S
M
T
W
T
F
S
26
68°
43°
27
70°
46°
28
61°
43°
29
64°
45°
30
69°
50°
1
70°
48°
2
67°
46°
3
62°
44°
4
64°
44°
5
61°
42°
6
60°
43°
7
61°
44°
8
56°
41°
9
55°
40°
10
56°
45°
11
60°
44°
12
57°
43°
13
57°
44°
14
58°
47°
15
59°
48°
16
62°
48°
17
61°
45°
18
62°
49°
19
66°
50°
20
66°
50°
21
67°
51°
22
66°
51°
23
67°
49°
24
66°
50°
25
66°
50°
26
64°
49°
27
60°
47°
28
60°
48°
29
61°
48°
30
63°
51°
31
66°
51°
1
67°
50°
2
67°
52°
3
68°
51°
4
67°
51°
5
67°
50°
6
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Farnham
Farnham's May 2026 forecast shows daily high temperatures ranging from 55° to 70°, with overnight lows between 40° and 52°. The average high for May is 63° with an average low of 47°. 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 Farnham. See also: June | July | August.