What to pack for Siem Reap in December
Heading to Siem Reap in December? Here's a packing list built directly from local climate averages — not generic blog advice.
December is one of the coldest months of the year in Siem Reap (ranked 12 of 12) and among the driest (ranked 10 of 12). Day temperatures are flat compared to November and still warming into January — so this month's packing list won't be identical to November's or January's.
Essentials
- ★ Passport + a photocopy stored separately Travel documents
- ★ Phone + charging cables (USB-C, Lightning as needed) Daily essentials
- • Refillable water bottle (1L) Reduces single-use plastic + saves money
- • Compact daypack (15–20L) For day trips, hands-free walking
- • Travel-size first-aid kit (band-aids, ibuprofen, antihistamines) Pharmacy access varies
Tops
- ★ Lightweight LINEN shirts (3) — short and long sleeve Avg high 31°C, hot dry — linen wicks sweat, breathes, dries fast
- ★ Breathable t-shirts (4–5) — linen-blend, bamboo, or merino Avoid pure cotton in this heat
- · Tank tops (2) Peak heat hours
Bottoms
- ★ Lightweight breathable shorts (3–4) — linen or quick-dry Avg high 31°C
- • 1 pair of light long pants Sun cover for long days + AC indoors
Outerwear & layers
- • Lightweight cardigan or pashmina shawl Brutal restaurant/transport AC + cool evenings
Rain & weather protection
- · Travel-sized umbrella Just in case (low rain risk)
Footwear
- ★ Walking sandals with arch support (Teva, Chaco, Birkenstock) Warm weather comfort
- ★ Comfortable closed-toe walking shoes — sneakers Long sightseeing days, religious sites, traffic-dodging
Accessories
- ★ High-SPF sunscreen (SPF 30+ minimum, 50+ for fair skin) Strong sun expected
- ★ Sunglasses with UV400 protection Sunny conditions
- ★ Wide-brim sun hat or peaked cap Sun protection
✅ Can you carry-on?
Yes — December in Siem Reap packs comfortably into a carry-on. Conditions stay mild enough that you can rely on light layers, one pair of shoes, and a packable rain shell.
17 suggested items total — 5 essentials, 6 clothing items, 2 pairs of shoes.
What you can leave at home
Based on Siem Reap's December climate, here's what won't earn its bag space:
- heavy winter coat & thermal underwear
- gloves, scarves, and wool hats
- rain shell and waterproof bag covers (sky stays mostly dry)
- snow boots and ice grips
How this list was built
Every recommendation above maps to specific climate data for Siem Reap in December: average high (31°C), average low (21°C), expected rain days (3), and any peak hazard seasons. Heavier items appear at colder temperatures; rain gear scales with how often it rains; sun protection appears when it's warm and dry.
The ★ items are essential — pack these first. The • items are recommended for comfort. The · items are nice-to-have if you have space.
Other months in Siem Reap
Daily forecasts, climate averages, and the best activities for the season.