December Packing List for San Diego — What to Wear & Bring

Essentials

If you only pack a few things, pack these.

• Light waterproof jacketEssential

  San Diego's December brings 5 rainy days as the Mediterranean wet season is active — a waterproof jacket handles the winter showers during Balboa Park December Nights and Gaslamp Quarter holiday visits.

• Mid-weight sweater or fleeceEssential

  December mornings in San Diego start at 50°F — a mid-weight sweater provides the morning warmth needed before the afternoon warms to 66°F, particularly for early outdoor Balboa Park visits.

• Long-sleeve shirts and layering topsEssential

  San Diego's December temperature spread (50°F to 66°F) rewards layering — long-sleeve shirts under a sweater handle the cold start and peel back for the pleasant 66°F afternoon at Balboa Park and the waterfront.

• Light jeans or comfortable pantsEssential

  December's 50°F San Diego mornings make pants the appropriate choice — light jeans are versatile for the Gaslamp Quarter's holiday season, Balboa Park December Nights, and casual coastal outdoor activities.

• Water-resistant ankle bootsEssential

  December's 5 rainy days make waterproof ankle boots the sensible San Diego choice — Balboa Park's December Nights and the Gaslamp Quarter holiday scene involve outdoor walking on wet pavement during rain events.

Clothing

• Light waterproof jacketEssential

  San Diego's December brings 5 rainy days as the Mediterranean wet season is active — a waterproof jacket handles the winter showers during Balboa Park December Nights and Gaslamp Quarter holiday visits.

• Mid-weight sweater or fleeceEssential

  December mornings in San Diego start at 50°F — a mid-weight sweater provides the morning warmth needed before the afternoon warms to 66°F, particularly for early outdoor Balboa Park visits.

• Long-sleeve shirts and layering topsEssential

  San Diego's December temperature spread (50°F to 66°F) rewards layering — long-sleeve shirts under a sweater handle the cold start and peel back for the pleasant 66°F afternoon at Balboa Park and the waterfront.

• Light jeans or comfortable pantsEssential

  December's 50°F San Diego mornings make pants the appropriate choice — light jeans are versatile for the Gaslamp Quarter's holiday season, Balboa Park December Nights, and casual coastal outdoor activities.

• Light down vest or additional mid-layerRecommended

  San Diego's coastal December evenings at 50°F feel noticeably cooler with the ocean wind at La Jolla and Coronado — a down vest adds warmth over a sweater for the outdoor holiday events that define the month.

Footwear

• Water-resistant ankle bootsEssential

  December's 5 rainy days make waterproof ankle boots the sensible San Diego choice — Balboa Park's December Nights and the Gaslamp Quarter holiday scene involve outdoor walking on wet pavement during rain events.

• Comfortable walking shoesRecommended

  December is Balboa Park's December Nights festival month — the multi-day holiday event involves hours of outdoor walking on Balboa Park's paved paths, requiring well-cushioned walking shoes.

• Warm socksRecommended

  San Diego's 50°F December mornings with occasional rain make warm socks worth packing — wool or thermal socks improve comfort in water-resistant boots during the cooler wet winter morning conditions.

Accessories

• Compact umbrellaRecommended

  December's 5 rainy days bring intermittent San Diego winter rain — a compact umbrella handles the showers during Balboa Park December Nights and the Gaslamp Quarter holiday season without requiring full rain gear.

• Light scarfRecommended

  December mornings at 50°F benefit from a scarf in San Diego, particularly at coastal locations like La Jolla Cove and Coronado Beach where ocean breeze adds to the morning cool.

• SunglassesRecommended

  San Diego's December sunshine between rain systems is bright — UV Index values of 3–4 are common on clear December days, and afternoon outdoor Balboa Park time still warrants UV-blocking sunglasses.

• SPF 30 sunscreenOptional

  Southern California's December UV at UV Index 3–4 is lower than summer but still meaningful for extended outdoor time — Balboa Park's December Nights and outdoor holiday activities warrant sunscreen application.

Gear

• Reusable water bottleRecommended

  San Diego's dry coastal winter air dehydrates even in cool December conditions — a water bottle is practical for the multi-hour outdoor Balboa Park December Nights events and holiday park visits.

• Small daypackOptional

  December's variable San Diego weather — possible morning rain, pleasant 66°F afternoon — benefits from a small daypack to carry peel-off layers, an umbrella, and essentials for full-day holiday season outings.

• Waterproof bag linerOptional

  December rain in San Diego comes in brief but wet systems — a waterproof liner protects tech and essentials during the 5 rainy days when outdoor holiday activities are interrupted by showers.