Last updated: February 24, 2025
In August, the weather in San Marcos, United States, showcases a typical summer profile characterized by warm temperatures and moderate humidity. The maximum temperature can soar up to 40°C (104°F), while the average rests at a comfortable 29°C (85°F), making outdoor activities quite enjoyable during cooler hours. The minimum temperature dips to a pleasant 20°C (68°F), providing relief from the daytime heat. Despite the warmth, the region experiences a noteworthy precipitation amount of 111 mm (4.4 in) over approximately 7 days, reminding residents of the occasional summer showers. With an average humidity level of 58%, it’s a month where the air feels warm yet manageable, presenting a quintessential summer experience in this vibrant locale.
In August, San Marcos experiences some of its hottest temperatures of the year, with minimums reaching 20°C (68°F) and averages around 29°C (85°F). The maximum temperature can soar up to 40°C (104°F), creating a sultry atmosphere that embodies the height of summer. This trend of escalating warmth begins in the earlier months, with temperatures steadily rising from a chilly January and peaking in July and August. As the city transitions into September, a noticeable cooling occurs, plunging minimums to 11°C (53°F), signaling a shift towards the more moderate temperatures of fall. Overall, August stands out as a vibrant culmination of summer heat, drawing both locals and visitors to indulge in outdoor activities under the sun.
In August, San Marcos experiences a notable surge in precipitation, with totals reaching 111 mm (4.4 in) over a more condensed period of just 7 days. This increase reflects a pattern of summer rains that emerge after the drier months of July, which recorded only 79 mm (3.1 in). The August rainfall starts to bridge the gap towards the more substantial precipitation typically seen in September, where amounts slightly escalate to 112 mm (4.4 in). This trend not only indicates the transition from summer to fall but also showcases the city's varied climate, where the late summer months can deliver significant moisture, providing a lush backdrop as the season changes. Overall, August's rainfall contributes to San Marcos's rich and vibrant ecosystem, reminding residents of the cyclical nature of its weather patterns.
In August, San Marcos experiences a noticeable dip in humidity, dropping to 58%, the lowest point of the year. This significant decrease follows the trend of rising humidity during the earlier months, where January and February boast a consistent 79%. As the summer progresses, humidity begins to decline, hitting 66% in July. The shift to August marks a refreshing change from the sticky heat of earlier summer months, offering residents and visitors a more comfortable atmosphere. However, this reprieve is short-lived, as humidity levels begin rising again in September, returning to 65%. The overall pattern reveals a cyclical rhythm to humidity in San Marcos, with August standing out as a transitional period that hints at the onset of fall.
In August, San Marcos experiences a continued trend of extreme UV Index levels with a steady rating of 12, indicating a heightened risk for sunburn with a minimal burn time of just 10 minutes. Following the pattern established earlier in the summer months of June and July, this profound intensity reflects the peak of the sunlight exposure season. As you navigate outdoor activities, it’s crucial to take precautions, like seeking shade or wearing protective clothing, to avoid harmful effects. This extreme measure persists into September, where the UV Index drops only slightly to 11. For further details and precautions, check out San Marcos UV Index.
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August is a radiant continuation of the sun-drenched summer in San Marcos, with an impressive 329 hours of sunshine that mirrors the brilliance of July. This warmth is part of a remarkable pattern of increasing daylight that begins in the early months of the year, culminating in the summer's peak. After January's 170 hours, there is a steady ascent that sees each month—particularly from March to July—basking in the bright embrace of sunshine, hitting a high of 348 hours in July. Following this golden stretch, August maintains this abundant light, serving as a gentle reminder of summer's splendor before transitioning into the slightly cooler fall months. With September and October witnessing a decrease, the delightful August days invite residents and visitors to savor the last hints of summer's brilliance.
In San Marcos, the likelihood of sunny weather in August presents a notable dip, with only a 37% chance of sunshine. This trend reflects a broader pattern where the summer months, specifically June and July, experience even lower sun probabilities, peaking in earlier months such as September at 59%. Comparatively, August is among the least sunny months, trailing behind the sunnier early winter and late summer days. As the region transitions from the hotter summer months, residents can expect more variability in weather, with the return of sunnier skies as fall approaches.
In San Marcos, United States, the month of August enjoys a delightful 13 hours of daylight, continuing the trend of long summer days. This duration mirrors the previous month, July, which also boasted 13 hours, showcasing a peak in daylight as the region basks in the warmth of summer. Progressing from the shorter days of winter—where January and February each offer a mere 10 and 11 hours respectively—there's a remarkable upward trend from March through June, where daylight reaches a full 14 hours in the height of summer. As summer ebbs into fall, daylight begins to gradually wane, with September seeing a slight decrease to 12 hours, paving the way for the shorter days of autumn and winter ahead. The rhythmic shift in daylight hours provides a beautiful seasonal tapestry, inviting residents to relish the long, sun-soaked days of August.
In August in San Marcos, the breezes tend to become gentler, as evidenced by an average wind speed of 2.7 m/s (6 mph). This marks a slight increase from the preceding month of July, which recorded the calmest winds of the year at a mere 2.5 m/s (6 mph). As summer draws to a close, the winds maintain their mild demeanor, showcasing a consistent trend of lower speeds compared to the early months of the year. From January to April, the average wind speeds typically hover around 3.4 to 4.1 m/s (8 to 9 mph), creating a refreshing contrast to the summer stagnation. This gentle August breeze, while not overly strong, captures the essence of late summer in San Marcos, inviting residents and visitors alike to enjoy the serene outdoor atmosphere.
The weather in San Marcos changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August'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.
August and January present strikingly contrasting weather conditions. In August, temperatures soar with a minimum of 20°C (68°F) and an average of 29°C (85°F), peaking at a scorching 40°C (104°F). This month also sees significant precipitation, totaling 111 mm (4.4 in) over about seven days, accompanied by a moderate humidity level of 58%. In contrast, January experiences much cooler temperatures, with a minimum of -7°C (19°F), an average of 11°C (52°F), and a maximum of 26°C (80°F). Precipitation is lower in January at 48 mm (1.9 in) over about six days, but the humidity is higher at 79%. For more detailed information on January conditions, you can check San Marcos weather in January.
August and February present strikingly contrasting weather patterns. In August, temperatures soar with a minimum of 20°C (68°F) and can peak at 40°C (104°F) on particularly hot days, accompanied by an average temperature of 29°C (85°F). However, this summer month also sees considerable humidity at 58% and approximately 111 mm (4.4 in) of precipitation over 7 days. In contrast, February experiences a much cooler climate, with temperatures ranging from a minimum of -15°C (6°F) to a comfortable average of 12°C (54°F) and a maximum of 31°C (87°F). This winter month features higher humidity at 79% and a lower total precipitation of 60 mm (2.4 in) over 10 days, making it a wetter month despite the colder temperatures. For more detailed insights, check San Marcos weather in February.
When comparing the weather in August and March, it's clear that August is characterized by much warmer temperatures and higher humidity. In August, the minimum temperature is around 20°C (68°F), averaging 29°C (85°F), and can reach a scorching maximum of 40°C (104°F). Conversely, March experiences cooler conditions, with a minimum of -3°C (27°F) and an average of 17°C (64°F), peaking at 33°C (91°F). Precipitation is also noteworthy; August sees 111 mm (4.4 in) over 7 days, while March has less at 67 mm (2.6 in) over 11 days. Interestingly, March has a higher humidity level at 74% compared to August's 58%. For a more detailed look at March weather, you can explore San Marcos weather in March.
April and August present quite contrasting weather conditions. In April, temperatures range from a cool 3°C (38°F) at night to a pleasant average of 20°C (69°F), peaking at a maximum of 35°C (94°F). The month experiences approximately 89 mm (3.5 in) of rainfall over 9 days, and humidity levels are relatively high at 76%. In contrast, August showcases much warmer temperatures, starting at a minimum of 20°C (68°F) and averaging around 29°C (85°F), with scorching highs reaching 40°C (104°F). Despite having less rainfall at 111 mm (4.4 in) over 7 days, August's humidity is notably lower at 58%. For a detailed overview of April's climatic conditions, you can visit San Marcos weather in April.
August and May exhibit contrasting weather patterns, reflecting the transition from spring to summer. In August, temperatures range from a minimum of 20°C (68°F) to a scorching maximum of 40°C (104°F), with an average of 29°C (85°F). The month sees around 111 mm (4.4 in) of precipitation over 7 days, accompanied by a moderate humidity level of 58%. In contrast, May features milder temperatures, with a minimum of 10°C (51°F), an average of 25°C (76°F), and a maximum of 36°C (98°F). However, it experiences more rainfall, totaling 149 mm (5.9 in) over 14 days, and higher humidity at 81%. For more detailed insights on May’s weather, visit San Marcos weather in May.
When comparing the weather in August and June, notable differences emerge in temperature, precipitation, and humidity levels. August tends to be hotter, with average temperatures of 29°C (85°F) and maximums reaching up to 40°C (104°F), while June has a slightly cooler average of 27°C (82°F) and a maximum of 37°C (100°F). Precipitation is relatively similar, with August receiving 111 mm (4.4 in) over 7 days compared to June's 102 mm (4.0 in) over 12 days. Additionally, June exhibits higher humidity at 76%, making it feel more humid than August's 58%. For more detailed information on June weather, check San Marcos weather in June.
When comparing the weather patterns of July and August, we see some notable similarities and differences. In July, the temperatures ranged from a minimum of 17°C (63°F) to a maximum of 41°C (106°F), with an average of 29°C (84°F). In contrast, August experienced slightly warmer minimum and average temperatures, with a low of 20°C (68°F) and maintaining the same average of 29°C (85°F), while the maximum temperature peaked at 40°C (104°F). Precipitation levels also varied, with July receiving 79 mm (3.1 in) over 9 days, compared to August's 111 mm (4.4 in) over 7 days, indicating that August was wetter despite having fewer rainy days. Humidity in July was higher at 66%, while August saw a decrease to 58%. For a more detailed analysis, you can check San Marcos weather in July.
August and September showcase a notable contrast in weather patterns. August typically presents warmer temperatures, with minimums around 20°C (68°F) and maximums soaring up to 40°C (104°F), averaging at 29°C (85°F). In contrast, September experiences a cooler minimum temperature of 11°C (53°F), while the average dips to 26°C (79°F) and maximums reach up to 38°C (100°F). Both months see significant precipitation, with August totaling 111 mm (4.4 in) over about 7 rainy days, while September has a slightly higher total of 112 mm (4.4 in) spread over 11 days. Moreover, September tends to be more humid, with levels at 65% compared to August’s 58%. For a deeper insight into September's weather specifically, you can visit San Marcos weather in September.
In August, the weather tends to be much hotter, with average temperatures reaching a peak of 29°C (85°F) and maximums soaring to 40°C (104°F). The month experiences considerable humidity at 58% and significant rainfall, totaling 111 mm (4.4 inches) over about 7 days. In contrast, October sees a marked drop in temperature, with minimums plummeting to 3°C (37°F) and average highs of 21°C (70°F). While October is slightly wetter with 94 mm (3.7 inches) of precipitation spread over 10 days, humidity levels rise to 74%, making the air feel quite different. For more detailed information, check out San Marcos weather in October.
August and November present stark contrasts in weather conditions. In August, temperatures soar, with a minimum of 20°C (68°F) and an average of 29°C (85°F), peaking at a scorching 40°C (104°F). This month experiences significant humidity at 58% and considerable rainfall, totaling 111 mm (4.4 in) over 7 days. In contrast, November brings a dramatic dip in temperatures, with a minimum of -3°C (26°F) and a more temperate average of 15°C (60°F), reaching a maximum of 30°C (86°F). The precipitation decreases to 49 mm (1.9 in) over just 6 days, paired with higher humidity levels of 81%. For more details on November weather, you can refer to San Marcos weather in November.
In August, the weather is characterized by warm to hot temperatures, with minimums around 20°C (68°F) and highs reaching up to 40°C (104°F). This month sees significant rainfall, averaging 111 mm over about 7 days, and humidity levels are relatively moderate at 58%. In contrast, December experiences much cooler temperatures, with a minimum of -3°C (27°F) and an average of 13°C (55°F), peaking at a maximum of 29°C (84°F). Although December has less rainfall at 73 mm, the humidity is notably higher at 86%. For specific details on December weather patterns, you can refer to San Marcos weather in December.
August in San Marcos brings a vibrant intensity that sets it apart from other months. With high temperatures reaching up to 40°C (104°F), this month is notably warmer, wrapping the city in a warm embrace. The average temperature of 29°C (85°F) offers a toasty climate that invites summer activities, while the minimum remains comfortable, ensuring pleasant evenings. However, humidity levels hover around 58%, adding a touch of stickiness to the air, and occasional rainfall, averaging 111 mm (4.4 in) across seven days, refreshes the landscape and helps cool the atmosphere. Overall, August’s unique blend of heat and humidity creates a distinct weather profile, making it an unforgettable time of year against the backdrop of San Marcos's natural beauty. For more detailed insights, visit San Marcos Climate.