S
M
T
W
T
F
S
26
96°
79°
27
95°
78°
28
96°
77°
29
93°
76°
30
94°
76°
1
92°
77°
2
92°
77°
3
93°
76°
4
92°
76°
5
93°
77°
6
92°
77°
7
93°
76°
8
92°
76°
9
91°
75°
10
91°
76°
11
92°
76°
12
91°
77°
13
92°
76°
14
91°
76°
15
92°
77°
16
91°
78°
17
93°
77°
18
94°
74°
19
94°
74°
20
94°
76°
21
94°
76°
22
92°
75°
23
94°
76°
24
93°
75°
25
94°
76°
26
92°
76°
27
92°
75°
28
91°
75°
29
92°
76°
30
91°
75°
31
93°
77°
1
92°
75°
2
93°
76°
3
92°
75°
4
90°
75°
5
92°
74°
6
92°
75°
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 90° to 96°, with overnight lows between 74° and 79°. The average high for May is 93° 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.
