S
M
T
W
T
F
S
30
83°
56°
31
84°
57°
1
82°
52°
2
81°
51°
3
81°
52°
4
79°
54°
5
77°
49°
6
76°
55°
7
79°
56°
8
82°
58°
9
83°
56°
10
75°
48°
11
73°
49°
12
80°
52°
13
81°
56°
14
82°
55°
15
81°
52°
16
76°
47°
17
73°
48°
18
77°
51°
19
80°
52°
20
Hist. Avg.
76°
49°
21
Hist. Avg.
76°
49°
22
Hist. Avg.
76°
49°
23
Hist. Avg.
76°
48°
24
Hist. Avg.
75°
48°
25
Hist. Avg.
75°
48°
26
Hist. Avg.
74°
48°
27
Hist. Avg.
74°
47°
28
Hist. Avg.
74°
47°
29
Hist. Avg.
73°
47°
30
Hist. Avg.
73°
47°
1
Hist. Avg.
72°
46°
2
Hist. Avg.
72°
46°
3
Hist. Avg.
71°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Tualatin
Tualatin's September 2026 forecast shows daily high temperatures ranging from 73° to 84°, with overnight lows between 47° and 58°. The average high for September is 79° with an average low of 53°. 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.
