S
M
T
W
T
F
S
26
60°
41°
27
71°
37°
28
56°
44°
29
56°
50°
30
60°
40°
1
61°
32°
2
54°
37°
3
61°
36°
4
73°
33°
5
80°
52°
6
66°
51°
7
65°
44°
8
63°
36°
9
60°
47°
10
64°
47°
11
62°
40°
12
67°
32°
13
65°
51°
14
56°
45°
15
67°
43°
16
79°
58°
17
82°
57°
18
88°
64°
19
91°
62°
20
77°
53°
21
69°
47°
22
67°
48°
23
70°
47°
24
75°
52°
25
74°
54°
26
78°
58°
27
83°
51°
28
73°
54°
29
69°
55°
30
70°
56°
31
72°
52°
1
70°
50°
2
70°
49°
3
69°
49°
4
71°
50°
5
73°
58°
6
80°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Northumberland
Northumberland's May 2026 forecast shows daily high temperatures ranging from 56° to 91°, with overnight lows between 43° and 64°. The average high for May is 74° 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 May weather will actually feel in Northumberland. See also: June | July | August.
