Cambodia Phnom Penh Weather in October — Climate Guide
October in Phnom Penh is high
October is high for Phnom Penh.
October is the transition month — monsoon ends + dry season begins + Pchum Ben tail. Rainfall stays high at 240mm + 17 rainy days for first half then drops sharply late month. Days cool from 32°C → 31°C with nights at 24°C / 75°F. Royal Palace + Mekong + colonial walking start returning to photogenic quality late October. Pricing window: boutique $40-90/night first half of October; climbs to $60-130 by month-end as November Water Festival approaches. Target October 16-31 for the best value + improving weather combo. Late October sees the Pchum Ben tail (wat ceremonies finishing for the year) and the start of dry-season clear-blue-sky days. Last value month before the November Water Festival + Christmas-New Year double-peak.
Travel score
Monsoon ends + dry season transition + value window
October Weather at a Glance
October averages 88°F / 31°C highs and 75°F / 24°C lows with 17 rainy days and 240mm of rain — late monsoon. Humidity 80%. UV 9. Sunshine 7 hours. Transitioning toward dry season by month-end.
October Travel Advice
Pchum Ben (early October usually) — pre-dawn wat ceremonies at 05:00-06:30. Target October 16-31 for best weather + still-value pricing. Pricing climbs sharply November 1 — book by mid-October if traveling late-month.
Flying In from Overseas
Tourist arrivals still low — international flight pricing matches September lows. Direct via Bangkok $400-700. European autumn shoulder. Korean autumn break partial overlap.
October Pricing Trends
Last value month: boutique $40-90/night first half, $60-130 late month. Raffles $300-550. Rosewood $280-500. Flights $400-700 via Bangkok. Book by mid-Oct for value before Nov 1 sharp increase.
Phnom Penh October Weather Stats
Avg High
31°C
Avg Low
24°C
Rainy Days
17
240mm total
Sunshine
7h
Daily avg
Humidity
80%
humid
UV Index
9
Very high
Wind
7 km/h
Gusts 18
Sea Temp
29°C
Mekong River clearing slowly
Crowds
Moderate
At attractions
October Sunrise & Sunset
Air Quality
PM2.5
28 μg/m³
PM10
48 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
35°C
Nighttime
24°C
Humidity and wind affect how the actual temperature feels.
Wind
7 km/h
Max gust 18 km/h
Activities Recommended for October
October Travel Pros & Cons
Pros
- Monsoon ends late month — dry season begins
- Pchum Ben cultural tail
- Last value month before November Water Festival
- Mekong + colonial visibility improving
Cons
- First half still has heavy rainy days
- Late October pricing climbs toward Water Festival
- Royal Plowing-equivalent festival absences
October Events & Festivals
- Monsoon ends late month — dry season transition begins
- Pchum Ben (continues from September, finishes early October typically)
- Cambodian Pchum Ben school holiday
- Western Halloween prep
Phnom Penh in October — Full Picture
October is the transition month — monsoon ends + dry season begins + Pchum Ben tail. Rainfall stays high at 240mm + 17 rainy days for first half then drops sharply late month. Days cool from 32°C → 31°C with nights at 24°C / 75°F. Royal Palace + Mekong + colonial walking start returning to photogenic quality late October. Pricing window: boutique $40-90/night first half of October; climbs to $60-130 by month-end as November Water Festival approaches. Target October 16-31 for the best value + improving weather combo. Late October sees the Pchum Ben tail (wat ceremonies finishing for the year) and the start of dry-season clear-blue-sky days. Last value month before the November Water Festival + Christmas-New Year double-peak.
What to Wear & What to Pack
Monsoon tail + dry season transition begins. Quick-dry clothes + packable rain shell still useful. Days 31°C / 88°F + nights 24°C / 75°F start cooling.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
35°C
25°C
7.3/mo
Summer (Jun·Jul·Aug)
32.3°C
25°C
17.7/mo
Autumn (Sep·Oct·Nov)
Current31°C
23.7°C
15/mo
Winter (Dec·Jan·Feb)
31.3°C
22°C
1.7/mo
Phnom Penh Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 31° | 22° | 1d·10mm | 9h | 65% | 9 | Very busy | Peak |
| February (Best) | 33° | 23° | 1d·10mm | 9.5h | 60% | 10 | Very busy | Peak |
| 35° | 24° | 3d·35mm | 9h | 65% | 11 | Busy | Shoulder | |
| 36° | 26° | 6d·75mm | 8.5h | 70% | 12 | Busy | Peak | |
| 34° | 25° | 13d·145mm | 7.5h | 75% | 11 | Moderate | Shoulder | |
| 33° | 25° | 16d·200mm | 6.5h | 80% | 10 | Quiet | Low season | |
| 32° | 25° | 18d·220mm | 6h | 82% | 10 | Moderate | Shoulder | |
| 32° | 25° | 19d·220mm | 6h | 82% | 10 | Moderate | Shoulder | |
| 32° | 25° | 19d·250mm | 6h | 82% | 9 | Quiet | Low season | |
| 31° | 24° | 17d·240mm | 7h | 80% | 9 | Moderate | Low season | |
| November (Best) | 30° | 22° | 9d·100mm | 8h | 70% | 9 | Very busy | Peak |
| December (Best) | 30° | 21° | 3d·25mm | 9h | 65% | 9 | Busy | Peak |
View Other Months
Phnom Penh October Hotel Picks
Frequently Asked Questions
Is October a good time to visit Phnom Penh?
Phnom Penh in October is high. Tourist crowds are moderate and flight/hotel prices are low season.
What's the average temperature in Phnom Penh in October?
Phnom Penh October averages a high of 31°C and a low of 24°C.
Does it rain much in Phnom Penh in October?
Phnom Penh October averages 240mm of rainfall over about 17 rainy days.
What should I wear in Phnom Penh in October?
Monsoon tail + dry season transition begins. Quick-dry clothes + packable rain shell still useful. Days 31°C / 88°F + nights 24°C / 75°F start cooling.
What time are sunrise and sunset in Phnom Penh in October?
Phnom Penh October sunrise is 05:55 and sunset is 17:35, with 11h 40min of daylight.
What's the air quality like in Phnom Penh in October?
Phnom Penh October air quality (AQI) averages 55, rated Moderate. PM2.5 averages 28μg/m³.
What activities are recommended in Phnom Penh in October?
In October, Phnom Penh is great for Royal Palace mornings, Mekong sunset cruise (calmer water), Colonial downtown walking.
Is October peak season in Phnom Penh?
Phnom Penh October crowds are moderate and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit Phnom Penh
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.