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7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Arcata, CA
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September
Average Temperature
High
19°
Feels 19
Low
10°
Feels 10
Average Precipitation
4 Days
Rain amount
16.5mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
17°
3
17°
4
17°
5
17°
6
17°
7
18°
8
19°
9
20°
10
20°
11
19°
12
19°
13
19°
14
19°
15
20°
16
20°
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Wednesday, September 2, 2026
Day
17°
Feels 16
Wind
31 km/h S
Gust
47 km/h
Humidity
77%
P.O.P
90%
Rain
~10 mm
Night
14°
Feels 14
Wind
21 km/h S
Gust
32 km/h
Humidity
100%
P.O.P
90%
Rain
~10 mm
Historical Averages
Sep 2
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.