Tustin, CA Weather
Tustin, CA climate is warm during summer when temperatures tend to be in the 70's and cool during winter when temperatures tend to be in the 50's.
The warmest month of the year is August with an average maximum temperature of 84.20 degrees Fahrenheit, while the coldest month of the year is December with an average minimum temperature of 46.00 degrees Fahrenheit.
Temperature variations between night and day tend to be moderate during summer with a difference that can reach 20 degrees Fahrenheit, and moderate during winter with an average difference of 22 degrees Fahrenheit.
The annual average precipitation at Tustin is 13.84 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is January with an average rainfall of 3.18 Inches.
Weather Data
Current Conditions
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Fair, 57°F | Humidity: 20% | Dewpoint: 16°F |
| Wind Speed: CALM | Heat Index: 57°F | ||
| Barometer: 30.05 in. | Wind Chill: 57°F |
Weather Forecast
| Hi: 79°F | Today: Sunny. Highs 70 to 75 near the coast to 76 to 81 inland. Winds northeast 15 to 20 mph with gusts to 35 mph in the morning becoming light. | |
| Lo: 51°F | ||
| Hi: 82°F | Wednesday: Sunny. Highs 72 to 77 near the coast to 79 to 84 inland. Light winds becoming east 15 mph in the afternoon. | |
| Lo: 51°F | ||
| Hi: 83°F | Thanksgiving day: Mostly sunny. Highs 72 to 77 near the coast to 80 to 85 inland. Light winds. | |
| Lo: 51°F | ||
| Hi: 72°F | Friday: Partly cloudy in the morning...Becoming mostly sunny. Patchy fog in the morning. Visibility one quarter mile or less at Times in the morning. Highs 64 to 69 near the coast to 69 to 74 inland. | |
| Lo: 49°F | ||
| Hi: 71°F | Saturday: Partly cloudy. Patchy fog in the morning. Highs around 67 near the coast to 68 to 73 inland. | |
| Lo: 48°F | ||
| Hi: 72°F | Sunday: Mostly sunny. Highs around 67 near the coast to 69 to 74 inland. | |
| Lo: 46°F |
Moon, Sunrise and Sunset
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Moon Phase: Waxing Gibbous Moon | Civil Twilight: 6:04 AM PST |
Sunrise: 6:31 AM PST |
| Sunset: 4:44 PM PST |
Civil Twilight: 5:11 PM PST |
Normal Climate
Normal Temperatures
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max °F | 69.4 | 70.1 | 70.7 | 73.6 | 74.9 | 78.7 | 82.7 | 84.2 | 83.4 | 79.7 | 74.2 | 69.7 | 75.9 |
| Mean °F | 58.0 | 59.1 | 60.2 | 63.0 | 65.7 | 69.3 | 72.9 | 74.3 | 73.2 | 68.9 | 62.4 | 57.9 | 65.4 |
| Min °F | 46.6 | 48.0 | 49.6 | 52.4 | 56.4 | 59.9 | 63.1 | 64.3 | 62.9 | 58.0 | 50.5 | 46.0 | 54.8 |
Normal Precipitation
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inch | 3.18 | 3.05 | 2.78 | 0.67 | 0.25 | 0.11 | 0.02 | 0.12 | 0.34 | 0.36 | 1.17 | 1.79 | 13.84 |

