October Weather in San Diego, Mexico

Last updated: April 22, 2025

In October, San Diego, Mexico experiences a dynamic climate characterized by a maximum temperature of 36°C (97°F) and an average of 27°C (80°F), making it a warm and inviting destination. However, evenings can be quite cool, with a minimum temperature dropping to 16°C (62°F). As the month progresses, visitors can expect significant rainfall, with a total precipitation of 129 mm (5.1 in) occurring over 21 days, leading to a high humidity level of 87%. This blend of warmth and moisture contributes to a vibrant atmosphere, ideal for those seeking to experience the lush beauty of the region.

October Temperature in San Diego

As October rolls in, San Diego, Mexico, showcases a shift towards cooler temperatures, with a minimum of 16°C (62°F) and an average of 27°C (80°F). This month marks a transition, stepping down from the peak heat of summer, with maximum temperatures reaching around 36°C (97°F). The gradual drop in both minimum and maximum temperatures, contrasting with the sizzling highs of April and May, brings a refreshing backdrop for outdoor activities. With delightful weather persisting throughout the month, visitors can enjoy San Diego's vibrant culture and stunning landscapes in a comfortable climate that perfectly balances warmth and coolness.

October Weather in San Diego: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in San Diego, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec747880838482838382807775
Data source: Temperature data for San Diego generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in San Diego

October in San Diego, Mexico, marks a significant uptick in precipitation, with rainfall reaching 129 mm (5.1 in) over 21 days. This makes it one of the wetter months of the year, following a steady increase from September, which also boasted impressive rainfall at 128 mm (5.0 in). As the region transitions into fall, October's rainfall not only contributes to the lush landscape but also signals the tail end of the rainy season that peaks during the summer months. The pattern shows a gradual rise in precipitation from May through October, with July and August standing out as particularly wet months, combining to set the stage for October's robust totals. Overall, October's weather captures the essence of a vibrant, sun-soaked locale, drenched in the beauty of autumnal rains.

October Precipitation Trends in San Diego

The chart displays monthly precipitation patterns in San Diego, with values for each month alongside October's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec301082654192681031281295325
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in San Diego

As October rolls into San Diego, Mexico, residents and visitors can expect higher humidity levels that mark the transition into the heart of the rainy season. With humidity peaking at 87%, October stands out as one of the most humid months of the year, following closely on the heels of September's 85%. This noticeable uptick in moisture in the air signals a shift from the drier months of summer, where humidity reached a low of 62% in June and gradually climbed throughout the warmer months. November and December maintain the trend with 88% humidity, emphasizing that autumn in San Diego is synonymous with a lush, tropical feel. This consistent pattern reflects the region's unique climate, where the warmth of the preceding months gives way to dampness, enriching the environment and enhancing the vibrant landscape.

October Average Humidity in San Diego

This chart illustrates the average monthly humidity levels in San Diego, with October's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how October's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec85%80%69%64%63%62%65%78%86%87%88%88%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in San Diego

In October, San Diego, Mexico, continues to experience extreme UV Index levels, registering at 11. This marks a slight decline from the peak of 13 seen during the summer months, yet caution remains essential as the burn time shortens to just 10 minutes. As the year progresses from the harsh summer, the UV intensity begins to taper, although it's still crucial for sun seekers to stay vigilant and protected against harmful rays. With the overall trend in the region showing consistently high UV levels throughout the year, October's ratings reflect a persistent need for sun safety practices. For more detailed information, visit San Diego UV Index.

Maximum UV Index Levels in San Diego for October

The chart shows the monthly maximum UV Index (UVI) for San Diego in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec911131313131312121198
Data source: San Diego October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

October Sunshine in San Diego

October in San Diego, Mexico, brings a delightful blend of sunshine, offering 275 hours of bright days that seamlessly transition from the summer heat. This month maintains a comfortable glow following the peak sunshine of the year in May with 328 hours, while still enjoying higher sunlight compared to the winter months ahead. As we move from the vibrant summer, the decrease in hours from September's 291 hours to October’s totals reflects the gentle shift into fall. The consistent sunshine through the year highlights San Diego’s charm, making each day an invitation to explore its stunning beaches and outdoor activities, even as the twilight of November approaches with 282 hours of daylight. Overall, October epitomizes the sun-kissed allure of this coastal paradise, blending warmth and beauty just before the cooler months arrive.

Monthly Sunshine Duration in San Diego: October Highlighted

The October sunshine duration represents the total number of hours San Diego experiences direct sunlight during the month of October, excluding cloudy or obstructed periods. This chart compares the sunshine duration of October with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec224h270h316h312h328h271h316h314h291h275h282h288h
Data source: San Diego October Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Diego During October

In San Diego, Mexico, October offers a moderately sunny outlook, with a 47% chance of clear skies. While this represents a slight dip from the higher probabilities found in the spring months, it shows a recovery from the cloudier summer, where chances fell as low as 30% in June. This trend suggests that, as the year progresses toward the end, the likelihood of sunshine tends to stabilize, with November and December boasting even higher chances of 58% and 63% respectively. For those planning outdoor activities, October presents a pleasant opportunity to enjoy the developing autumn weather before the winter sun takes over.

Percentage of Sunny Days in October in San Diego

The chart illustrates the percentage of sunny days in San Diego throughout the year, with October highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often San Diego experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec41%62%66%57%41%30%42%50%32%47%58%63%
Data source: San Diego October chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Diego in October

In October, San Diego experiences a return to 11 hours of daylight, echoing the consistent pattern seen in January and February. This month marks a transition as daylight begins to wane after the summer months, where the peak of 13 hours was enjoyed from May through July. Interestingly, as the seasons change, daylight decreases gradually, dropping to 12 hours in August and September before settling at its autumnal level. This cyclical ebb and flow of daylight not only enhances the beauty of San Diego’s scenery but also signals the preparation for the cooler months ahead, inviting residents and visitors alike to savor the golden hours of fall.

Average Daylight Hours in San Diego for October

The chart illustrates the variation in daylight duration in San Diego throughout the year, with October highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 4m11h 29m12h 2m12h 36m13h 4m13h 17m13h 10m12h 45m12h 13m11h 39m11h 10m10h 56m
Data source: San Diego daylight hours, calculated by summing the hours between sunrise and sunset for each day.

October Winds in San Diego

As October sweeps into San Diego, Mexico, a noticeable shift in the winds marks the transition into fall. The average wind speed dips to 1.7 m/s (4 mph), reflecting a calmer atmosphere compared to the more blustery summer months, where winds hovered around 2.5 to 3.1 m/s (6-7 mph) from April to August. This gradual decline, beginning in September, suggests a gentle retreat of summer's vigor, making way for the cooler breezes of autumn. Local residents and visitors alike can revel in the serene October winds, which provide a perfect backdrop for outdoor activities, while the surrounding landscapes begin to don their fall colors.

Average October Wind Speed in San Diego

The chart displays monthly wind speed patterns in San Diego, with values for each month shown alongside October's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how October's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.42.83.13.13.12.82.52.42.31.7 m/s2.02.5
Data source: San Diego October wind data, generated using information from the Copernicus Climate Change Service.

How October Weather in San Diego Compares to Other Months

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.

In October, the weather is characterized by a warm climate with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 36°C (97°F) and an average of 27°C (80°F). This month is also quite wet, experiencing 129 mm (5.1 in) of precipitation over 21 days, contributing to a high humidity level of 87%. In contrast, January offers cooler temperatures, with a minimum of 11°C (52°F), an average of 23°C (75°F), and a maximum of 38°C (101°F). It also sees significantly less rainfall, only 30 mm (1.2 in) over 4 days, and maintains a slightly lower humidity of 85%. For a detailed overview of January weather, you can visit San Diego weather in January.

October and February exhibit notable differences in weather patterns. October is characterized by warmer temperatures, with a minimum of 16°C (62°F) and an average of 27°C (80°F), while February has a cooler minimum of 10°C (50°F) and an average of 25°C (78°F). Both months experience a maximum temperature of 36°C (97°F), but October is significantly wetter, receiving 129 mm (5.1 in) of precipitation over 21 days, compared to February's much drier 10 mm (0.4 in) over just 3 days. Humidity levels are slightly higher in October at 87%, while February sees a more moderate 80%. For more detailed insights, you can check San Diego weather in February.

In October, the weather tends to be warm and humid, with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 36°C (97°F). During this month, the region experiences significant rainfall, recording about 129 mm (5.1 in) over 21 days, leading to a high humidity level of 87%. In contrast, March offers a more stable climate with similar average temperatures of 27°C (80°F) but slightly higher maximums reaching up to 37°C (98°F). Precipitation is minimal in March, totaling just 8 mm (0.3 in) over a mere one day, and humidity levels drop to 69%. For a detailed look at this month's weather, check out San Diego weather in March.

In comparing the weather between October and April, October tends to feature a broader range of temperatures, with averages hovering around 27°C (80°F) and maximums reaching up to 36°C (97°F). This month also experiences significant rainfall, accumulating 129 mm (5.1 in) over 21 days, resulting in a higher humidity level of 87%. In contrast, April brings slightly warmer average temperatures at 28°C (84°F) and can peak at a sweltering 40°C (104°F). However, precipitation is much lower, with only 26 mm (1.0 in) falling over just 5 days, and humidity levels decreasing to 64%. For more details on April weather, you can check San Diego weather in April.

In comparing the weather of October and May, October presents a slightly cooler climate, with average temperatures ranging from a minimum of 16°C (62°F) to a maximum of 36°C (97°F). The month sees a high level of precipitation, totaling 129 mm (5.1 in) over 21 days, resulting in an increased humidity level of 87%. In contrast, May offers warmer temperatures, with an average range from a minimum of 18°C (65°F) to a peak of 39°C (102°F), but with significantly less rainfall at 54 mm (2.1 in) over just 9 days and a lower humidity of 63%. For a more detailed look at the conditions, check out San Diego weather in May.

When comparing the weather in October and June, it’s evident that both months offer warm temperatures but with notable differences. October sees minimum temperatures of 16°C (62°F) and averages around 27°C (80°F), peaking at 36°C (97°F). This month also experiences higher humidity at 87% and significant precipitation, measuring 129 mm (5.1 in) over approximately 21 days. In contrast, June starts warmer with minimum temperatures of 22°C (72°F) and averages slightly cooler at 28°C (83°F), reaching a maximum of 38°C (101°F). Despite its higher average temperature, June has less humidity at 62% and slightly more precipitation at 192 mm (7.5 in) over about 17 days. For a detailed look at June weather, visit San Diego weather in June.

When comparing the weather in October and July, October tends to be slightly cooler, with average temperatures ranging from a minimum of 16°C (62°F) to a maximum of 36°C (97°F). In contrast, July's temperatures are higher, with a minimum of 22°C (72°F) and a maximum reaching 38°C (100°F). Precipitation levels also differ significantly; October experiences more rain with 129 mm (5.1 in) over 21 days, while July sees only 68 mm (2.7 in) across 14 days. Additionally, October is notably more humid at 87%, compared to July’s 65%. For more insights on July weather, you can check San Diego weather in July.

In comparing the weather of October and August, October presents a slightly cooler temperature range, with minimums around 16°C (62°F) and maximums reaching 36°C (97°F), while August typically remains warmer, with lows of 21°C (71°F) and highs of 37°C (99°F). August averages a comfortable 28°C (83°F), just a notch above October's average of 27°C (80°F). While both months experience precipitation, October is wetter, with 129 mm (5.1 in) over 21 days, compared to August's 103 mm (4.1 in) spread across 18 days. Additionally, humidity levels in October are higher at 87%, compared to August's 78%. For a more detailed look at August conditions, check out the link: San Diego weather in August.

In comparing the weather between September and October, we see some noticeable differences. October features a lower minimum temperature of 16°C (62°F) and an average of 27°C (80°F), while September remains warmer with a minimum of 22°C (71°F) and an average of 28°C (82°F). Both months experience similar maximum temperatures, with October peaking at 36°C (97°F) and September reaching 37°C (98°F). Precipitation levels are comparable, with October recording 129 mm (5.1 in) over 21 days and September slightly less at 128 mm (5.0 in) for the same number of days. Additionally, October's humidity is slightly higher at 87%, compared to September's 85%. For more details on September's weather, you can visit San Diego weather in September.

October and November present contrasting weather patterns, with October enjoying warmer temperatures and higher humidity. In October, daily temperatures range from a minimum of 16°C (62°F) to an average of 27°C (80°F), peaking at a maximum of 36°C (97°F), accompanied by significant rainfall of 129 mm (5.1 in) over 21 days. In contrast, November cools slightly, with temperatures dipping to a minimum of 13°C (55°F) and averaging 25°C (77°F), while maximum temperatures reach 34°C (93°F). Rainfall also decreases considerably to 53 mm (2.1 in) over just 11 days, and humidity remains consistently high at 88%. For more details, you can check San Diego weather in November.

In October, the weather is typically warmer, with temperatures ranging from a minimum of 16°C (62°F) to a scorching maximum of 36°C (97°F). This month also experiences significant rainfall, averaging 129 mm (5.1 in) over approximately 21 days, and humidity levels remain high at 87%. In contrast, December presents a cooler climate, with temperatures varying from a minimum of 10°C (51°F) to a maximum of 34°C (93°F) and a more moderate average of 24°C (75°F). Rainfall decreases dramatically to just 25 mm (1.0 in) spread over 5 days, while humidity remains relatively stable at 88%. For more information, you can explore San Diego weather in December.

Compare San Diego's Climate with Cities Worldwide

Conclusion: What to Expect From October Weather in San Diego

October in San Diego presents a unique blend of warmth and humidity, distinguishing it from other months. While the temperatures remain pleasantly mild on average, the increased rainfall and elevated humidity levels mark a transition towards the wetter season. This month’s frequent showers, occurring over 21 days, bring a refreshing change, enhancing the lushness of the landscape. As the summer heat begins to wane, October offers a more temperate experience, making it ideal for outdoor explorations. For a deeper understanding of the city's climate dynamics, check out San Diego Climate.