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Hourly
7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Fullerton, CA
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October
Average Temperature
High
27°
Feels 28
Low
15°
Feels 15
Average Precipitation
2 Days
Rain amount
12mm
Snow amount
0cm
Content continues below
Daily Historical Averages
October 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
30°
20
28°
21
24°
22
23°
23
24°
24
28°
25
28°
26
27°
27
27°
28
26°
29
26°
30
25°
31
24°
Forecast
Monday, October 19, 2026
Day
30°
Feels 30
Wind
13 km/h SW
Gust
19 km/h
Humidity
31%
P.O.P
0%
Night
17°
Feels 17
Wind
9 km/h S
Gust
14 km/h
Humidity
94%
P.O.P
0%
Historical Averages
Oct 19
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.