S
M
T
W
T
F
S
30
85°
56°
31
87°
52°
1
79°
53°
2
83°
45°
3
78°
49°
4
76°
51°
5
77°
54°
6
85°
49°
7
83°
47°
8
73°
44°
9
73°
43°
10
74°
43°
11
73°
46°
12
75°
44°
13
74°
47°
14
77°
51°
15
77°
52°
16
82°
51°
17
75°
43°
18
70°
50°
19
70°
45°
20
76°
42°
21
77°
41°
22
73°
39°
23
68°
43°
24
73°
40°
25
77°
46°
26
77°
49°
27
Hist. Avg.
74°
49°
28
Hist. Avg.
74°
48°
29
Hist. Avg.
73°
48°
30
Hist. Avg.
72°
48°
1
Hist. Avg.
72°
47°
2
Hist. Avg.
71°
47°
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 Lapwai
Lapwai's September 2026 forecast shows daily high temperatures ranging from 68° to 87°, with overnight lows between 39° and 56°. The average high for September is 77° with an average low of 47°. 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 Lapwai. See also: October | November | December.