Monthly Climate
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Best time to visit Phnom Penh

December is the best time to visit Phnom Penh for general sightseeing, with average highs of 31 °C and about 5 wet days. The comfortable season runs roughly December to February.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking December comfort 72/100
The least cloud February 46 % average cloud cover
The least rain February 8 mm
Warmth April 35 °C
Cooler weather October 30 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 December 72 31 °C 5
2 January 70 32 °C 3
3 February 65 33 °C 2
4 November 61 30 °C 11
5 March 57 35 °C 6
6 October 46 30 °C 25
7 April 44 35 °C 14
8 September 44 31 °C 27
9 August 42 32 °C 25
10 July 42 32 °C 25
11 June 40 32 °C 24
12 May 37 34 °C 23

When to think twice

May scores lowest with about 23 wet days and highs near 34 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 31.7 °C 15 mm 54 %
February 33.3 °C 8 mm 46 %
March 34.6 °C 39 mm 50 %
April 34.7 °C 88 mm 61 %
May 33.6 °C 154 mm 80 %
June 32.4 °C 156 mm 85 %
July 31.8 °C 156 mm 86 %
August 31.7 °C 179 mm 88 %
September 31.0 °C 248 mm 89 %
October 30.3 °C 247 mm 81 %
November 30.3 °C 77 mm 65 %
December 30.5 °C 27 mm 63 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.