S
M
T
W
T
F
S
26
41°
32°
27
45°
32°
28
50°
30°
29
54°
28°
30
54°
27°
1
63°
31°
2
74°
42°
3
68°
42°
4
57°
32°
5
46°
28°
6
49°
34°
7
59°
44°
8
66°
45°
9
64°
44°
10
63°
43°
11
67°
47°
12
77°
50°
13
69°
45°
14
68°
46°
15
66°
43°
16
70°
48°
17
69°
49°
18
71°
48°
19
61°
47°
20
63°
47°
21
61°
40°
22
64°
47°
23
68°
51°
24
63°
42°
25
61°
41°
26
63°
44°
27
64°
48°
28
62°
47°
29
62°
47°
30
64°
45°
31
66°
48°
1
72°
53°
2
76°
54°
3
77°
55°
4
78°
56°
5
79°
56°
6
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Newcastle
Newcastle's May 2026 forecast shows daily high temperatures ranging from 46° to 79°, with overnight lows between 28° and 56°. The average high for May is 66° with an average low of 46°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Newcastle. See also: June | July | August.
