AI-generatedPhnom Penh at a glance
- Best time
- Dec – Jan
- Warmest month
- Apr · 35°
- Sunshine a year
- 2,290 h
- Rain a year
- 1,416 mm
- Climate
- Tropical
- Time zone
- UTC+7
- Elevation
- 20 m
Climate in Phnom Penh
Phnom Penh has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. April is the warmest month with average highs of 35 °C, while November is the coolest at 30 °C. With around 2,290 hours of sunshine a year, Phnom Penh is sunny; February is the sunniest month with 8.0 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Poor
Best time to visit: December – January
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 27°
- Midday, 13:00: about 30°
- Afternoon, 16:00: about 30°
- Evening, 20:00: about 27°
- Night, 23:00: about 26°
05:4917:43
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:36–06:18 · evening 17:14–17:56
- Blue hour
- Morning 05:28–05:36 · evening 17:56–18:04
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Phnom Penh in October?
In October, Phnom Penh is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 25 days, totalling 243 mm. On about 22 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is not an ideal month for a holiday in Phnom Penh.
More details for October
- Daylight
- 11 h 53 min05:49 – 17:43
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 11 km/haverage daily peakAll months
- Cloud cover
- 83 %on averageAll months
- Hot days
- 22 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Phnom_Penh
How the score comes together
- Temperatureweight 50 %58 %
- Sunshineweight 20 %33 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Sunshine hours in Phnom Penh
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.0 of 11.9 hours of daylight in Phnom Penh, 42 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Phnom Penh
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 11 · extremeAvoid the midday sun; SPF 50+, covering clothes, hat and sunglasses.
The sun is strongest in April (UV 13).
Minutes until sunburn in October
- Very fair skin
- about 10 min
- Fair skin
- about 15 min
- Light brown skin
- about 20 min
- Olive skin
- about 25 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Phnom Penh: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Phnom Penh has about 25 rainy days with 243 mm of rain in total.
Wind and clouds in Phnom Penh
How breezy and how cloudy Phnom Penh is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Phnom Penh typically peaks at 11 km/h during the day: Beaufort 2, light air.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 83 % of the sky over Phnom Penh: mostly overcast, with about 5.0 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Phnom Penh
How often the day gets hot in Phnom Penh (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Phnom Penh has about 22 hot days, with an average daytime high of 30 °C: hot and muggy. Plan outdoor activities for the morning and evening, drink a lot and take breaks in the cool.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Phnom Penh
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Warm 20–24°
- Hot 24° and more
- muggy month (10+ muggy days)
HotOctober: nights around 24°. Hot nights: air conditioning makes sleeping much easier. Muggy on about 31 days (dew point 18 °C or more).
The coolest nights are in January (23°), the warmest in April (26°). Nights stay tropical all year (20 °C and more), so a room with air conditioning or at least a fan pays off. It is muggy (dew point 18 °C or more) on about 336 days a year, mostly all year round.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 67 | 32° | 23° | 7.5 h | 3 | 16 |
| FebruaryFeb | 58 | 33° | 24° | 8.0 h | 2 | 11 |
| MarchMar | 45 | 35° | 25° | 7.9 h | 6 | 33 |
| AprilApr | 24 | 35° | 26° | 7.5 h | 15 | 84 |
| MayMay | 21 | 33° | 26° | 6.2 h | 23 | 159 |
| JuneJun | 25 | 32° | 25° | 5.6 h | 24 | 156 |
| JulyJul | 27 | 32° | 25° | 5.0 h | 26 | 162 |
| AugustAug | 27 | 32° | 25° | 5.0 h | 26 | 177 |
| SeptemberSep | 30 | 31° | 25° | 4.5 h | 27 | 247 |
| OctoberOct | 35 | 30° | 24° | 5.0 h | 25 | 243 |
| NovemberNov | 50 | 30° | 24° | 6.2 h | 13 | 96 |
| DecemberDec | 68 | 30° | 23° | 6.8 h | 6 | 32 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
11.56° N, 104.92° E · 20 m · Asia/Phnom_Penh
Best time to visit Phnom Penh
The best time to visit Phnom Penh is from December to January. From February to May it can get very hot, with highs of up to 35 °C. Rain is most frequent from April to November; the wettest month is September with 247 mm.
Phnom Penh through the seasons
How the weather changes over the seasons, with averages for each.
Phnom Penh in the dry season
Dec – Mar
Good
- 30–35 °C by day
- 8 h of sun a day
- 17 rainy days in all
Phnom Penh in the rainy season
Apr – Nov
Poor
- 30–35 °C by day
- 6 h of sun a day
- 180 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Phnom Penh for you.
Your best months: December – February
Based on the climate averages; tap a month to see its details.
Compare two months in Phnom Penh
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
December has the better holiday weather in Phnom Penh: score 68 against 35. Daytime highs are about the same. December has 19 fewer rainy days. The sun shines 2 hours longer a day in December.
| Month | October | December |
|---|---|---|
| Weather score | 35 | 68better |
| Day high | 30° | 30° |
| Night low | 24° | 23° |
| Sunshine | 5.0 h | 6.8 hbetter |
| Rainy days | 25 | 6better |
| Rainfall | 243 mm | 32 mmbetter |
| Muggy days | 31 | 24better |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Peak heat
Feb – May
Highs of 33 °C or more
Rainy months
Apr – Nov
12 or more rainy days
Phnom Penh month by month
The typical weather for every month at a glance.
67January32° · 8 h
In January, Phnom Penh is hot: daytime highs average 32 °C, and even at night it stays warm at around 23 °C. The sun shines for around 8 hours a day. Rain is rare: about 3 days bring 16 mm in total. On about 26 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, January is a good month for a holiday in Phnom Penh.
Phnom Penh in January58February33° · 8 h
In February, Phnom Penh is very hot: daytime highs average 33 °C, and even at night it stays warm at around 24 °C. The sun shines for around 8 hours a day. Rain is rare: about 2 days bring 11 mm in total. On about 28 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, February is a so-so month for a holiday in Phnom Penh.
Phnom Penh in February45March35° · 8 h
In March, Phnom Penh is very hot: daytime highs average 35 °C, and even at night it stays warm at around 25 °C. The sun shines for around 8 hours a day. Rain falls on about 6 days, adding up to 33 mm. On about 31 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is a so-so month for a holiday in Phnom Penh.
Phnom Penh in March24April35° · 8 h
In April, Phnom Penh is very hot: daytime highs average 35 °C, and even at night it stays warm at around 26 °C. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 15 days, totalling 84 mm. On about 30 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, April is not an ideal month for a holiday in Phnom Penh.
Phnom Penh in April21May33° · 6 h
In May, Phnom Penh is very hot: daytime highs average 33 °C, and even at night it stays warm at around 26 °C. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 23 days, totalling 159 mm. On about 30 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is not an ideal month for a holiday in Phnom Penh.
Phnom Penh in May25June32° · 6 h
In June, Phnom Penh is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 24 days, totalling 156 mm. On about 27 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, June is not an ideal month for a holiday in Phnom Penh.
Phnom Penh in June27July32° · 5 h
In July, Phnom Penh is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 26 days, totalling 162 mm. On about 27 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is not an ideal month for a holiday in Phnom Penh.
Phnom Penh in July27August32° · 5 h
In August, Phnom Penh is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 26 days, totalling 177 mm. On about 27 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is not an ideal month for a holiday in Phnom Penh.
Phnom Penh in August30September31° · 5 h
In September, Phnom Penh is hot: daytime highs average 31 °C, and even at night it stays warm at around 25 °C. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 27 days, totalling 247 mm. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is not an ideal month for a holiday in Phnom Penh.
Phnom Penh in September35October30° · 5 h
In October, Phnom Penh is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 25 days, totalling 243 mm. On about 22 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is not an ideal month for a holiday in Phnom Penh.
Phnom Penh in October50November30° · 6 h
In November, Phnom Penh is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. Expect around 6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 96 mm in total. On about 19 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, November is a so-so month for a holiday in Phnom Penh.
Phnom Penh in November68December30° · 7 h
In December, Phnom Penh is hot: daytime highs average 30 °C, and even at night it stays warm at around 23 °C. The sun shines for around 7 hours a day. Rain falls on about 6 days, adding up to 32 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, December is a good month for a holiday in Phnom Penh.
Phnom Penh in DecemberPhnom Penh compared
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Phnom Penh vs. Phu Quoc (Duong Dong)
In October Phu Quoc (Duong Dong) has the better holiday weather (score 50 vs. 35). During the day Phu Quoc (Duong Dong) is 2 °C cooler than Phnom Penh.
| in October | Phnom Penh | Phu Quoc (Duong Dong) |
|---|---|---|
| Holiday score | 35 | 50 |
| Daytime high | 30° | 28° |
| Sea | – | 29° |
| Sunshine | 5 h | 5 h |
| Rainy days | 25 | 26 |
| Best time | Dec – Jan | Dec – Mar |
Through the year
Cambodia in October: the best places
In October, Phnom Penh ranks 2 of 2 destinations in this country.
- Siem Reap (Angkor)30°39
- 2Phnom PenhThis page30°35
Planning a trip to Phnom Penh
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Phnom Penh in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Phnom Penh has its best school-holiday weather during the Christmas holidays (score 68) and its weakest during May half-term (score 22).
- 30
Easter holidays
Mar – Apr
Poor
- 35 °C by day
- 7.6 h of sun a day
- 12 rainy days a month
Keep in mind: Peak heat, Frequent rain
- 22
May half-term
May – Jun
Poor
- 33 °C by day
- 6.1 h of sun a day
- 23 rainy days a month
Keep in mind: Peak heat, Frequent rain
- 27
Summer holidays
Jul – Aug
Poor
- 32 °C by day
- 5.0 h of sun a day
- 26 rainy days a month
Keep in mind: Frequent rain
- 35
October half-term
Oct
Poor
- 30 °C by day
- 5.0 h of sun a day
- 25 rainy days a month
Keep in mind: Frequent rain
- 68
Christmas holidays
Dec – Jan
GoodBest holidays
- 31 °C by day
- 7.2 h of sun a day
- 4 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 12 h 35 min
- Distance
- 10,040 km
- Time zone
- UTC+7
- Jet lag
- About 6 days (6 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Phnom Penh
When is the best time to visit Phnom Penh?
The best time to visit Phnom Penh is from December to January. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Phnom Penh?
April is the warmest month, with average highs of 35 °C and nights around 26 °C. November is the coolest month at 30 °C.
When does it rain most in Phnom Penh?
Rain is most frequent from April to November; the wettest month is September with 247 mm. The driest month is February with 11 mm.
How many hours of sunshine does Phnom Penh get?
Phnom Penh gets around 2,290 hours of sunshine a year. The sunniest month is February with 8.0 hours a day; in September there are 4.5 hours a day.
What time zone is Phnom Penh in?
Phnom Penh uses the time zone Asia/Phnom_Penh, at UTC+7 all year.
How long is the flight from London to Phnom Penh?
A nonstop flight from London to Phnom Penh takes about 12 h 35 min, for a straight-line distance of about 10,040 km. Most routes need a change of planes, which adds time.
Which school holidays are best for Phnom Penh?
Phnom Penh has its best school-holiday weather during the Christmas holidays (score 68) and its weakest during May half-term (score 22). Holiday ratings (0–100): Easter holidays 30, May half-term 22, Summer holidays 27, October half-term 35, Christmas holidays 68.
Near Phnom Penh
Other destinations close by.
Places with a climate like Phnom Penh
Destinations whose weather through the year is closest to Phnom Penh's – good alternatives.