Last updated: February 24, 2025
Experience the vibrant October weather in San Diego, where warm days and cool nights create a perfect autumn backdrop. With maximum temperatures reaching a balmy 32°C (90°F) and an average of 20°C (68°F), outdoor activities flourish under mostly sunny skies. The month sees minimal rainfall, accumulating just 13 mm (0.5 in) over two days, ensuring the landscape stays picturesque. Expect a comfortable level of humidity at 58%, providing a refreshing atmosphere ideal for exploring the city's stunning coastline and cultural attractions. Don’t miss the chance to revel in this delightful blend of warmth and mildness!
In October, San Diego welcomes the autumn season with pleasantly warm temperatures. The month has a minimum of 13°C (55°F) and climbs to an average of 20°C (68°F), peaking at a maximum of 32°C (90°F). This progression reflects a gentle transition into cooler months while still holding onto the warmth of summer. The evenings can be comfortably mild, offering perfect conditions for outdoor activities. As the month progresses, the temperatures begin to dip slightly, signaling the approach of winter, yet San Diego's climate remains remarkably inviting, ideal for both locals and visitors wanting to enjoy the sunny California allure.
In San Diego, October marks a transition in precipitation patterns as the dry summer months give way to a slightly wetter fall season. With 13 mm (0.5 in) of rainfall spread over two days, October features a modest increase compared to the parched conditions of the summer, where rain is virtually absent. This uptick prepares the region for the incoming winter months, as November and December significantly raise the precipitation stakes with their corresponding totals of 24 mm (0.9 in) and 60 mm (2.4 in). Overall, October serves as a gentle reminder of the shifting seasons, offering just enough rain to nourish the landscape before the wetter winter months arrive.
In October, San Diego experiences a noticeable shift in humidity, with levels rising to 58% after a gradual decrease through the summer months. From a peak of 77% in February, the humidity has consistently dropped, reaching its annual low of 42% in August. However, as fall sets in, there's a slight uptick, marking a transition toward the wetter months ahead. This trend reflects the region's unique climate, where the dryness of summer gives way to a more comfortable atmosphere in autumn, preparing residents for the increased moisture that winter brings, as seen with November's humidity climbing to 66%.
As October rolls into San Diego, the UV Index settles at 7, indicating high exposure levels where unprotected skin can burn in as little as 25 minutes. This reflects a gradual decrease from the extreme levels seen over the summer months, where the index peaked at 11, resulting in a mere 10-minute burn time. In comparison to September, which also had a UV Index of 10, October offers a slight reprieve, allowing for a bit more time outdoors without immediate risk. Despite this dip, it's still essential to remain cautious under the sun; savvy sun-seekers should continue to protect their skin as the days shorten and temperatures cool. For more detailed information, check out the San Diego UV Index.
UV Risk Categories
October in San Diego marks a transitional month where summer’s glow begins to fade but still offers a generous 297 hours of sunshine. Following the sunniest months of July and June, which boast impressive totals of 376 and 366 hours respectively, October continues to provide ample sunlight, albeit with a notable decrease. This trend signifies the gradual shift towards cooler weather, as the days grow shorter but still maintain the warmth synonymous with Southern California. As the city transitions into fall, the sun-drenched days of October serve as a beautiful reminder of the summer just passed, inviting locals and visitors alike to revel in the remaining golden hours before the more subdued months of November and December approach.
In San Diego, October heralds a delightful embrace of sunshine, boasting a 64% chance of clear skies. This marks a notable peak in sunlit days compared to the months that precede it, such as the 42% in May and 47% in June. As summer winds down, the city's weather begins to shift, with an upward trend in sunshine likely influenced by a late burst of warmth. With October's climate favoring outdoor activities, it's an ideal time for both locals and visitors to revel in the city's natural beauty before the cooler months arrive. As the year progresses into November, the likelihood of sunny days remains steady at 63%, suggesting that San Diego comfortably maintains its reputation for pleasant weather even as fall sets in.
In October, San Diego experiences a decline in daylight, with the sun shining for approximately 11 hours each day. This month marks a transition from the peak of summer, where daylight reached 14 hours in June and July, down to the more moderate durations of fall and winter. As the days shorten, we bid farewell to the long, sunlit evenings of the summer months and embrace the cozy ambiance of autumn. The pattern of decreasing daylight is consistent, starting from 14 hours in the height of summer and tapering to 10 hours by December. This gradual shift highlights how San Diego’s inviting climate evolves throughout the year, offering a unique charm in every season.
As October settles in San Diego, the city experiences a gentle breeze with an average wind speed of 2.8 m/s (6 mph). This marks a subtle decline from the more consistent winds of the summer months, where speeds hovered around 3.1 m/s (7 mph). Following the warmer season, October's winds offer a refreshing touch as the city transitions into the cooler fall months. Notably, the trend continues into November, where the winds soften further to 2.4 m/s (5 mph), hinting at the tranquil beauty of autumn in the region. With these gradual shifts, October embodies a serene, breezy period that perfectly complements San Diego's picturesque coastal vibe.
The weather in San Diego changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in San Diego and find detailed weather information for every month.
October and January present contrasting weather patterns. In October, temperatures range from a minimum of 13°C (55°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F). The month sees relatively low precipitation, totaling only 13 mm (0.5 in) over about 2 days, and a comfortable humidity level of 58%. In contrast, January experiences cooler conditions, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 25°C (77°F) and an average of 14°C (58°F). This month is notably wetter, with 45 mm (1.8 in) of precipitation spread over 5 days and higher humidity at 72%. For a detailed look at the winter weather, check out San Diego weather in January.
October and February showcase stark contrasts in weather patterns. In October, temperatures range from a mild 13°C (55°F) at night to a warm 32°C (90°F) during the day, with an average of 20°C (68°F). The month typically experiences low precipitation, with only about 13 mm (0.5 in) of rain spread over just 2 days and a comfortable humidity level of 58%. In contrast, February is cooler, with minimum temperatures around 7°C (45°F) and maximums reaching 26°C (79°F), averaging 14°C (57°F). This winter month sees increased rainfall, totaling 55 mm (2.2 in) over approximately 6 days, and a higher humidity of 77%. For more information on the weather in February, check out San Diego weather in February.
October weather is generally warmer than March, with average temperatures reaching around 20°C (68°F) compared to March's average of 15°C (59°F). October typically sees maximum temperatures soaring up to 32°C (90°F), while March peaks at a milder 26°C (80°F). Additionally, October has lower humidity at 58% and significantly less precipitation, accumulating only 13 mm (0.5 in) over just 2 days. In contrast, March experiences a wetter climate with 38 mm (1.5 in) of rainfall across 8 days and higher humidity levels at 67%. For more detailed information, you can check San Diego weather in March.
In comparing the weather of October and April, October typically enjoys slightly warmer temperatures, with an average of 20°C (68°F) compared to April's 16°C (61°F). Both months experience a similar number of rainy days, but October brings less precipitation overall, with just 13 mm (0.5 in) compared to April's 20 mm (0.8 in). Humidity levels are quite close as well, hovering around 58% in October and 56% in April. For more details on temperatures and conditions during this transitional month, check out San Diego weather in April.
In October, the weather in San Diego typically features a wider temperature range, with minimums around 13°C (55°F) and maximums reaching as high as 32°C (90°F), allowing for warm and pleasant days. In contrast, May tends to be cooler, with an average of 17°C (62°F) and maximum temperatures peaking at 25°C (78°F). Both months experience relatively low precipitation, though October sees less rain overall with only 13 mm (0.5 in) compared to May's 16 mm (0.6 in), but May has more rainy days, averaging four. Additionally, October has a higher humidity level at 58%, while May enjoys a drier atmosphere with 46% humidity. For a detailed look at San Diego's climate during this month, check out San Diego weather in May.
October and June present distinct contrasts in weather patterns. In October, temperatures range from a minimum of 13°C (55°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F) and a moderate humidity level of 58%. Precipitation is slightly more frequent, with about 13 mm (0.5 in) falling over 2 days. In contrast, June boasts mild temperatures, with a minimum of 14°C (58°F) and a maximum of 29°C (84°F), averaging at 18°C (65°F) and a lower humidity of 48%. Additionally, June is notably drier, receiving only 2 mm (0.1 in) of precipitation over no rainy days. For more insights on June's climate, you can check San Diego weather in June.
October and July in San Diego offer distinct weather experiences. In October, temperatures range from a minimum of 13°C (55°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F). This month sees a slight increase in precipitation, averaging 13 mm (0.5 in) over two days, and a humidity level of 58%. In contrast, July enjoys warmer minimum temperatures of 16°C (62°F) and a maximum of 29°C (85°F), with an average of 21°C (69°F), and impressively, just 1 mm (0.1 in) of precipitation, experienced on no days, resulting in lower humidity at 46%. For more details on July’s weather, check out San Diego weather in July.
In comparing the weather of October and August, October tends to offer a wider range of temperatures, from a minimum of 13°C (55°F) to a maximum of 32°C (90°F), with an average temperature of 20°C (68°F). While it experiences slightly higher humidity at 58%, precipitation is relatively low, averaging 13 mm (0.5 in) over just 2 days. In contrast, August is relatively warmer, with a minimum temperature of 17°C (63°F) and a maximum of 29°C (84°F), leading to an average of 21°C (71°F). Notably, August enjoys dry conditions with virtually no precipitation—just 1 mm—and lower humidity at 42%. For more details on August weather, you can check San Diego weather in August.
In October, temperatures range from a minimum of 13°C (55°F) to a maximum of 32°C (90°F), averaging around 20°C (68°F). The month experiences some precipitation, with 13 mm (0.5 in) spread across 2 days, contributing to a humidity level of 58%. In contrast, September offers slightly warmer temperatures, with a minimum of 17°C (62°F), an average of 21°C (70°F), and a maximum of 31°C (88°F). Notably, September is much drier, recording only 3 mm (0.1 in) of precipitation over the entire month with no rainy days, resulting in lower humidity at 52%. For more detailed insights on September weather, you can check San Diego weather in September.
In October, temperatures in the area range from a minimum of 13°C (55°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F). The month sees relatively low precipitation, with only 13 mm (0.5 in) falling over just two days, and humidity levels sit at 58%. In contrast, November experiences slightly cooler temperatures, with a minimum of 10°C (51°F), an average of 17°C (63°F), and a maximum of 27°C (81°F). The precipitation increases to 24 mm (0.9 in), also spread over two days, and humidity rises to 66%. For more detailed information on November's climate, visit San Diego weather in November.
In October, the weather is generally warmer with temperatures ranging from a minimum of 13°C (55°F) to a maximum of 32°C (90°F), while December sees cooler temperatures with a minimum of 8°C (47°F) and a maximum of 24°C (76°F). October experiences relatively low precipitation at just 13 mm (0.5 in) over 2 days, whereas December is much wetter, averaging 60 mm (2.4 in) over 5 days. Additionally, humidity levels are higher in December at 74%, compared to October's 58%, making the latter feel more comfortable. For more details on December weather, check out San Diego weather in December.
As October arrives in San Diego, residents and visitors alike can enjoy a delightful transition in weather, where the sweltering summer heat gradually gives way to more moderate temperatures. With average highs around a comfortable 20°C (68°F) and minimal rainfall—typically just two days of light drizzle—this month offers the perfect backdrop for outdoor activities without the oppressive humidity often felt in the peak summer months. The coastal breezes keep the atmosphere pleasant, making October a prime time to explore the city’s stunning beaches and vibrant attractions. For a deeper understanding of San Diego’s unique climate throughout the year, check out San Diego Climate.