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San Diego Weather in January

San Diego weather in January features cool and mild conditions with highs in the 60s°F and lows in the high 40s°F. Discover why January is a fantastic time to visit, what to pack, and the seasonal highlights that make it unique.

Mac Douglass profile image
by Mac Douglass
San Diego Weather in January

What Is the Weather Like in San Diego in January?

San Diego in January offers a mild winter experience, with average high temperatures around 65°F (18°C) and lows near 48°F (9°C). These temperatures make it an ideal month for outdoor exploration and cultural activities. Rain is minimal, and sunshine is abundant, with over 217 hours of sunlight throughout the month.

For those hoping to enjoy the beach, January might not be the best time for swimming due to cooler ocean temperatures. However, the mild weather is perfect for enjoying scenic coastal views, whale-watching excursions, and popular city attractions.

Average January Weather in San Diego

San Diego's January weather features mild highs around 65-66°F and cooler lows near 48-49°F, making it perfect for outdoor activities and seasonal events. Data from WeatherSpark.
  • Daytime Temperatures: Highs average around 65°F, with a slight warming trend by the end of the month.
  • Nighttime Temperatures: Lows hover near 48°F, occasionally dipping cooler late at night.
  • Rainfall: January sees light rain, averaging 1.53 inches across a few days.
  • Ocean Temperatures: Cooler waters limit swimming but provide stunning views for beachgoers.

January San Diego Weather Compared to Other Months

Month Average High (°F) Average Low (°F) Days with Precipitation Hours of Sunshine Average Precipitation (in)
January 65 48 6 217 1.53
February 76 65 1 255 0.15
March 73 61 3 234 0.57
April 69 54 4 236 1.01
May 76 67 0 277 0.02
June 75 65 0 293 0.03
July 71 62 1 253 0.07
August 69 59 2 261 0.12
September 67 56 5 242 0.78
October 66 53 7 262 1.81
November 65 51 7 212 2.27
December 65 49 7 216 1.98

San Diego's weather in January is one of the mildest of the year, with average highs in the mid-60s°F and lows near 48°F.

Compared to the warmer months like June, where average highs reach 75°F, January offers a cooler and quieter atmosphere. While January features slightly more rainfall than summer, the balance of sunny days and pleasant temperatures makes it perfect for exploring the city’s attractions and enjoying seasonal activities.

Things to Do in San Diego in January

San Diego's January weather provides a great backdrop for exciting seasonal activities and events.

  • San Diego Rodeo (January 10-12): Experience the thrill of the first-ever rodeo at Petco Park, featuring C5 Rodeo Company and Outriders Present.
  • Farmers Insurance Open (January 22-25): Watch world-class golfers compete at Torrey Pines, with ocean views and fun fan attractions.
  • San Diego Restaurant Week (January 26 - February 2): Treat your taste buds during an 8-day food extravaganza featuring over 100 restaurants.
  • Winter Gray Whale Watching: Witness the breathtaking migration of 20,000 gray whales along San Diego’s coast—a bucket list experience.

Why Visit San Diego in January?

San Diego's January weather is perfect for a quiet escape, with fewer tourists and cooler temperatures that make exploring easy and enjoyable. Highlights include:

San Diego Weather Guides for Every Month

San Diego Weather in January
San Diego weather in January features cool and mild conditions with highs in the 60s°F and lows in the high 40s°F. Discover why January is a fantastic time to visit, what to pack, and the seasonal highlights that make it unique.
San Diego Weather in February
San Diego weather in February offers a mild winter experience with highs in the 60s°F and lows in the 50s°F. Discover why February is perfect for exploring the city, enjoying seasonal events, and taking advantage of the cooler climate.
San Diego Weather in March
San Diego weather in March marks the beginning of spring, with warmer days and mild evenings. Explore why March is a fantastic time to visit, along with highlights of the season’s best events and activities.
San Diego Weather in April
San Diego weather in April features average highs in the upper 60s°F and lows in the mid-50s°F, with minimal rainfall and plenty of sunshine. Explore why April’s mild spring weather makes it an ideal time to enjoy San Diego’s outdoor activities and seasonal events.
San Diego Weather in May
San Diego weather in May marks the transition to summer, offering warm days, cool evenings, and plenty of sunshine. With average highs of 76°F and lows of 67°F, and almost no rainfall, May is perfect for enjoying the city’s vibrant outdoor events and natural beauty.
San Diego Weather in June
San Diego weather in June features sunny days with mild evenings. With average highs of 75°F, lows around 65°F, and over 293 hours of sunshine, June provides plenty of opportunities to enjoy all that the city has to offer.
San Diego Weather in July
San Diego weather in July offers sunny days, mild evenings, and a perfect backdrop for summer festivities. With average highs of 71°F, lows of 62°F, and just 0.07 inches of rainfall, July is an ideal time to enjoy the city’s beaches, cultural events, and vibrant nightlife.
San Diego Weather in August
San Diego weather in August is a summer dream with sunny days, mild evenings, and warm coastal waters. With average highs of 69°F, lows of 59°F, and just 0.12 inches of rainfall, August is the perfect month to enjoy beach outings, outdoor festivals, and cultural events across the city.
San Diego Weather in September
With average highs of 67°F, lows of 56°F, and 0.78 inches of rainfall across five days, September weather in San Diego offers a pleasant climate for outdoor activities, beach outings, and vibrant city events.
San Diego Weather in October
San Diego in October transitions into cooler weather while maintaining its signature mildness. With average highs of 66°F and lows of 53°F, October offers a comfortable climate perfect for exploring San Diego’s festivals and attractions.
San Diego Weather in November
San Diego in November signals the onset of cooler days and crisp evenings. With average highs of 65°F and lows of 51°F, November offers a blend of mild weather and festive charm, ideal for exploring San Diego’s seasonal activities and events.
San Diego Weather in December
San Diego weather in December features mild temperatures with highs in the 60s°F and lows in the 50s°F. Explore key seasonal events, tips for visiting, and why December is great option for visiting San Diego.
Mac Douglass profile image
by Mac Douglass

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