S
M
T
W
T
F
S
30
83°
58°
31
81°
53°
1
79°
52°
2
75°
53°
3
75°
53°
4
76°
54°
5
75°
52°
6
74°
52°
7
74°
53°
8
75°
54°
9
74°
53°
10
72°
51°
11
74°
51°
12
75°
53°
13
73°
52°
14
74°
51°
15
72°
52°
16
73°
50°
17
72°
49°
18
72°
50°
19
Hist. Avg.
75°
56°
20
Hist. Avg.
74°
55°
21
Hist. Avg.
74°
55°
22
Hist. Avg.
74°
54°
23
Hist. Avg.
73°
54°
24
Hist. Avg.
73°
54°
25
Hist. Avg.
72°
53°
26
Hist. Avg.
72°
53°
27
Hist. Avg.
72°
52°
28
Hist. Avg.
71°
52°
29
Hist. Avg.
71°
52°
30
Hist. Avg.
70°
51°
1
Hist. Avg.
70°
51°
2
Hist. Avg.
70°
50°
3
Hist. Avg.
69°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Newfoundland
Newfoundland's September 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 49° and 58°. The average high for September is 75° with an average low of 52°. 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 Newfoundland. See also: October | November | December.
