relatively the same as in March - an agreeable 68.7°F (20.4°C). Weather in April »

Weather in May

May, the last month of the spring, in Tustin, is another pleasant month, with average temperature fluctuating between 56.7°F (13.7°C) and 70.3°F (21.3°C). In May, the average high-temperature is relatively the same as in April - a still pleasant 70.3°F (21.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Tustin, California, with average temperature fluctuating between 58.6°F (14.8°C) and 74.5°F (23.6°C). In June, the average high-temperature is essentially the same as in May - a warm 74.5°F (23.6°C). Weather in June »

Weather in July

July, like June, in Tustin, California, is another warm summer month, with average temperature fluctuating between 63.5°F (17.5°C) and 79°F (26.1°C). In July, the average high-temperature is essentially the same as in June - a still warm 79°F (26.1°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Tustin, California, with average temperature varying between 65.1°F (18.4°C) and 80.2°F (26.8°C). August is the warmest month, with an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 65.1°F (18.4°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Tustin, California, with average temperature ranging between max 79.7°F (26.5°C) and min 64.4°F (18°C). In Tustin, the average high-temperature is almost the same as in August - a still warm 79.7°F (26.5°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Tustin, California, with temperature in the range of an average low of 61.5°F (16.4°C) and an average high of 75°F (23.9°C). In Tustin, the average high-temperature in October is essentially the same as in September - a still moderately hot 75°F (23.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Tustin, California, with average temperature varying between 56.5°F (13.6°C) and 70°F (21.1°C). In November, the average high-temperature is relatively the same as in October - an agreeable 70°F (21.1°C). Weather in November »

Weather in December

December, the first month of the winter, in Tustin, is also an enjoyable month, with average temperature varying between 63.1°F (17.3°C) and 51.3°F (10.7°C). December is the coldest month, with an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 51.3°F (10.7°C). Weather in December »
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FAQ

How much does it rain in Tustin?

Throughout the year, there are 51.9 rainfall days, and 4.13" (105mm) of precipitation is accumulated.

What is the month with the lowest UV index in Tustin?

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

What is the most humid month in Tustin?

With an average relative humidity of 70%, June is the most humid month in Tustin.

What is the driest month in Tustin?

The month with the least rainfall in Tustin is June when the rain falls for 1.3 days and typically collects 0.04" (1mm) of precipitation.

When are the longest days in Tustin?

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

What are the months with the highest UV index in Tustin?

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

What are the months with the most sunshine in Tustin?

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

What is the warmest month in Tustin?

With an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 65.1°F (18.4°C), August is the warmest month in Tustin, California.

What is the least humid month in Tustin?

With an average relative humidity of 55%, November is the least humid month in Tustin.

What is the coldest month in Tustin?

The coldest month is December, with an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 51.3°F (10.7°C).

What is the rainiest month in Tustin?

December is the month with the most rainfall in Tustin, California. Rain falls for 6.5 days and accumulates 0.87" (22mm) of precipitation.

What is the month with the shortest days in Tustin?

With an average of 9.9h of daylight, December has the shortest days of the year in Tustin.

What is the month with the least sunshine in Tustin?

The month with the least sunshine in Tustin, California, is December, with an average of 6.7h of sunshine.

Average temperature
Tustin, CA

Average temperature - Tustin, 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 (63.1°F).

The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (50.7°F).

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Average pressure
Tustin, CA

Average pressure - Tustin, CA

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

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Average wind speed
Tustin, CA

Average wind speed - Tustin, CA

The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.8mph).

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Average rainfall
Tustin, CA

Average rainfall - Tustin, CA

The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Tustin, CA

Average rainfall days - Tustin, CA

The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.3 days).

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Average daylight / Average sunshine
Tustin, CA

Average daylight / Average sunshine - Tustin, 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: 6.7h).

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Average sunshine days
Tustin, CA

Average sunshine days - Tustin, CA

The month with the most sunshine days is June (26.9 days).
The month with the least sunshine days is February (20.3 days).

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Average UV index
Tustin, CA

Average UV index - Tustin, 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
Tustin, CA

Average visibility - Tustin, 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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