Monthly Historical AveragesTustin, CA
Average Temperature
High
21°
Feels 21
Low
8°
Feels 7
Average Precipitation
4 Days
29.3mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastThursday, January 1, 2026
Day
19°Feels 19
Wind
15 km/h SW
Gust
23 km/h
Humidity
71%
P.O.P
100%
Rain
15-20 mm
Night
13°Feels 13
Wind
3 km/h E
Gust
5 km/h
Humidity
92%
P.O.P
20%
Historical AveragesJan 1
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity