S
M
T
W
T
F
S
30
82°
54°
31
77°
55°
1
78°
52°
2
77°
52°
3
79°
57°
4
86°
58°
5
85°
58°
6
86°
55°
7
84°
56°
8
76°
55°
9
78°
51°
10
76°
50°
11
77°
54°
12
80°
54°
13
75°
56°
14
77°
57°
15
82°
56°
16
83°
45°
17
77°
44°
18
73°
42°
19
70°
45°
20
72°
45°
21
73°
52°
22
79°
55°
23
79°
53°
24
80°
45°
25
77°
41°
26
71°
42°
27
68°
42°
28
69°
40°
29
69°
41°
30
69°
42°
1
Hist. Avg.
71°
48°
2
Hist. Avg.
70°
48°
3
Hist. Avg.
70°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Surprise
Surprise's September 2026 forecast shows daily high temperatures ranging from 68° to 86°, with overnight lows between 40° and 58°. The average high for September is 77° 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 Surprise. See also: October | November | December.
