Climate and monthly weather forecast
Tustin, CA

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Weather in January

January, like December, in Tustin, California, is another refreshing winter month, with temperature in the range of an average high of 65.5°F (18.6°C) and an average low of 52°F (11.1°C). Tustin's average high-temperature in January is a still comfortable 65.5°F (18.6°C), marking an insignificant difference from the 63.1°F (17.3°C) of December. Weather in January »

Weather in February

The last month of the winter, February, is another comfortable month in Tustin, California, with an average temperature ranging between min 50.7°F (10.4°C) and max 64°F (17.8°C). Tustin experiences an average high-temperature of a still refreshing 64°F (17.8°C) in February, marking an insignificant shift from 65.5°F (18.6°C) in January. Weather in February »

Weather in March

March, the first month of the spring in Tustin, is still a comfortable month, with an average temperature fluctuating between 66.2°F (19°C) and 52°F (11.1°C). In March, Tustin experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 64°F (17.8°C) in February to a still comfortable 66.2°F (19°C). Weather in March »

Weather in April

April in Tustin, California, is an agreeable spring month, with an average temperature varying between 54.1°F (12.3°C) and 68.7°F (20.4°C). Tustin observes an average high-temperature of an agreeable 68.7°F (20.4°C) in April, barely different from 66.2°F (19°C) in March. Weather in April »

Weather in May

The last month of the spring, May, is also an agreeable month in Tustin, California, with an average temperature ranging between max 70.3°F (21.3°C) and min 56.7°F (13.7°C). May denotes a minimal variation in the average high-temperature to a still pleasant 70.3°F (21.3°C) from April's 68.7°F (20.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Tustin, California, with an average temperature ranging between min 58.6°F (14.8°C) and max 74.5°F (23.6°C). June experiences an average high-temperature of a warm 74.5°F (23.6°C), barely different from May's 70.3°F (21.3°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Tustin, California, with an average temperature varying between 63.5°F (17.5°C) and 79°F (26.1°C). The onset of July notes an average high-temperature of a still warm 79°F (26.1°C), subtly shifted from June's 74.5°F (23.6°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Tustin, California, with an average temperature varying between 65.1°F (18.4°C) and 80.2°F (26.8°C). August proves to be the warmest month, recording an average peak temperature of 80.2°F (26.8°C) and a minimum temperature of 65.1°F (18.4°C). Weather in August »

Weather in September

September, the first month of the autumn in Tustin, is also a moderately hot month, with an average temperature ranging between min 64.4°F (18°C) and max 79.7°F (26.5°C). As September takes its course, Tustin's average high-temperature registers at a still warm 79.7°F (26.5°C), closely aligning with the preceding month. Weather in September »

Weather in October

October, like September, in Tustin, California, is another warm autumn month, with an average temperature ranging between max 75°F (23.9°C) and min 61.5°F (16.4°C). The advent of October brings an average high-temperature of a still moderately hot 75°F (23.9°C), exhibiting minor difference from the previous month. Weather in October »

Weather in November

November, the last month of the autumn in Tustin, is another pleasant month, with an average temperature ranging between min 56.5°F (13.6°C) and max 70°F (21.1°C). The advent of November observes an average high-temperature of a pleasant 70°F (21.1°C), nearly identical to October's 75°F (23.9°C). Weather in November »

Weather in December

December, the first month of the winter in Tustin, is still a refreshing month, with an average temperature fluctuating between 51.3°F (10.7°C) and 63.1°F (17.3°C). December is the coldest month of the year, registering average temperatures as high as 63.1°F (17.3°C) and as low as 51.3°F (10.7°C). Weather in December »
Updated: Feb 9, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How much does it rain in Tustin?

In Tustin, California, during the entire year, the rain falls for 51.9 days and collects up to 4.13" (105mm) of precipitation.

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

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

When is Daylight Saving Time (DST) in Tustin?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Tustin, 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.

What is the most humid month in Tustin?

The most humid month is June, with an average relative humidity of 70%.

What is the driest month in Tustin?

June is the month with the least rainfall in Tustin. Rain falls for 1.3 days and accumulates 0.04" (1mm) of precipitation.

When are the longest days in Tustin?

June has the longest days of the year, with an average of 14h and 24min of daylight.

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

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

What is the month with the most sunshine in Tustin?

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

What is the hottest time of year in Tustin?

The month of August sees the average highest temperatures, reaching 80.2°F (26.8°C) at the peak and 65.1°F (18.4°C) at the low.

What is the least humid month in Tustin?

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

What are the coldest months in Tustin?

In Tustin, December is known for its average lowest temperatures, reaching a high of 63.1°F (17.3°C) and a low of 51.3°F (10.7°C).

What is the wettest month in Tustin?

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

What is the month with the shortest days in Tustin?

December has the shortest days of the year in Tustin, with an average of 10h and 0min of daylight.

What is the month with the least sunshine in Tustin?

December has the least sunshine of the year, 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).

Average pressure
Tustin, CA

Average pressure - Tustin, CA

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

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).

Average humidity
Tustin, CA

Average humidity - Tustin, CA

The month with the highest relative humidity is June (70%).
The month with the lowest relative humidity is November (55%).

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").

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).

Average daylight / Average sunshine
Tustin, CA

Average daylight / Average sunshine - Tustin, CA

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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).

Average UV index
Tustin, CA

Average UV index - Tustin, CA

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

Average visibility
Tustin, CA

Average visibility - Tustin, CA

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

Tustin, California, USA

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