January in Siem Reap — reliably good (2nd best month)
Good · 7.6/10January averages 27°C (81°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rain is a non-issue at 7 mm for the month, with about 21 sunny days and 11.3 hours of daylight to work with.
It scores 7.6/10 here, 2nd of 12 months, against 7.8/10 in the destination's best month.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
February in Siem Reap — workable with trade-offs
Trade-offs · 6.6/10February averages 30°C (85°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 37 mm of rain — occasional showers rather than washed-out days — alongside about 22 sunny days and 11.6 daylight hours.
It scores 6.6/10 here, 4th of 12 months, against 7.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
March in Siem Reap — workable with trade-offs
Trade-offs · 6.3/10March averages 31°C (88°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 43 mm of rain — occasional showers rather than washed-out days — alongside about 25 sunny days and 11.9 daylight hours.
It scores 6.3/10 here, 5th of 12 months, against 7.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
If your dates are flexible, December is materially better in Siem Reap — 1.5 points higher on the same scale.
April in Siem Reap — workable with trade-offs
Trade-offs · 6.2/10April averages 32°C (89°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 47 mm, so plan one flexible day in three; you still get about 26 sunny days and 12.3 hours of daylight.
It scores 6.2/10 here, 6th of 12 months, against 7.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
If your dates are flexible, December is materially better in Siem Reap — 1.6 points higher on the same scale.
May in Siem Reap — the hardest end of the year
Hardest · 3.7/10May averages 30°C (87°F) with humidity around 71%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 153 mm this is a genuinely wet month: about 23 sunny days in total, and outdoor plans need an indoor fallback.
It scores 3.7/10 here, 10th of 12 months, against 7.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, December is materially better in Siem Reap — 4.1 points higher on the same scale.
June in Siem Reap — the hardest end of the year
Hardest · 4.8/10June averages 29°C (84°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 113 mm this is a genuinely wet month: about 24 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.8/10 here, 8th of 12 months, against 7.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, December is materially better in Siem Reap — 3 points higher on the same scale.
July in Siem Reap — the hardest end of the year
Hardest · 3.8/10July averages 28°C (83°F) with humidity around 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 173 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 3.8/10 here, 9th of 12 months, against 7.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, December is materially better in Siem Reap — 4 points higher on the same scale.
August in Siem Reap — the hardest end of the year
Hardest · 3.6/10August averages 28°C (83°F) with humidity around 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
213 mm of rain puts this in monsoon territory — about 23 sunny days across the whole month, and multi-day washouts are normal.
It scores 3.6/10 here, 11th of 12 months, against 7.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, December is materially better in Siem Reap — 4.2 points higher on the same scale.
September in Siem Reap — the hardest end of the year
Hardest · 3.1/10September averages 28°C (82°F) with humidity around 86%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
295 mm of rain puts this in monsoon territory — about 16 sunny days across the whole month, and multi-day washouts are normal.
It scores 3.1/10 here, 12th of 12 months, against 7.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, December is materially better in Siem Reap — 4.7 points higher on the same scale.
October in Siem Reap — the hardest end of the year
Hardest · 4.9/10October averages 27°C (81°F) with humidity around 84%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 115 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.9/10 here, 7th of 12 months, against 7.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, December is materially better in Siem Reap — 2.9 points higher on the same scale.
November in Siem Reap — reliably good (3rd best month)
Good · 7/10November averages 27°C (81°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 36 mm of rain — occasional showers rather than washed-out days — alongside about 19 sunny days and 11.4 daylight hours.
It scores 7/10 here, 3rd of 12 months, against 7.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
December in Siem Reap — the year's strongest window
Best window · 7.8/10December averages 27°C (80°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rain is a non-issue at 8 mm for the month, with about 20 sunny days and 11.2 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Siem Reap at 7.8/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
