Last updated: February 24, 2025
In April, San Antonio experiences a vibrant mix of warm temperatures and occasional rainfall. With a maximum temperature reaching 35°C (95°F) and an average of 21°C (70°F), the month offers a pleasant climate for outdoor activities. However, residents should be prepared for cooler nights, with minimum temperatures dipping to 3°C (37°F). The city sees about 71 mm (2.8 in) of rainfall across 8 days, contributing to its 76% humidity. This combination of warmth and moisture enhances the beauty of the spring season, making it an ideal time to enjoy the lush landscapes and blooming flora that characterize San Antonio.
In April, San Antonio experiences a vibrant transition into spring, with temperatures showcasing a noticeable warmth compared to the previous months. The minimum temperature rises to 3°C (37°F), allowing for milder mornings, while the average climbs to a comfortable 21°C (70°F), setting the stage for outdoor activities and blooming landscapes. As the sun heats up, residents can enjoy maximum temperatures reaching 35°C (95°F), marking a significant jump from the cooler days of winter. This trend of increasing warmth not only heralds the arrival of summer but also invites a flurry of vibrant festivals and cultural events that make the most of the pleasant weather. Overall, April is a delightful month in San Antonio, blending refreshing warmth with the blossoming beauty of spring.
April marks a significant uptick in precipitation for San Antonio, with an average of 71 mm (2.8 in) spread over 8 days. This pattern represents a continuation of the steadily increasing moisture levels observed since January, where monthly totals have risen from 44 mm to April's totals, reflecting the arrival of spring. The city's precipitation peaks in May, but April serves as a crucial precursor, setting the stage for the wetter months ahead. The consistent rainfall not only nourishes the landscape but also heralds the vibrant blooms characteristic of the season, making it a pivotal month in San Antonio's annual climate cycle.
April in San Antonio experiences a slight dip in humidity, averaging 76%, which reflects a continuation of the decreasing trend seen since March. This moderate humidity level provides a pleasant break before the more humid months of May and June, where levels rise to 81% and 76%, respectively. January and February maintain a higher consistency at 79%, suggesting that the early months of the year are generally more humid. As the year progresses into summer, humidity begins to decline significantly, particularly in July and August, when it drops to 66% and 58%. Overall, April serves as a transitional month where the humidity begins to ease just before the onset of the summer heat, setting the stage for upcoming seasonal changes.
In April, San Antonio experiences a significant surge in UV radiation, reaching an extreme UV Index of 11. This increase from the previous months highlights a trend of intensifying sun exposure as spring progresses, with burn times dropping to just 10 minutes. As temperatures rise and days grow longer, residents and visitors alike should take precautions to protect their skin during this peak season of sun activity. The months leading into summer forecast similarly high UV levels, staying consistent at 11 in May and even climbing to 12 in June through August. For more information on managing sun exposure, explore the details at San Antonio UV Index.
UV Risk Categories
April in San Antonio marks a delightful transition into spring, showcasing 252 hours of sunshine that heralds warmer days ahead. This month stands out as a vibrant precursor to the summer months, where sunlight steadily builds, culminating in June’s impressive 325 hours. The upward trend from the dreary winter months, starting with 169 hours in January and gradually climbing through March's 223 hours, reflects a blossoming energy as nature awakens. After April's peak, sunnier days continue into May and the thick of summer, where sunlit hours reach their zenith, proving that San Antonio revels in its abundant sunshine, fostering an atmosphere of warmth and vitality.
As spring unfolds in San Antonio, the likelihood of sunny weather in April dips to 40%, slightly lower than the preceding months of January and February, which boast chances of sunshine at 59% and 45%, respectively. This trend reflects a seasonal transition where sunnier days tend to give way to the unpredictability of spring weather. While April offers glimpses of warmth and brightness, the chance of encountering overcast skies lingers, increasing the anticipation for the arrival of more consistent sunny weather in the following months, particularly in September when the sun shines the brightest again at 61%. Thus, while April may not be the sunniest month, it serves as a bridge to the sunnier days ahead.
As April unfolds in San Antonio, residents enjoy an invigorating 12 hours of daylight, consistent with the prior month of March. This marks a delightful transition from the shorter winter days, where January only offered 10 hours. The increasing daylight is indicative of the approaching summer, with May bringing even longer days at 13 hours. This gradual extension leads into the summer months, where daylight remains plentiful, peaking from June through August. Following this peak, daylight begins to recede, signaling a return to the cozy briefness of winter as the year progresses. April serves as a harmonious blend of light and warmth, inviting outdoor activities and making it a cherished month in the seasonal rhythm of San Antonio.
In April, San Antonio experiences a delightful transition in its wind patterns, with an average wind speed of 3.9 m/s (or 9 mph). This marks a slight decrease from the more blustery month of March, which enjoyed a peak wind speed of 4.0 m/s. As spring unfolds, the winds remain gentle but noticeable, providing a refreshing backdrop for outdoor activities. Notably, April's winds average comparable speeds to those of the preceding months while still embracing the overall trend of slightly declining wind intensities leading into the summer. Combined with the warming temperatures, the month is characterized by a breezy charm that invites residents and visitors alike to enjoy the blossoming landscapes of this vibrant city.
The weather in San Antonio 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 Antonio and find detailed weather information for every month.
April and January weather in San Antonio present a striking contrast. In April, temperatures range from a minimum of 3°C (37°F) to a maximum of 35°C (95°F), with an average temperature of 21°C (70°F), while January sees cooler conditions with temperatures dipping as low as -7°C (20°F) and reaching a high of 27°C (81°F), resulting in an average of 11°C (53°F). April experiences significantly more precipitation at 71 mm (2.8 in) over 8 days, compared to January's 44 mm (1.7 in) over just 6 days. Humidity levels are relatively close, with April at 76% and January slightly higher at 79%. For a more detailed look at January's climate, check out San Antonio weather in January.
When comparing the weather in April and February, it’s clear that April experiences significantly warmer temperatures, with a minimum of 3°C (37°F) and an average of 21°C (70°F), whereas February sees much colder conditions with a minimum of -12°C (10°F) and an average of 13°C (55°F). Although February can reach a maximum of 31°C (87°F), the overall warmth of April is highlighted by its peak temperature of 35°C (95°F). In terms of precipitation, April is slightly wetter with 71 mm (2.8 in) over about 8 days, compared to February's 58 mm (2.3 in) spread over 10 days. Humidity levels are relatively similar, with April at 76% and February just a notch higher at 79%, indicating both months can feel quite humid. For more specific information about February weather, check out San Antonio weather in February.
In comparing the weather between March and April, April showcases a notable increase in temperatures with a minimum of 3°C (37°F) and an average of 21°C (70°F), climbing up to a maximum of 35°C (95°F). In contrast, March experiences cooler temperatures, with a minimum of -3°C (27°F) and an average of 18°C (65°F), peaking at 33°C (91°F). While April sees slightly more precipitation at 71 mm (2.8 in) over 8 days, March is not far behind with 62 mm (2.5 in) across 9 days. Both months have relatively high humidity levels, with April at 76% and March at 74%. For more details, check San Antonio weather in March.
April and May showcase a transition in weather patterns, with May generally being warmer and wetter than April. In April, temperatures range from a minimum of 3°C (37°F) to a maximum of 35°C (95°F), with an average temperature of 21°C (70°F). The month experiences around 71 mm (2.8 in) of precipitation over 8 days, accompanied by a humidity level of 76%. In contrast, May sees a notable increase in both temperature and precipitation, with minimums rising to 11°C (51°F) and maximums reaching 37°C (99°F), yielding an average temperature of 25°C (77°F). Furthermore, May receives 130 mm (5.1 in) of rain spread over 15 days, resulting in a higher humidity of 81%. For a detailed look into May's weather patterns, you can visit San Antonio weather in May.
In April, temperatures range from a cool minimum of 3°C (37°F) to an average of 21°C (70°F), peaking at a warm 35°C (95°F). This month experiences about 71 mm (2.8 in) of precipitation over 8 days, with a consistent humidity level of 76%. In contrast, June sees a significant increase in temperatures, with a minimum of 18°C (64°F) and an average of 28°C (83°F), reaching as high as 39°C (103°F). Despite slightly higher precipitation at 78 mm (3.1 in) over 12 days, humidity remains unchanged at 76%. For more specifics on June weather, you can check San Antonio weather in June.
April and July exhibit distinct weather patterns. In April, temperatures swing from a minimum of 3°C (37°F) to a maximum of 35°C (95°F), with an average of 21°C (70°F). The month is characterized by considerable humidity at 76% and experiences about 71 mm (2.8 in) of precipitation over 8 days. In contrast, July offers a warmer climate with minimum temperatures of 17°C (64°F), reaching highs of 41°C (106°F) and averaging 29°C (85°F). Precipitation is slightly lower at 69 mm (2.7 in) but maintains a similar pattern of occurring on 8 days, albeit with reduced humidity at 66%. For more details on conditions specific to July, check San Antonio weather in July.
April and August present distinct weather patterns, reflecting the transition from spring to summer. In April, temperatures can vary significantly, ranging from a brisk 3°C (37°F) to a scorching 35°C (95°F), with an average temperature of 21°C (70°F). The month experiences higher humidity at 76%, along with 71 mm (2.8 in) of precipitation spread over eight days. In contrast, August offers warmer conditions, with minimum temperatures around 20°C (69°F) and maximum temperatures reaching up to 40°C (103°F), averaging 30°C (86°F). Additionally, August enjoys lower humidity at 58% and less precipitation, totaling 56 mm (2.2 in) over just six days. For a deeper look at the specifics of August weather, you can visit San Antonio weather in August.
April and September present distinctly different weather patterns. In April, temperatures range from a chilly minimum of 3°C (37°F) to a warm maximum of 35°C (95°F), with an average temperature of 21°C (70°F). The month experiences about 71 mm (2.8 in) of rain over approximately 8 days, combined with a higher humidity of 76%. In contrast, September boasts warmer averages, with temperatures ranging from a minimum of 12°C (54°F) to a scorching maximum of 39°C (102°F), and an average temperature of 27°C (80°F). It also sees increased precipitation at 117 mm (4.6 in) over about 10 days, but with lower humidity at 65%. For those interested in more details, check out San Antonio weather in September.
April and October both offer mild temperatures, though October tends to be slightly warmer on average. In April, the average temperature reaches 21°C (70°F), with maximum highs up to 35°C (95°F), while October sees an average of 22°C (72°F) and can peak at 37°C (98°F). Both months experience a mix of precipitation, with April receiving 71 mm (2.8 in) over 8 days, compared to October's 89 mm (3.5 in) over 10 days. Humidity levels are similar in both months, hovering around 74-76%. For more specific details on October's climate, check out San Antonio weather in October.
April and November present distinct contrasts in weather patterns. In April, temperatures typically range from a minimum of 3°C (37°F) to a maximum of 35°C (95°F), with an average temperature of 21°C (70°F). This month experiences higher precipitation, averaging 71 mm (2.8 in) over about 8 days, and maintains a humidity level of 76%. In comparison, November sees cooler temperatures, with a minimum of -4°C (25°F) and an average of 16°C (61°F), peaking at a maximum of 32°C (90°F). The month has less rainfall, totaling 46 mm (1.8 in) across approximately 6 days, and a slightly higher humidity of 81%. For detailed insights, you can check out San Antonio weather in November.
April and December weather show a striking contrast in temperature and humidity. In April, the temperatures range from a minimum of 3°C (37°F) to a maximum of 35°C (95°F), with an average of 21°C (70°F), while December experiences cooler temperatures, with a minimum of -3°C (27°F), an average of 13°C (56°F), and a maximum of 29°C (85°F). Additionally, April is characterized by slightly higher precipitation levels at 71 mm (2.8 in) over 8 days, compared to December's 57 mm (2.3 in) across 7 days. Humidity levels are also notable, as April sees a humidity of 76%, whereas December is more humid at 86%. For more detailed information, check out San Antonio weather in December.
In April, San Antonio showcases a vibrant transition into spring, with warmer temperatures and increased humidity compared to the cooler, drier months of winter. The days bring a mix of warmth and the occasional rainfall, bringing life to the blossoming scenery. This month typically sees more precipitation than its predecessors, making it essential for locals and visitors alike to embrace the refreshing spring showers. As the city prepares for the heat of summer, April serves as a gentle reminder of the dynamic climate that defines the region. To learn more about the overall weather patterns, check out San Antonio Climate.