Climate averages 1991–2020

Weather in Cambodia.

ClimaNote covers 8 cities in Cambodia, starting with Phnom Penh, Takeo and Siem Reap. Open a city for charts and a table of all 12 months, or open a month for a side-by-side comparison of cities in the atlas.

Across these cities the yearly average high ranges from 29.3°C in Sihanoukville to 32.5°C in Battambang, and yearly rainfall from 1,052 mm in Battambang to 3,272 mm in Sihanoukville. The hottest city-month is March in Battambang, with an average high of 35.3°C (tied with April in Battambang), and the coolest is September in Sihanoukville, at 28.0°C. By single month, the most rain falls in July in Sihanoukville, with 558 mm, and the least in December in Paoy Paet, with 5.8 mm.

April is the warmest month in 7 cities (in 1 other city two or more months tie); October is the coolest in 3 cities, November in 2 and September in 1 (in 2 other cities two or more months tie). September is the wettest month in 6 cities, July in 1 and October in 1; February is the driest in 5 cities, January in 2 and December in 1. Of these cities, 1 has a month with more than 300 mm of rain; none has a month with an average high below 2.0°C or a month with under 1 mm of rain.