Tustin (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Tustin.
Climate overview of Tustin
Tustin, California, United States of America, has a moderate seasonal temperature range, with August reaching 30°C (86°F) and December cooling to 20°C (68°F).
Rainfall is extremely rare, with only 234 mm (9.2 in) falling across the entire year. The most sunshine falls in July, with an average of 12.3 hours of daily sunshine.
Tustin Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Tustin - and find the best time to visit.
Monthly Temperature in Tustin
In Tustin, seasonal changes bring about a moderate variation in temperatures. Average maximum daytime temperatures range from a very warm 30°C (86°F) in August, the warmest time of the year, to a pleasant 20°C (68°F) during cooler months like December.
At night, you can expect temperatures ranging from 18°C (64°F) in August to around 8°C (46°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Tustin
Tustin experiences desert-like conditions in terms of precipitation with almost no rainfall, generally receiving 234 mm (9.2 in) annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives moderate rainfall, averaging 66 mm (2.6 in) of precipitation, recorded across 8 rainy days. In contrast, the driest month August brings less rainfall, with 0.2 mm (0.01 in) over 0 rainy days. For more details, please visit our Tustin Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Tustin
Seasonal changes in sunshine hours are quite dramatic in Tustin. While July receives considerable daily sunshine with up to 12.3 hours, January marks the darkest time of the year, where sunshine is scarce with only 6.6 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Tustin
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, April, May, June, July, October, November and December
- Warmest weather: July, August and September
- Most sunshine: July and August
- Fewer rainy days: May, June, July, August and September
- Seasonal pattern: A distinct dry season from February to November, with very warm summers and pleasant winters
Frequently asked questions about the climate in Tustin
What is the best time to visit Tustin?
January, February, March, April, May, June, July, October, November and December typically offer the most optimal weather in Tustin. In contrast, August and September tend to have less optimal conditions. Tustin has a distinct dry season from February to November, with very warm summers and pleasant winters.
What temperatures can I expect in Tustin?
Daytime highs range from 20°C (68°F) in December to 30°C (86°F) in August. Nighttime lows range from 8°C (46°F) to 18°C (64°F).
How much rain does Tustin get?
Annual rainfall is around 234 mm (9.2 in). December is the wettest month with 66 mm (2.6 in), while August is the driest with 0.2 mm (0.01 in).
How sunny is Tustin?
Tustin receives around 3,279 hours of sunshine per year. July is the sunniest month with 369 hours, while January is the cloudiest with just 198 hours. Overall, Tustin enjoys abundant sunshine.
Tustin 3-Day Forecast
Tustin (CA) 3-Day Forecast
Tustin on the map
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