Cambodia · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Phnom Penh are January, February and December, when daytime temperatures are agreeable and rainfall is relatively low.
Phnom Penh sees its warmest weather in April, when daytime highs average around 35°C, and its coolest in November (around 30°C).
Annual precipitation totals roughly 1396mm — September is typically the wettest month (~256mm) and February the driest (~4mm).
A distinctly wetter period runs from May to November — worth planning around if you prefer dry days.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 60 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 32° / 22°C | 10mm | 👍 Good |
| February | 33° / 23°C | 4mm | 👍 Good |
| March | 34° / 25°C | 35mm | 🤔 Fair |
| April | 35° / 26°C | 74mm | 🤔 Fair |
| May | 34° / 26°C | 119mm | 🤔 Fair |
| June | 33° / 25°C | 150mm | ⚠️ Challenging |
| July | 32° / 25°C | 164mm | ⚠️ Challenging |
| August | 32° / 25°C | 199mm | ⚠️ Challenging |
| September | 31° / 24°C | 256mm | ⚠️ Challenging |
| October | 30° / 24°C | 251mm | ⚠️ Challenging |
| November | 30° / 23°C | 113mm | 🤔 Fair |
| December | 30° / 22°C | 21mm | 👍 Good |
January in Phnom Penh is hot, with average daytime highs around 32°C (89°F) and nighttime lows near 22°C (72°F). Expect roughly 10mm of precipitation, and rain is rare.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
February in Phnom Penh is hot, with average daytime highs around 33°C (91°F) and nighttime lows near 23°C (74°F). Expect roughly 4mm of precipitation, and rain is rare.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
March in Phnom Penh is hot, with average daytime highs around 34°C (94°F) and nighttime lows near 25°C (76°F). Expect roughly 35mm of precipitation, with little rainfall.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
April in Phnom Penh is hot, with average daytime highs around 35°C (95°F) and nighttime lows near 26°C (78°F). Expect roughly 74mm of precipitation, with a moderate amount of rain.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
May in Phnom Penh is hot, with average daytime highs around 34°C (92°F) and nighttime lows near 26°C (78°F). Expect roughly 119mm of precipitation, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
June in Phnom Penh is hot, with average daytime highs around 33°C (91°F) and nighttime lows near 25°C (77°F). Expect roughly 150mm of precipitation, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
July in Phnom Penh is hot, with average daytime highs around 32°C (90°F) and nighttime lows near 25°C (77°F). Expect roughly 164mm of precipitation, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
August in Phnom Penh is hot, with average daytime highs around 32°C (89°F) and nighttime lows near 25°C (76°F). Expect roughly 199mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
September in Phnom Penh is hot, with average daytime highs around 31°C (88°F) and nighttime lows near 24°C (76°F). Expect roughly 256mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
October in Phnom Penh is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 24°C (75°F). Expect roughly 251mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
November in Phnom Penh is hot, with average daytime highs around 30°C (86°F) and nighttime lows near 23°C (74°F). Expect roughly 113mm of precipitation, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
December in Phnom Penh is hot, with average daytime highs around 30°C (86°F) and nighttime lows near 22°C (72°F). Expect roughly 21mm of precipitation, with little rainfall.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle