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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 - 12th May 2026

Sunrise 05:38

Sunrise

Sunset 18:16

Sunset
3:00
Partly cloudy
28°C (81°F)
4:00
Clear
28°C (81°F)
5:00
Patchy rain possible
27°C (80°F)
6:00
Patchy rain possible
27°C (80°F)
7:00
Clear
29°C (83°F)
8:00
Clear
30°C (86°F)
9:00
Clear
32°C (89°F)
10:00
Clear
34°C (92°F)
11:00
Partly cloudy
35°C (94°F)
12:00
Cloudy
36°C (96°F)
13:00
Cloudy
37°C (97°F)
14:00
Patchy light drizzle
37°C (97°F)
15:00
Patchy light drizzle
36°C (96°F)
16:00
Patchy rain possible
35°C (95°F)
17:00
Partly cloudy
34°C (93°F)
18:00
Patchy rain possible
33°C (91°F)
19:00
Partly cloudy
33°C (91°F)
20:00
Clear
33°C (91°F)
21:00
Clear
32°C (89°F)
22:00
Clear
31°C (87°F)
23:00
Clear
31°C (86°F)

Tomorrow - 13th May 2026

Sunrise 05:38

Sunrise

Sunset 18:16

Sunset
0:00
Partly cloudy
30°C (85°F)
1:00
Partly cloudy
30°C (85°F)
2:00
Clear
29°C (84°F)