S
M
T
W
T
F
S
30
71°
45°
31
81°
45°
1
83°
57°
2
72°
53°
3
65°
50°
4
64°
48°
5
70°
43°
6
72°
46°
7
67°
51°
8
72°
52°
9
79°
48°
10
79°
55°
11
70°
45°
12
73°
51°
13
60°
46°
14
65°
45°
15
64°
47°
16
73°
47°
17
79°
47°
18
78°
49°
19
79°
46°
20
80°
49°
21
84°
49°
22
77°
52°
23
69°
45°
24
77°
44°
25
60°
39°
26
60°
39°
27
63°
37°
28
64°
43°
29
67°
47°
30
67°
45°
1
68°
42°
2
62°
39°
3
66°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Medical Lake
Medical Lake's September 2026 forecast shows daily high temperatures ranging from 60° to 68°, with overnight lows between 37° and 47°. The average high for September is 64° with an average low of 42°. 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 Medical Lake. See also: October | November | December.
