S
M
T
W
T
F
S
30
83°
47°
31
85°
43°
1
86°
44°
2
90°
49°
3
90°
45°
4
88°
42°
5
80°
45°
6
83°
43°
7
82°
40°
8
79°
41°
9
79°
39°
10
78°
41°
11
82°
40°
12
83°
39°
13
82°
46°
14
84°
46°
15
84°
38°
16
79°
35°
17
74°
35°
18
73°
34°
19
72°
35°
20
74°
36°
21
76°
44°
22
81°
42°
23
77°
43°
24
72°
41°
25
71°
36°
26
73°
33°
27
69°
32°
28
68°
34°
29
69°
34°
30
70°
35°
1
Hist. Avg.
71°
42°
2
Hist. Avg.
70°
41°
3
Hist. Avg.
70°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ephraim
Ephraim's September 2026 forecast shows daily high temperatures ranging from 68° to 90°, with overnight lows between 32° and 49°. The average high for September is 79° with an average low of 40°. 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 Ephraim. See also: October | November | December.