San Diego · WinterMonth summary
San Diego weather in December
✅ Good
🌡️ Temperature min / max
48°F – 64°F
🌧 Rainy days
16% of days
☀️ Sunshine
9.5h per day on average
🌊 🌊 Season
Winter
⭐ ⭐ Weather score
7.3/10
📅 📅 Best month
July (9.1/10)
Quick decision
Should you visit San Diego in December?
✅ Good
✅ Yes if: you want to explore the city on foot without suffering from heat.
❌ No if: you're looking for a beach destination — water and air are still cool.
Our take: December is a good time to visit San Diego. July remains slightly better (+1.8 pts).
By trip type
San Diego in December by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : ❌ Not recommended
- 💰 💰 Budget : ✅ Low season
Local context
What to expect in December
In December, San Diego sees 18°F during the day with 9.5h of sunshine per day. Rain risk remains low (16% of days), leaving good room for outdoor activities. Not the best window, but acceptable if dates are constrained. July (9.1/10) is significantly better if possible.
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All months for San Diego
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| ⛅ January | 46°F | 63°F | 20% | 0.1in | 9.9h | 7.2/10 |
| ⛅ February | 48°F | 63°F | 18% | 0.1in | 10.0h | 7.2/10 |
| ⛅ March | 50°F | 63°F | 28% | 0.1in | 11.2h | 7.2/10 |
| 🌤️ April | 55°F | 66°F | 12% | 0.0in | 12.0h | 7.8/10 |
| 🌤️ May | 57°F | 68°F | 10% | 0.0in | 11.7h | 8.0/10 |
| 🌤️ June | 61°F | 72°F | 2% | 0.0in | 12.0h | 8.6/10 |
| 🌤️ July | 64°F | 75°F | 0% | 0.0in | 12.5h | 9.1/10 |
| ☀️ August | 66°F | 77°F | 2% | 0.0in | 12.0h | 9.1/10 |
| 🌤️ September | 64°F | 75°F | 4% | 0.0in | 11.3h | 8.8/10 |
| 🌤️ October | 59°F | 73°F | 7% | 0.0in | 10.8h | 8.5/10 |
| 🌤️ November | 54°F | 70°F | 11% | 0.0in | 9.8h | 7.9/10 |
| 🌤️ December | 48°F | 64°F | 16% | 0.1in | 9.5h | 7.3/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In December, San Diego averages 64°F, 16% rainy days and 9.5h of sunshine per day. Overall weather score: 7.3/10.
See methodology →
Comparison
December vs July (best month)
The best month is July (score 9.1/10). Difference:
- 🌡️ Max temperature : +6°F
- 🌧 Rainy days : -16%
- ☀️ Sunshine : +3.0h/day
FAQ
FAQ — San Diego in December
Is December a good time to visit San Diego?
December is an acceptable time for San Diego (score 7.3/10). Conditions are decent but not optimal — consider July (9.1/10) if possible.
What to do in San Diego in December?
With 64°F max and 9.5h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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Activities & tours
Activities and tours in San Diego
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