Last updated: February 24, 2025
Experience the sizzling summer of July in San Marcos, United States, where temperatures soar with a maximum of 41°C (106°F) and an average of 29°C (84°F), providing the perfect backdrop for outdoor adventures. Evenings bring some relief with a refreshing minimum temperature of 17°C (63°F). Expect a splash of summer rain, with precipitation totaling 79 mm (3.1 in) over about 9 days, contributing to a humidity level of 66%. Embrace the warmth and occasional showers that define this vibrant month in San Marcos!
In July, San Marcos experiences its summer peak, characterized by warm temperatures that can make the most dedicated sun-seeker feel the heat. With a minimum of 17°C (63°F) and reaching up to a sizzling 41°C (106°F), the average temperature hovers at a comfortable 29°C (84°F). This trend marks a clear escalation from the previous months, as June’s highs of 37°C (100°F) laid the groundwork for the summer's intensity. The warmth of July not only calls for beach outings and backyard barbecues but also signifies a notable shift from the winter chill, creating a vibrant atmosphere where outdoor activities thrive under the blazing sun. This month, therefore, stands out as a key period for enjoying all that San Marcos has to offer in its sun-soaked glory.
In July, San Marcos experiences a notable dip in precipitation compared to the preceding months, receiving 79 mm (3.1 in) of rain over 9 days. This amount marks a decrease from the 102 mm (4.0 in) recorded in June, indicating a shift towards drier conditions as summer progresses. Despite the reduction, July remains relatively moist compared to other months like January and November. Rainfall peaks during the late spring with May's hefty 149 mm (5.9 in), but as the summer heats up, the frequency and intensity of rainfall seem to stabilize, setting the stage for the hotter months ahead. Overall, July's precipitation serves as a reminder of the transitional weather patterns characteristic of this time of year in San Marcos.
In San Marcos, the humidity trends throughout the year reveal a noticeable shift by July, when humidity dips to 66%—the lowest level since the start of the year. This decline is part of a gradual decrease from the late spring months, where humidity peaks at a steamy 81% in May. Following July, the humidity continues to drop, reaching its summer low of 58% in August. As the seasons change, the city experiences a return to relatively higher humidity levels in the fall and winter months, with December hitting 86%. This fluctuation illustrates San Marcos' transition from a humid summer to a more comfortable autumn, making July a refreshing respite from the high humidity typically associated with earlier months.
In July, San Marcos experiences a peak in its UV Index, remaining at an extreme 12, just like the previous month. This consistent level signifies that sun exposure can lead to skin damage within just 10 minutes, making it crucial for residents and visitors to take protective measures. Interestingly, the UV Index in the early summer months has steadily increased from 5 in January to this extreme rating, highlighting a significant trend of rising solar intensity as the year progresses. With August expected to mirror July's UV conditions, it's essential to stay vigilant in sun safety this summer. For more detailed information, check out the San Marcos UV Index.
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In July, San Marcos basks in the glory of 348 hours of sunshine, making it one of the sunniest months of the year. This vibrant burst of sunlight follows a steady increase since the start of spring, where April and May lay the groundwork with 260 and 282 hours respectively. By June, residents and visitors alike enjoy the flourishing warmth, as the hours rise to 329. This upward trend peaks in July before tapering off slightly as summer transitions into autumn. August maintains the summer spirit with an impressive 329 hours of sunshine, reflecting a consistent mid-year glow that invites outdoor activities and joyous gatherings under the sun.
In San Marcos, the month of July sees a notable dip in the likelihood of sunny weather, with only a 31% chance of sun. This trend stands in stark contrast to the more favorable months earlier in the year, such as January, where sunshine is nearly twice as likely. After experiencing a gradual decline from May's 29%, July marks the beginning of a slight recovery with the subsequent months like August and September trending back towards higher probabilities. While July may not boast the brightest weather, the overall pattern suggests a seasonal variability, making the later summer months more promising for sun-seekers.
In July, San Marcos enjoys approximately 13 hours of daylight, a slight decrease from the peak of 14 hours experienced in June. This mid-summer month signifies a transition as daylight gradually wanes, moving towards the shorter days of autumn. Interestingly, the trend from January to July showcases a steady increase in daylight hours, peaking in June before stabilizing in July and August. As summer progresses, residents and visitors can revel in extended evenings, perfect for outdoor activities, before the days begin to shorten once again in the fall months. The rhythmic ebb and flow of daylight throughout the year beautifully illustrates nature's cycle and the changing seasons.
In July, the winds in San Marcos reach their annual low, with an average speed of just 2.5 m/s (6 mph). This marks a noticeable drop from the more dynamic spring months, where average winds hovered around 4.1 m/s in March. As summer sets in, the consistent gentle breezes provide a calm backdrop, making July ideal for leisurely outdoor activities. Interestingly, while the winds decline during the peak of the summer, they are expected to pick up again in the fall, suggesting a seasonal rhythm that brings a refreshing change as the year progresses.
The weather in San Marcos changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of July'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 July, the weather in San Marcos is characterized by warm temperatures, with a minimum of 17°C (63°F) and an average high of 29°C (84°F), occasionally soaring up to 41°C (106°F). The month experiences a considerable amount of heat and humidity, with an average humidity of 66% and 79 mm (3.1 in) of precipitation over about 9 days. In contrast, January brings a much colder climate, with temperatures ranging from a minimum of -7°C (19°F) to an average of 11°C (52°F), and a maximum of 26°C (80°F). While January is drier with only 48 mm (1.9 in) of precipitation spread over 6 days, it has a higher humidity level of 79%. These stark differences highlight the seasonal variations in San Marcos weather. For a detailed overview of January conditions, visit San Marcos weather in January.
In contrast to the scorching heat of July, where temperatures soar from a minimum of 17°C (63°F) to an average of 29°C (84°F) and can reach highs of 41°C (106°F), February presents a much cooler climate. During this winter month, temperatures can drop as low as -15°C (6°F), with an average of 12°C (54°F) and a maximum of 31°C (87°F). While July sees about 79 mm (3.1 in) of precipitation over 9 days with a humidity level of 66%, February experiences slightly less rainfall at 60 mm (2.4 in) over 10 days, accompanied by higher humidity at 79%. For a deeper dive into February's climate specifics, check out San Marcos weather in February.
July and March present stark contrasts in weather conditions. In July, temperatures can reach a sweltering maximum of 41°C (106°F), with an average temperature of 29°C (84°F) and a minimum of 17°C (63°F). The month experiences around 79 mm (3.1 in) of precipitation over approximately 9 days, accompanied by a humidity level of 66%. In contrast, March boasts a much milder climate, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 33°C (91°F) and an average of 17°C (64°F). Though it sees slightly less rainfall at 67 mm (2.6 in) over 11 days, March has a higher humidity level of 74%. For more detailed insights, you can check San Marcos weather in March.
July and April present distinctly different weather patterns in San Marcos. July boasts much higher temperatures, with an average of 29°C (84°F) and maximums reaching up to 41°C (106°F), compared to April's milder average of 20°C (69°F) and a maximum of 35°C (94°F). While both months experience a similar number of rainy days—9—the precipitation in April is slightly higher at 89 mm (3.5 in) compared to July’s 79 mm (3.1 in). Additionally, humidity levels are higher in April at 76%, while July sees a relatively lower humidity of 66%. For more details on April’s weather, visit San Marcos weather in April.
In comparison to July, May experiences milder temperatures, with a minimum of 10°C (51°F) and an average of 25°C (76°F), while July's temperatures range from a minimum of 17°C (63°F) to a scorching maximum of 41°C (106°F). Although May has higher precipitation at 149 mm (5.9 in) over 14 days, July still sees notable rain with 79 mm (3.1 in) spread across 9 days. Additionally, humidity levels are greater in May at 81%, compared to July’s 66%. For a detailed look at weather patterns, visit San Marcos weather in May.
In comparing the weather of July and June, July shows a noticeable increase in temperature, with average highs reaching up to 41°C (106°F) compared to June's maximum of 37°C (100°F). Both months start with a minimum temperature of 17°C (63°F), but July's average temperature rises to 29°C (84°F), outpacing June's average of 27°C (82°F). However, July experiences slightly less precipitation at 79 mm (3.1 in) over 9 days, compared to June's 102 mm (4.0 in) over 12 days. Additionally, humidity levels tend to be lower in July at 66%, while June exhibits higher humidity at 76%. For further details, you can explore San Marcos weather in June.
In comparing the weather of July and August, both months showcase warm temperatures, but with some notable differences. July features a minimum temperature of 17°C (63°F) and a maximum of 41°C (106°F), while August starts slightly warmer at a minimum of 20°C (68°F) and a similar maximum of 40°C (104°F). Average temperatures remain consistent at around 29°C (84°F in July and 85°F in August).
However, August sees increased precipitation, with 111 mm (4.4 in) over 7 days, compared to 79 mm (3.1 in) over 9 days in July. Additionally, humidity drops from 66% in July to 58% in August, making August feel slightly less sticky despite the higher rainfall. For more specifics on August weather, you can check San Marcos weather in August.
July and September weather in San Marcos exhibit notable differences. July boasts higher temperatures, with a minimum of 17°C (63°F) and an average of 29°C (84°F), peaking at a scorching 41°C (106°F). In contrast, September sees cooler temperatures, with a minimum of 11°C (53°F) and an average of 26°C (79°F), with a maximum of 38°C (100°F). Precipitation also changes between the two months; July experiences 79 mm (3.1 in) over 9 wet days, while September receives more rainfall at 112 mm (4.4 in) across 11 days. Despite the increase in rain, humidity stays relatively stable, hovering around 66% in July and dipping slightly to 65% in September. For more detailed insights on September's weather, check out San Marcos weather in September.
In July, the weather is typically hot, with minimum temperatures around 17°C (63°F) and average highs reaching up to 41°C (106°F). The month sees a fair amount of precipitation, measuring 79 mm (3.1 in) over about 9 days, accompanied by a humidity level of 66%. In contrast, October offers a much cooler climate, with minimum temperatures dipping to 3°C (37°F) and average highs at a more moderate 35°C (96°F). With 94 mm (3.7 in) of rainfall over approximately 10 days and a rise in humidity to 74%, October presents a significant change in weather patterns. For more details on October weather, you can check San Marcos weather in October.
In July, temperatures soar with a minimum of 17°C (63°F) and an average high reaching a scorching 29°C (84°F), occasionally peaking at a sweltering 41°C (106°F). This month sees considerable humidity at 66% and experiences about 79 mm (3.1 in) of precipitation over 9 days. In contrast, November brings a significant drop in temperature, with minimums plummeting to -3°C (26°F) and averages settling around 15°C (60°F), while maximum temperatures can still reach 30°C (86°F). The month experiences less rainfall, with 49 mm (1.9 in) over just 6 days, but a higher humidity level of 81%. For more details, check San Marcos weather in November.
In July, temperatures in San Marcos can soar, with average highs reaching around 29°C (84°F) and potential peaks of up to 41°C (106°F). The month experiences moderate rainfall, totaling about 79 mm (3.1 in) over approximately 9 days, accompanied by a humidity level of 66%. In contrast, December brings a much cooler climate, where temperatures range from a chilly minimum of -3°C (27°F) to a mild maximum of 29°C (84°F), with an average of 13°C (55°F). Precipitation is slightly lower at 73 mm (2.9 in) over 7 days, but humidity increases to 86%. For more detailed information about December weather, check out San Marcos weather in December.
Overall, July presents a hot and humid environment, while December offers a much colder and damp atmosphere.
July in San Marcos is a vibrant month marked by intense heat and notable humidity, setting it apart from the cooler, more temperate months of the year. With maximum temperatures soaring and an average warmth that invites both adventure and relaxation, this summer month draws residents and visitors alike to outdoor activities despite the occasional afternoon shower. The significant humidity adds a layer of mugginess, reminding everyone of the Texas summer's unique character. For those looking to better understand the seasonal changes and their impact on local life, exploring the broader context of the area's climate is essential. For more detailed insights, check out San Marcos Climate.