July Weather in San Diego, Mexico

Last updated: April 22, 2025

July in San Diego, Mexico, offers a warm and inviting climate, with maximum temperatures reaching up to 31°C (89°F) and an average temperature of 20°C (69°F). While the heat is enticing, visitors should also prepare for 160 mm (6.3 inches) of precipitation spread over 20 days, contributing to a humidity level of 67%. This month presents a blend of sun-soaked days and refreshing rainfall, making it an intriguing time to explore the vibrant landscapes and cultural offerings of San Diego.

July Temperature in San Diego

In July, San Diego, Mexico, experiences a delightful summer climate with temperatures that generally range from a minimum of 12°C (54°F) to a maximum of 31°C (89°F). The average temperature hovers around 20°C (69°F), offering a comfortable warmth perfect for beach outings and outdoor adventures. This month marks a subtle shift from the sweltering heights of late spring, displaying a pattern where maximum temperatures begin to slightly decline, while the consistent warmth persists. With these pleasant summer conditions, residents and tourists alike can enjoy a range of activities under the sun, capitalizing on the inviting atmosphere that defines this coastal paradise.

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

The chart illustrates July 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.
JanFebMarAprMayJunJulAugSepOctNovDec596369727471686967666359
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.

July Precipitation in San Diego

In July, San Diego, Mexico experiences a significant uptick in precipitation, reaching 160 mm (6.3 in), making it one of the wettest months of the year. This increase follows June's already substantial rainfall of 156 mm (6.2 in), highlighting a trend of intensified summer showers. With 20 days of rainfall, July not only brings the heaviest downpours but also reveals a shift towards more frequent precipitation compared to earlier months, such as May and June, which had only 6 and 15 rainy days respectively. This pattern sets the stage for a lush and vibrant landscape as the region basks in the moisture of the summer season, marking a definitive transition into the peak of its rainy period.

July Precipitation Trends in San Diego

The chart displays monthly precipitation patterns in San Diego, with values for each month alongside July's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec46733615716014514748164
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in San Diego

In San Diego, Mexico, the humidity levels reveal a distinctive pattern throughout the year. Starting at a high 74% in January, the climate gradually becomes less humid, reaching its lowest point of 58% in both March and April. As summer approaches, June sees a spike to 76%, but by July, humidity stabilizes at 67%. This slight decrease allows for a more comfortable atmosphere, yet the trend resumes its upward trajectory in the following months, culminating in the most humid periods from September to November, where levels soar to 81% and beyond. This dynamic showcases the region’s shift from a drier spring to a more humid late summer and fall, providing a unique experience throughout the year.

July Average Humidity in San Diego

This chart illustrates the average monthly humidity levels in San Diego, with July's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how July's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec74%65%58%58%67%76%67%68%81%83%84%81%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in San Diego

In July, San Diego, Mexico, experiences an UV Index of 14, categorized as extreme. This reflects a continued trend from the previous months, where the UV levels have been notably high, reaching their peak at 15 in April and May. The burn time remains short, at just 10 minutes, emphasizing the need for vigilant sun protection. As summer progresses, the consistent extreme exposure highlights the importance of outdoor safety measures. With UV levels expected to stay high into August and September, visitors and residents alike should stay informed about the solar impact. For more detailed insights on UV levels throughout the year, check out San Diego UV Index.

Maximum UV Index Levels in San Diego for July

The chart shows the monthly maximum UV Index (UVI) for San Diego in July, 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.
JanFebMarAprMayJunJulAugSepOctNovDec9111415151414141412108
Data source: San Diego July 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.

July Sunshine in San Diego

In July, San Diego basks in a delightful 332 hours of sunshine, making it a spectacular time for outdoor adventures and beach relaxation. This vibrant month falls right in the heart of a trend where the city enjoys its sunniest days as summer peaks. Following a gradual increase in sunlight from 235 hours in January to 345 hours in May, there's a slight dip in June, but July quickly regains its shine. As the summer heat continues, August follows closely with 327 hours, ensuring that the sunny vibes linger. Overall, the months from March through August highlight a consistent abundance of sunshine, perfect for soaking up the rays in this beautiful coastal city.

Monthly Sunshine Duration in San Diego: July Highlighted

The July sunshine duration represents the total number of hours San Diego experiences direct sunlight during the month of July, excluding cloudy or obstructed periods. This chart compares the sunshine duration of July with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec235h271h320h326h345h319h332h327h295h293h283h288h
Data source: San Diego July Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Diego During July

When considering the likelihood of sunny weather in July in San Diego, Mexico, the outlook isn’t particularly bright, with only a 25% chance of sunshine. This marks a notable dip compared to earlier months, such as February with a remarkable 88% and March at 79%. The overall trend indicates that June and July typically see increased cloud cover and potential rain, contrasting sharply with the sun-soaked days of late winter and early spring. As the summer progresses into August, there’s a slight uptick to 40%, but July remains one of the cloudiest months of the year in this coastal locale, reminding visitors to be prepared for less-than-ideal beach weather.

Percentage of Sunny Days in July in San Diego

The chart illustrates the percentage of sunny days in San Diego throughout the year, with July 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.
JanFebMarAprMayJunJulAugSepOctNovDec62%88%79%68%63%24%25%40%24%45%65%73%
Data source: San Diego July chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Diego in July

In San Diego, Mexico, July shines brightly with 13 hours of daylight, mirroring the length seen throughout June. The summer months optimally extend the sun's embrace, allowing for longer days that invite outdoor adventures and relaxation under the sky. As spring transitions into summer, daylight begins to rise from 12 hours in March and April, peaking in July before gradually tapering off toward the autumn months. This pattern emphasizes the region's distinctive seasonal rhythm, showcasing an inviting lifestyle accentuated by plentiful sunlight during the height of summer, fostering a vibrant atmosphere for both locals and visitors alike.

Average Daylight Hours in San Diego for July

The chart illustrates the variation in daylight duration in San Diego throughout the year, with July highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h11h 27m12h 2m12h 38m13h 8m13h 22m13h 14m12h 48m12h 13m11h 37m11h 7m10h 51m
Data source: San Diego daylight hours, calculated by summing the hours between sunrise and sunset for each day.

July Winds in San Diego

In July, San Diego, Mexico, experiences a gentle breeze with an average wind speed of 2.1 m/s (5 mph), marking a slight decline from the more consistent gusts in the spring months. This dip follows a gradual peak in April, where winds reached 2.9 m/s (7 mph), suggesting that summer brings a more tranquil atmosphere ideal for relaxation. Throughout the summer, August sees a slight recovery with winds returning to 2.5 m/s (5 mph), hinting at a seasonal rhythm that gives way to calmer skies. As the year progresses into the fall months, wind speeds fluctuate further, illustrating San Diego’s generally mild climate and the serenity it offers to both residents and visitors alike.

Average July Wind Speed in San Diego

The chart displays monthly wind speed patterns in San Diego, with values for each month shown alongside July's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how July's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.32.72.62.92.52.52.1 m/s2.51.92.12.31.9
Data source: San Diego July wind data, generated using information from the Copernicus Climate Change Service.

How July 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 July'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.

When comparing the weather in July and January, one can see a significant contrast. July experiences a much broader temperature range, with minimums around 12°C (54°F) and maximums peaking at 31°C (89°F), leading to an average of 20°C (69°F). This month also sees ample precipitation, with about 160 mm (6.3 in) over approximately 20 days, contributing to a relatively humid environment at 67%.

In stark contrast, January presents milder conditions, with minimum temperatures dropping to around 2°C (36°F) and maximums reaching 29°C (84°F), resulting in an average of 15°C (59°F). Precipitation is significantly lower in January, with only about 4 mm (0.2 in) spread over just one day, while humidity remains slightly higher at 74%. For more detailed information, you can visit San Diego weather in January.

When comparing the weather in July and February, significant differences emerge. July boasts warmer temperatures, with a minimum of 12°C (54°F) and an average of 20°C (69°F), reaching maximums of 31°C (89°F). It also experiences higher precipitation, with 160 mm (6.3 in) spread over about 20 days, contributing to a humidity level of 67%. In stark contrast, February offers milder conditions, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 31°C (88°F), and an average of 17°C (64°F). This month is notably drier, with only 6 mm (0.2 in) of rainfall occurring on just 1 day, and a slightly lower humidity of 65%. For a deeper exploration of February's climate, you can check out San Diego weather in February.

When comparing the weather in July and March, notable differences emerge. July experiences warmer temperatures with a minimum of 12°C (54°F), an average of 20°C (69°F), and a maximum of 31°C (89°F). However, it also sees significant precipitation, averaging 160 mm (6.3 in) over approximately 20 days, accompanied by a humidity level of 67%. In contrast, March features a cooler minimum of 5°C (41°F) and a similar average of 20°C (69°F), but it can reach a slightly higher maximum of 33°C (92°F). March is characterized by minimal rainfall, with only about 7 mm (0.3 in) over just 2 days and lower humidity at 58%. For a deeper insight into weather patterns during this month, you can visit San Diego weather in March.

In comparing the weather between July and April, we observe notable differences in both temperature and precipitation. July typically sees a temperature range from a minimum of 12°C (54°F) to a maximum of 31°C (89°F), with an average of 20°C (69°F). During this month, the area experiences significant rainfall, totaling 160 mm (6.3 in) over approximately 20 days, accompanied by humidity levels around 67%. In contrast, April boasts a warmer average temperature of 22°C (72°F), with extremes reaching from a low of 8°C (46°F) to a high of 35°C (95°F). However, precipitation is minimal, with only 3 mm (0.1 in) recorded, and rain is rare as there are no rainy days. This results in a lower humidity level of 58%. For more detailed insights, you can check San Diego weather in April.

When comparing the weather in July and May, notable differences emerge. July typically experiences milder temperatures, with an average of 20°C (69°F) and a maximum reaching 31°C (89°F), while May often sees warmer conditions with an average of 23°C (74°F) and highs that can soar to 36°C (97°F). Precipitation in July is significantly higher at 160 mm (6.3 in) over approximately 20 days, contrasting sharply with May's much drier climate, which registers only 36 mm (1.4 in) across just 6 days. Humidity levels remain consistent at 67% for both months, making the atmosphere feel similar in terms of moisture. For a closer look at the weather in May, you can check San Diego weather in May.

In comparing the weather of July and June, it is evident that both months experience relatively mild minimum temperatures, with July registering a low of 12°C (54°F) and June matching that. However, June boasts a higher average temperature of 22°C (72°F) compared to July's 20°C (69°F), with June's maximum temperature reaching a hotter 36°C (97°F) versus July's peak of 31°C (89°F). Precipitation levels are similar, with July receiving slightly more rainfall at 160 mm (6.3 in) over 20 days, compared to June's 156 mm (6.2 in) over 15 days. Notably, humidity is higher in June at 76%, while July sees a decrease to 67%. For a closer look at June weather conditions, check out San Diego weather in June.

In July, temperatures range from a minimum of 12°C (54°F) to a maximum of 31°C (89°F), with an average of 20°C (69°F). The month experiences significant rainfall, totaling 160 mm (6.3 in) across 20 days, while humidity levels are around 67%. In contrast, August maintains similar temperature patterns, with the same minimum and average temperatures but a slight decrease in the maximum, reaching 31°C (88°F). Precipitation in August is slightly lower at 145 mm (5.7 in) over 17 days, and humidity rises marginally to 68%. Overall, both months exhibit warm temperatures, but August tends to be a bit drier than July. For further insights into the summer climate, check out San Diego weather in August.

In July, temperatures range from a minimum of 12°C (54°F) to a maximum of 31°C (89°F), with an average temperature of 20°C (69°F). This month receives approximately 160 mm (6.3 in) of precipitation over 20 days, accompanied by a humidity level of 67%. In contrast, September experiences slightly cooler temperatures, with a minimum of 9°C (49°F) and an average of 20°C (68°F), while still peaking at 31°C (88°F). The precipitation in September is marginally lower, at 147 mm (5.8 in), occurring over 17 days, but humidity rises to 81%. For a more detailed look at September weather, you can refer to San Diego weather in September.

In July, the weather tends to be warmer with a minimum temperature of 12°C (54°F) and an average of 20°C (69°F), reaching a maximum of 31°C (89°F). However, July is also marked by higher precipitation levels, receiving about 160 mm (6.3 in) over approximately 20 days, combined with a humidity of 67%. In contrast, October experiences cooler temperatures, with a minimum of 6°C (43°F) and an average of 19°C (67°F), while still peaking at 31°C (89°F). Notably, October sees significantly less rainfall, averaging only 48 mm (1.9 in) over 8 days, though it has a higher humidity level of 83%. For more detailed information, you can check San Diego weather in October.

When comparing the weather in July and November, notable differences emerge. July features a broader temperature range with minimums around 12°C (54°F) and maximums peaking at 31°C (89°F), maintaining an average of 20°C (69°F). This month also experiences significant rainfall, with 160 mm (6.3 in) spread over approximately 20 days, creating a relatively humid environment at 67%.

In contrast, November sees cooler temperatures, with a minimum of 2°C (36°F) and an average of 17°C (63°F), while maximums still reach up to 30°C (87°F). Rainfall is much lighter in November, totaling just 16 mm (0.6 in) over only 2 days, yet humidity rises to 84%, making the air feel quite damp. For further details, you can check San Diego weather in November.

In July, the weather is characterized by warmer temperatures, with a minimum of 12°C (54°F) and an average of 20°C (69°F), peaking at a maximum of 31°C (89°F). The month experiences significant rainfall, accumulating 160 mm (6.3 in) over approximately 20 days, accompanied by a humidity level of 67%. In contrast, December sees much cooler temperatures, with a minimum of 1°C (34°F) and an average of 15°C (59°F), reaching a maximum of 29°C (84°F). Rainfall in December is minimal, averaging just 4 mm (0.1 in) over only one day, while humidity rises to 81%. For more detailed information, check out San Diego weather in December.

Compare San Diego's Climate with Cities Worldwide

Conclusion: What to Expect From July Weather in San Diego

In July, San Diego experiences a distinct shift in weather compared to other months, boasting warmer temperatures and increased humidity. This month brings a peak in warmth with daytime highs often reaching the low 30s°C, inviting residents and visitors to enjoy sunny outdoor activities. However, the rise in humidity to around 67% and frequent precipitation—occurring on nearly two-thirds of the month—adds a layer of tropical flair to the coastal climate. While the evenings are typically mild, the blend of heat and moisture makes July a unique and dynamic month in San Diego's annual weather cycle. For a deeper dive into the region's climate patterns, be sure to check out San Diego Climate.