Last updated: February 24, 2025
Experience the dynamic October weather in San Marcos, United States, where temperatures swing from a maximum of 35°C (96°F) to a refreshing minimum of 3°C (37°F). The average temperature hovers around a comfortable 21°C (70°F), providing an inviting climate for outdoor activities. Expect a total precipitation of 94 mm (3.7 in) spread across 10 days, contributing to a humidity level of 74% that enhances the lush, vibrant scenery of the area. Whether you're basking in the warmth or enjoying the cooler evenings, October in San Marcos promises a blend of delightful weather experiences.
In October, San Marcos enjoys a delightful transition into autumn, with temperatures that vividly reflect the changing season. The average temperature sits comfortably at 21°C (70°F), providing a warm yet refreshing backdrop for outdoor activities. Mornings may start brisk, with lows around 3°C (37°F), but the afternoons can still reach a pleasant 35°C (96°F), reminiscent of the summer's warmth. This month marks a gradual cooling trend compared to the sweltering summer months of July and August, making it an ideal time for exploring the region's vibrant landscapes. As the year progresses into November, the average begins to dip further, highlighting October as a sweet spot for those seeking mild weather before winter sets in.
In October, San Marcos experiences a notable shift in precipitation patterns, with an average rainfall of 94 mm (3.7 in) spread over 10 days. This marks a slight decrease in both volume and frequency compared to the preceding months, September's 112 mm and 11 days of rain. As autumn unfolds, the region begins to transition from the heavier summer showers, which peak in May with 149 mm, to more moderate offerings typical of the fall. The consistent trend of October rain showcases the area's gradual drying out, yet still provides enough moisture to keep the landscape lush and vibrant as it prepares for the winter months ahead.
In October, San Marcos experiences a humidity level of 74%, which is a slight increase from the drier summer months but still lower than the humidity peaks found in both the spring and winter. As summer transitions into fall, humidity gradually rises from a low of 58% in August to October's 74%, indicating the area's gradual shift towards a more humid climate. This trend reflects a common yearly pattern in which humidity levels typically start high in the winter, dip during the summer, and then begin to climb again into autumn. With November bringing a significant rise to 81%, it's clear that San Marcos embraces the lush and humid conditions of the season as the year draws to a close.
As October unfolds in San Marcos, the UV Index registers a notable drop to 9, categorizing it as very high, with a burn time of just 15 minutes. This month marks a transition from the extreme UV levels of summer, which peaked at 12 in June, July, and August, reminding residents and visitors alike of the ongoing need for sun protection. While September maintained an eleven in the UV Index, October signifies the beginning of more moderate exposure, although caution is still advised. As the days grow shorter, keeping track of the UV Index remains essential for safe outdoor activities. For more information on the UV Index throughout the year, check out San Marcos UV Index.
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As October unfolds in San Marcos, the city basks in 270 hours of radiant sunshine, a splendid continuation of the region's vibrant fall days. Following the summer peak with 348 hours in July, sunlight begins to taper, yet the warmth persists, maintaining a rich ambiance. Unlike the more pronounced drop in sun hours seen in November, which sits at 230 hours, October enjoys a comfortable balance, offering both ample daylight and a relief from the summer heat. This trend of decreasing sunshine from the intense brightness of summer toward the milder days of autumn reflects the natural ebb and flow of the seasons, inviting residents and visitors alike to relish the dazzling golden hues that define this picturesque month.
In San Marcos, the month of October offers a promising 52% chance of sunny weather, striking a balance between the warmer summer months and the cooler fall. This slight uptick in sunshine compared to the summer months, particularly July (31%) and August (37%), indicates a transition towards crisper, more pleasant days. Notably, October's sun chance closely aligns with both March and November, which sit at 50% and 57%, respectively. This trend suggests that while the days grow shorter, residents can still expect a fair share of sunshine, making October an ideal time for outdoor activities before the winter chill sets in.
As October rolls into San Marcos, residents can expect about 11 hours of daylight, marking a subtle decline from the summer peak of 14 hours in June. The daylight gradually dips from a robust 13 hours in May through the warmer months, stabilizing at 12 hours in September. This trend reflects the changing seasons, as days grow shorter leading into the cozy ambiance of fall. While October brings a slight reduction in sunshine, it also ushers in the rich colors of autumn, inviting evenings spent under the stars as daylight wanes. With daylight reaching its minimum of 10 hours in November, this month serves as a gentle reminder of nature's cyclical rhythm.
As October unfolds in San Marcos, the wind begins to pick up slightly from the summer lull, averaging 3.1 m/s (7 mph). This marks a modest increase compared to the calmest months of July through September, which hovered around 2.5 m/s (6 mph). The transition into fall brings a refreshing breeze, reminiscent of the lively spring months, where wind speeds reached their peak at 4.1 m/s (9 mph) in March. This invigorating shift not only enhances the changing scenery but also invites outdoor enthusiasts to enjoy the pleasant weather before winter sets in. The gradual increase in wind speed hints at the seasonal changes ahead, bridging the gap between the summer warmth and the upcoming coolness of November.
The weather in San Marcos changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October'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 October, temperatures in San Marcos range significantly from a chilly 3°C (37°F) to a warm 35°C (96°F), with an average of 21°C (70°F). The month experiences about 94 mm (3.7 in) of precipitation over 10 days, contributing to a humidity level of 74%. In stark contrast, January sees much cooler conditions, with temperatures dropping to a minimum of -7°C (19°F) and peaking at 26°C (80°F), averaging around 11°C (52°F). Precipitation in January is lower at 48 mm (1.9 in) over just 6 days, and the humidity rises slightly to 79%. For more details, you can check San Marcos weather in January.
October and February present contrasting weather patterns. In October, temperatures can range from a chilly 3°C (37°F) at night to a warm 35°C (96°F) during the day, with an average temperature of 21°C (70°F). This month experiences about 94 mm (3.7 in) of rainfall over roughly 10 days, alongside a humidity level of 74%.
In contrast, February showcases much cooler temperatures, with nighttime lows plummeting to -15°C (6°F) and daytime highs reaching up to 31°C (87°F), averaging around 12°C (54°F). Although February sees less precipitation at 60 mm (2.4 in), it still experiences rain over 10 days and a slightly higher humidity level of 79%. For more detailed information, you can check San Marcos weather in February.
In comparing the weather patterns of October and March, one can observe distinct differences in temperatures and precipitation. October showcases a warm climate with average temperatures around 21°C (70°F) and highs reaching up to 35°C (96°F), while March tends to be cooler, with average temperatures of 17°C (64°F) and minimums dipping to -3°C (27°F). Precipitation is slightly lower in March at 67 mm (2.6 in), compared to October's 94 mm (3.7 in), although both months experience a similar level of humidity at 74%. For a detailed look into March's specific weather conditions, check out San Marcos weather in March.
October and April share some similarities in weather patterns, particularly in temperature and humidity. Both months experience a minimum temperature around 3°C (37°F to 38°F) and an average temperature in the low 20s Celsius (about 20-21°C or 69-70°F). However, October tends to be slightly warmer with maximum temperatures reaching up to 35°C (96°F), while April has a slightly lower maximum of 35°C (94°F). In terms of precipitation, October sees a bit more rainfall with 94 mm over 10 days compared to April's 89 mm over 9 days. Humidity levels are also similar, with October averaging 74% and April slightly higher at 76%. For more details, you can check San Marcos weather in April.
When comparing the weather in October and May, notable differences emerge. October experiences a broader temperature range, with minimums around 3°C (37°F) and maximums reaching up to 35°C (96°F). In contrast, May offers milder minimum temperatures starting at 10°C (51°F) and slightly higher maximums peaking at 36°C (98°F). Additionally, May tends to be wetter, with 149 mm (5.9 in) of precipitation over 14 days, compared to October’s 94 mm (3.7 in) spread over 10 days. Humidity is also slightly higher in May, averaging 81% against October’s 74%. For more detailed insights on May weather, you can visit San Marcos weather in May.
In comparing the weather of October and June, we see notable differences in temperature and humidity levels. October experiences a wider temperature range, with nighttime lows dropping to 3°C (37°F) and daytime highs peaking at 35°C (96°F), while June maintains a milder minimum of 17°C (63°F) and an average maximum of 37°C (100°F). Both months have similar levels of precipitation, with October receiving 94 mm (3.7 in) over approximately 10 days and June slightly higher at 102 mm (4.0 in) over 12 days. Humidity is also relatively consistent, hovering around 74% in October and 76% in June. For more detailed information on the weather during June, check out San Marcos weather in June.
When comparing the weather in October to that of July, significant differences emerge. October experiences a broader temperature range, with minimums dipping to 3°C (37°F) and maximums reaching 35°C (96°F), while the average temperature is a comfortable 21°C (70°F). In contrast, July is much warmer, boasting minimum temperatures of 17°C (63°F) and maximums soaring to 41°C (106°F), with an average of 29°C (84°F). In terms of precipitation, October sees slightly more rainfall at 94 mm (3.7 in) over about 10 days, whereas July has 79 mm (3.1 in) across 9 days. Additionally, October's humidity is higher at 74%, compared to July’s 66%. For a closer look at July weather specifics, check out San Marcos weather in July.
In comparing the weather of October and August, it is evident that October experiences a broader range of temperatures, with a minimum of 3°C (37°F) and an average of 21°C (70°F), while August maintains much warmer conditions, with a minimum of 20°C (68°F) and an average of 29°C (85°F). The maximum temperature in August can reach up to 40°C (104°F), significantly higher than October's peak of 35°C (96°F). Additionally, while October sees precipitation on about 10 days with a total of 94 mm (3.7 in), August has slightly more rainfall, accumulating 111 mm (4.4 in) over 7 days. Humidity levels are also higher in October at 74%, compared to a lower 58% in August. For more details, you can visit San Marcos weather in August.
In comparing the weather between September and October, we can observe a noticeable shift in temperatures and precipitation patterns. October brings cooler mornings with a minimum temperature of 3°C (37°F) and an average high of 21°C (70°F), whereas September features warmer nights, starting at a minimum of 11°C (53°F) and averaging a maximum of 38°C (100°F). Additionally, October experiences less rainfall, with a total precipitation of 94 mm (3.7 in) over 10 days compared to September's 112 mm (4.4 in) over 11 days. Moreover, October's humidity is higher at 74%, while September maintains a lower level at 65%. For more details on weather specifics in September, you can check San Marcos weather in September.
October experiences a wider temperature range, with minimums around 3°C (37°F) and maximums reaching as high as 35°C (96°F), showcasing the pleasant warmth of early fall. In contrast, November sees cooler temperatures, with minimums dropping to -3°C (26°F) and maximums averaging 30°C (86°F), reflecting the transition toward winter. Additionally, while October receives more precipitation (94 mm over 10 days), November sees significantly less, with only 49 mm of rain in about 6 days. The humidity also rises slightly in November to 81%, compared to October's 74%. For more insights on November weather, check out San Marcos weather in November.
In October, San Marcos experiences a warmer climate with temperatures ranging from a chilly 3°C (37°F) at night to a sweltering maximum of 35°C (96°F) during the day, averaging around 21°C (70°F). The month sees considerable rainfall, totaling 94 mm (3.7 in) over approximately 10 days, paired with a humidity level of 74%.
In contrast, December brings a notable drop in temperatures, with nighttime lows falling to -3°C (27°F) and daytime highs reaching a mild 29°C (84°F), averaging 13°C (55°F). The precipitation also decreases to 73 mm (2.9 in) over about 7 days, but the humidity rises to 86%, creating a more damp atmosphere. For more details, visit San Marcos weather in December.
As October settles in San Marcos, a distinct shift in weather becomes apparent. The temperatures, while still reaching pleasant highs, average a comfortable 21°C (70°F), making it a refreshing change from the peak summer heat. The month is marked by increased humidity and more frequent precipitation, with about 10 rainy days contributing to the overall 94 mm of rain. This combination creates a vibrant atmosphere, contrasting sharply with the drier, hotter preceding months. Visitors and residents alike can appreciate the cooler evenings and the lush landscape that follows the rains. For more detailed insights into how October fits within the broader seasonal patterns, check out San Marcos Climate.