What to pack for San José in January
Heading to San José in January? Here's a packing list built directly from local climate averages — not generic blog advice.
January is one of the coldest months of the year in San José (ranked 11 of 12) and among the driest (ranked 11 of 12). Day temperatures are flat compared to December and still warming into February — so this month's packing list won't be identical to December's or February'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
- ★ T-shirts (5–6) — cotton or merino Avg high 24°C — warm
- • 1–2 long-sleeve linen or chambray shirts Cooler evenings + sun protection
Bottoms
- ★ Light chinos or trousers (1–2) Cooler evenings + cultural sites
- • Shorts (2) — knee-length Daytime warmth
Outerwear & layers
- ★ Light jacket — denim, bomber, or packable windbreaker Overnight lows 15°C
Footwear
- ★ Comfortable walking shoes (broken in) Mild weather, lots of walking
- • Lightweight sneakers (1 backup pair) Rotation prevents blisters
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
Power, voltage & adapters
- ★ 120V at 60Hz Mains electricity standard for Costa Rica
- ★ 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 Costa Rica's outlets
- • From continental Europe: bring a C/F→A travel adapter EU Type C/F plugs don't fit Costa Rica'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. Costa Rica 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?
Yes — January in San José 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.
21 suggested items total — 5 essentials, 5 clothing items, 2 pairs of shoes.
What you can leave at home
Based on San José's January climate, here's what won't earn its bag space:
- heavy winter coat & thermal underwear
- 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 San José in January: average high (24°C), average low (15°C), expected rain days (1), 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 San José
Daily forecasts, climate averages, and the best activities for the season.