Last updated: February 24, 2025
In January, San Marcos experiences a mix of cool and mild weather, with maximum temperatures reaching 26°C (80°F), while the average temperature hovers around 11°C (52°F). The winter chill can be felt as the minimum temperature dips to -7°C (19°F) during the month. Rainfall is moderate, with precipitation amounting to 48 mm (1.9 in) over about 6 days, contributing to a relatively humid atmosphere with humidity levels averaging 79%. This blend of temperatures and moisture creates a unique winter experience for residents and visitors alike.
In January, San Marcos experiences a dynamic range of temperatures, starting the year with a minimum of -7°C (19°F) and rising to a comfortable average of 11°C (52°F). As the month progresses, highs can reach up to 26°C (80°F), showcasing the region's potential for surprising warmth amidst winter chill. This pattern of fluctuating temperatures continues into February, where the mercury dips lower and subsequently rebounds, hinting at the gradual transition towards spring. The coldest temperatures are often noted but are counterbalanced by an enticing average that encourages outdoor activity. Overall, January in San Marcos sets the tone for a year filled with diverse and vibrant weather, making it a unique time for both locals and visitors.
In January, San Marcos experiences a moderate level of precipitation, with 48 mm (1.9 in) spread across approximately 6 days. This sets the stage for the gradual increase in rainfall as winter transitions to spring, with February receiving a little more at 60 mm (2.4 in) and an uptick in precipitation days. By March, rainfall escalates further to 67 mm (2.6 in), establishing a clear upward trend leading into the wetter months. The most significant jump occurs in May, where precipitation peaks at 149 mm (5.9 in) over 14 days, showcasing the region's wettest season. This steady increase in both rainfall amount and days hints at the lush landscapes that emerge as spring gives way to summer, before eventually tapering off again in the late months of the year.
In January, San Marcos experiences a notable humidity level of 79%, consistent with the preceding month of December, which highlights the cool and damp winter atmosphere. As the season transitions into February, the humidity remains steady at 79%, suggesting a prolonged period of moisture in the air. However, as spring approaches, March sees a slight decline to 74%, marking the beginning of a gradual decrease. This trend continues into April with a slight rebound at 76%, before May brings a surge back to 81%, likely due to the warming temperatures and budding vegetation. The summer months introduce a more pronounced drop, culminating in July and August with humidity levels reaching 66% and 58% respectively, providing a refreshing contrast. As autumn sets in, humidity levels begin to rise once more, peaking at 86% in December, resembling the winter conditions observed at the start of the year. Overall, this cyclical pattern illustrates a clear seasonal rhythm in humidity, painting a vivid picture of San Marcos’ climate throughout the year.
In January, San Marcos experiences a moderate UV Index of 5, indicating that while the sun's rays can cause some skin damage, outdoor enthusiasts are generally safe with a burn time of approximately 30 minutes. As the months progress toward spring, the UV Index significantly increases, peaking at an extreme level of 12 from June to August, where the burn time reduces to just 10 minutes. This upward trend continues through much of the spring, with very high levels in February and March, then transitioning to the extreme category by April. Interestingly, as the year winds down, UV exposure levels gradually decrease, reverting back to a moderate index in both December and January. For those planning outdoor activities throughout the year, it's essential to stay informed about the changing UV conditions. For more details, visit San Marcos UV Index.
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In San Marcos, the January sunshine offers a promising start to the year with 170 hours of sunshine, setting the tone for the months to follow. As winter gives way to spring, the sunlight gradually increases, with February shedding 165 hours—a slight dip before the sunshine breaks out in March with 229 hours. The trend continues upward, peaking in the summer months of June and July, where residents bask in a generous 329 and 348 hours, respectively. Following this peak, the sunlight gently tapers off in August and September, featuring 329 and 277 hours, before descending into the softer light of autumn, which still offers a respectable 230 hours in November. Overall, this data paints a vibrant picture of San Marcos's seasonal sunshine, offering a delightful backdrop for outdoor activities throughout the year.
In San Marcos, January boasts a 58% chance of sunny weather, making it one of the brighter months of the year. This ray of sunshine stands out against a backdrop of fluctuating probabilities, with February dipping to 44% and March rising slightly to 50%. As the seasons progress into spring, the chances of sun dip further, with April at 41% and May plummeting to just 29%. Fortunately, the sun shines brighter again come September, hitting 59%, indicating that while early winter is generally sunny, the transition into summer can lead to cloudier days. This trend highlights January as a cozy month for those seeking sunnier skies before the unpredictability of spring sets in.
In San Marcos, the month of January ushers in about 10 hours of daylight, setting the stage for a gradual increase as the year progresses. As February arrives, the daylight extends to 11 hours, heralding the arrival of spring with longer, sunnier days. This trend continues through March and April, where daylight reaches 12 hours, before peaking in June with an impressive 14 hours of brightness—perfect for outdoor adventures and soaking in the sun. Following this high, daylight hours begin to taper off, settling back to 13 hours in July and August. By September, daylight descends to 12 hours, and as the year wanes, the duration drifts back to 10 hours by November and December. This rhythmic cycle not only marks the seasons but also invites residents to embrace the vibrant changes in nature throughout the year.
In January, the winds in San Marcos gently usher in the new year with an average speed of 3.4 m/s (8 mph), setting a calm tone. As the months progress, a noticeable trend emerges; February and March see a mild uptick in wind speeds, reaching 3.9 m/s (9 mph) and 4.1 m/s (9 mph) respectively, suggesting a slight invigorating shift as spring approaches. However, this breezy exuberance tapers off by April and May, returning to 3.9 m/s and 3.6 m/s. The summer months bring a notable decline, with June, July, and August experiencing the most tranquil days, averaging between 2.5 m/s and 2.9 m/s (6 mph). As the year draws to a close, the winds reestablish a gentle rhythm with velocities returning to 3.4 m/s (8 mph) in December, highlighting the unique seasonal ebb and flow of San Marcos wind patterns.
The weather in San Marcos 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 Marcos and find detailed weather information for every month.
In January, temperatures in San Marcos range from a minimum of -7°C (19°F) to a maximum of 26°C (80°F), with an average temperature of 11°C (52°F). The month sees about 48 mm (1.9 in) of precipitation over 6 days, maintaining a consistent humidity level of 79%. In contrast, February experiences colder nights with minimum temperatures dropping to -15°C (6°F) and slightly higher average and maximum temperatures of 12°C (54°F) and 31°C (87°F), respectively. This month receives more precipitation, totaling 60 mm (2.4 in) over 10 days, while humidity remains steady at 79%. For those interested in more detailed weather patterns for February, you can find additional information here: San Marcos weather in February.
In January, the weather in San Marcos is characterized by cooler temperatures, with a minimum of -7°C (19°F) and an average of 11°C (52°F), while the maximum can reach up to 26°C (80°F). The month experiences moderate precipitation, totaling 48 mm (1.9 in) over about six days, alongside relatively high humidity at 79%. In contrast, March brings a noticeable warmth, with temperatures ranging from a minimum of -3°C (27°F) to an average of 17°C (64°F) and a maximum spike of 33°C (91°F). The month sees an increase in precipitation to 67 mm (2.6 in) over approximately 11 days, and humidity levels decrease slightly to 74%. For more detailed information, check out San Marcos weather in March.
In January, the weather in San Marcos experiences a chilly start with minimum temperatures dropping to -7°C (19°F) and an average of 11°C (52°F), while highs can reach up to 26°C (80°F). This month sees around 48 mm (1.9 in) of precipitation over approximately 6 days, accompanied by a humidity level of 79%. In contrast, April brings a noticeable warming trend, with minimum temperatures rising to 3°C (38°F) and an average of 20°C (69°F), peaking at 35°C (94°F). Precipitation increases to 89 mm (3.5 in) over about 9 days, although humidity slightly decreases to 76%. For more details on the weather in April, you can visit San Marcos weather in April.
In January, the weather in San Marcos is quite chilly, with average temperatures ranging from a minimum of -7°C (19°F) to a maximum of 26°C (80°F). The month experiences about 48 mm (1.9 in) of precipitation over six days, along with a relatively high humidity level of 79%.
Conversely, May ushers in much warmer conditions, with temperatures ranging from a minimum of 10°C (51°F) to a scorching maximum of 36°C (98°F), yielding an average temperature of 25°C (76°F). Precipitation also increases significantly to 149 mm (5.9 in) over 14 days, coupled with humidity slightly higher at 81%. For more detailed information, check out San Marcos weather in May.
January and June present strikingly different weather conditions. In January, temperatures range from a chilly minimum of -7°C (19°F) to a more comfortable average of 11°C (52°F), peaking at a maximum of 26°C (80°F). The month experiences around 48 mm (1.9 in) of precipitation over approximately 6 days, with a humidity level of 79%. In contrast, June boasts much warmer temperatures, with a minimum of 17°C (63°F), an average of 27°C (82°F), and highs reaching a scorching 37°C (100°F). This summer month sees more precipitation, totaling 102 mm (4.0 in) over 12 days, while maintaining a slightly lower humidity of 76%. For more specifics on June weather conditions, you can check this link: San Marcos weather in June.
When comparing the weather in January and July, significant differences become apparent. January typically experiences much colder temperatures, with averages around 11°C (52°F), peaking at a maximum of 26°C (80°F) and dipping as low as -7°C (19°F). In contrast, July boasts much warmer conditions, featuring an average temperature of 29°C (84°F) and highs that can reach up to 41°C (106°F).
In terms of precipitation, January sees about 48 mm (1.9 in) over 6 days, while July has increased rainfall, totaling 79 mm (3.1 in) across 9 days. Additionally, January's high humidity level of 79% contributes to a noticeable chill, whereas July's humidity drops to 66%, making the heat more bearable. For more detailed information, check out San Marcos weather in July.
In January, temperatures in San Marcos fluctuate between a chilly minimum of -7°C (19°F) and a comfortable maximum of 26°C (80°F), with an average of 11°C (52°F). The month sees around 48 mm (1.9 in) of precipitation spread over 6 days, accompanied by relatively high humidity of 79%. In contrast, August brings significantly warmer conditions, with minimum temperatures starting at 20°C (68°F) and soaring to a maximum of 40°C (104°F), averaging 29°C (85°F). Rainfall increases to 111 mm (4.4 in) over 7 days, but humidity drops to a more comfortable 58%. For more details on August weather, visit San Marcos weather in August.
January and September present contrasting weather conditions in San Marcos. In January, temperatures range from a chilly minimum of -7°C (19°F) to an average of 11°C (52°F), peaking at a mild 26°C (80°F). The month experiences about 48 mm (1.9 in) of precipitation over approximately 6 days, coupled with high humidity levels at around 79%. In stark contrast, September boasts much warmer weather with minimum temperatures starting at 11°C (53°F) and averaging 26°C (79°F), soaring to a maximum of 38°C (100°F). The month also sees increased rainfall, totaling 112 mm (4.4 in) over 11 days, but with a lower humidity rate of 65%. For a detailed look at September's climate, check out San Marcos weather in September.
In January, temperatures in San Marcos range from a chilling minimum of -7°C (19°F) to a comfortable maximum of 26°C (80°F), with an average of 11°C (52°F). The month experiences about 48 mm (1.9 in) of precipitation over approximately 6 days, paired with a relatively high humidity of 79%. In contrast, October showcases a much warmer climate, with temperatures ranging from a low of 3°C (37°F) to a scorching high of 35°C (96°F), averaging around 21°C (70°F). Precipitation increases to 94 mm (3.7 in) across 10 days, and humidity drops slightly to 74%. For more details on October weather specifics, you can visit San Marcos weather in October.
When comparing the weather in January and November, we notice some interesting differences despite similar precipitation levels. In January, temperatures can drop as low as -7°C (19°F), with an average of 11°C (52°F) and a high of 26°C (80°F). November, on the other hand, has milder minimum temperatures at -3°C (26°F), with a more comfortable average of 15°C (60°F) and a higher maximum of 30°C (86°F). Both months experience 6 days of precipitation, but November tends to feel slightly more humid at 81% compared to January's 79%. For a deeper look into November's climate, check out San Marcos weather in November.
In comparing the weather between January and December, January tends to be cooler with a minimum temperature dropping to -7°C (19°F) and an average of 11°C (52°F), while December's temperatures are milder, ranging from a minimum of -3°C (27°F) to an average of 13°C (55°F). Additionally, December receives more precipitation at 73 mm (2.9 in) compared to January's 48 mm (1.9 in), although both months see relatively similar rainfall days, with December having 7 days of rain versus January's 6. Humidity levels are also higher in December at 86% compared to January's 79%. For more details on December weather, you can check San Marcos weather in December.
January in San Marcos showcases a cooler and more variable climate compared to the warmer and more stable temperatures of other months. With maximum temperatures reaching a modest 26°C (80°F), and frequent lows around 11°C (52°F), visitors can expect a refreshing chill in the air that contrasts sharply with the heat of summer. Additionally, precipitation is more common during this month, with about 48 mm (1.9 in) of rain falling over approximately 6 days. As humidity levels hover around 79%, the air can feel notably damp, adding a layer of coolness to the winter atmosphere. For those interested in a broader perspective on the yearly climate, check out San Marcos Climate.