Last updated: February 24, 2025
In May, San Diego experiences a delightful spring climate with a maximum temperature soaring to 25°C (78°F), while average temperatures hover around a comfortable 17°C (62°F). Nights cool down pleasantly, with a minimum temperature of 12°C (54°F). The month sees light precipitation, totaling just 16 mm (0.6 in) across approximately 4 days, which is ideal for enjoying the outdoors. With a moderate humidity level of 46%, May offers a refreshing balance for both residents and visitors to relish the sunny beach vibes and vibrant city atmosphere.
In May, San Diego offers a delightful prelude to summer, with temperatures ranging from a mild minimum of 12°C (54°F) to a comfortable maximum of 25°C (78°F). As the month progresses, the average temperature settles around 17°C (62°F), creating a pleasant atmosphere perfect for outdoor activities. This upward trend from the previous months signifies a shift away from the cooler spring temperatures, with May being notably warmer than February and March, while still maintaining a refreshing coastal breeze. The days grow longer and sunnier, making it an ideal time for beach outings and exploring the vibrant city. This month marks the transition into the warmer months, hinting at the warm summer days that lie ahead.
In May, San Diego experiences a notable decline in precipitation, with only 16 mm (0.6 in) of rain recorded over four days. This shift follows the wetter months of January through April, which boast more substantial rainfall, peaking in February with 55 mm (2.2 in). As spring gives way to the dry summer months, May marks a clear transition, indicating that residents can soon look forward to sun-drenched days ahead. The downward trend in precipitation from April's 20 mm (0.8 in) reflects the region's characteristic dry climate, setting the stage for the arid summer where rain becomes a rare occurrence.
May marks a delightful transition in San Diego's climate, as humidity levels dip to a refreshing 46%, the lowest point of the year. Following the wetter winter months, where humidity peaked at 77% in February, May signals the start of a drier season. As spring blossoms, the noticeable decline in humidity from its early-year highs to this more comfortable level not only enhances the city's outdoor charm but also sets the stage for the sun-soaked summer months ahead. This trend of decreasing humidity continues into June and July, sustaining a pleasant atmosphere for beachgoers and outdoor enthusiasts alike. Overall, May serves as a turning point, welcoming in a season of mild, enjoyable weather in America’s Finest City.
As May arrives in San Diego, the UV Index surges to an extreme level of 11, highlighting a significant upward trend compared to earlier months. With a quick burn time of just 10 minutes, the urgency for sun protection becomes paramount. This drastic increase from 4 in January and even 10 in April indicates a shift toward more intense sun exposure as spring transitions into summer. The month pairs well with beach outings but comes with a caveat: ensure proper sunscreen application and protective gear to enjoy the sun safely. For more detailed insights, visit San Diego UV Index.
UV Risk Categories
As spring transitions into summer, May shines brightly in San Diego, boasting an impressive 361 hours of sunshine. This delightful month marks a noticeable peak in daylight hours, following a progressive increase from 195 hours in January to 325 hours in April. The trend continues into June, reaching the annual zenith of 366 hours, showcasing San Diego's reputation as a sun-drenched haven. This gradual buildup of sunshine not only signifies rising temperatures but also beckons outdoor enthusiasts to revel in the city's stunning beaches and attractions, making May a perfect moment to embrace the vibrant outdoor lifestyle that San Diego is known for.
In San Diego, the likelihood of sunny weather in May dips to 42%, marking a notable decline compared to the earlier months of the year where sunshine probabilities hover around 63% in January, March, and beyond. Following the peak sunshine period from January through March, the chance for clear skies falls sharply to 50% in April, and continues to slip into May. This trend suggests that while May can still offer pleasant days, the sunny conditions become less assured as the city transitions into the summer season. As we move towards June with a 47% likelihood of sun, it's clear that San Diego's weather begins to show more variation, reminding us to keep an eye on the clouds as spring gives way to summer.
In San Diego, May marks a wonderful transition in daylight duration, with the sun gracing the sky for a solid 13 hours. This consistent daylight mirrors the increasing brightness seen since February and April, indicating a steady arrival of spring's warmth. As the month rolls in, residents can enjoy the same generous hours of sunlight that continue into June and July, making this period ideal for outdoor activities and basking in the sun's glow. Comparatively, as the year progresses, daylight begins its gradual decline, reminding us to cherish these longer days before they shorten again in the fall. Thus, May stands out as a vital link in San Diego's annual rhythm of light, setting the stage for the sunniest season ahead.
In May, San Diego enjoys a delightful average wind speed of 3.1 m/s (7 mph), contributing to the city's mild and pleasant coastal atmosphere. This figure marks a slight dip from the breezier months of March and April but remains consistent with the typical summer conditions ahead, where wind speeds stabilize around 3.1 m/s. Interestingly, as summer approaches, the winds continue to hover around this mark, neither rising nor falling significantly, creating an enchanting backdrop for outdoor activities. Overall, while May may be a transitional month, it retains a refreshing breeze that complements San Diego's idyllic seaside 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 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.
When comparing the weather in May and January, it is evident that May tends to be warmer and drier. In May, temperatures range from a minimum of 12°C (54°F) to a maximum of 25°C (78°F), with an average temperature of 17°C (62°F). Precipitation is limited to just 16 mm (0.6 in) over 4 days, resulting in a humidity level of 46%. In contrast, January features cooler temperatures, with a minimum of 8°C (47°F) and an average of 14°C (58°F), also peaking at 25°C (77°F). However, it experiences more substantial rainfall at 45 mm (1.8 in) over 5 days, accompanied by higher humidity at 72%. For a detailed look at January weather conditions, visit San Diego weather in January.
When comparing the weather in May and February, there are notable differences in temperature and precipitation levels. May typically enjoys milder temperatures, with averages around 17°C (62°F) and maximums reaching up to 25°C (78°F), while February experiences cooler temperatures, averaging 14°C (57°F) and peaking at 26°C (79°F). Precipitation also varies significantly; February sees more rainfall at 55 mm (2.2 in) over six days, compared to May's lighter precipitation of 16 mm (0.6 in) over just four days. Additionally, February has a higher humidity level at 77%, compared to May's 46%, contributing to a more damp feeling in the air. For more detailed information on February weather, you can visit San Diego weather in February.
May typically offers a warmer and drier climate compared to March. With average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 25°C (78°F), May enjoys pleasant weather with only 16 mm (0.6 in) of precipitation over about 4 days. In contrast, March presents cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 26°C (80°F), but it also has significantly more rain, accumulating 38 mm (1.5 in) over roughly 8 days. Additionally, March experiences higher humidity levels at 67%, while May maintains a more comfortable 46% humidity. For more details on March’s weather specifics, you can check San Diego weather in March.
In comparing the weather between April and May, April tends to be slightly warmer with a higher maximum temperature of 29°C (84°F) compared to May's maximum of 25°C (78°F). However, May offers more stable temperatures with a smaller range, featuring a minimum of 12°C (54°F) against April's 11°C (53°F). Both months experience relatively low precipitation, but April sees a bit more rain overall at 20 mm (0.8 in) over just 2 days, while May records only 16 mm (0.6 in) over 4 days. Additionally, April has higher humidity at 56%, making it feel slightly more humid than May's 46%. For a detailed view, check out San Diego weather in April.
May typically experiences a milder climate with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 25°C (78°F), accompanied by around 16 mm (0.6 in) of precipitation over four days. The humidity level averages around 46%. In contrast, June sees a slight increase in temperatures, with minimums of 14°C (58°F) and maximums reaching up to 29°C (84°F). June is notably drier, with only 2 mm (0.1 in) of precipitation and no rainy days, while humidity rises slightly to 48%. For more details on the weather in June, you can check this link: San Diego weather in June.
May and July showcase distinct weather patterns, with May experiencing cooler temperatures and more frequent precipitation than July. In May, the temperature ranges from a minimum of 12°C (54°F) to a maximum of 25°C (78°F) with an average of 17°C (62°F) and around 16 mm (0.6 in) of rain over 4 days. In contrast, July enjoys warmer temperatures, with a minimum of 16°C (62°F), an average of 21°C (69°F), and a peak of 29°C (85°F), while precipitation is minimal at just 1 mm (0.1 in) across 0 days. Both months maintain a comfortable humidity level of 46%. For those looking to explore the summer weather, check out San Diego weather in July.
May and August present distinct weather patterns. In May, temperatures range from a mild minimum of 12°C (54°F) to a comfortable maximum of 25°C (78°F), with an average of 17°C (62°F). This month sees some precipitation, with 16 mm (0.6 in) over four days, and humidity levels sitting at 46%. In contrast, August is warmer, with minimum temperatures starting at 17°C (63°F) and peaking at a maximum of 29°C (84°F), averaging 21°C (71°F). Notably, August experiences significantly less rainfall, receiving just 1 mm (0.0 in) and no rainy days, paired with slightly lower humidity at 42%. For more detailed insights on August's weather, visit San Diego weather in August.
May and September offer contrasting weather patterns. In May, temperatures range from a minimum of 12°C (54°F) to a maximum of 25°C (78°F), with an average temperature of 17°C (62°F). While rain is relatively light with only 16 mm (0.6 in) of precipitation over 4 days, the humidity is a comfortable 46%. In contrast, September experiences warmer temperatures, with a minimum of 17°C (62°F) and a maximum of 31°C (88°F), averaging 21°C (70°F). Notably, September boasts much drier conditions, with only 3 mm (0.1 in) of precipitation over 0 days and slightly higher humidity at 52%. For a closer look at the weather during this month, check out San Diego weather in September.
In May, the weather typically features mild temperatures, with a minimum of 12°C (54°F) and a maximum of 25°C (78°F), culminating in an average of 17°C (62°F). The month sees about 16 mm (0.6 in) of precipitation over approximately 4 days, maintaining a humidity level of 46%. In contrast, October experiences slightly warmer conditions, with minimum temperatures at 13°C (55°F) and highs reaching up to 32°C (90°F), averaging around 20°C (68°F). Rainfall decreases to just 13 mm (0.5 in) over 2 days, and humidity rises to 58%. To learn more about October weather in San Diego, you can visit San Diego weather in October.
May and November in San Diego present mild, comfortable temperatures but with subtle differences in weather patterns. In May, temperatures range from a minimum of 12°C (54°F) to a maximum of 25°C (78°F) with an average of 17°C (62°F), accompanied by relatively low precipitation of 16 mm (0.6 in) over 4 days and 46% humidity. In contrast, November features a slightly cooler minimum temperature of 10°C (51°F) and a higher maximum of 27°C (81°F), maintaining an average similar to May at 17°C (63°F). However, November experiences increased rainfall of 24 mm (0.9 in) over just 2 days and a higher humidity level of 66%. These shifts illustrate how early spring tends to be drier while late fall can be more humid—key factors to consider if you're planning a visit. For more detailed information, check out San Diego weather in November.
In May, the weather in San Diego is generally warm and pleasant, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 25°C (78°F). It experiences relatively low precipitation, with only 16 mm (0.6 in) falling over about 4 days and a humidity level of 46%. In contrast, December brings cooler temperatures, with averages between 8°C (47°F) and 24°C (76°F). The month is also wetter, receiving 60 mm (2.4 in) of rain across 5 days, and the humidity rises significantly to 74%. For more details, check out San Diego weather in December.
As May rolls into San Diego, the weather begins to brighten, showcasing a delightful shift compared to the cooler months. With pleasant temperatures averaging around 17°C (62°F), the city basks in a mild warmth, perfect for outdoor activities. This month is also characterized by relatively low rainfall, with only a few days of precipitation, making it a great time to soak up the sun. The humidity hovers around 46%, providing a comfortable atmosphere that enhances the enjoyment of the stunning coastal scenery. For more insights into San Diego's year-round weather patterns, be sure to explore San Diego Climate.