March Weather in San Diego, United States

Last updated: February 24, 2025

In March, San Diego experiences a delightful transition into spring, with maximum temperatures reaching 26°C (80°F) and an average of 15°C (59°F), creating the perfect backdrop for outdoor adventures. Although the minimum temperature can drop to 8°C (47°F) during the cooler nights, the city’s charm remains undeniable. March averages a modest precipitation of 38 mm (1.5 in), spread over about 8 days, ensuring the landscape stays vibrant. With an average humidity of 67%, the atmosphere feels refreshing, inviting both locals and visitors to embrace all that this coastal paradise has to offer.

March Temperature in San Diego

March in San Diego ushers in a delightful transition towards warmer weather, with temperatures ranging from a minimum of 8°C (47°F) to a pleasant max of 26°C (80°F). This month boasts an average temperature of 15°C (59°F), gently warming from the cooler days of winter. The springtime climate brings a welcome boost in warmth, hinting at the balmy evenings ahead. Notably, the max temperature remains consistent with February's peak, suggesting a steady climb into the spring season. As daylight lengthens, both locals and visitors can enjoy the inviting warmth of San Diego's shores, making it an ideal time for outdoor adventures.

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

The chart illustrates March 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.

March Precipitation in San Diego

In March, San Diego experiences moderate precipitation, receiving 38 mm (1.5 in) of rain over 8 days, marking a slight decline from the wetter months of January and February. This trend hints at the transition into the drier season, as April typically sees even less rainfall, dropping to just 20 mm (0.8 in). The shifting patterns reveal a coastal climate that favors dry and sunny conditions approaching summer, with notable decreases in both total precipitation and number of rainy days as the year progresses. Residents can expect the month to serve as a bridge between the refreshing winter rains and the arid, sun-soaked days of summer that characterize the Southern Californian climate.

March Precipitation Trends in San Diego

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

In March, San Diego experiences a notable shift in humidity levels, with an average of 67%, a decrease from the previous month’s 77% in February. This drop marks the beginning of a trend toward drier months as the region transitions into spring. Following March, humidity continues to decline, reaching its lowest point in August at 42%. Interestingly, after the warmer summer months, humidity begins to creep back up in the fall, sitting at 52% in September and gradually rising again to 66% by November. This cycle highlights San Diego's typical seasonal fluctuations, where spring and summer bring lower humidity, making the coastal city an inviting destination for those seeking pleasant weather.

March Average Humidity in San Diego

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

March UV Index in San Diego

As March rolls in, San Diego experiences a noticeable rise in the UV Index, reaching 8 this month—marking the start of very high sun exposure conditions. With a burn time of just 15 minutes, it's crucial for residents and visitors to take precautions against harmful rays. This upward trend continues from February's UV Index of 6, which already advised high exposure vigilance. Looking ahead to April, the UV Index increases further to 10, signaling a sustained pattern of very high UV levels as the region transitions into spring. For anyone planning outdoor activities, understanding these shifts in UV intensity is vital for ensuring skin safety. For more detailed information, you can visit San Diego UV Index.

Maximum UV Index Levels in San Diego for March

The chart shows the monthly maximum UV Index (UVI) for San Diego in March, 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 March 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.

March Sunshine in San Diego

As March unfolds in San Diego, the city basks in an impressive 299 hours of sunshine, signaling a delightful transition from winter to spring. This increase in daylight marks a significant leap from January's modest 195 hours and continues the upward trend observed since February. With each passing month, San Diego inches closer to its sunniest peak in July, where residents can expect a staggering 376 hours of golden rays. The gradual ascent of sunshine hours ignites a vibrant atmosphere, as locals and visitors alike embrace outdoor adventures, al fresco dining, and the stunning coastal vistas that define this enchanting city. As spring settles in, March serves as a beautiful bridge, inviting everyone to relish the warmth and brightness ahead.

Monthly Sunshine Duration in San Diego: March Highlighted

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

Chance of Sun in San Diego During March

March in San Diego is notable for its consistent sunny disposition, boasting a 63% chance of sun, identical to both January and February. This stability hints at a transitional period as winter begins to fade, paving the way for warmer days ahead. As the month progresses, the likelihood of sunshine begins to dip into the spring, with April's chance dropping to 50%. Interestingly, the percentage of sunny days remains fairly steady through most months, but a noticeable uptick is seen again in the fall and winter months, suggesting that while March enjoys a generous share of sunshine, the sunniest days may still lie ahead later in the year.

Percentage of Sunny Days in March in San Diego

The chart illustrates the percentage of sunny days in San Diego throughout the year, with March 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 March chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Diego in March

As March unfolds in San Diego, residents revel in an increase in daylight, with the sun gracing the city for 12 hours each day. This transition marks a significant shift from the shorter days of January and February, setting the stage for longer, sunnier days ahead. The steady climb in daylight hours continues into April, when the duration reaches 13 hours, showcasing a delightful trend towards spring. This gradual increase not only enhances outdoor activities but also uplifts the spirits of locals and visitors alike, as the sunlit hours grow longer, inviting everyone to bask in the beauty of Southern California's climate. With each passing month, the anticipation of summer's peak daylight further amplifies the excitement for the vibrant days to come.

Average Daylight Hours in San Diego for March

The chart illustrates the variation in daylight duration in San Diego throughout the year, with March 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.

March Winds in San Diego

As March breezes into San Diego, it carries with it a noticeable uptick in wind speed, averaging 3.4 m/s (8 mph)—the highest for the year so far. This mild increase from February's gentle 2.7 m/s (6 mph) sets the stage for spring, inviting locals to enjoy outdoor activities with a refreshing gust in the air. Following March, the wind tends to soften slightly in April and May, hovering around 3.2 m/s (7 mph) and 3.1 m/s (7 mph), before maintaining a steady rhythm into the summer months. Overall, March serves as a pivotal transition point, signaling a shift in both temperature and energy as the landscape gears up for vibrant spring days.

Average March Wind Speed in San Diego

The chart displays monthly wind speed patterns in San Diego, with values for each month shown alongside March's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how March's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.02.73.4 m/s3.23.13.33.13.13.12.82.43.2
Data source: San Diego March wind data, generated using information from the Copernicus Climate Change Service.

How March 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 March'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 March and January, we see some notable differences. March generally experiences slightly warmer conditions, with average temperatures reaching up to 15°C (59°F) compared to January's average of 14°C (58°F). Interestingly, both months share the same minimum temperature of 8°C (47°F), but March sees a higher maximum temperature of 26°C (80°F) versus January's 25°C (77°F). Precipitation is slightly lower in March with 38 mm (1.5 in) spread over 8 days, while January has 45 mm (1.8 in) over just 5 days. Humidity levels remain fairly close, with March at 67% and January at 72%. For more detailed information, check out San Diego weather in January.

In comparing the weather of March and February, we see some notable differences. March generally experiences slightly warmer temperatures, with an average of 15°C (59°F) compared to February's 14°C (57°F). Both months share the same maximum temperature of 26°C (79°F), but February has a marginally cooler minimum temperature of 7°C (45°F) versus March's 8°C (47°F). When it comes to precipitation, March has less rain, recording 38 mm (1.5 in) over 8 days, whereas February sees more precipitation at 55 mm (2.2 in) across just 6 days. Additionally, humidity levels are higher in February at 77%, compared to March's 67%. For a deeper understanding of February's climate, you can check out San Diego weather in February.

March weather in San Diego tends to be cooler and wetter than in April. With minimum temperatures around 8°C (47°F) and maximums reaching up to 26°C (80°F), March experiences an average temperature of 15°C (59°F) alongside approximately 38 mm (1.5 in) of precipitation over about 8 days, resulting in a humidity level of 67%. In contrast, April sees a slight increase in temperatures, with minimums at 11°C (53°F) and maximums rising to 29°C (84°F), averaging around 16°C (61°F). Additionally, April is much drier, with only 20 mm (0.8 in) of rain over just 2 days, leading to a decrease in humidity down to 56%. For more detailed information, check out San Diego weather in April.

March and May exhibit distinct differences in weather patterns. In March, temperatures range from a minimum of 8°C (47°F) to a maximum of 26°C (80°F), with an average of 15°C (59°F). This month experiences more precipitation, totaling 38 mm (1.5 in) over approximately 8 days, and a higher humidity level of 67%. In contrast, May brings slightly warmer temperatures, with minimums around 12°C (54°F) and maximums reaching 25°C (78°F), averaging 17°C (62°F). Additionally, May is drier, with only 16 mm (0.6 in) of precipitation across about 4 days and lower humidity at 46%. For more details on weather conditions specific to this month, check out San Diego weather in May.

The weather in March is characterized by cooler temperatures, with a minimum of 8°C (47°F) and an average of 15°C (59°F), reaching up to a maximum of 26°C (80°F). This month also sees more rainfall, with approximately 38 mm (1.5 in) spread over 8 days, contributing to a higher humidity level of 67%. In contrast, June offers warmer conditions, starting at a minimum of 14°C (58°F) and averaging 18°C (65°F), with highs reaching 29°C (84°F). Notably drier, June only experiences about 2 mm (0.1 in) of precipitation and has no rainy days, resulting in a much lower humidity level of 48%. For a more detailed look at the weather during this month, you can check San Diego weather in June.

In March, the weather is moderately cool with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 26°C (80°F), while the average sits around 15°C (59°F). This month experiences approximately 38 mm (1.5 in) of precipitation over about 8 days, resulting in a humidity level of 67%. In contrast, July brings significantly warmer temperatures, with the minimum at 16°C (62°F) and a maximum reaching 29°C (85°F), alongside an average temperature of 21°C (69°F). The summer month is notably dry, with only 1 mm (0.1 in) of precipitation and no rainy days, leading to a lower humidity of 46%. For a more detailed look at the weather conditions in July, visit San Diego weather in July.

March and August present contrasting weather conditions. In March, temperatures range from a cooler minimum of 8°C (47°F) to a maximum of 26°C (80°F), with an average of 15°C (59°F). The month experiences about 38 mm (1.5 in) of precipitation over 8 days, contributing to a humidity level of 67%. In stark contrast, August boasts warmer weather with minimum temperatures of 17°C (63°F) and maximums reaching up to 29°C (84°F), resulting in an average temperature of 21°C (71°F). Notably, August is much drier, with only 1 mm (0.0 in) of precipitation and 0 rainy days, alongside lower humidity at 42%. For more insights, check out San Diego weather in August.

In comparing the weather between March and September, March presents a cooler climate with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 26°C (80°F) and an average of 15°C (59°F). This month experiences more rainfall, with an average precipitation of 38 mm (1.5 in) over about 8 days and a humidity level of 67%. In contrast, September boasts significantly warmer temperatures, with a minimum of 17°C (62°F), an average of 21°C (70°F), and a maximum reaching 31°C (88°F). It’s a much drier month, with only 3 mm (0.1 in) of precipitation recorded across zero rainy days and a lower humidity level of 52%. For more details about September weather, you can visit San Diego weather in September.

March and October exhibit notable differences in weather patterns. In March, temperatures range from a minimum of 8°C (47°F) to a maximum of 26°C (80°F), with an average of 15°C (59°F). The month sees about 38 mm (1.5 inches) of precipitation over 8 days, contributing to a higher humidity level of 67%. In contrast, October offers milder conditions with minimum temperatures of 13°C (55°F) and maximums reaching 32°C (90°F), averaging around 20°C (68°F). This month is notably drier, with only 13 mm (0.5 inches) of precipitation over just 2 days, and humidity dropping to 58%. For more detailed information, you can refer to San Diego weather in October.

March and November exhibit mild temperatures, with March experiencing a minimum of 8°C (47°F) and an average of 15°C (59°F), while November starts slightly warmer at a minimum of 10°C (51°F) and an average of 17°C (63°F). Both months have relatively pleasant maximum temperatures, with March reaching up to 26°C (80°F) and November peaking at 27°C (81°F). Precipitation is notably higher in March, with 38 mm (1.5 in) spread over 8 days, compared to November's lighter 24 mm (0.9 in) over only 2 days. In terms of humidity, both months are quite similar, with March at 67% and November at 66%. For more specific details on November weather patterns, visit San Diego weather in November.

March and December in San Diego share some similarities in temperature, with both months featuring a minimum of 8°C (47°F) and an average temperature of 15°C (59°F). However, March experiences slightly warmer maximum temperatures, reaching up to 26°C (80°F) compared to December's 24°C (76°F). Precipitation levels differ as well; December has more rain, totaling 60 mm (2.4 in) over just 5 days, while March receives 38 mm (1.5 in) across 8 days. Additionally, humidity is higher in December at 74%, compared to March's 67%. For more detailed insights, check out San Diego weather in December.

Compare San Diego's Climate with Cities Worldwide

Conclusion: What to Expect From March Weather in San Diego

As March unfolds in San Diego, the weather begins to show a charming transition from the cooler winter months to the inviting atmosphere of spring. With average temperatures rising, residents and visitors can enjoy the pleasant warmth, making it an ideal time for outdoor activities. Although March does see a bit more precipitation compared to the drier months ahead, the rain nourishes the blooming landscapes, adding vibrancy to the city. The humidity levels remain comfortable, providing a refreshing environment for both locals and travelers. For a deeper understanding of the unique climate characteristics throughout the year, be sure to check out San Diego Climate.