United States
San Diego in January
🌤️ Cool seasonPleasant and some showers.
🎒 Pack: light layers
Why January scores 9.0What goes into the score
How it works- Weather comfort9.4
- ✓Comfortable temperatures (19°C highs / 10°C lows)
- ✓Comfortable humidity (dew point 6.1°C)
- ✓Mostly dry (~50 mm rain)
- Air quality7.7
- ✓Moderate (PM2.5 ~20 µg/m³)
- Seasonal hazards10.0
- ·No notable seasonal hazards
- Safety baseline7.5
- ·Increased caution
| Jan | Oct | |
|---|---|---|
| Score | 9.0 Excellent | 9.5 Excellent |
| Season | 🌤️ Cool season | ☀️ Warm dry season |
| High / low | 19° / 10° | 24° / 16° |
| Rain | 50 mm | 13 mm |
| Humidity | dew pt 6° | dew pt 10° |
| PM2.5 | 20 µg/m³ | 15 µg/m³ |
Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: San Diego Airport weather-station normals. Rainfall: San Diego International Airport weather-station normals (national met service).
Holidays & crowdsJanuary 2027
Long weekendThere's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.
- New Year 1–3 Jan · 3 days off in a row
- Martin Luther King Jr. Day 16–18 Jan · 3 days off in a row
National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).
Explore San DiegoEvents, sights, food & souvenirs
Check event dates locallySouthern California coastal city near the Mexican border, known for mild weather year-round, beaches, Balboa Park and its zoo.
Gray whale migrationDate variesUsually December to March
Gray whales pass the coast on their migration to and from Baja California lagoons.
Why go: Whale-watching boats run from the harbour.
Where: Off the coast
Coming up later
San Diego County FairDate variesUsually June to early July
A large county fair with rides, food and concerts.
Why go: Busy on weekends.
Where: Del Mar Fairgrounds
Comic-Con InternationalDate variesUsually July
One of the world's largest comics and pop culture conventions.
Why go: Hotels fill up and prices rise; badges sell out early.
Where: San Diego Convention Center
Balboa Park
A large park with Spanish Revival buildings, gardens and many museums.
San Diego Zoo
A large, well-known zoo inside Balboa Park.
La Jolla Cove
A small cove with sea lions on the rocks, snorkelling and tide pools.
💡 Keep a distance from the animals.
USS Midway Museum
A retired aircraft carrier on the downtown waterfront, now a museum.
Old Town San Diego
A state historic park on the site of the early Mexican-era town, with adobe buildings.
Coronado Beach
A wide sandy beach in front of the Victorian-era Hotel del Coronado.
💡 Overcast mornings are common in May and June ('May Gray' and 'June Gloom').
Fish tacos
Battered or grilled fish in tortillas with cabbage and creamy sauce, inspired by Baja California.
💡 Taco shops and beach eateries
California burrito
A San Diego burrito filled with carne asada and French fries.
💡 Taco shops
Craft beer
San Diego has a large number of breweries known especially for IPAs.
💡 Breweries in North Park and Miramar
Mexican food
Traditional Mexican dishes reflecting the border location.
💡 Old Town and Barrio Logan
Craft beer
Bottles or cans from local breweries.
💡 Brewery taprooms
Surf gear
Clothing and accessories from local surf shops.
💡 Pacific Beach and Ocean Beach
Airport transfer Kiwitaxi
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