S
M
T
W
T
F
S
30
68°
55°
31
64°
57°
1
66°
57°
2
72°
57°
3
68°
59°
4
66°
55°
5
64°
54°
6
70°
59°
7
64°
54°
8
64°
52°
9
61°
54°
10
66°
57°
11
64°
55°
12
68°
55°
13
63°
57°
14
N/A
15
63°
53°
16
62°
52°
17
61°
52°
18
61°
55°
19
62°
53°
20
62°
58°
21
66°
57°
22
65°
55°
23
65°
54°
24
64°
53°
25
62°
52°
26
63°
53°
27
60°
52°
28
61°
53°
29
62°
53°
30
61°
52°
1
62°
53°
2
63°
53°
3
63°
52°
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 60° to 66°, with overnight lows between 52° and 58°. The average high for September is 63° with an average low of 53°. 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.
