S
M
T
W
T
F
S
30
76°
42°
31
89°
47°
1
85°
57°
2
70°
48°
3
55°
41°
4
62°
38°
5
68°
42°
6
58°
47°
7
67°
48°
8
76°
42°
9
85°
47°
10
87°
53°
11
77°
54°
12
83°
45°
13
61°
45°
14
68°
46°
15
73°
42°
16
75°
47°
17
67°
47°
18
73°
42°
19
77°
43°
20
82°
49°
21
83°
51°
22
79°
52°
23
72°
42°
24
88°
57°
25
66°
36°
26
64°
40°
27
67°
36°
28
70°
39°
29
72°
42°
30
71°
41°
1
68°
40°
2
59°
37°
3
62°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in John Day
John Day's September 2026 forecast shows daily high temperatures ranging from 59° to 88°, with overnight lows between 36° and 57°. The average high for September is 69° with an average low of 41°. 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 John Day. See also: October | November | December.
