July Weather in San Diego, Mexico

Last updated: April 22, 2025

Experience the vibrant July weather in San Diego, Mexico, where daytime temperatures can soar to a sizzling 38°C (100°F), while the average hovers around a comfortable 28°C (83°F). At night, the temperature cools down to a pleasant 22°C (72°F), offering a welcome respite from the heat. This month also sees an average precipitation of 68 mm (2.7 in), with rain gracing the region on approximately 14 days, lending to the lush, tropical ambiance. With humidity levels at 65%, prepare for a mix of warm sunshine and refreshing rain, making July an intriguing and dynamic month to enjoy in this coastal paradise.

July Temperature in San Diego

In July, San Diego, Mexico, experiences warm and inviting temperatures, perfect for summer activities. The month starts with minimums around 22°C (72°F) at night, ensuring pleasant evenings for outdoor gatherings. The average temperature remains consistent at 28°C (83°F), while daytime highs peak at a comfortable 38°C (100°F), slightly lower from the sizzling maximums seen in prior months. As summer progresses, these temperatures reflect a stable warmth, making July an ideal time for beach outings and enjoying the vibrant culture of the region, with cooler evenings offering a delightful respite from the daytime heat.

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.
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.

July Precipitation in San Diego

In July, San Diego, Mexico, experiences a significant uptick in precipitation, receiving approximately 68 mm (2.7 in) of rain over 14 days. This marks a continuation of the wet season that began in June, which saw a much heavier 192 mm (7.5 in) of rainfall, and sets the stage for even more rain in the coming months, particularly in August with 103 mm (4.1 in) expected. The rise in precipitation in July aligns with the trend of increasing rainfall throughout the summer months, creating a shift from the drier start of the year, where January and February recorded only 30 mm (1.2 in) and 10 mm (0.4 in), respectively. As the landscape thrives under this increased moisture, July acts as a pivotal point in San Diego's annual climate cycle, leading into the wetter heart of the year.

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.
JanFebMarAprMayJunJulAugSepOctNovDec301082654192681031281295325
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 July, San Diego, Mexico, experiences a modest humidity level of 65%, a slight increase from the drier months of May and June. This mid-summer humidity sets the stage for warmer days, contributing to the region's vibrant tropical atmosphere. Interestingly, while July's humidity is relatively low compared to the more humid months that follow, it marks the beginning of a gradual rise that peaks in late summer, specifically in August with 78% humidity. Notably, the year starts and concludes with the highest humidity levels, particularly in November and December, reaching 88%. This consistency underscores San Diego’s character as a place that transitions from crisp winters to sultry summers, offering a dynamic 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.
JanFebMarAprMayJunJulAugSepOctNovDec85%80%69%64%63%62%65%78%86%87%88%88%
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, continues its streak of extreme UV exposure, with a consistent UV Index of 13. This level indicates that unprotected skin can burn in just 10 minutes, necessitating heightened precautions for sun seekers. Following the trend set since February, when the index first reached extreme levels, the coastal paradise remains a hotspot, emphasizing the need for sun protection as the summer progresses. As August approaches, residents and visitors alike should remain vigilant, as the UV Index will likely remain elevated. For detailed information on how to stay safe under the sun, check out the 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.
JanFebMarAprMayJunJulAugSepOctNovDec911131313131312121198
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 the heart of summer, July in San Diego shines bright with 316 hours of glorious sunshine, perfectly paralleling the sunny vibes of May and August. Interestingly, the month stands out amidst a gradual decline from the earlier months of spring, which enjoy a peak in brightness, with March leading at 316 hours. The overall trend shows that after a peak in late spring, summer months maintain a healthy level of sunlight, striking a harmonious balance between warmth and vibrancy. As the days lengthen, San Diego embraces the essence of summer, making it an ideal time for both locals and visitors to soak up the sun's rays and enjoy everything the beautiful coastline has to offer.

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.
JanFebMarAprMayJunJulAugSepOctNovDec224h270h316h312h328h271h316h314h291h275h282h288h
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

In the picturesque locale of San Diego, Mexico, July offers a moderate 42% chance of sunny weather, nestled among fluctuating sunshine probabilities throughout the year. Interestingly, this month follows an upward trend from June's notably lower 30%, suggesting a gradual return to sunnier skies as summer progresses. While it does not reach the heights of earlier months like March (66%) or the sun-soaked days of November (58%), July stands out as a transition month. Visitors can expect a pleasant balance of sun and shade, with the warmth of summer gradually enveloping the region, inviting all to enjoy its vibrant outdoor charm.

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.
JanFebMarAprMayJunJulAugSepOctNovDec41%62%66%57%41%30%42%50%32%47%58%63%
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.
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.

July Winds in San Diego

In July, the winds in San Diego, Mexico, bring a gentle breeze with an average speed of 2.5 m/s (or 6 mph), reflecting a slight decrease from the slightly higher winds of the previous months. This mid-summer period typically offers a pleasant atmosphere as temperatures rise, while the wind remains moderate, reminiscent of the lighter breezes felt in August and September. Interestingly, as the summer progresses into the latter half of the year, an overall decline in wind speed is noted, particularly as autumn approaches. Despite this trend, July stands out as a time when locals and visitors alike can enjoy the warm California sun accompanied by a soothing gentle wind, perfect for beach outings and outdoor activities.

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.
JanFebMarAprMayJunJulAugSepOctNovDec2.42.83.13.13.12.82.5 m/s2.42.31.72.02.5
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.

In contrasting July and January weather, July typically invites warmth with a minimum temperature of 22°C (72°F) and an average high of 38°C (100°F), accompanied by fairly consistent humidity at 65%. With 68 mm (2.7 in) of precipitation spread over 14 days, July can deliver sporadic rain showers amidst its heat. In contrast, January brings cooler temperatures, with a minimum of 11°C (52°F) and an average of 23°C (75°F), making it more comfortable for those who prefer milder conditions. This month also sees significantly less precipitation, amounting to just 30 mm (1.2 in) over 4 days and a higher humidity level of 85%. For more specifics on January weather patterns, 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 22°C (72°F) and an average of 28°C (83°F), peaking at a scorching 38°C (100°F). In contrast, February enjoys milder conditions, featuring a minimum of 10°C (50°F) and an average of 25°C (78°F), reaching up to 36°C (97°F). While July sees more precipitation at 68 mm (2.7 in) over 14 days, February remains relatively dry with only 10 mm (0.4 in) across just 3 days. Additionally, humidity levels in February are higher at 80%, compared to July’s 65%. For more detailed insights into February weather in San Diego, visit San Diego weather in February.

In comparison to July, March experiences significantly milder temperatures, with an average of 27°C (80°F) compared to July’s warmer average of 28°C (83°F). The minimum temperature in March is also more comfortable at 14°C (58°F), whereas July starts at a higher minimum of 22°C (72°F). On the other hand, July is characterized by heavier precipitation, averaging 68 mm (2.7 in) over 14 days, while March enjoys a much drier climate with only 8 mm (0.3 in) of rainfall over just 1 day. Humidity levels are similar, with March at 69% and July at 65%. For more details about the weather patterns in March, you can visit San Diego weather in March.

In comparing the weather of July and April, we see notable differences in temperature and precipitation patterns. July features a minimum temperature of 22°C (72°F) and an average high of 28°C (83°F), with peaks reaching up to 38°C (100°F). It also experiences more rainfall, totaling 68 mm (2.7 in) over 14 days, resulting in higher humidity at 65%. In contrast, April has a lower minimum temperature of 16°C (61°F) and a similar average high of 28°C (84°F), but it can reach a maximum of 40°C (104°F). Additionally, April is much drier, with only 26 mm (1.0 in) of precipitation over just 5 days and a humidity level slightly lower at 64%. For more detailed insights, you can visit San Diego weather in April.

In comparing the weather of July and May, July tends to be warmer with an average temperature of 28°C (83°F) compared to May's average of 29°C (85°F), while May registers a slightly higher maximum temperature of 39°C (102°F). Precipitation levels are also notable; July experiences 68 mm (2.7 in) of rain over 14 days, whereas May has less, with 54 mm (2.1 in) over 9 days. Humidity levels remain fairly similar, with July at 65% and May slightly lower at 63%. For more detailed insights, you can check San Diego weather in May.

In comparing the weather between June and July, both months share similar temperature ranges, with minimum temperatures around 22°C (72°F) and average highs reaching up to 38°C (100°F in July and 101°F in June). However, June experiences significantly more rainfall, totaling 192 mm (7.5 in) over 17 days, compared to July's 68 mm (2.7 in) across 14 rainy days. Additionally, while humidity is slightly higher in July at 65%, June maintains a comfortable level at 62%. For more detailed information, you can check San Diego weather in June.

In comparing the weather of July and August, we see some notable differences. While both months share a similar average temperature of 28°C (83°F), July experiences slightly higher maximum temperatures reaching up to 38°C (100°F), compared to August’s maximum of 37°C (99°F). However, August tends to be wetter, with precipitation recorded at 103 mm (4.1 in) over 18 days, whereas July sees only 68 mm (2.7 in) across 14 days. Additionally, humidity levels rise in August to 78%, compared to July's 65%, making the latter part of summer feel more muggy. For more details on weather specifics, you can refer to San Diego weather in August.

In comparing the weather between July and September, we see some notable differences. July experiences slightly higher maximum temperatures, reaching up to 38°C (100°F), while September's highs peak at 37°C (98°F). Both months share the same minimum temperature of around 22°C (72°F), and average daily temperatures are quite similar, hovering around 28°C (82°F). However, September is significantly wetter, with 128 mm (5.0 in) of precipitation over 21 days, compared to July's 68 mm (2.7 in) over just 14 days. The humidity also rises in September to 85%, making it feel more muggy than July's 65%. For more details on September weather, you can check San Diego weather in September.

In comparing the weather between July and October, a distinct shift is evident. July boasts warmer temperatures, with averages around 28°C (83°F) and occasional peaks of up to 38°C (100°F), while October experiences slightly cooler conditions with average temperatures of 27°C (80°F) and a maximum of 36°C (97°F). However, October sees a significant increase in precipitation, receiving 129 mm (5.1 in) over 21 days, compared to July's 68 mm (2.7 in) spread over 14 days. Additionally, October's humidity rises to 87%, making it feel more humid than the 65% average in July. For more detailed information, you can check San Diego weather in October.

July and November exhibit contrasting weather patterns. July boasts higher temperatures, with an average of 28°C (83°F) and peaks reaching up to 38°C (100°F). This month also experiences considerable humidity at 65% and a total precipitation of 68 mm (2.7 in) over 14 days. In contrast, November offers milder temperatures, averaging 25°C (77°F) with a maximum of 34°C (93°F) and a notable decrease in minimum temperatures to 13°C (55°F). The month sees slightly less precipitation at 53 mm (2.1 in) over 11 days but has a higher humidity level at 88%. For more detailed insights, you can explore San Diego weather in November.

In July, the weather is characterized by warm temperatures, with a minimum of 22°C (72°F) and an average of 28°C (83°F), peaking at a scorching 38°C (100°F). With 68 mm (2.7 in) of precipitation spread over 14 days, July experiences higher humidity at 65%, making it feel quite muggy.

Conversely, December offers a more moderate climate, with minimum temperatures dropping to 10°C (51°F) and an average of 24°C (75°F), while the maximum reaches a pleasant 34°C (93°F). The month sees significantly less rainfall, with only 25 mm (1.0 in) over 5 days, although humidity rises to a higher 88%. For more detailed insights, you can 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

As July unfolds in San Diego, it showcases a distinctively warm and inviting climate, setting it apart from other months of the year. With temperatures soaring to a pleasant average of 28°C (83°F), residents and visitors alike revel in the summer sun, while still enjoying cooler evenings. However, July also brings a touch of summer humidity, hovering around 65%, which adds a layer of warmth to the air. Although there may be some sporadic rainfall, totaling around 68 mm (2.7 in) over about 14 days, it generally serves to refresh the lush landscapes rather than disrupt outdoor plans. This unique blend of heat and occasional rain makes July an ideal time to explore the vibrant coastline and attractions of this beautiful city. To learn more about San Diego's year-round climate patterns, visit San Diego Climate.