November 21 is statistically one of the best days of the year in San Diego. With minimal rain risk (11%) and pleasant highs of 20°C, it's ideal for outdoor adventures. You'll find plenty of company in San Diego this month as tourism activity remains quite robust.
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Essential Travel Info for San Diego
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Connect
The most common area code for San Diego ...
Safety
Moderate Safety
GPI: 2.44
San Diego Weather Forecast for November 21
"Mild & Comfortable. Expect average highs of 20.2°C. 11% chance of rain."
What to Wear in San Diego in November
Based on historical data for November 21, San Diego typically experiences temperatures between 11°C and 20.2°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (11% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for San Diego
Smart Suitcase
- Light Jacket
- Long Pants
Average High
20.2°C
Daytime Peak
Average Low
11°C
Nighttime Low
Feels Like
20.2°C
☀️ Feels accurate
Rain Chance
11%
Avg 0.4mm if it rains
Cloud Cover
44%
Overcast
Pressure
1016.7 hPa
Low volatility
San Diego Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 92% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 160 min to burn
Type III-IV
🟡 240 min to burn
Type V-VI
🟢 400 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
14.8°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
Busy
63/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~281
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in San Diego
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:25
☀️ Noon
11:36
🌇 Sunset
16:46
⏱️ Daylight
10h 20m
Wind Speed
13.4 km/h
Gentle breeze
Sunshine
8.6 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for San Diego
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in San Diego
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
Eastern Pacific Hurricane Risk
Season: May - Nov
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, San Diego on November 21 averages 20.2°C with a 11% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
San Diego Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (November 21) in other destinations
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📍 Is San Diego Worth Visiting on November 21?
Planning a trip to San Diego on November 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 20.2°C with a 11% historical precipitation risk.
✈️ Travel Logistics: Approximately 281 landing slots available daily during this period, indicating manageable crowd levels.
🌊 Coastal Conditions: Water temperature averages 16.7°C (polar plunge). Wave conditions are generally fun waves with heights around 0.88m.
📊 Historical Extremes: The hottest November 21 recorded in the last 30 years saw temperatures hit 26.1°C in 2017, while the coldest dropped to 6.8°C in 2024.