S
M
T
W
T
F
S
26
93°
76°
27
94°
77°
28
95°
78°
29
96°
77°
30
95°
77°
1
95°
76°
2
94°
79°
3
96°
79°
4
96°
78°
5
95°
77°
6
91°
76°
7
88°
75°
8
90°
75°
9
92°
76°
10
91°
75°
11
91°
76°
12
92°
77°
13
91°
76°
14
91°
76°
15
92°
77°
16
91°
76°
17
92°
76°
18
91°
77°
19
92°
76°
20
90°
76°
21
90°
75°
22
91°
76°
23
92°
76°
24
93°
75°
25
93°
77°
26
94°
75°
27
94°
75°
28
93°
77°
29
94°
76°
30
91°
74°
31
92°
75°
1
92°
76°
2
90°
75°
3
90°
74°
4
91°
74°
5
90°
75°
6
90°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Phnom Penh
Phnom Penh's May 2026 forecast shows daily high temperatures ranging from 88° to 96°, with overnight lows between 74° and 79°. The average high for May is 92° with an average low of 76°. 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 Phnom Penh. See also: June | July | August.
