S
M
T
W
T
F
S
30
75°
46°
31
85°
52°
1
68°
57°
2
64°
55°
3
63°
54°
4
65°
53°
5
73°
53°
6
64°
56°
7
73°
52°
8
83°
54°
9
88°
56°
10
77°
49°
11
69°
50°
12
69°
51°
13
75°
50°
14
78°
51°
15
79°
50°
16
78°
53°
17
77°
52°
18
75°
53°
19
77°
52°
20
76°
49°
21
70°
52°
22
69°
48°
23
69°
48°
24
70°
47°
25
70°
53°
26
68°
51°
27
68°
48°
28
69°
45°
29
66°
43°
30
68°
43°
1
75°
50°
2
76°
49°
3
75°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tualatin
Tualatin's September 2026 forecast shows daily high temperatures ranging from 66° to 88°, with overnight lows between 43° and 56°. The average high for September is 74° with an average low of 50°. 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 Tualatin. See also: October | November | December.
