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Siem Reap Weather in January
Siem Reap in January sees very high temperatures, with highs around 33°C (91°F) and overnight lows of 22°C (72°F). It's the driest month of the year, with very little rainfall to worry about.
Rainfall in Siem Reap in January
This is the driest month of the year. Climate statistics over the past 30 years suggest around a single day of rain, with 9.8 mm (0.4 in) average for the month. If rain does fall, it tends to arrive as a fairly heavy shower rather than light drizzle.
Temperature in Siem Reap in January
Weather in Siem Reap is at its excellent in January. Highs reach 33°C (91°F), while nights settle around 22°C (72°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. At 22°C (72°F) overnight, nights are warm enough to sit outside comfortably in light clothing.If your ideal day consists of dry skies and pleasant temperatures, December typically offers the best circumstances for Siem Reap.
Siem Reap Temperature in January
Min Temperature
22°C (72°F)
Max Temperature
33°C (91°F)
Chance of Rain
3%
Precipitation
9.8 mm (0.4 in)
Rainy days
a single day
Humidity
59%
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 January
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 January
The extremes listed below come from historical weather data collected in Siem Reap from 2006 through 2025.
- On January 30, 2011, temperatures climbed to 35°C (95°F), marking the warmest January day on record.
- The coldest January day was on January 12, 2021, with a maximum of 24°C (75°F).
- Siem Reap registered its coldest January night on January 11, 2009, with temperatures dropping to 14°C (57°F).
Best Places in Cambodia in January
Find out more about the weather in Cambodia and which places have the best travel conditions in this month. See all of Cambodia in January →
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 January
Warm temperatures in January make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home.
What To Do in Siem Reap in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
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 January
Where to go in January - average daytime high across popular destinations.
Battambang
34°C (93°F) Phnom Penh
34°C (93°F) Siem Reap33°C (91°F) Chambok32°C (90°F) Kep31°C (88°F) Kampot
31°C (88°F) Sihanoukville30°C (86°F) Koh Rong Island29°C (84°F) Bucket list
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