Verdict: Excellent month
Siem Reap Weather in January
January runs warm in Siem Reap, with daily highs around 31°C (88°F) and nights near 21°C (70°F). Rain is a non-issue, with only ~2 wet days in an average year. Overall, January is one of the best months of the year to be in Siem Reap.
Average high
31°C / 88°F
Average low
21°C / 70°F
Rain days
~2
Precipitation
25 mm
What to pack for Siem Reap in January
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Comfortable walking shoes — every guide on this site assumes you'll use them
January against the rest of the year
Warmest in Siem Reap: Mar (35°C / 95°F) · Coolest: Oct (30°C / 86°F) · Wettest: Sep (~29 rain days)
31°
21°
Jan
33°
23°
Feb
35°
25°
Mar
34°
26°
Apr
33°
26°
May
33°
26°
Jun
32°
25°
Jul
32°
25°
Aug
31°
24°
Sep
30°
23°
Oct
30°
23°
Nov
30°
21°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)