Tustin, CA
Climate overview — based on NOAA 1991-2020 normals from SANTA ANA FIRE STN, CA US.
Year-round temperatures (°F)
Climate summary
Tustin has an annual average temperature of 66.1°F with about 12.5 inches of precipitation per year. The warmest month is August (average high 84.6°F), and the coldest is December (average low 48.1°F). February is typically the wettest month (3.16 in) and August the driest (0.00 in).
Best time to visit Tustin
Full guide →Climate change signal
All-time records →44 of 366 (12%) of Tustin's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1900s | 0 | |
| 1910s | 11 | |
| 1920s | 22 | |
| 1930s | 59 | |
| 1940s | 26 | |
| 1950s | 39 | |
| 1960s | 23 | |
| 1970s | 32 | |
| 1980s | 24 | |
| 1990s | 14 | |
| 2000s | 60 | |
| 2010s | 39 | |
| 2020s | 17 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 69.3°F | 48.7°F | 59.0°F | 2.88 in | — | 6 |
| February | 69.3°F | 49.5°F | 59.4°F | 3.16 in | — | 7 |
| March | 71.2°F | 51.8°F | 61.5°F | 1.71 in | — | 5 |
| April | 73.2°F | 54.2°F | 63.7°F | 0.82 in | — | 3 |
| May | 74.7°F | 58.1°F | 66.4°F | 0.29 in | — | 2 |
| June | 77.7°F | 61.3°F | 69.5°F | 0.08 in | — | 1 |
| July | 82.5°F | 64.7°F | 73.6°F | 0.03 in | — | 1 |
| August | 84.6°F | 65.3°F | 75.0°F | 0.00 in | — | 0 |
| September | 83.8°F | 63.9°F | 73.8°F | 0.12 in | — | 1 |
| October | 79.4°F | 59.4°F | 69.4°F | 0.50 in | — | 2 |
| November | 74.0°F | 52.8°F | 63.4°F | 0.79 in | — | 3 |
| December | 68.4°F | 48.1°F | 58.2°F | 2.16 in | — | 6 |
Climate twins of Tustin
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).