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Weather Comparison

Bangkok vs Siem Reap

Side-by-side weather comparison for January

Bangkok: 31°CSiem Reap: 31°C364 km apart

January Weather: Bangkok vs Siem Reap

MetricBangkokSiem ReapBetter
Average HighHigher is warmer31°C (88°F)31°C (88°F)Tie
Average LowHigher is milder21°C (70°F)21°C (70°F)Tie
Rain DaysFewer is drier3 days2 daysSiem Reap
PrecipitationLess is drier15 mm8 mmSiem Reap
Sunshine HoursMore is sunnier10h/day10h/dayTie
HumidityLower is more comfortable82%82%Tie
UV IndexLower is safer33Tie
Wind SpeedCalmer is better12 km/h13 km/hBangkok

Which City is Better in January?

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Siem Reap edges ahead as the better destination in January. Siem Reap offers 10 hours of daily sunshine with only 2 rain days, while Bangkok sees 10 sunshine hours and 3 rain days.

Bangkok can feel quite hot at 31°C, so plan for heat. Siem Reap runs hot at 31°C.

For travelers who prioritize dry weather, Siem Reap is the stronger choice in January.

Temperature Comparison in January

Bangkok reaches an average high of 31°C (88°F) and drops to 21°C (70°F) at night during January. The daily temperature range is 10°C, meaning moderate variation throughout the day.

Siem Reap averages 31°C (88°F) for the high and 21°C (70°F) for the low, with a daily range of 10°C. The two cities feel quite similar in terms of temperature.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in January.

Rainfall Comparison in January

Bangkok receives approximately 15 mm of rainfall across 3 rain days during January. Rain is occasional, so a light rain jacket should suffice.

Siem Reap sees 8 mm over 2 rain days. That makes Siem Reap the drier option by 1 rain day and 7 mm of total precipitation.

Both cities share similar humidity levels at 82%.

What to Pack: Bangkok vs Siem Reap

Packing for Bangkok in January

Highs of 31°C, lows of 21°C, 3 rain days

  • lightweight breathable clothing
  • sunscreen SPF 50+
  • sunglasses
  • a wide-brimmed hat
  • moisture-wicking fabrics

Packing for Siem Reap in January

Highs of 31°C, lows of 21°C, 2 rain days

  • lightweight breathable clothing
  • sunscreen SPF 50+
  • sunglasses
  • a wide-brimmed hat
  • moisture-wicking fabrics

Pack for both: lightweight breathable clothing, sunscreen SPF 50+, sunglasses, a wide-brimmed hat, moisture-wicking fabrics. These items are useful in either destination during January.

Year-Round Comparison: Bangkok vs Siem Reap

The table below shows average high temperatures and rain days for every month of the year, helping you find the best time to visit either city.January is highlighted for quick reference.

MonthBangkokSiem Reap
HighRainHighRain
Jan31°C3d31°C2d
Feb32°C3d33°C3d
Mar34°C6d34°C9d
Apr35°C11d34°C15d
May33°C21d33°C22d
Jun32°C22d32°C21d
Jul32°C23d32°C22d
Aug31°C24d31°C25d
Sep31°C26d30°C26d
Oct30°C21d30°C23d
Nov31°C7d30°C9d
Dec31°C2d30°C3d
31°

Bangkok Weather in January

Full forecast, packing tips, and activities

31°

Siem Reap Weather in January

Full forecast, packing tips, and activities

Frequently Asked Questions

Is Bangkok warmer than Siem Reap in January?
Bangkok and Siem Reap have the same average high temperature of 31°C (88°F) in January. The average lows are 21°C and 21°C respectively.
Which city gets more rain in January, Bangkok or Siem Reap?
Bangkok gets more rain in January with 3 rain days and 15 mm of precipitation. Siem Reap is the drier option with 2 rain days.
Is it better to visit Bangkok or Siem Reap in January?
It depends on your preferences. Bangkok averages 31°C and 10 hours of daily sunshine with 3 rain days. Siem Reap averages 31°C with 10 sunshine hours and 2 rain days. If you prefer cooler conditions, choose Siem Reap. For fewer rain days, Siem Reap is the better pick.
How far apart are Bangkok and Siem Reap?
Bangkok and Siem Reap are approximately 364 km (226 miles) apart. Bangkok is located in Thailand (Asia) while Siem Reap is in Cambodia (Asia).
What is the best month to visit Bangkok and Siem Reap?
For Bangkok, February tends to be the best month with 11 hours of daily sunshine and a high of 32°C. For Siem Reap, February is typically ideal with 11 sunshine hours and 33°C highs.

Compare Bangkok and Siem Reap in Other Months

Climate data sourced from the Open-Meteo Historical Weather API, using ERA5 reanalysis data covering 30-year normals from 1991 to 2020. All temperatures shown in Celsius with Fahrenheit equivalents. Rain days count days with 1 mm or more of precipitation. Sunshine hours represent average daily values. This comparison is generated from long-term climate averages and individual trips may vary.

Bangkok coordinates: 13.76°N, 100.50°E | Siem Reap coordinates: 13.37°N, 103.84°E