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7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
San Nicolas Island, CA
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September
Average Temperature
High
20°
Feels 20
Low
16°
Feels 16
Average Precipitation
1 Days
Rain amount
4.3mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
25°
17
21°
18
21°
19
20°
20
20°
21
23°
22
19°
23
19°
24
20°
25
20°
26
20°
27
20°
28
19°
29
19°
30
19°
Forecast
Wednesday, September 16, 2026
Day
25°
Feels 26
Wind
20 km/h W
Gust
30 km/h
Humidity
64%
P.O.P
20%
Night
17°
Feels 16
Wind
19 km/h W
Gust
29 km/h
Humidity
88%
P.O.P
20%
Historical Averages
Sep 16
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.