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Siem Reap Weather in May
Siem Reap in May averages 35°C (95°F) during the day and 27°C (81°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Siem Reap in May
Typically, you can expect about 15 days of rain this month, with 168 mm (6.6 in) on average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Siem Reap in May
May in Siem Reap sees highs of 35°C (95°F) and lows of 27°C (81°F) overnight. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. With lows of 27°C (81°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.Our weather planner can help you find worldwide destinations with pleasant weather during this period. December typically offers the best weather for Siem Reap.
Siem Reap Temperature in May
Min Temperature
27°C (81°F)
Max Temperature
35°C (95°F)
Chance of Rain
49%
Precipitation
168 mm (6.6 in)
Rainy days
15 days
Humidity
66%
Siem Reap Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Siem Reap - and find the best time to visit.
Historical weather records for Siem Reap in May
Browse day-by-day weather records for Siem Reap spanning 34 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Siem Reap historical weather extremes in May
Based on 20 years of weather observations (2006-2026), these are the most extreme conditions recorded in Siem Reap.
- On May 2, 2024, temperatures climbed to 41°C (106°F), marking the warmest May day on record.
- Siem Reap experienced its chilliest May day on May 3, 2022, reaching only 24°C (75°F).
- The lowest overnight temperature recorded in May was 21°C (70°F) (May 3, 2022).
- The wettest May day on record brought 109 mm (4.3 in) of precipitation to Siem Reap (May 12, 2008).
Best Places in Cambodia in May
Find out more about the weather in Cambodia and which places have the best travel conditions in this month. See all of Cambodia in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Siem Reap in May
Pack for serious heat in Siem Reap in May. Prioritize clothing that breathes and doesn't cling or stick. Lightweight cotton, linen, and moisture-wicking fabrics are ideal. A wide hat provides welcome shade. It's going to pour! Pack a good poncho and prepare for very wet conditions.
What To Do in Siem Reap in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Siem Reap 3-Day Forecast
More climate data for Siem Reap
See the full Siem Reap climate overview or explore weather in Cambodia.
Popular in May
Where to go in May - average daytime high across popular destinations.
Battambang
37°C (99°F) Phnom Penh
36°C (97°F) Siem Reap35°C (95°F) Chambok33°C (91°F) Kep32°C (90°F) Kampot32°C (90°F) Sihanoukville31°C (88°F) Koh Rong Island30°C (86°F) Bucket list
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