When to go · Cambodia

When to go to Siem Reap

Twelve months of averages for Siem Reap, and what they say about when to go.

When to go

What the averages say

Mean daily highs and lows and the month's rain, averaged over 2001 to 2020.

On these averages, Siem Reap has a mean high between 18°C and 32°C and under 150 mm of rain in October and November.

Hot months (a mean high of 32°C or more): December to June.
Wet months (150 mm of rain or more): June to September.
Humid months (a high of 25°C or more with relative humidity of 70% or more): May to November.
The warmest month is March (36°C) and the coolest September (30°C). The wettest is September (231 mm) and the driest December (7 mm); about 1,262 mm of rain falls in a year.

How these sentences are worded

Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.

Siem Reap: highs, lows and rainHighLowRain

The year at a glance

Mild to warm and dry
Mild to warm, humid or showery
Hot
Cool
Wet
Cold

JanHot
FebHot
MarHot
AprHot
MayHot
JunWet
JulWet
AugWet
SeptWet
OctMild–warm, mixed
NovMild–warm, mixed
DecHot

Month by month

Every month in Siem Reap

The whole year, with humidity, cloud and the sunlight reaching the ground.

Climate in Siem Reap by month: mean daily high and low, rain, and what the month is like
Month	High	Low	Rain	Humidity	Cloud	Sunlight (kWh/m²/day)	High in Dubai	What it is like
January	33°C	21°C	12 mm	57%	43%	5	23°C	Hot
February	36°C	23°C	16 mm	53%	39%	5.3	24°C	Hot
March	36°C	25°C	46 mm	57%	61%	5.4	27°C	Hot
April	36°C	26°C	75 mm	64%	70%	5.8	31°C	Hot
May	34°C	25°C	140 mm	75%	83%	5.7	35°C	Hot
June	32°C	25°C	168 mm	82%	86%	5.4	37°C	Wet
July	30°C	24°C	197 mm	85%	88%	5.2	39°C	Wet
August	30°C	24°C	195 mm	86%	90%	5	39°C	Wet
September	30°C	24°C	231 mm	87%	90%	4.8	37°C	Wet
October	31°C	23°C	138 mm	84%	75%	4.8	34°C	Mild to warm, humid or showery
November	31°C	22°C	37 mm	78%	60%	4.8	29°C	Mild to warm, humid or showery
December	32°C	20°C	7 mm	65%	52%	4.8	25°C	Hot

The Dubai column is Dubai's mean daily high, for comparison.

Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.

When to go nearby

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Plan a trip to Siem Reap

Tell us when and who is travelling, and a person puts the flights, the stays and the rest into one quote.

Plan a trip to Siem Reap More about Siem Reap When to go

Month

High

Low

Rain

Humidity

Cloud

Sunlight (kWh/m²/day)

High in Dubai

What it is like

January

33°C

21°C

12 mm

57%

43%

23°C

Hot

February

36°C

23°C

16 mm

53%

39%

5.3

24°C

Hot

March

36°C

25°C

46 mm

57%

61%

5.4

27°C

Hot

April

36°C

26°C

75 mm

64%

70%

5.8

31°C

Hot

May

34°C

25°C

140 mm

75%

83%

5.7

35°C

Hot

June

32°C

25°C

168 mm

82%

86%

5.4

37°C

Wet

July

30°C

24°C

197 mm

85%

88%

5.2

39°C

Wet

August

30°C

24°C

195 mm

86%

90%

39°C

Wet

September

30°C

24°C

231 mm

87%

90%

4.8

37°C

Wet

October

31°C

23°C

138 mm

84%

75%

4.8

34°C

Mild to warm, humid or showery

November

31°C

22°C

37 mm

78%

60%

4.8

29°C

Mild to warm, humid or showery

December

32°C

20°C

7 mm

65%

52%

4.8

25°C

Hot