San Diego Weather: Monthly Averages & Temperatures

San Diego, California, is known for its beautiful weather, but what can you expect month-to-month? This guide provides a detailed look at San Diego's monthly weather patterns, including average temperatures, rainfall, and sunshine hours. Whether you're planning a visit or just curious, understanding the climate will help you make the most of this Southern California gem.

Monthly Weather Overview

San Diego boasts a mild, Mediterranean climate, characterized by warm, dry summers and mild, wet winters. The city's proximity to the Pacific Ocean moderates temperatures, resulting in relatively stable conditions year-round. However, there are distinct variations in temperature and precipitation across the months.

Spring (March - May)

Spring in San Diego is pleasant, with gradually increasing temperatures and sunshine. This season is ideal for outdoor activities, with fewer crowds than the peak summer months.

March

• Average High: 66°F (19°C)
• Average Low: 52°F (11°C)
• Average Rainfall: 1.5 inches

March sees the tail end of the rainy season, but rainfall decreases as the month progresses. Temperatures are mild, and the city's gardens and parks are in full bloom.

April

• Average High: 68°F (20°C)
• Average Low: 54°F (12°C)
• Average Rainfall: 0.7 inches

April is a delightful month in San Diego, with warmer temperatures and less rain. The city starts to buzz with events and festivals, and outdoor activities become more appealing.

May

• Average High: 70°F (21°C)
• Average Low: 57°F (14°C)
• Average Rainfall: 0.2 inches

May marks the transition into summer, with warm days and plenty of sunshine. The marine layer, a coastal fog, can occasionally make mornings cooler, but it typically burns off by midday.

Summer (June - August)

Summer in San Diego is warm and dry, with long sunny days and minimal rainfall. This is the peak tourist season, with crowded beaches and plenty of outdoor events.

June

• Average High: 72°F (22°C)
• Average Low: 61°F (16°C)
• Average Rainfall: 0.1 inches

June is often characterized by the "June Gloom," a persistent marine layer that can keep coastal areas cool and overcast in the mornings. However, the afternoons are usually sunny and warm.

July

• Average High: 76°F (24°C)
• Average Low: 64°F (18°C)
• Average Rainfall: 0 inches

July is one of the warmest and driest months in San Diego. Sunshine is abundant, and the ocean is perfect for swimming and water sports.

August

• Average High: 78°F (26°C)
• Average Low: 65°F (18°C)
• Average Rainfall: 0.1 inches

August is typically the hottest month in San Diego, with temperatures often reaching the high 70s. The beaches are crowded, and the city is full of energy.

Autumn (September - November)

Autumn in San Diego is warm and sunny, often considered the best time to visit. The crowds have thinned, and the ocean remains warm enough for swimming.

September

• Average High: 77°F (25°C)
• Average Low: 64°F (18°C)
• Average Rainfall: 0.3 inches

September continues the warm, dry weather of summer, but with fewer tourists. This month is ideal for enjoying outdoor activities without the summer crowds.

October

• Average High: 73°F (23°C)
• Average Low: 59°F (15°C)
• Average Rainfall: 0.6 inches

October is another fantastic month in San Diego, with comfortable temperatures and plenty of sunshine. The city hosts numerous fall festivals and events.

November

• Average High: 68°F (20°C)
• Average Low: 54°F (12°C)
• Average Rainfall: 1.2 inches

November sees a transition towards winter, with slightly cooler temperatures and increased rainfall. However, the days are still mostly sunny, and outdoor activities remain popular.

Winter (December - February)

Winter in San Diego is mild and wet, with the majority of the year's rainfall occurring during these months. While it's not beach weather, there are still plenty of sunny days, and the city is less crowded. — Bucks County PA Weather: Today's Forecast & Updates

December

• Average High: 65°F (18°C)
• Average Low: 50°F (10°C)
• Average Rainfall: 2.0 inches

December is the wettest month in San Diego, but the rain is interspersed with sunny days. The city is festive with holiday decorations, and there are numerous indoor activities to enjoy.

January

• Average High: 64°F (18°C)
• Average Low: 49°F (9°C)
• Average Rainfall: 2.0 inches

January is one of the coolest months in San Diego, but temperatures are still mild compared to other parts of the country. Rainfall is common, but there are also many sunny days.

February

• Average High: 64°F (18°C)
• Average Low: 50°F (10°C)
• Average Rainfall: 2.0 inches

February is similar to January in terms of temperature and rainfall. The city starts to see signs of spring towards the end of the month, with flowers blooming and days getting longer.

Weather and Activities

San Diego's diverse climate lends itself to a variety of activities throughout the year.

• Beaches and Water Sports: Summer is the best time for swimming, surfing, and sunbathing. However, the water remains relatively warm in the fall, making September and October great months for beachgoers.
• Hiking and Outdoor Adventures: Spring and fall offer ideal temperatures for hiking and exploring San Diego's many trails. Winter can also be pleasant, but be prepared for occasional rain.
• City Exploration: San Diego has a vibrant downtown area, with museums, restaurants, and cultural attractions. These can be enjoyed year-round, regardless of the weather.

Historical Weather Data

For a more in-depth look at San Diego's weather patterns, it's helpful to examine historical data. The National Weather Service (weather.gov) provides detailed climate information, including average temperatures, rainfall, and sunshine hours. This data can help you plan your trip and pack accordingly.

Conclusion

San Diego's mild, Mediterranean climate makes it a desirable destination year-round. While there are variations in temperature and rainfall across the months, the city generally enjoys sunny days and comfortable conditions. Whether you're visiting in the summer for the beaches or in the fall for the festivals, San Diego's weather is sure to enhance your experience.

FAQs About San Diego Weather

What is the average temperature in San Diego?

The average annual temperature in San Diego is around 70°F (21°C). However, this varies by season, with summer being the warmest and winter the mildest.

Does it rain a lot in San Diego?

San Diego has a dry climate, with most of the rainfall occurring during the winter months (December to February). The annual average rainfall is about 10 inches.

What is the best time to visit San Diego for good weather?

The best time to visit San Diego for good weather is in the spring (April-May) or fall (September-October). These months offer warm temperatures, plenty of sunshine, and fewer crowds than the summer. — Milton, WV Weather: Accurate Forecast & Local Updates

What is the marine layer in San Diego?

The marine layer is a coastal fog that often forms in the mornings during the late spring and early summer in San Diego. It is caused by the interaction of cool ocean air with warm inland air. The marine layer typically burns off by midday, leaving sunny skies.

How should I pack for a trip to San Diego?

For a summer trip, pack light clothing, swimwear, and sunscreen. For spring or fall, bring layers, as the mornings and evenings can be cool. If you're visiting in the winter, pack a light jacket and an umbrella, as there may be rain.

Is San Diego hot in the summer?

San Diego can get hot in the summer, with average high temperatures in the mid-70s to low 80s Fahrenheit (around 24-27°C). However, the coastal areas are usually milder due to the ocean breeze.

What are the average sunshine hours per day in San Diego?

San Diego averages around 146 sunny days per year. The city enjoys approximately 70% of possible sunshine during the year. — KawaiiSofey OnlyFans: The Truth About Leaks