S
M
T
W
T
F
S
30
79°
44°
31
80°
49°
1
81°
48°
2
81°
49°
3
80°
43°
4
79°
44°
5
79°
50°
6
80°
48°
7
81°
48°
8
77°
39°
9
71°
44°
10
74°
40°
11
76°
40°
12
75°
41°
13
70°
40°
14
70°
39°
15
69°
37°
16
71°
39°
17
70°
44°
18
68°
38°
19
69°
39°
20
69°
45°
21
71°
42°
22
75°
38°
23
74°
43°
24
66°
44°
25
Hist. Avg.
70°
41°
26
Hist. Avg.
70°
41°
27
Hist. Avg.
70°
41°
28
Hist. Avg.
69°
41°
29
Hist. Avg.
69°
41°
30
Hist. Avg.
68°
41°
1
Hist. Avg.
68°
40°
2
Hist. Avg.
68°
40°
3
Hist. Avg.
67°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Vernonia
Vernonia's September 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 37° and 50°. The average high for September is 74° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Vernonia. See also: October | November | December.
