Last updated: February 24, 2025
January in San Antonio presents a blend of mild temperatures and notable humidity, providing a refreshing winter atmosphere. With a maximum temperature reaching 27°C (81°F) and an average of 11°C (53°F), residents can enjoy a mix of cool and pleasant days. However, early mornings can feel brisk, with a minimum temperature dropping to -7°C (20°F). January also sees approximately 44 mm (1.7 in) of precipitation across 6 days, contributing to a relatively high humidity level of 79%. Overall, this month offers a unique charm, making it an ideal time for outdoor activities while embracing the warmth of the southern winter.
In January, San Antonio experiences a refreshing range of temperatures that begins with a chilly minimum of -7°C (20°F), creeping up to a pleasant maximum of 27°C (81°F). The average temperature sits comfortably at 11°C (53°F), providing a crisp but mild winter atmosphere. As the month unfolds, the temperatures signal the approach of spring, with noticeable trends toward warmer days. This transitional phase hints at the dramatic rise in heat that follows in February, where temperatures can dip lower, but ultimately lead into a warming trend as March arrives, showcasing an increase in average temperatures to 18°C (65°F). The progression into the year clearly indicates a shift from winter's grasp to the eventual embrace of warmer days, making January a unique month filled with the promise of change in San Antonio's climate.
In January, San Antonio experiences a relatively mild start to the year with 44 mm (1.7 in) of precipitation spread over approximately 6 days. This amount marks the beginning of a gradual increase in rainfall, as February sees a rise to 58 mm (2.3 in) over 10 days. As the months progress, precipitation tends to accumulate, peaking in May with a significant 130 mm (5.1 in) over 15 days. Notably, January's drier climate establishes a trend of increasing rainfall leading into the late spring, preparing the region for the vibrant growth typical of the warmer months. Overall, the early winter precipitation lays the groundwork for a lush and lively environment as the seasons transition.
In January, San Antonio experiences a notable humidity level of 79%, mirroring the conditions of the following month. This consistent moisture sets the stage for a moderately humid winter, which gradually transitions into spring. As the year progresses, humidity levels fluctuate, peaking in May and November at 81% and further escalating in December to 86%. Interestingly, summer months bring a dip in humidity, with July at 66% and August dropping to 58%, providing a brief respite from the dampness. The trend suggests that while early and late months are characterized by higher humidity, the summer offers a welcome change, allowing residents to enjoy the sunny weather without feeling overwhelmed by moisture.
In January, San Antonio experiences a moderate UV Index of 5, indicating that while sun exposure can lead to harmful effects, it is generally safer compared to the upcoming months. With a burn time of about 30 minutes, residents and visitors can enjoy the outdoors with relative caution. However, as the year progresses into February and March, the UV Index significantly escalates to 8 and 9 respectively, entering the very high category, where burn times drop to just 15 minutes. This trend of increasing UV intensity culminates in the peak summer months, where the Index reaches an alarming 12, categorized as extreme, suggesting burn times can plummet to a mere 10 minutes. Following this peak, the UV levels gradually taper off, returning to moderate levels by December. For more insights and to track the UV Index throughout the year, visit San Antonio UV Index.
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In January, San Antonio basks in 169 hours of sunshine, setting the stage for a gradual increase as winter gives way to spring. As February rolls in, the days grow slightly longer with 162 hours of sun, hinting at the upcoming warmth. By March, the city experiences a delightful surge to 223 hours, a clear precursor to the vibrant season ahead. April shines even brighter at 252 hours, while May pushes the record up to 276 hours, teasing the arrival of summer. The peak is reached in June and July, with an impressive 325 and 344 hours respectively, wrapping the city in a golden embrace. Although the hours begin to dip in August at 330 hours, the dazzling summer months clearly set a high standard. As the year transitions to autumn, September and October still enjoy 276 and 264 hours of sunshine, ensuring San Antonio remains a bright destination. The year concludes with 223 hours in November and 218 hours in December, reflecting the cyclical nature of sunshine in this vibrant city.
In January, San Antonio boasts a 59% chance of sunny weather, making it one of the brighter months of the year. This trend stands in stark contrast to the following months, where the likelihood of sunshine dips, particularly in February with only 45% and April at 40%. However, as the year progresses, September reclaims the spotlight with a 61% chance, showcasing a seasonal resurgence in sunny days. Despite January leading the pack, the data reveals a captivating ebb and flow of sunshine throughout the calendar, emphasizing the unique climate personality of San Antonio.
In January, San Antonio enjoys approximately 10 hours of daylight, a subtle reminder of winter's lingering grasp. As the month unfolds, the days gradually lengthen, leading to 11 hours of daylight in February. This trend continues into March and April, where daylight reaches a peak of 12 hours. The progression into May marks a transition into longer summer days, peaking at 13 hours for the next four months. However, as summer wanes into autumn, daylight begins to recede, gently falling back to 12 hours in September and tapering off to 11 and then 10 hours in October and November, respectively. By December, San Antonio returns to 10 hours of daylight, closing the cycle as winter approaches once more. This ebb and flow of daylight not only defines the rhythm of the seasons but also enriches the experience of life in this vibrant city.
In January, San Antonio experiences a gentle breeze with an average wind speed of 3.3 m/s (7 mph), setting the tone for a relatively mild start to the year. As we transition into February, the winds pick up slightly to 3.7 m/s (8 mph), hinting at a subtle increase in the air's movement. March, with its 4.0 m/s (9 mph) winds, marks the peak for the first quarter, bringing forth a refreshing change as spring approaches. However, this upward trend begins to taper off in April with winds returning to 3.9 m/s (9 mph) and further declining throughout the warmer months, reaching a calm 2.6 m/s (6 mph) in both July and August. Interestingly, as autumn arrives, the breezes start to pick up again, stabilizing around 3.0 m/s (7 mph) by November and then dipping slightly as the year closes out in December. Overall, January sets a foundational breeze that ebbs and flows, mirroring the changing seasons in this vibrant Texas 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 January'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 January, temperatures range from a minimum of -7°C (20°F) to a maximum of 27°C (81°F), with an average of 11°C (53°F). The month experiences around 44 mm (1.7 in) of precipitation over approximately 6 days, while humidity remains relatively high at 79%. In contrast, February shows a slightly colder minimum temperature of -12°C (10°F) and a higher maximum of 31°C (87°F), with an average temperature of 13°C (55°F). Precipitation increases to 58 mm (2.3 in) over about 10 days, maintaining a consistent humidity level of 79%. For more detailed weather information, visit San Antonio weather in February.
In January, the weather in San Antonio is characterized by cooler temperatures, with a minimum of -7°C (20°F) and an average of 11°C (53°F), peaking at 27°C (81°F). The month experiences about 44 mm (1.7 in) of precipitation over six days and a humidity level of 79%. In contrast, March sees a significant warming trend, with temperatures ranging from a minimum of -3°C (27°F) to an average of 18°C (65°F) and reaching a maximum of 33°C (91°F). Precipitation increases to 62 mm (2.5 in) over nine days, while humidity dips slightly to 74%. For more details on the weather in March, you can visit San Antonio weather in March.
January and April exhibit distinct differences in weather patterns. January experiences cooler temperatures, with a minimum of -7°C (20°F) and an average of 11°C (53°F), while April enjoys milder conditions, boasting a minimum of 3°C (37°F) and a significantly higher average of 21°C (70°F). The maximum temperatures in April can reach as high as 35°C (95°F), in contrast to January's maximum of 27°C (81°F). Precipitation is slightly more prevalent in April, with 71 mm (2.8 in) and 8 days of rain compared to January's 44 mm (1.7 in) over 6 days. Humidity remains relatively consistent, with January at 79% and April at 76%. For more detailed information, check out San Antonio weather in April.
In January, temperatures in San Antonio range from a chilly minimum of -7°C (20°F) to a pleasant maximum of 27°C (81°F), with an average temperature of 11°C (53°F). The month experiences relatively low precipitation, totaling 44 mm (1.7 in) over just 6 days, and maintains a humidity level of 79%.
In stark contrast, May brings warmer weather, with temperatures ranging from a minimum of 11°C (51°F) to a scorching maximum of 37°C (99°F) and an average temperature of 25°C (77°F). The month is much wetter, recording 130 mm (5.1 in) of rainfall across 15 days, while humidity remains steady at 81%.
For more detailed information, you can visit San Antonio weather in May.
In January, the weather features a cooler range with minimum temperatures dropping to -7°C (20°F) and an average of 11°C (53°F), which contrasts sharply with June's much warmer conditions, where the minimum temperature starts at 18°C (64°F) and the average climbs to a comfortable 28°C (83°F). January experiences less precipitation, with 44 mm (1.7 inches) over just 6 days, while June has a higher total of 78 mm (3.1 inches) spread across 12 days. Despite the increase in rainfall during the summer month, humidity remains relatively steady, with January at 79% and June slightly lower at 76%. For more detailed information on the weather patterns, you can check San Antonio weather in June.
In January, the weather is quite cool, with temperatures ranging from a minimum of -7°C (20°F) to a maximum of 27°C (81°F), and an average temperature of 11°C (53°F). The month sees about 44 mm (1.7 in) of precipitation over 6 days and maintains a relatively high humidity level of 79%. In contrast, July experiences a much warmer climate, with temperatures soaring from a minimum of 17°C (64°F) to a sweltering maximum of 41°C (106°F), averaging 29°C (85°F). Precipitation increases to 69 mm (2.7 in) over 8 days, while humidity drops to a more comfortable 66%. For a more detailed look at what to expect, check out San Antonio weather in July.
January and August present stark contrasts in weather. In January, temperatures can drop to a minimum of -7°C (20°F), with an average of 11°C (53°F) and a maximum of 27°C (81°F). The month sees around 44 mm (1.7 in) of precipitation over six days, accompanied by high humidity at 79%. In contrast, August boasts much warmer temperatures, with a minimum of 20°C (69°F) and reaching up to 40°C (103°F) on hot days, resulting in an average of 30°C (86°F). Despite slightly higher precipitation at 56 mm (2.2 in) over the same number of rainy days, August's humidity is notably lower at 58%. For further details, check out San Antonio weather in August.
January and September present contrasting weather patterns. In January, temperatures range from a chilly minimum of -7°C (20°F) to a mild maximum of 27°C (81°F), with an average of 11°C (53°F). The month experiences 44 mm (1.7 in) of precipitation across 6 days, accompanied by relatively high humidity at 79%. In comparison, September boasts warmer temperatures, with a minimum of 12°C (54°F) and a sweltering maximum of 39°C (102°F), leading to an average of 27°C (80°F). It also sees a significant increase in precipitation, totaling 117 mm (4.6 in) over 10 days, but with a lower humidity of 65%. For more specific details about the weather in September, you can check San Antonio weather in September.
In January, the weather is considerably colder, 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). The month experiences relatively low precipitation, totaling 44 mm (1.7 in) over just 6 days, and is characterized by a high humidity of 79%. In contrast, October sees much milder conditions, with temperatures fluctuating between a minimum of 3°C (37°F) and a maximum of 37°C (98°F), while averaging 22°C (72°F). Rainfall is more frequent, accumulating 89 mm (3.5 in) over 10 days, and the humidity is slightly lower at 74%. For more details, check out San Antonio weather in October.
When comparing the weather in January and November, both months exhibit relatively mild temperatures with notable differences. January experiences a minimum of -7°C (20°F) and an average of 11°C (53°F), while November boasts a warmer minimum of -4°C (25°F) and a higher average of 16°C (61°F). Maximum temperatures in November can reach as high as 32°C (90°F), compared to a maximum of 27°C (81°F) in January. Precipitation levels are similar, with January recording 44 mm (1.7 in) and November slightly higher at 46 mm (1.8 in), both occurring over six days. Humidity remains fairly consistent, with January at 79% and November at 81%. For a detailed look at what to expect in November, check out San Antonio weather in November.
In comparing the weather of January and December, we observe some notable differences. January has a wider temperature range, with minimums dipping to -7°C (20°F) and maximums reaching up to 27°C (81°F), resulting in a chilly average of 11°C (53°F). In contrast, December features slightly milder temperatures, starting from a minimum of -3°C (27°F) and reaching a maximum of 29°C (85°F) with an average of 13°C (56°F). Precipitation is also heavier in December, totaling 57 mm (2.3 in) over 7 days compared to January's 44 mm (1.7 in) across 6 days. Additionally, the humidity is slightly higher in December at 86% versus 79% in January, making December feel a bit more damp. To learn more about the specifics of December weather, you can check out San Antonio weather in December.
January in San Antonio marks a notable shift in weather compared to the warmer months, bringing cooler temperatures and increased humidity. With daytime highs around a mild 27°C (81°F) and nights dipping as low as -7°C (20°F), this month stands out for its more varied temperature range. Although rainfall is relatively light, with about 44 mm spread over just six days, the air feels noticeably heavier due to humidity levels averaging 79%. Embrace the unique charm of San Antonio's January weather, which offers a welcome respite from the summer heat, making it an ideal time for exploration. For a deeper dive into the climatological nuances, check out San Antonio Climate.