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When to go · Cambodia

Cambodia in September

Avoid month. Wettest month: floods on rural roads and around Tonle Sap; Pchum Ben may fall here or in October.

Key facts

Verdict
Avoid
Crowds
Low
Cambodia
Prices
Low
Cambodia

Verdict

AvoidVoykit month rating for Cambodia

Wettest month: floods on rural roads and around Tonle Sap; Pchum Ben may fall here or in October.

Is another month better than September?

September is rated avoid. These months rate higher:

Weather in September

  • Angkor and the plains · Siem Reap, Phnom Penh, Battambang, Kampong Chamrainy

    Dry and cooler Nov–Feb; April tops 38 °C (100 °F); the green season brings afternoon storms and flooded rural roads, but the moats and rice fields look their best.

  • South coast · Kampot, Kep, Sihanoukville, Koh Rongstorm or typhoon risk

    The southwest monsoon hits the coast hardest Jul–Sep: rough crossings to the islands and some resorts close.

  • North-east highlands · Mondulkiri, Ratanakirirainy

    Cooler nights; red-dirt roads turn to mud in the rains, so plan Nov–Mar.

  • Cardamom and Elephant Mountains: Coast (Kampot, Kep, Sihanoukville, Koh Kong) · Gulf of Thailand shore and islandsrainy

    Dry season roughly November–March; the southwest monsoon brings heavy rain and rougher ferries May–October.

  • Cardamom and Elephant Mountains: Cardamom interior (Pursat, Pailin, Koh Kong hills) · Mountain range and border hillsrainy

    Wettest and muddiest in the monsoon; tracks that are passable in February can be impassable in August.

  • Eastern Cambodia: Mekong lowlands (Kratie, Stung Treng) · river towns and islandsrainy

    Dry and cooler from November to February; April and May are the hottest months, often above 35 °C (95 °F).

  • Eastern Cambodia: Ratanakiri and Mondulkiri hills · Banlung, Senmonorom and the forestsrainy

    Higher and cooler than the lowlands; nights can drop to around 15 °C (59 °F) in December and January. Wet-season mud makes red-earth roads slippery.

  • Mekong Lowlands and Central Plains: Phnom Penh and the plains · Capital and the central lowlandsrainy

    Hot season March–May pushes past 35 °C (95 °F); the wet season June–October brings short heavy afternoon downpours and flooded side roads. November–February is the comfortable window.

  • North-western Cambodia: Siem Reap and the plains · Siem Reap, Sisophon, Tonle Sap shorerainy

    Nov–Feb is dry and cooler; Mar–May tops 35 °C (95 °F); the wet season runs roughly May–Oct with afternoon downpours.

  • North-western Cambodia: Dangrek Mountains and border · Anlong Veng, Samraong, Preah Vihearrainy

    Cooler and wetter than the plains; dirt roads to remote temples can be impassable in the wet season.

  • Siem Reap31 °C (88 °F) / 24 °C (75 °F), 19 rain days
  • Anlong Veng31 °C (88 °F) / 24 °C (75 °F), 20 rain days
  • Banlung30 °C (86 °F) / 22 °C (72 °F), 21 rain days
  • Banteay Chhmar31 °C (88 °F) / 24 °C (75 °F), 19 rain days
  • Chi Phat32 °C (90 °F) / 24 °C (75 °F), 17 rain days
  • Chlong31 °C (88 °F) / 24 °C (75 °F), 16 rain days
  • Doun Kaev33 °C (91 °F) / 25 °C (77 °F), 12 rain days
  • Kampong Cham31 °C (88 °F) / 24 °C (75 °F), 19 rain days
  • Kampong Speu32 °C (90 °F) / 24 °C (75 °F), 18 rain days
  • Kampong Thom32 °C (90 °F) / 25 °C (77 °F), 10 rain days
  • Kampot31 °C (88 °F) / 24 °C (75 °F), 20 rain days
  • Kep31 °C (88 °F) / 24 °C (75 °F), 19 rain days
  • Koh Ker33 °C (91 °F) / 26 °C (79 °F), 12 rain days
  • Koh Kong31 °C (88 °F) / 27 °C (81 °F), 13 rain days
  • Koh Rong32 °C (90 °F) / 27 °C (81 °F), 11 rain days
  • Koh Rong Sanloem33 °C (91 °F) / 26 °C (79 °F), 13 rain days
  • Koh Russei33 °C (91 °F) / 26 °C (79 °F), 12 rain days
  • Kratie31 °C (88 °F) / 24 °C (75 °F), 21 rain days
  • Pailin33 °C (91 °F) / 26 °C (79 °F), 11 rain days
  • Poipet31 °C (88 °F) / 24 °C (75 °F), 19 rain days
  • Pursat33 °C (91 °F) / 25 °C (77 °F), 11 rain days
  • Samraong33 °C (91 °F) / 26 °C (79 °F), 13 rain days
  • Senmonorom29 °C (84 °F) / 21 °C (70 °F), 22 rain days
  • Sisophon32 °C (90 °F) / 25 °C (77 °F), 10 rain days
  • Stung Treng31 °C (88 °F) / 24 °C (75 °F), 21 rain days
  • Tatai32 °C (90 °F) / 24 °C (75 °F), 21 rain days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Constitution Day

    24 Sep

    Public holiday.

  • Pchum Ben (Ancestors' Day) big impact

    Sep–Oct, 3 days (lunar — check)

    Families return to home villages; pagodas crowded at dawn; buses full and many businesses shut.

Crowds and prices

Crowds · Cambodia
Low
Prices · Cambodia
Low

Compare two months

Weather, crowds and prices for any two months in Cambodia, side by side.

  • Verdict

    Sep: Avoid

    Jan: Great (better)

  • Crowds

    Sep: Low

    Jan: High

  • Prices

    Sep: Low

    Jan: High

  • Festivals listed

    Sep: 2

    Jan: 4

September: Wettest month: floods on rural roads and around Tonle Sap; Pchum Ben may fall here or in October.

January: Dry and warm, cool mornings: the best Angkor month. Book Siem Reap beds early.

Cambodia: figures are long-term averages from this guide, not a forecast.

What to pack

  • A rain jacket or umbrella and shoes that dry fast
  • A spare day in the plan: storms can cancel flights and ferries

Build the full packing list for your trip →

Where to go in September

Better another month

  • South coast

    The southwest monsoon hits the coast hardest Jul–Sep: rough crossings to the islands and some resorts close.