April Weather in San Diego, United States

Last updated: February 24, 2025

In April, San Diego experiences a delightful California spring with maximum temperatures reaching a warm 29°C (84°F) and an average of 16°C (61°F). The month typically sees a minimum temperature of 11°C (53°F), providing a pleasant climate for both residents and visitors. While there is a slight chance of rain, with precipitation totaling 20 mm (0.8 in) over just 2 days, the humidity remains manageable at 56%, ensuring that outdoor activities can be enjoyed comfortably under the sun.

April Temperature in San Diego

In April, San Diego starts to embrace the warmth of spring, showcasing a delightful temperature range that encourages outdoor activities. With a minimum of 11°C (53°F) and a pleasant average of 16°C (61°F), the days transition to a comfortable max of 29°C (84°F), making it one of the warmer months so far. This trend highlights an upward movement in temperatures from the cooler days of winter, evident as March's max reached only 26°C (80°F). As the month progresses, the increasing warmth sets the stage for the approaching summer, inviting locals and visitors alike to bask in the sun-soaked days that define this coastal city.

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

The chart illustrates April 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.
JanFebMarAprMayJunJulAugSepOctNovDec575758616265697170686358
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.

April Precipitation in San Diego

In April, San Diego experiences a noticeable dip in precipitation, receiving only 20 mm (0.8 in) of rain over just two days. This decline continues the trend from March, which had 38 mm (1.5 in) over eight days. As the region transitions fully into spring, the dry season begins to set in, with May expected to bring even less rain at 16 mm (0.6 in). This sharp decrease in both amount and frequency of precipitation underscores the region's characteristic dry spells, paving the way for a sunny, warm summer ahead.

April Precipitation Trends in San Diego

The chart displays monthly precipitation patterns in San Diego, with values for each month alongside April's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec45553820162114132460
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Diego

April in San Diego marks a significant transition in humidity as the city moves into milder late spring. With an average humidity of 56%, April is notably drier than the preceding months of winter and early spring, where humidity levels remained higher, peaking at 77% in February. This decline continues into May, where humidity drops further to 46%, highlighting a refreshing trend toward cooler, more comfortable conditions. As the months progress towards summer, San Diego typically experiences its driest spells, making April a delightful time for outdoor activities, with the pleasant balance of warmth and deteriorating humidity setting the stage for summer ahead.

April Average Humidity in San Diego

This chart illustrates the average monthly humidity levels in San Diego, with April's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how April's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec72%77%67%56%46%48%46%42%52%58%66%74%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Diego

As April settles in San Diego, residents and visitors alike should keenly note the rising UV Index, which reaches a striking 10 this month—a threshold classified as very high. This increase from March's already significant index of 8 highlights a noticeable trend as spring progresses, indicating that sun exposure risks are increasing. With a burn time of just 15 minutes, it's crucial to take protective measures like sunscreen and shade seriously during this time. The UV Index will only escalate further in May with an extreme rating, underscoring the importance of staying informed and vigilant. For more insights on protecting yourself from harmful UV rays, explore the San Diego UV Index.

Maximum UV Index Levels in San Diego for April

The chart shows the monthly maximum UV Index (UVI) for San Diego in April, 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.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111010754
Data source: San Diego April 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.

April Sunshine in San Diego

April in San Diego brings a delightful surge of sunshine, with 325 hours illuminating the city, marking a notable increase from the previous months. Following a gradual ascent from 195 hours in January to 299 hours in March, April's sunlight is a clear indicator of spring's embrace. As the month progresses, the days grow longer, paving the way for an even sunnier May, which boasts 361 hours. This upward trend in sunshine not only enhances the vibrant atmosphere of San Diego but also invites locals and visitors alike to bask in its radiant beauty. With summer just around the corner, the allure of San Diego's warm, sun-drenched days continues to rise, promising even more moments of sun-soaked bliss.

Monthly Sunshine Duration in San Diego: April Highlighted

The April sunshine duration represents the total number of hours San Diego experiences direct sunlight during the month of April, excluding cloudy or obstructed periods. This chart compares the sunshine duration of April with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec195h243h299h325h361h366h376h361h318h297h257h231h
Data source: San Diego April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Diego During April

April in San Diego brings a notable shift in the weather pattern, with a 50% chance of sunny days that marks a decrease compared to the preceding months, January, February, and March, each boasting around 63%. This trend hints at the beginning of a transitional period, as the warmer months approach and May’s likelihood dips further to 42%. Interestingly, while April isn't the sunniest month, it serves as a bridge to sunnier conditions later in the year, with sunshine probabilities picking back up in the summer months like July, where the chance increases to 56%. As San Diegans step into April, they might expect a mix of sunny and cloudy days, encapsulating the city's vibrant springtime charm.

Percentage of Sunny Days in April in San Diego

The chart illustrates the percentage of sunny days in San Diego throughout the year, with April 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.
JanFebMarAprMayJunJulAugSepOctNovDec63%62%63%50%42%47%56%60%63%64%63%47%
Data source: San Diego April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Diego in April

As the calendar turns to April in San Diego, daylight begins to stretch its arms, extending to an impressive 13 hours. This marks a significant leap from the 10 hours in January, signaling the arrival of spring and the vibrant outdoor activities that come with it. Following March's 12 hours, April embraces longer evenings, inviting residents and visitors alike to enjoy the beautiful coastal sunsets. The daylight hours remain consistent through May, but the gradual incline continues into June, where the enjoyment of nearly 14 hours of sunlight graces the city. This upward trend in daylight duration throughout the first half of the year is a testament to San Diego’s enticing climate, encouraging people to soak up every moment of sunshine before the days start to shorten again later in the year.

Average Daylight Hours in San Diego for April

The chart illustrates the variation in daylight duration in San Diego throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 15m11h 1m12h13h13h 50m14h 15m14h 1m13h 16m12h 19m11h 19m10h 27m10h 1m
Data source: San Diego daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in San Diego

In April, the winds in San Diego settle into a gentle rhythm, with an average speed of 3.2 m/s (7 mph). This slight dip from March's breezy 3.4 m/s reflects a transition into spring, where the city's verdant landscapes bloom and outdoor activities abound. Interestingly, April's winds are a herald of the consistent breeziness that characterizes the subsequent months, as May and June maintain a similar pace. Throughout the year, the wind speeds show a tendency to fluctuate subtly, yet April serves as a stable benchmark, setting the stage for the summer's mild to moderate gales. As the temperatures rise, these pleasant winds become a refreshing companion, enhancing the charm of San Diego's springtime allure.

Average April Wind Speed in San Diego

The chart displays monthly wind speed patterns in San Diego, with values for each month shown alongside April's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how April's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.02.73.43.2 m/s3.13.33.13.13.12.82.43.2
Data source: San Diego April wind data, generated using information from the Copernicus Climate Change Service.

How April 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 April'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.

April weather in San Diego tends to be warmer and more pleasant compared to January. With average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), April showcases a mild climate with less precipitation, averaging only 20 mm (0.8 in) over about 2 days. In contrast, January experiences cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 25°C (77°F), along with significantly higher precipitation levels of 45 mm (1.8 in) spread across 5 days and increased humidity at 72%. For more detailed information on January weather in San Diego, you can visit San Diego weather in January.

When comparing the weather in April to that of February, it's clear that April tends to be warmer and drier. April features a minimum temperature of 11°C (53°F), an average of 16°C (61°F), and a maximum of 29°C (84°F), with only 20 mm (0.8 in) of precipitation over just 2 days. In contrast, February sees cooler temperatures, with a minimum of 7°C (45°F), an average of 14°C (57°F), and a maximum of 26°C (79°F), but it experiences more rainfall at 55 mm (2.2 in) over 6 days. Additionally, February has higher humidity at 77%, compared to April's 56%. For more details, you can explore San Diego weather in February.

April generally features milder weather compared to March in terms of temperature and precipitation. The minimum temperature in April is slightly higher at 11°C (53°F) compared to 8°C (47°F) in March, with average temperatures reaching 16°C (61°F) in April versus 15°C (59°F) in March. The maximum temperature also sees a slight increase, with April topping out at 29°C (84°F) compared to March's 26°C (80°F). In terms of precipitation, April experiences significantly less rain, totaling only 20 mm (0.8 in) over just 2 days, while March has a higher rainfall of 38 mm (1.5 in) across 8 days. Additionally, humidity levels drop from 67% in March to 56% in April, contributing to a more comfortable atmosphere. For a detailed look at the weather conditions, visit San Diego weather in March.

April and May present a transition in weather, with both months showcasing mild temperatures and relatively low precipitation. In April, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), averaging 16°C (61°F). This month experiences about 20 mm (0.8 in) of precipitation over 2 days, with humidity levels averaging 56%. In contrast, May sees slightly warmer temperatures, with a minimum of 12°C (54°F) and a maximum of 25°C (78°F), averaging 17°C (62°F). Precipitation decreases to 16 mm (0.6 in) but occurs over more days, totaling 4, while humidity drops to a more comfortable 46%. This shift signifies a gradual warming trend as spring approaches its end. For a detailed breakdown of May weather, check out San Diego weather in May.

In comparing the weather of April and June, both months experience similar maximum temperatures, reaching up to 29°C (84°F). However, April tends to be cooler overall, with an average temperature of 16°C (61°F), compared to June's slightly warmer average of 18°C (65°F). Additionally, April sees more precipitation, with around 20 mm (0.8 in) falling over two days, while June is typically dry, registering only 2 mm (0.1 in) and experiencing no rainy days at all. Humidity levels are also lower in June at 48% compared to April's 56%, contributing to a more comfortable atmosphere. For a detailed look at weather conditions in June, check out San Diego weather in June.

April and July present distinct weather characteristics, reflecting the transition from spring to summer. In April, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), with an average of 16°C (61°F). This month typically sees about 20 mm (0.8 in) of precipitation over 2 days, and humidity levels hover around 56%. In contrast, July offers a warmer climate, with minimum temperatures starting at 16°C (62°F) and reaching up to 29°C (85°F), but with a higher average of 21°C (69°F). Remarkably, July experiences very little rain, averaging only 1 mm (0.1 in) without any rainy days, and lower humidity at 46%. For a detailed look at the conditions in July, you can check San Diego weather in July.

April and August present distinct weather patterns. In April, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), with an average of 16°C (61°F). The month sees a moderate amount of rainfall, totaling about 20 mm (0.8 in) over just two days, contributing to a humidity level of 56%. In contrast, August experiences warmer conditions, with minimum temperatures around 17°C (63°F) and an average of 21°C (71°F), while still reaching a high of 29°C (84°F). Precipitation is minimal in August, with only 1 mm (0.0 in) and no rainy days, resulting in lower humidity at 42%. For detailed information, check out San Diego weather in August.

April and September exhibit notable differences in weather patterns. In April, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), with an average temperature of 16°C (61°F). The month sees approximately 20 mm (0.8 in) of precipitation over two days, along with a humidity level of 56%. In contrast, September experiences warmer conditions, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 31°C (88°F) and an average of 21°C (70°F). This month is notably drier, receiving only 3 mm (0.1 in) of precipitation without any rainy days, and slightly lower humidity at 52%. For more detailed information on September conditions, you can refer to San Diego weather in September.

April and October both offer relatively mild weather, but there are notable differences. In April, the minimum temperature averages around 11°C (53°F), while in October, it's slightly warmer at 13°C (55°F). The average temperature in April is 16°C (61°F), compared to October's 20°C (68°F), making October generally warmer. However, October can reach a maximum temperature of 32°C (90°F), which is higher than April's 29°C (84°F). Precipitation is low in both months, with April receiving 20 mm (0.8 in) and October only 13 mm (0.5 in), occurring over the same number of days. Additionally, humidity is slightly higher in October at 58% compared to 56% in April. For more details on October weather, check out San Diego weather in October.

In comparing the weather of April and November, both months experience mild temperatures, with April averaging 16°C (61°F) while November has a slightly higher average of 17°C (63°F). The maximum temperatures are comparable as well, with April reaching up to 29°C (84°F) and November peaking at 27°C (81°F). Precipitation levels are similar, with April receiving 20 mm (0.8 in) and November slightly higher at 24 mm (0.9 in), both spanning just two days. Notably, humidity is higher in November at 66%, compared to April's 56%. For a more detailed look at November's weather, check out San Diego weather in November.

April and December in San Diego showcase contrasting weather conditions. April typically experiences milder temperatures with an average of 16°C (61°F) and a maximum of 29°C (84°F), accompanied by relatively low humidity at 56% and minimal precipitation of just 20 mm (0.8 in) over about 2 days. In contrast, December sees cooler temperatures, averaging around 15°C (59°F) and peaking at 24°C (76°F), with higher humidity levels at 74% and more substantial rainfall of 60 mm (2.4 in) spread over 5 days. For a detailed look at December weather, check out San Diego weather in December.

Compare San Diego's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in San Diego

April in San Diego is a delightful transition into spring, boasting pleasantly mild temperatures and significantly less rainfall compared to the winter months. With temperatures averaging a comfortable 16°C (61°F), nature awakens in vibrant colors, enticing residents and visitors alike to explore the outdoors. While the city experiences only a couple of days with light precipitation, the 56% humidity keeps the air feeling fresh and invigorating. As the landscape transforms, it’s the perfect time to revel in the beauty of San Diego’s parks and coastal views. For more insights into the region's weather patterns, check out San Diego Climate.