S
M
T
W
T
F
S
26
99°
82°
27
100°
80°
28
98°
82°
29
98°
81°
30
98°
81°
1
99°
81°
2
96°
81°
3
95°
78°
4
97°
78°
5
96°
80°
6
98°
81°
7
98°
82°
8
92°
81°
9
98°
80°
10
99°
81°
11
98°
81°
12
95°
82°
13
97°
81°
14
98°
81°
15
98°
81°
16
98°
82°
17
97°
82°
18
95°
81°
19
93°
81°
20
94°
81°
21
95°
80°
22
96°
80°
23
98°
80°
24
97°
81°
25
99°
81°
26
99°
81°
27
99°
82°
28
99°
81°
29
95°
81°
30
95°
80°
31
95°
81°
1
96°
80°
2
95°
80°
3
96°
81°
4
95°
80°
5
95°
81°
6
94°
80°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Siem Reap
Siem Reap's May 2026 forecast shows daily high temperatures ranging from 94° to 99°, with overnight lows between 80° and 82°. The average high for May is 96° with an average low of 81°. 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 Siem Reap. See also: June | July | August.
