Last updated: February 24, 2025
March in San Antonio features a diverse range of temperatures, with daily highs reaching up to 33°C (91°F), while average temperatures sit at a comfortable 18°C (65°F). However, the month can also throw a chill, dipping to a minimum of -3°C (27°F). Rainfall is notable, accumulating to 62 mm (2.5 in) across approximately 9 days, creating a humid atmosphere with an average humidity level of 74%. This blend of warmth and intermittent showers not only enriches the landscape but also adds a refreshing twist to outdoor activities. Enjoy the dynamic weather of March in San Antonio!
In March, San Antonio begins to shake off the chill of winter, as temperatures gradually rise from a minimum of -3°C (27°F) to a maximum of 33°C (91°F). The average temperature hovers around 18°C (65°F), signaling a distinct transition into warmer months. This month marks the shift from the sporadic cold snaps of January and February, where lows reached -12°C (10°F), to the inviting warmth of spring. With each passing day, the city's vibrant landscape emerges, showcasing blossoms and greenery that thrive in the burgeoning heat. As daylight lasts longer, March sets the perfect stage for outdoor activities and exploring San Antonio's rich cultural heritage.
In March, San Antonio experiences a notable increase in precipitation, with 62 mm (2.5 in) of rain over 9 days, marking a shift from the drier winter months. This upward trend in rainfall is part of the region's gradual transition into spring, following 58 mm (2.3 in) in February. The increase sets the stage for the wetter months ahead, particularly as April and May bring even higher totals. With each passing month, not only does the amount of rainfall escalate, but the number of precipitation days also suggests a climate coming alive, bolstering the region's blooming flora and vibrant landscapes.
March in San Antonio marks a slight decline in humidity levels, settling at 74%, compared to the 79% experienced in both January and February. This modest drop suggests the onset of a transitional period as the city approaches warmer months. Following March, humidity begins to rise again in April, reaching 76%, and then escalates to 81% by May, indicating the effects of the approaching summer heat. Overall, the trend reveals that San Antonio's humidity fluctuates notably throughout the year, but March serves as a pivotal point where the air becomes a touch drier before the more humid conditions of late spring and summer take hold.
As March arrives in San Antonio, the UV Index soars to 9, landing firmly in the very high exposure category, which means that sun protection is essential. Notably, this marks a continuation of the upward trend observed since January, where the UV Index increased from a moderate 5 to a concerning 8 in February. With a burn time of just 15 minutes, March serves as a reminder that the sun's intensity is on the rise, preparing us for the even more extreme conditions that follow in April and May. As the seasons change, it’s crucial to stay informed and protect your skin from the sun's harmful rays. For more details on UV levels throughout the year, visit the detailed overview at San Antonio UV Index.
UV Risk Categories
As winter fades away, March in San Antonio radiates warmth and brightness, boasting an impressive 223 hours of sunshine. This marks a delightful increase from the previous months, showcasing a welcoming trend towards longer days. With the sun steadily climbing higher in the sky, San Antonians can look forward to even more sunshine in April, which brings 252 hours. This upward trajectory continues through the spring, peaking in the summer with July's 344 hours. The gradual yet noticeable expansion of daylight hours not only enhances the outdoor experience but also signals the onset of the vibrant Texas summer, making March a delightful transition into the sun-kissed months ahead.
As March unfolds in San Antonio, there's a 49% chance of sunny weather, marking a slight increase from the cooler months of January and February, which see chances of sunshine at 59% and 45% respectively. Notably, this early spring month presents more daylight than April, which dips to 40%. However, the trend shifts significantly as the year progresses, with the summer months of May and July showcasing lower probabilities of sun. Interestingly, the late summer and early fall months, particularly September, bring a refreshing contrast with a remarkable 61% chance of sunlight. This pattern illustrates a dynamic climate where early spring offers moderate sunlight, setting the stage for a balance of sun and shade throughout the year.
As March arrives in San Antonio, the city experiences a delightful shift in daylight duration, extending to 12 hours—a welcome increase from the 11 hours seen in February. This pattern marks the beginning of a gradual ascent toward longer days, as sunlight becomes more abundant leading into spring. With daylight peaking at 13 hours in both May and through much of summer, March's longer days signal a vibrant transition, enhancing outdoor activities and fostering a sense of renewal. As the season progresses, residents and visitors alike can look forward to basking in the sun’s warm embrace, making the most of every illuminating hour.
As March unfolds in San Antonio, the breeze begins to pick up, with an average wind speed of 4.0 m/s (9 mph), marking a subtle increase from the 3.7 m/s (8 mph) recorded in February. This uptick signals the arrival of spring, contributing to a refreshing atmosphere as temperatures rise. Interestingly, wind speeds in March are slightly higher than those in April, which averages 3.9 m/s (9 mph), suggesting that this month enjoys the briskest winds of the season. As the year progresses into the warmer months, the winds gradually taper off, with June and July seeing the calmest conditions at around 2.6-3.0 m/s (6-7 mph). Thus, March stands out as a pivotal transition month, embracing the invigorating essence of spring while hinting at the more tranquil days ahead.
The weather in San Antonio 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 Antonio and find detailed weather information for every month.
In comparing the weather between March and January, we see notable differences in temperature and precipitation. March experiences a wider temperature range, with a minimum of -3°C (27°F) and a maximum of 33°C (91°F), resulting in a pleasant average of 18°C (65°F). In contrast, January is cooler, with temperatures ranging from a minimum of -7°C (20°F) to a maximum of 27°C (81°F) and an average of 11°C (53°F). Precipitation is slightly higher in March, totaling 62 mm (2.5 in) over 9 days, compared to January's 44 mm (1.7 in) over 6 days. Additionally, while March has a humidity level of 74%, January is a bit higher at 79%. For a more detailed look at January's weather, check out San Antonio weather in January.
In comparing the weather between February and March, it is evident that March experiences a significant temperature increase, with average highs of 18°C (65°F) compared to February's average of 13°C (55°F). February sees colder minimum temperatures, dropping to -12°C (10°F), whereas March's minimum is just -3°C (27°F). Despite March having slightly more precipitation at 62 mm (2.5 in) over 9 days compared to February's 58 mm (2.3 in) over 10 days, both months have high humidity levels, with March at 74% and February at 79%. For a more detailed look at February weather, you can visit San Antonio weather in February.
March and April show a notable transition in weather patterns. March experiences a temperature range from a chilly minimum of -3°C (27°F) to a warm maximum of 33°C (91°F), while April sees slightly warmer temperatures, with a minimum of 3°C (37°F) and a maximum of 35°C (95°F). Precipitation is slightly higher in April at 71 mm (2.8 in) compared to March's 62 mm (2.5 in), although both months see a similar number of rainy days—9 in March and 8 in April. Humidity levels also rise slightly, with March averaging 74% and April at 76%. For a detailed look at April's weather, consider visiting San Antonio weather in April.
March and May present contrasting weather patterns, highlighting the transition from early spring to late spring. In March, temperatures begin at a chilly minimum of -3°C (27°F) and can rise to a maximum of 33°C (91°F), with an average of 18°C (65°F). However, this month also sees significant precipitation, totaling 62 mm (2.5 in) over about 9 days, contributing to a relatively high humidity level of 74%.
In contrast, May boasts a milder minimum temperature of 11°C (51°F) and an impressive maximum of 37°C (99°F), with an average temperature of 25°C (77°F). The rain increases in May, reaching 130 mm (5.1 in) over approximately 15 days, which corresponds to a slightly higher humidity of 81%. This comparison emphasizes how May generally offers warmer temperatures and increased rainfall compared to March, making it crucial for outdoor plans. For a deeper look into the specifics of May weather, check out San Antonio weather in May.
March and June present strikingly different weather patterns. In March, temperatures range from a chilly minimum of -3°C (27°F) to a warm maximum of 33°C (91°F), with an average of 18°C (65°F). The month experiences about 62 mm (2.5 in) of precipitation over 9 days, contributing to a humidity level of 74%. In contrast, June boasts much higher temperatures, with a minimum of 18°C (64°F), an average of 28°C (83°F), and soaring to a maximum of 39°C (103°F). Rainfall increases slightly to 78 mm (3.1 in), spread over 12 days, and humidity rises to 76%. The marked increase in both temperature and precipitation reflects the transition into the warmer, summer months. For more details, you can check San Antonio weather in June.
In March, the weather exhibits a more variable temperature range with minimums dipping as low as -3°C (27°F) and maximums reaching a warm 33°C (91°F). Average temperatures hover around a comfortable 18°C (65°F), accompanied by 62 mm (2.5 in) of precipitation over approximately 9 days and a humidity level of 74%. In contrast, July is characterized by consistently higher temperatures, with minimums starting at 17°C (64°F) and soaring to a scorching maximum of 41°C (106°F). The average temperature in July is a balmy 29°C (85°F), with slightly higher precipitation at 69 mm (2.7 in) over 8 days and a lower humidity level of 66%. For a closer look at the specifics, check out San Antonio weather in July.
In March, temperatures in San Antonio range from a chilly minimum of -3°C (27°F) to a warm maximum of 33°C (91°F), with an average of 18°C (65°F). The month experiences about 62 mm (2.5 in) of precipitation over 9 days, contributing to a relatively high humidity of 74%. In contrast, August boasts much warmer conditions, with minimum temperatures at a pleasant 20°C (69°F) and maximums reaching up to a scorching 40°C (103°F), averaging at 30°C (86°F). Precipitation in August is slightly lower at 56 mm (2.2 in) over 6 days, and humidity decreases to 58%. For more details on the weather specifics, check out San Antonio weather in August.
In March, temperatures in San Antonio range significantly, with a minimum of -3°C (27°F) and a maximum of 33°C (91°F), leading to an average temperature of 18°C (65°F). The month experiences moderate precipitation, totaling 62 mm (2.5 in) over approximately 9 days, coupled with a humidity level of 74%. In contrast, September brings warmer weather, with minimum temperatures of 12°C (54°F) and maximums reaching 39°C (102°F), averaging 27°C (80°F). This month also sees increased rainfall, with 117 mm (4.6 in) spread over about 10 days, though humidity drops to 65%. For more details on September weather, you can check San Antonio weather in September.
In March, temperatures range from a chilly minimum of -3°C (27°F) to a warm maximum of 33°C (91°F), with an average of 18°C (65°F). This month experiences about 62 mm (2.5 in) of precipitation over 9 days, while humidity hovers at 74%. In contrast, October brings milder weather, with temperatures starting from a minimum of 3°C (37°F), averaging 22°C (72°F) and peaking at 37°C (98°F). The month sees slightly higher precipitation at 89 mm (3.5 in) spread over 10 days, maintaining the same humidity level of 74%. For a closer look at specific conditions, check out San Antonio weather in October.
March and November exhibit some interesting similarities and differences in weather patterns. In March, temperatures can range from a brisk minimum of -3°C (27°F) to a warm maximum of 33°C (91°F), with an average of 18°C (65°F). The month sees about 62 mm (2.5 in) of precipitation over 9 days, accompanied by relatively high humidity at 74%. In contrast, November offers slightly cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 32°C (90°F), averaging around 16°C (61°F). Precipitation is lower in November, at 46 mm (1.8 in) over 6 days, but humidity is slightly higher at 81%. For more details, you can check San Antonio weather in November.
March and December showcase distinct weather patterns despite having similar minimum temperatures of -3°C (27°F). In March, the average temperature rises to a more pleasant 18°C (65°F), peaking at a warm 33°C (91°F), whereas December's average drops to a cooler 13°C (56°F) with a maximum of 29°C (85°F). Rainfall is slightly higher in March, totaling 62 mm (2.5 in) across 9 days, compared to December's 57 mm (2.3 in) over just 7 days. Additionally, December experiences higher humidity levels at 86%, while March holds a moderate humidity of 74%. For more information on December weather, you can visit San Antonio weather in December.
As March rolls into San Antonio, the transition from winter to spring becomes evident with a noticeable increase in temperatures and humidity. Unlike the cooler months before, March boasts warmer days that can reach high temperatures, while still holding onto some chill in the early mornings and evenings. Additionally, this month sees a spike in precipitation, contributing to the blossoming landscapes as nature reawakens. With around nine rainy days, March stands out as a month of rejuvenation, setting the stage for the warmer, drier months ahead. For a deeper dive into what to expect throughout the year, check out San Antonio Climate.