Cambodia’s
Weather
The
weather in Cambodia
Cambodia’s climate is tropical, so there is plenty of rain
during the south-west monsoon season. Rain is a possibility
at any time from May to November, but the serious rain falls
in September and October. The wind that brings the rain
reverses during the winter to create a ‘dry’, or more accurately,
a drier season from December to April – the only months
that are nearly rain-free are January and February.
Temperature
and humidity
There is little seasonal temperature variation, only about
6˚C, but both temperatures and rainfall decline the further
inland you travel. Humidity varies quite a bit, averaging
between 70% and 80%, but somewhat lower in the Ton Le Sap
basin.
Rainfall
The amount of rainfall increases with altitude, reaching a
peak around 5,000cm on the southeast mountains and the slopes
of the Annamite mountain range in the south west. In lowland
areas, rainfall averages around 1,500cm per annum. Between
70% and 80% of total rainfall is carried by the south-west
monsoon.
Extreme
weather
Tropical cyclones, better known as typhoons, are the only
manifestation of severe weather conditions in Cambodia. However,
they’re a rare occurrence, and seldom cause significant damage.
| Phnom
Penh's weather |
Jan |
Feb |
Mar |
Apr |
May |
June |
July |
Aug |
Sept |
Oct |
Nov |
Dec |
| Mean
high temperature (˚C) |
31 |
32 |
33 |
34 |
33 |
32 |
32 |
31 |
31 |
30 |
30 |
29 |
| Mean
high temperature (˚F) |
88 |
90 |
93 |
93 |
92 |
90 |
89 |
89 |
88 |
86 |
86 |
85 |
| Mean
low temperature (˚C) |
88 |
90 |
93 |
93 |
92 |
90 |
89 |
89 |
88 |
86 |
86 |
85 |
| Mean
low temperature (˚F) |
73 |
74 |
77 |
79 |
80 |
78 |
78 |
78 |
77 |
77 |
76 |
73 |
| Rainfall
in millimetres |
112 |
38 |
23 |
84 |
64 |
76 |
84 |
117 |
373 |
584 |
368 |
224 |
| Rainfall
in inches |
4.4 |
1.5 |
0.9 |
1.1 |
2.5 |
3.0 |
3.3 |
4.6 |
14.7 |
23.0 |
14.5 |
8.8 |
| Average
number of rainy days |
0.7 |
0.9 |
3.1 |
5 |
5.5 |
10.4 |
10.6 |
10.7 |
11.9 |
12.7 |
8.8 |
3.3 |
| Siem
Reap's weather |
Jan |
Feb |
Mar |
Apr |
May |
June |
July |
Aug |
Sept |
Oct |
Nov |
Dec |
| Mean
high temperature (˚C) |
31 |
32 |
33 |
34 |
33 |
32 |
31 |
31 |
30 |
30 |
30 |
30 |
| Mean
high temperature (˚F) |
88 |
90 |
93 |
94 |
93 |
91 |
89 |
89 |
87 |
87 |
87 |
86 |
| Mean
low temperature (˚C) |
19 |
21 |
23 |
24 |
24 |
24 |
23 |
23 |
23 |
22 |
21 |
19 |
| Mean
low temperature (˚F) |
67 |
70 |
74 |
76 |
76 |
76 |
75 |
75 |
75 |
73 |
71 |
67 |
| Rainfall
in millimetres |
n/a |
10 |
20 |
60 |
140 |
170 |
200 |
200 |
260 |
230 |
80 |
10 |
| Rainfall
in inches |
0.1 |
0.5 |
1 |
2.5 |
5.9 |
7 |
7.9 |
7.9 |
10.6 |
9.3 |
3.4 |
0.6 |
| Average
number of rainy days |
0.3 |
1.1 |
2.4 |
4.5 |
5.5
|
11.6 |
12.5 |
12.5 |
13.2 |
12.2 |
6.5 |
1.3 |
|
