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Phnom Penh, Cambodia Weather Averages

April is the hottest month in Phnom Penh with an average temperature of 31°C (87°F) and the coldest is January at 26°C (79°F) with the most daily sunshine hours at 8 in December. The wettest month is September with an average of 60mm of rain..

Average Temperature Phnom Penh

What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month

Average High Low Temperature Phnom Penh

What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

Average Rainfall Phnom Penh

What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

Average Daily Sunshine Hours Phnom Penh

What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer
What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer

Phnom Penh : Next 24-Hour Weather

Tomorrow - 11th May 2026

Sunrise 05:38

Sunrise

Sunset 18:15

Sunset
3:00
Patchy rain possible
27°C (81°F)
4:00
Patchy rain possible
27°C (80°F)
5:00
Patchy rain possible
27°C (80°F)
6:00
Partly cloudy
27°C (80°F)
7:00
Partly cloudy
29°C (83°F)
8:00
Clear
31°C (87°F)
9:00
Partly cloudy
33°C (90°F)
10:00
Overcast
34°C (93°F)
11:00
Overcast
35°C (95°F)
12:00
Light rain shower
35°C (94°F)
13:00
Patchy rain possible
35°C (94°F)
14:00
Patchy rain possible
35°C (95°F)
15:00
Light drizzle
36°C (95°F)
16:00
Patchy rain possible
35°C (95°F)
17:00
Partly cloudy
35°C (94°F)
18:00
Clear
33°C (91°F)
19:00
Patchy rain possible
31°C (88°F)
20:00
Clear
31°C (86°F)
21:00
Patchy light drizzle
30°C (85°F)
22:00
Clear
30°C (84°F)
23:00
Partly cloudy
29°C (83°F)

Tomorrow - 12th May 2026

Sunrise 05:38

Sunrise

Sunset 18:15

Sunset
0:00
Clear
29°C (83°F)
1:00
Clear
28°C (82°F)
2:00
Partly cloudy
28°C (82°F)