Annual mean 29°C · wettest around October · prevailing wind S
Warmest
35.0 °C
Coldest
28.8 °C
Wettest
10%
Windiest
3.6 m/s
Prevailing
S
2.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Phnom Penh over the whole year is 29°C. April is the hottest month, with highs of about 34°C; January is the coldest, with lows of about 23°C. The rainy (wet) season in Phnom Penh runs from September to November, peaking in October with a 16% chance of rain on a given day. The dry season is December to June; March is the driest month, at 1%. Winds in Phnom Penh are highest in July, averaging 2.3 m/s (8 km/h), and lightest in October, at 1.4 m/s (5 km/h). The prevailing wind is from the S. The clearest skies in Phnom Penh come in February, when the sky is typically 32% covered; September is the cloudiest month, at 58%.
Month by month Phnom Penh climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
30°C
23°C
30°C
2%
34%
1.8 m/s
36
64
9
February
31°C
24°C
32°C
1%
32%
1.9 m/s
21
55
3
March
33°C
25°C
34°C
1%
35%
2.0 m/s
13
39
1
April
34°C
27°C
36°C
2%
43%
2.0 m/s
8
29
0
May
34°C
27°C
36°C
6%
51%
1.8 m/s
9
25
1
June
33°C
27°C
35°C
8%
54%
2.0 m/s
15
27
3
July
32°C
26°C
34°C
9%
57%
2.3 m/s
19
35
4
August
33°C
27°C
36°C
6%
55%
2.1 m/s
11
32
0
September
31°C
26°C
34°C
13%
58%
1.8 m/s
21
36
4
October
31°C
26°C
34°C
16%
56%
1.4 m/s
21
39
2
November
31°C
25°C
32°C
9%
50%
1.7 m/s
27
47
7
December
30°C
24°C
30°C
2%
42%
2.1 m/s
34
66
8
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Phnom Penh weather by season
Year round, Phnom Penh has days of about 30°C at their warmest in December, its coolest month, and 34°C in April, its warmest; the coolest hours of the day run from 23°C to 27°C through the year, and the average temperature over the year is 29°C around the clock. Rain is most likely around October and least likely around March. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Phnom Penh weather in winterDecember to February
High 30°CLow 24°CRain 2%
Winter in Phnom Penh has typical daily highs of about 30°C and lows of about 24°C, with a 2% chance of rain on a given day.
Phnom Penh weather in springMarch to May
High 34°CLow 27°CRain 3%
Spring in Phnom Penh has typical daily highs of about 34°C and lows of about 27°C, with a 3% chance of rain on a given day.
Phnom Penh weather in summerJune to August
High 32°CLow 27°CRain 8%
Summer in Phnom Penh has typical daily highs of about 32°C and lows of about 27°C, with a 8% chance of rain on a given day.
Phnom Penh weather in autumnSeptember to November
High 31°CLow 26°CRain 13%
Autumn in Phnom Penh has typical daily highs of about 31°C and lows of about 26°C, with a 13% chance of rain on a given day.
When is the rainy season in Phnom Penh?
The rainy (wet) season in Phnom Penh runs from September to November, peaking in October with a 16% chance of rain on a given day. The dry season is December to June; March is the driest month, at 1%.
What time of year is Phnom Penh windiest?
Winds in Phnom Penh are highest in July, averaging 2.3 m/s (8 km/h), and lightest in October, at 1.4 m/s (5 km/h). The prevailing wind is from the S.
What is the average temperature in Phnom Penh year round?
The average temperature in Phnom Penh over the whole year is 29°C. April is the hottest month, with highs of about 34°C; January is the coldest, with lows of about 23°C.