Siem Reap or Bangkok in January?
On climate data, Bangkok comes out ahead overall in January. See the per-criterion details below.
Siem ReapPhoto: Bahnfrend · CC BY-SA 4.0
BangkokPhoto: Supanut Arunoprayote · CC BY 4.0Key figures in January
| Criterion | Siem Reap | Bangkok |
|---|---|---|
| Average daily high | 34 °C | 33 °C |
| Average daily low | 21 °C | 20 °C |
| Rainy days | 3 rainy days (est.) | 2 rainy days (est.) ★ |
| Sun | 6 h/day | 6 h/day |
| Humidity | 57 % | 63 % |
Winner by travel type
Siem Reap or Bangkok in January: the short answer
In January, Bangkok comes out ahead on the overall climate score (Siem Reap 65/100 vs Bangkok 66/100). That is a snapshot of one month, though — which one truly fits depends on what you want from the trip, so the breakdown below goes criterion by criterion.
This comparison focuses on January as a representative month for the pair; for any other month, use each destination's month-by-month pages. Across the whole year Siem Reap averages a climate score of 49/100, Bangkok 49/100. Both profiles below are historical monthly averages, not a forecast.
Weather in January, side by side
The average daily high is about 34 °C in Siem Reap and 33 °C in Bangkok — warmer in Siem Reap. Average daily lows are around 21 °C versus 20 °C.
On rain, Siem Reap sees about 3 rainy days in January and Bangkok about 2 — drier in Bangkok. Sunshine is comparable (6 vs 6 hours a day).
Rain and sun across the year
Over a full year Siem Reap records roughly 178 rainy days and Bangkok about 180 — the drier of the two overall is Siem Reap. At their sunniest, Siem Reap reaches about 7 hours of sun a day (April) and Bangkok about 8 (April). If dependable dry, sunny weather is your top priority, weigh these annual totals alongside the single month above.
Best time to visit each
Climatically, Siem Reap is at its best in January, February, November and December, while Bangkok peaks in January, February, November and December. If your dates are fixed, pick the destination whose strong season overlaps them; if you are flexible, plan around these windows.
Which suits which kind of trip
Based on the January scores for each travel style:
City breaks: Bangkok scores higher in January (Siem Reap 66 vs Bangkok 67).
Active & hiking: both are close (Siem Reap 62 vs Bangkok 62).
Family: Bangkok scores higher in January (Siem Reap 67 vs Bangkok 69).
Verdict: which should you pick?
In January, Bangkok leads overall and for city breaks and family trips, while active trips is effectively tied. Choose using the January values and travel-style scores above. The rounded annual overall scores are also tied (49/100). A higher annual score therefore cannot decide the choice. Use the monthly values for your actual travel dates.