Last updated: April 22, 2025
May in San Diego, Mexico, ushers in warm days characterized by maximum temperatures reaching up to 39°C (102°F) and an average temperature of 29°C (85°F). While the warmth is inviting, residents and visitors can expect occasional showers, with a total precipitation of 54 mm (2.1 in) spread over 9 days. The humidity level, averaging at 63%, adds a touch of tropical feel to the coastal climate, making it essential to stay hydrated and plan outdoor activities accordingly. As spring transitions toward summer, May is a vibrant month that beautifully blends sunshine with refreshing rain, setting the stage for unforgettable experiences in this picturesque destination.
In May, San Diego, Mexico, experiences a delightful transition into warmer days, with temperatures showcasing a pleasing range. The minimum temperature begins to rise, reaching a comfortable 18°C (65°F), while the average creeps up to a pleasant 29°C (85°F)—perfect for outdoor activities. Highs can peak at an impressive 39°C (102°F), hinting at the approaching summer. This month marks a noticeable shift from the cooler April breezes, with vibrant, sunny days becoming more prevalent. As the seasons change, visitors and locals alike can enjoy the mix of warm weather and balmy nights, making May an ideal time for exploration and relaxation by the coast.
In May, San Diego, Mexico, experiences a noticeable uptick in precipitation, recording 54 mm (2.1 in) over 9 days. This marks a significant increase from the preceding months, including April's 26 mm, suggesting the onset of the rainy season. The rise in rainfall is also indicative of the transition to a wetter climate as summer approaches, with June seeing a dramatic surge to 192 mm (7.5 in). This pattern of gradual escalation in both the amount and frequency of rain paints a picture of a region that shifts from mild spring showers to more substantial precipitation, ultimately transforming the landscape into a lush and vibrant display of nature in the months to come.
In San Diego, Mexico, the humidity levels exhibit a clear trend as the months progress. After starting the year with a very high humidity of 85% in January, there’s a steady decline until April, when the humidity reaches a comfortable 64%. May continues this trend with a slight further dip to 63%, signaling the region's transition to drier conditions as summer approaches. However, as the peak of summer arrives in August, the humidity climbs again, soaring to 78%, only to peak once more in the fall with 85% in September. This cyclical pattern highlights the subtle balance between the cooler, more humid months at the beginning and end of the year, contrasted with the warmer, yet occasionally humid summers.
As we transition into May, San Diego, Mexico, experiences a consistently intense UV Index of 13, categorizing it within the extreme exposure range, with a burn time of just 10 minutes. This trend of high UV levels, peaking in the spring and extending into the summer months, underscores the importance of sun safety. May stands out as a continuation of this pattern, similar to April and March, where sun seekers need to remain vigilant against harmful UV rays. As we move into the sunnier months ahead, knowing these trends can help you plan your outdoor activities wisely. For a detailed breakdown of UV levels throughout the year, be sure to check out San Diego UV Index.
UV Risk Categories
As the calendar turns to May, San Diego basks in an impressive 328 hours of sunshine, marking it as the sunniest month of the year. This surge in sunlight follows a steady rise from January's 224 hours, showcasing the region's transition from the cooler winter months into the vibrant warmth of springtime. Notably, March and April also contribute to this trend, with 316 and 312 hours respectively, setting the stage for May's bright days. While June experiences a dip to 271 hours, the overall trend remains clear: San Diego's sun-drenched allure shines its brightest at the heart of spring, promising delightful days for outdoor enthusiasts and sun seekers alike.
In San Diego, Mexico, the month of May typically sees a 41% chance of sunny weather, which aligns with a noticeable dip from the more promising March (66%) and April (57%). This trend reflects a pattern where the early part of the year enjoys a higher likelihood of sunny days, peaking in March, before tapering off as the summer months approach. As we transition into June, the chances fall further to 30%, indicating that while May still holds some potential for sunshine, it signals the beginning of a tendency toward cloudier conditions. Thus, for those planning visits or outdoor activities in San Diego during this time, it’s wise to be prepared for a mix of sun and clouds as the month unfolds.
In May, San Diego, Mexico, basks in the glory of 13 hours of daylight, marking a delightful transition into the heart of spring. As the year unfolds, daylight duration experiences a steady climb, moving from 11 hours in January and February to a significant increase in March and April. This seasonal progression not only highlights the region’s vibrant spring days but also sets the stage for summer, where daylight remains consistently at 13 hours through June and July. However, as August rolls in, the hours begin to taper off, hinting at the impending return to the shorter days of fall. This rhythm of daylight not only enhances outdoor activities but also enriches the cultural vibrancy of the area, making early summer a particularly enjoyable time to soak up the sun.
As May unfolds in San Diego, Mexico, the coastal winds consistently reach an enjoyable average speed of 3.1 m/s (7 mph), mirroring the breezy conditions of April. This steady wind pattern provides a refreshing backdrop for outdoor activities, making it an ideal time for beachgoers and adventure seekers alike. Interestingly, after May, the winds slightly taper off, with June and July seeing a decrease to 2.8 m/s (6 mph) and 2.5 m/s (6 mph), respectively. The trend indicates that while early summer promises pleasant breezes, the more tranquil winds of late summer may invite leisurely strolls on the shore rather than vigorous water sports. Thus, May stands out as a peak moment for those looking to embrace the invigorating essence of San Diego's coastal ambiance.
The weather in San Diego changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May'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 comparing the weather between May and January, May tends to be significantly warmer with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 39°C (102°F), while January offers cooler temperatures with a range from 11°C (52°F) to 38°C (101°F). The humidity is notably lower in May at 63%, compared to a higher 85% in January, which can make January feel more muggy despite the lower temperatures. Additionally, May experiences more precipitation, averaging 54 mm (2.1 in) over about nine days, whereas January sees only 30 mm (1.2 in) over approximately four days. For more detailed insights, check out San Diego weather in January.
When comparing the weather in May and February, it's clear that May is significantly warmer, with average temperatures reaching 29°C (85°F) and highs peaking at 39°C (102°F). In contrast, February experiences milder conditions, with an average of 25°C (78°F) and maximum temperatures of 36°C (97°F). Additionally, February tends to be much drier, receiving only 10 mm (0.4 in) of precipitation over approximately 3 days, compared to May's 54 mm (2.1 in) spread over 9 days. Humidity is also higher in February at 80%, while May averages around 63%. For a more detailed overview, you can check out San Diego weather in February.
In comparing the weather of March and May, it's evident that May is significantly warmer, with average temperatures soaring to 29°C (85°F) compared to March’s 27°C (80°F). The maximum temperatures in May can reach up to 39°C (102°F), while March sees a peak of 37°C (98°F). Additionally, May experiences more precipitation, totaling 54 mm (2.1 in) over 9 days, compared to the scant 8 mm (0.3 in) over just 1 day in March. However, March has a slightly higher humidity level at 69%, compared to May's 63%. For more detailed insights on March weather, you can check San Diego weather in March.
In comparing the weather between April and May, May tends to be slightly warmer, with an average temperature of 29°C (85°F) compared to April's 28°C (84°F). However, April has a slightly higher maximum temperature of 40°C (104°F) compared to May's peak of 39°C (102°F). Regarding precipitation, May experiences more rain, totaling 54 mm (2.1 in) over 9 days, while April sees only 26 mm (1.0 in) over 5 days. Humidity levels are quite similar, with May at 63% and April at 64%. For more detailed insights, you can check San Diego weather in April.
In May, the weather showcases warmer temperatures, with an average high of 29°C (85°F) and a maximum reaching up to 39°C (102°F), while experiencing relatively low precipitation of 54 mm (2.1 in) over 9 days. The humidity stands at 63%, contributing to a warm feel. In contrast, June sees slightly cooler average temperatures at 28°C (83°F) and a high of 38°C (101°F), but it is notably wetter, with precipitation increasing to 192 mm (7.5 in) over 17 days. Despite the rise in rainfall, humidity remains similar at 62%. For more detailed insights, check out San Diego weather in June.
May and July present contrasting weather patterns, with May featuring warmer average temperatures but July experiencing higher humidity levels. In May, temperatures range from a minimum of 18°C (65°F) to a maximum of 39°C (102°F), with an average of 29°C (85°F). Conversely, July's temperatures are slightly cooler, with a minimum of 22°C (72°F) and a maximum of 38°C (100°F), resulting in a lower average of 28°C (83°F). Rainfall also increases in July, totaling 68 mm (2.7 in) over 14 days compared to May’s 54 mm (2.1 in) over 9 days. Humidity remains relatively high in both months, at 63% in May and slightly higher at 65% in July. For more detailed information, you can visit San Diego weather in July.
May and August offer distinct weather experiences, highlighting the transition from late spring to peak summer. In May, temperatures range from a comfortable 18°C (65°F) at night to a warm average of 29°C (85°F) during the day, with a maximum of 39°C (102°F). The month sees relatively low precipitation of 54 mm (2.1 in), occurring over about 9 days, and a moderate humidity level of 63%. In contrast, August presents a slightly warmer environment, with nighttime lows of 21°C (71°F) and an average temperature of 28°C (83°F). However, it also experiences a higher maximum temperature of 37°C (99°F) and significantly greater rainfall, totaling 103 mm (4.1 in) over 18 days, along with increased humidity at 78%. For a closer look at what to expect, check out San Diego weather in August.
In May, temperatures range from a pleasant 18°C (65°F) to a scorching 39°C (102°F), with an average of 29°C (85°F). The month sees relatively low precipitation of 54 mm (2.1 in) over about 9 days, resulting in a moderate humidity level of 63%. In contrast, September experiences a warmer minimum temperature of 22°C (71°F) and a slightly lower average of 28°C (82°F), peaking at 37°C (98°F). However, it comes with significantly higher rainfall totaling 128 mm (5.0 in) over 21 days and increased humidity at 85%. For more details on September weather patterns, you can check San Diego weather in September.
In May, temperatures in San Diego typically range from a minimum of 18°C (65°F) to a maximum of 39°C (102°F), with an average temperature of around 29°C (85°F). The month sees about 54 mm (2.1 in) of precipitation over 9 days, and humidity levels are relatively moderate at 63%. In contrast, October offers slightly cooler temperatures with minimums of 16°C (62°F), averages of 27°C (80°F), and maximums reaching up to 36°C (97°F). However, October experiences significantly higher rainfall, with 129 mm (5.1 in) spread across 21 days, accompanied by increased humidity at 87%. For a more detailed look at October's weather, visit San Diego weather in October.
May and November present two distinct weather patterns. In May, temperatures range from a minimum of 18°C (65°F) to a sweltering maximum of 39°C (102°F), with an average temperature of 29°C (85°F). This month typically sees about 54 mm (2.1 in) of precipitation over 9 days and a humidity level of 63%. In contrast, November has cooler temperatures, with a minimum of 13°C (55°F), an average of 25°C (77°F), and a maximum of 34°C (93°F). Precipitation remains similar at 53 mm (2.1 in) but occurs over 11 days, coupled with higher humidity at 88%. For more details on November weather, you can visit San Diego weather in November.
May and December exhibit significantly different weather patterns. In May, temperatures soar with a minimum of 18°C (65°F) and an average high of 39°C (102°F), while humidity levels sit at 63%. The month experiences 54 mm (2.1 in) of precipitation over about 9 days, contributing to a warm and occasionally humid atmosphere. In contrast, December presents a much milder climate, with temperatures ranging from a minimum of 10°C (51°F) to an average of 24°C (75°F) and a maximum of 34°C (93°F). It also has lower precipitation levels at 25 mm (1.0 in) across just 5 days, although humidity rises to 88%, resulting in a more damp and cooler environment. For detailed insights on December weather, you can check San Diego weather in December.
As spring gives way to summer, May weather in San Diego offers a delightful contrast to earlier months, boasting warmer temperatures and an increase in humidity. With average highs reaching a comfortable 29°C (85°F), outdoor enthusiasts can enjoy sunny days that are perfect for beach outings and outdoor activities. Though occasional showers may occur, with about 54 mm (2.1 in) of precipitation over nine days, these are usually brief and do little to dampen the vibrant atmosphere. Embrace the mild evenings that linger around 18°C (65°F), providing a refreshing end to the day. For a more comprehensive look at what to expect throughout the year, visit San Diego Climate.