S
M
T
W
T
F
S
30
70°
55°
31
71°
54°
1
71°
53°
2
72°
53°
3
71°
59°
4
71°
56°
5
74°
52°
6
70°
51°
7
69°
54°
8
70°
58°
9
69°
58°
10
71°
56°
11
71°
54°
12
66°
53°
13
69°
58°
14
73°
58°
15
Hist. Avg.
71°
50°
16
Hist. Avg.
71°
49°
17
Hist. Avg.
70°
49°
18
Hist. Avg.
70°
48°
19
Hist. Avg.
70°
48°
20
Hist. Avg.
69°
48°
21
Hist. Avg.
69°
47°
22
Hist. Avg.
68°
47°
23
Hist. Avg.
68°
46°
24
Hist. Avg.
68°
46°
25
Hist. Avg.
67°
46°
26
Hist. Avg.
67°
45°
27
Hist. Avg.
66°
45°
28
Hist. Avg.
66°
45°
29
Hist. Avg.
66°
44°
30
Hist. Avg.
65°
44°
1
Hist. Avg.
65°
43°
2
Hist. Avg.
64°
43°
3
Hist. Avg.
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Newcastle
Newcastle's September 2026 forecast shows daily high temperatures ranging from 66° to 74°, with overnight lows between 51° and 59°. The average high for September is 71° with an average low of 55°. 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 Newcastle. See also: October | November | December.
