What to pack for St. Louis in December
Heading to St. Louis 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 St. Louis (ranked 10 of 12) and among the driest (ranked 12 of 12). Day temperatures are 4°C cooler than November and cooling toward 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
- ★ Long-sleeve shirts (4–5) — flannel, henley, or merino Avg high 8°C — chilly
- ★ Lightweight sweater or fleece (2) Layering for cool days
- • Thin merino base layer (1) Wicking + warmth without bulk
Bottoms
- ★ Jeans or chinos (2) Versatile for mild weather
- • 1 dressier pair (dark chinos or trousers) Restaurants/evenings — works for smart-casual settings
Outerwear & layers
- ★ Warm winter coat (wool overcoat or insulated parka) Overnight lows -0.7°C
- ★ Wool scarf + warm beanie Heat retention
- ★ Insulated gloves (touchscreen-compatible) Cold mornings
Rain & weather protection
- ★ Waterproof jacket or rain shell (e.g. Patagonia Torrentshell) 10 rain days expected
- ★ Compact travel umbrella For sudden showers
Footwear
- ★ Insulated waterproof boots (Blundstone, Sorel, or hiking-grade) Cold + possibly wet conditions
- ★ Wool socks (5+ pairs) — Smartwool, Darn Tough Warmth and dryness; cotton socks freeze fingers in damp cold
Accessories
- • Lip balm with SPF + thick hand cream Cold dry air cracks skin fast
Power, voltage & adapters
- ★ 120V at 60Hz Mains electricity standard for United States
- ★ Plug types: A, B (Type A — flat 2-pin (US/Canada/Japan style)) Most common: A. Older buildings may also use B.
- • From the UK/Ireland: bring a G→A travel adapter UK Type G plugs don't fit United States's outlets
- • From continental Europe: bring a C/F→A travel adapter EU Type C/F plugs don't fit United States's outlets
- • If your device is labeled '220–240V only' (common for European hairdryers/kettles), it WILL underperform or not work at all here. Most phone/laptop chargers are dual-voltage — they're fine. United States runs 120V — too low for EU-only 230V devices
- · Easiest option: a universal travel adapter (e.g. Anker, Epicka) that handles A/B/C/E/F/G/I in one — covers ~95% of countries. If you travel to multiple regions
⚖️ Can you carry-on?
Maybe — possible with a packable down jacket, careful shoe choices (one warm + one walking), and wearing your bulkiest layer on the plane. Expect to use most of the carry-on volume.
24 suggested items total — 5 essentials, 8 clothing items, 2 pairs of shoes.
What you can leave at home
Based on St. Louis's December climate, here's what won't earn its bag space:
- shorts & sandals (too cool to wear comfortably)
- beach towel (unless you're brave)
- snow boots and ice grips
How this list was built
Every recommendation above maps to specific climate data for St. Louis in December: average high (8°C), average low (-0.7°C), expected rain days (10), 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 St. Louis
Daily forecasts, climate averages, and the best activities for the season.