Monthly Historical AveragesFullerton, CA
Average Temperature
High
29°
Feels 30
Low
18°
Feels 18
Average Precipitation
1 Days
1.5mm
0cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastFriday, July 17, 2026
Day
29°Feels 29
Wind
14 km/h SW
Gust
20 km/h
Humidity
44%
P.O.P
0%
Night
20°Feels 21
Wind
12 km/h S
Gust
18 km/h
Humidity
83%
P.O.P
0%
Historical AveragesJul 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity