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Best time to visit Siem Reap

Month-by-month weather averages for Siem Reap.

Siem Reap, Siem Reap, Cambodia

°C

mm

−10°0°10°20°30°40°
0100200300400500
  • Average daily high and low
  • Precipitation
  • Good month
  • Best month
  • Made good or best by an event
Average daily high and low temperature, average precipitation and each month's verdict
MonthAverage daily highAverage daily lowPrecipitationVerdict
January31 °C / 88 °F22.6 °C / 73 °F14 mm / 0.5 ingood month
February32.8 °C / 91 °F24.3 °C / 76 °F16 mm / 0.6 ingood month
March34.4 °C / 94 °F26.3 °C / 79 °F42 mm / 1.7 inneither best nor good
April34.9 °C / 95 °F27.2 °C / 81 °F89 mm / 3.5 inneither best nor good
May34 °C / 93 °F27.4 °C / 81 °F150 mm / 5.9 inneither best nor good
June33.6 °C / 92 °F27.2 °C / 81 °F123 mm / 4.8 inneither best nor good
July32.6 °C / 91 °F26.7 °C / 80 °F149 mm / 5.9 inneither best nor good
August32.6 °C / 91 °F26.6 °C / 80 °F158 mm / 6.2 inneither best nor good
September31.6 °C / 89 °F26.2 °C / 79 °F255 mm / 10 inneither best nor good
October31.3 °C / 88 °F25.6 °C / 78 °F221 mm / 8.7 inneither best nor good
November31.2 °C / 88 °F24.6 °C / 76 °F80 mm / 3.2 inneither best nor good
December30.4 °C / 87 °F22.8 °C / 73 °F18 mm / 0.7 ingood month
Good and best months depend on more than temperature, rain and events. How they are chosen

Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:

  • Daytime highs
  • Night-time lows
  • How warm it feels
  • Humidity
  • How much of the day is sunny
  • Hours of daylight
  • Monthly rainfall
  • How many days it rains
  • Days of heavy rain
  • Wind
  • Snowfall and days with snow
  • Major events, such as festivals

The chart shows the good and best months for exploring outdoors.

The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.

Best months by activity

Exploring outdoors

Mild days and nights, mostly dry and bright. The default for 'when should I go'.

  1. JJanuary: good
  2. FFebruary: good
  3. MMarch: neither
  4. AApril: neither
  5. MMay: neither
  6. JJune: neither
  7. JJuly: neither
  8. AAugust: neither
  9. SSeptember: neither
  10. OOctober: neither
  11. NNovember: neither
  12. DDecember: good
Good
December–February

The cool, dry season from December to February (and to a lesser extent January into early February) gives Siem Reap's mildest and driest conditions for exploring Angkor, though heat and humidity are still present; March's heat turns intense, and April through October are increasingly hot, humid and rain-soaked, peaking in the September-October monsoon.

Why these months

  • January · good

    In its favour: precipitation 14 mm / 0.5 in, share of daylight that is sunny 92%, wet days 2 days, days with heavy rain 0.2 days.

    Against: feels like (high) 34.2 °C / 94 °F, average daily high 31 °C / 88 °F, relative humidity 67%, average daily low 22.6 °C / 73 °F.

    Watch out for: Chinese New Year travel crunch.

  • February · good

    In its favour: precipitation 16 mm / 0.6 in, share of daylight that is sunny 93%, wet days 2.9 days, days with heavy rain 0.3 days.

    Against: feels like (high) 36.8 °C / 98 °F, average daily high 32.8 °C / 91 °F, relative humidity 66%, average daily low 24.3 °C / 76 °F.

    Watch out for: Chinese New Year travel crunch.

  • December · good

    In its favour: precipitation 18 mm / 0.7 in, share of daylight that is sunny 90%, wet days 3 days, days with heavy rain 0.6 days.

    Against: feels like (high) 34.1 °C / 93 °F, average daily high 30.4 °C / 87 °F, relative humidity 71%, average daily low 22.8 °C / 73 °F.

An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Jade Dragon Mountain, 1575 km away.

Weather averages

Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.

  JanFebMarAprMayJunJulAugSepOctNovDec
Feels like (high) 34.2 °C36.8 °C39.6 °C41.2 °C40.7 °C39.5 °C38.1 °C38.4 °C37.8 °C37.4 °C36.3 °C34.1 °C
Days with heavy rain 0.2 days0.3 days1.2 days2.8 days4.4 days3.5 days3.9 days5 days9.6 days7.8 days2.3 days0.6 days
Time rain usually falls 5 am5 am1 am1 am4 pm4 pm4 pm4 pm4 pm5 pm5 pm4 pm
Sunshine per day 10.5 h10.9 h11.3 h11.2 h10.6 h10 h9.1 h9.3 h8.4 h9.2 h10 h10.2 h
Relative humidity 67%66%67%70%76%76%78%79%83%82%77%71%

Air quality

Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.

  JanFebMarAprMayJunJulAugSepOctNovDec
Air pollution (PM2.5) 2022–202516.7 µg/m³22 µg/m³26.1 µg/m³23.4 µg/m³15.2 µg/m³8 µg/m³7.1 µg/m³7 µg/m³7.2 µg/m³9.4 µg/m³9.5 µg/m³8.8 µg/m³
Air pollution (PM2.5, daily peak) 2022–202524.8 µg/m³31.5 µg/m³35 µg/m³31.4 µg/m³20.8 µg/m³11.2 µg/m³10.1 µg/m³10.3 µg/m³11 µg/m³13.4 µg/m³13.7 µg/m³13.1 µg/m³
  • Good 15 µg/m³ or less
  • Fair 15 to 25 µg/m³
  • Moderate 25 to 37.5 µg/m³
  • Poor 37.5 to 50 µg/m³
  • Very poor 50 to 75 µg/m³
  • Extremely poor over 75 µg/m³

Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.

Events and seasons

What the weather records cannot show. A major event can lift a month to good or best. The warnings are there to help you plan, and never count against a month.

Reasons to go

  • Water Festival at Angkor Wat

    October and November, dates vary from year to year

  • Angkor Photography Festival

    24–30 November, dates vary from year to year

Worth knowing before you go

  • Chinese New Year travel crunch

    January and February, dates vary from year to year

World Heritage sites nearby

UNESCO World Heritage sites within 25 km, nearest first.

  • Angkor

    9 km away

Other places in Cambodia

Compare places month by month on the travel calendar

Monthly averages over 2006–2025, unless stated otherwise.

Weather data by Open-Meteo.com (CC-BY 4.0), generated using Copernicus Climate Change Service information (ERA5). City data from GeoNames (CC-BY 4.0). Air quality from the Copernicus Atmosphere Monitoring Service (CAMS) and sea temperature from Météo-France / Copernicus Marine, both via Open-Meteo.com. Coastline from Natural Earth. Ski areas from OpenSkiMap.org, © OpenStreetMap contributors (ODbL) and Skimap.org. World Heritage sites from Wikidata (CC0), from the World Heritage List © UNESCO World Heritage Centre. Readership from Wikimedia pageview data (CC0). Destination classification derived from English Wikivoyage, © Wikivoyage contributors (CC BY-SA 4.0).