June Weather in San Marcos, United States

Last updated: February 24, 2025

June in San Marcos, United States, boasts a vibrant climate, where temperatures can peak at an impressive 37°C (100°F), averaging a comfortable 27°C (82°F) throughout the month. While evenings offer a pleasant respite with lows around 17°C (63°F), expect to experience a fair amount of moisture, with 102 mm (4.0 in) of rain scattered over 12 days. This blend of warmth and 76% humidity creates a lush atmosphere, making June an ideal time for outdoor adventures despite the occasional shower. Enjoy the dynamic weather while embracing the beauty of this vibrant Texan locale!

June Temperature in San Marcos

In June, San Marcos experiences a noticeable warmth as the city transitions into summer. With minimum temperatures hovering around 17°C (63°F) and an inviting average of 27°C (82°F), residents begin to enjoy the outdoor activities that the longer days afford. The peaks reach a sizzling 37°C (100°F), marking it as one of the hottest months of the year. Compared to the cooler spring months, June’s temperatures present a distinct upward trend, inviting locals and visitors alike to relish in the vibrant atmosphere. As the heat intensifies, refreshing options like nearby rivers and parks become increasingly popular for those looking to cool off under the bright Texas sun.

June Weather in San Marcos: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in San Marcos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec525363687681848579706055
Data source: Temperature data for San Marcos generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

June Precipitation in San Marcos

In June, San Marcos experiences a notable shift in precipitation, with 102 mm (4.0 in) of rain recorded over 12 days. This marks a slight decrease from the preceding month of May, which saw the highest rainfall of the year at 149 mm (5.9 in) over 14 days. As the summer progresses, precipitation tends to taper off slightly, making June a pivotal month in transitioning from the substantial spring rains to the drier conditions typical of the latter summer months. Despite this reduction, June's moisture continues to support the region's lush landscapes, ensuring a vibrant and thriving environment leading into the warmer summer weeks ahead.

June Precipitation Trends in San Marcos

The chart displays monthly precipitation patterns in San Marcos, with values for each month alongside June's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec4860678914910280111112944973
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in San Marcos

In June, San Marcos experiences a mild humidity level of 76%, slightly lower than the preceding month of May, which boasts a more humid 81%. This gradual decline marks the transition into the drier summer months, as humidity continues to decrease through July and August, reaching a comfortable 66% and 58%, respectively. Notably, June's humidity remains higher than the lower summer average, but it sets the stage for the next months, establishing a consistent trend of diminishing moisture that characterizes the region's climate. As the year progresses, humidity levels will rise again in the fall, creating a cyclic pattern that defines San Marcos' unique weather rhythm.

June Average Humidity in San Marcos

This chart illustrates the average monthly humidity levels in San Marcos, with June's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how June's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec79%79%74%76%81%76%66%58%65%74%81%86%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in San Marcos

In June, San Marcos experiences its peak UV Index, soaring to 12, which falls into the extreme exposure category. This means sunbathers should be particularly cautious, with a recommended burn time of just 10 minutes. Following a trend from April to June, the city consistently faces high UV levels, reflecting a general climate of increased sun intensity as summer approaches. As temperatures rise and outdoor activities become a staple of the season, residents and visitors alike should remain vigilant about sun protection to avoid the harmful effects of overexposure. For detailed information and daily updates, check the San Marcos UV Index.

Maximum UV Index Levels in San Marcos for June

The chart shows the monthly maximum UV Index (UVI) for San Marcos in June, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121211965
Data source: San Marcos June UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

June Sunshine in San Marcos

June shines brightly in San Marcos, boasting an impressive 329 hours of sunshine that kickstarts the summer season. This month marks a noticeable peak in sunlight, following a steady climb from 170 hours in January to 282 hours in May. As the days grow longer and the temperatures rise, sunshine not only enhances the beauty of the region but also invites residents and visitors to embrace outdoor activities. The summer months continue to deliver abundant light, with July leading the way at 348 hours, creating a perfect backdrop for evenings spent under the stars. Overall, June serves as a vibrant highlight in San Marcos, reflecting a warm transition from spring to summer, where sunshine becomes a cherished companion.

Monthly Sunshine Duration in San Marcos: June Highlighted

The June sunshine duration represents the total number of hours San Marcos experiences direct sunlight during the month of June, excluding cloudy or obstructed periods. This chart compares the sunshine duration of June with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec170h165h229h260h282h329h348h329h277h270h230h223h
Data source: San Marcos June Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Marcos During June

In June, the likelihood of sunny weather in San Marcos stands at 42%, reflecting a modest shift from the sunnier months at the beginning of the year. As we transition from the lively spring months—where April shows a promising 41% chance of sunshine—into the slightly cloudier summer, June presents a subtle dip. This pattern continues into July and August, where the probability decreases even further to 31% and 37%, respectively. Interestingly, the summer months follow a downward trend, contrasting sharply with the bright possibilities seen in September, which soars back to 59%. Thus, while June may not boast the sunniest disposition, it still holds a respectable chance of clear skies, slowly paving the way for sunnier days later in the year.

Percentage of Sunny Days in June in San Marcos

The chart illustrates the percentage of sunny days in San Marcos throughout the year, with June highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often San Marcos experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec58%44%50%41%29%42%31%37%59%52%57%37%
Data source: San Marcos June chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Marcos in June

As June arrives in San Marcos, the days bask in the warmth of 14 hours of daylight, marking the peak of the year. This trend reflects a steady increase over the previous months, as daylight gradually lengthened from just 10 hours in January. Following June, the daylight begins to taper off slightly in July and August, settling back to 13 hours. The pattern of this yearly cycle highlights a vibrant transition from the shorter, darker days of winter to the brighter and longer days of summer, inviting residents and visitors alike to enjoy the outdoor beauty that this season brings.

Average Daylight Hours in San Marcos for June

The chart illustrates the variation in daylight duration in San Marcos throughout the year, with June highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 26m11h 7m12h12h 54m13h 40m14h 2m13h 50m13h 9m12h 17m11h 23m10h 37m10h 13m
Data source: San Marcos daylight hours, calculated by summing the hours between sunrise and sunset for each day.

June Winds in San Marcos

In June, San Marcos experiences a gentle breeze predominating with an average wind speed of 2.9 m/s (6 mph), continuing the downward trend that begins in late spring. This month marks the onset of the calm summer winds, as speeds dip from the higher averages of earlier months like March (4.1 m/s) and April (3.9 m/s). The transition into summer brings a more relaxed atmosphere, evidenced by the consistently lower wind speeds into July and August, where they stabilize around 2.5 to 2.7 m/s (6 mph). This seasonal shift signifies not only a change in climate but also sets the stage for warm, sunny days ahead, inviting residents and visitors alike to enjoy the tranquil outdoor experiences that June offers in this charming Texas town.

Average June Wind Speed in San Marcos

The chart displays monthly wind speed patterns in San Marcos, with values for each month shown alongside June's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how June's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.43.94.13.93.62.9 m/s2.52.72.53.13.23.4
Data source: San Marcos June wind data, generated using information from the Copernicus Climate Change Service.

How June Weather in San Marcos Compares to Other Months

The weather in San Marcos changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of June'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 comparing the weather between June and January, a striking contrast emerges. June is characterized by much warmer temperatures, with a minimum of 17°C (63°F) and an average high reaching up to 37°C (100°F). In addition, this month experiences higher humidity at 76% and more precipitation, totaling 102 mm (4.0 in) over approximately 12 days. Conversely, January brings cooler conditions, with temperatures ranging from a minimum of -7°C (19°F) to a maximum of 26°C (80°F), and a significantly lower average of 11°C (52°F). Precipitation is also less frequent, totaling only 48 mm (1.9 in) across just 6 days, while humidity slightly increases to 79%. For more details, you can explore San Marcos weather in January.

June and February offer stark contrasts in weather patterns. In June, temperatures range significantly, with lows of 17°C (63°F) and scorching highs reaching up to 37°C (100°F), accompanied by substantial humidity at 76%. During this month, rainfall is common, averaging 102 mm (4.0 in) over about 12 days. In contrast, February presents much cooler conditions, featuring a minimum temperature of -15°C (6°F) and a comfortable average of 12°C (54°F). The maximum temperature can rise to 31°C (87°F), but overall, the month experiences less precipitation at 60 mm (2.4 in) over 10 days, alongside slightly higher humidity at 79%. For more detailed information on February weather, you can refer to San Marcos weather in February.

June and March exhibit stark contrasts in weather patterns. June boasts much warmer temperatures, with averages around 27°C (82°F) and maximums reaching up to 37°C (100°F), while March experiences cooler averages of 17°C (64°F) and maximums of 33°C (91°F). Additionally, June has higher precipitation at 102 mm (4.0 in) over 12 days, compared to March's 67 mm (2.6 in) over 11 days. Despite the higher humidity levels in June at 76%, March's humidity is only slightly lower at 74%. For a closer look at San Marcos weather in March, check here: San Marcos weather in March.

When comparing the weather in June and April, it’s clear that June is significantly warmer, with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 37°C (100°F), whereas April has more moderate temperatures, with a minimum of 3°C (38°F) and a maximum of 35°C (94°F). Additionally, June experiences more precipitation, totaling 102 mm (4.0 in) over 12 days, compared to April’s 89 mm (3.5 in) across 9 days. Both months share the same humidity level of 76%, but the higher temperatures in June create a much more sweltering atmosphere. For more details on April weather, you can visit San Marcos weather in April.

In comparing the weather of June and May, June typically experiences warmer temperatures, with an average of 27°C (82°F) and a maximum reaching 37°C (100°F), while May averages a cooler 25°C (76°F) and peaks at 36°C (98°F). However, May is wetter, accumulating 149 mm (5.9 in) of precipitation over 14 days compared to June's 102 mm (4.0 in) over 12 days. Humidity levels are slightly lower in June at 76%, compared to May's 81%. For more detailed information, you can check San Marcos weather in May.

June and July exhibit notable differences in weather patterns. In June, temperatures range from a minimum of 17°C (63°F) to a maximum of 37°C (100°F), with an average of 27°C (82°F) and a higher humidity level of 76%. This month also experiences 102 mm (4.0 in) of precipitation over 12 days, making it relatively wetter. Conversely, July sees an increase in average temperature to 29°C (84°F), with maximums reaching up to 41°C (106°F), while maintaining the same minimum temperature of 17°C (63°F). The humidity decreases to 66%, and precipitation drops to 79 mm (3.1 in) over just 9 days. For more details on specifics, you can check San Marcos weather in July.

When comparing the weather in June and August, June tends to be slightly cooler with an average temperature of 27°C (82°F) and a maximum of 37°C (100°F). It also experiences higher humidity at 76% and about 102 mm (4.0 in) of precipitation over 12 days. In contrast, August sees warmer temperatures, with an average of 29°C (85°F) and highs reaching up to 40°C (104°F). The humidity drops to 58%, and precipitation is slightly higher at 111 mm (4.4 in) but over just 7 days. For more detailed insights, you can check San Marcos weather in August.

June and September both experience warm temperatures, but they differ in several key aspects. In June, the minimum temperature is higher at 17°C (63°F) compared to September's 11°C (53°F), while the average temperature in June is slightly warmer at 27°C (82°F) versus September's 26°C (79°F). Both months can reach high temperatures of up to 37°C (100°F) and 38°C (100°F), respectively, showcasing their potential for heat. Precipitation is slightly higher in September, with 112 mm (4.4 in) compared to June's 102 mm (4.0 in), and while June experiences more humid conditions at 76%, September’s humidity is lower at 65%. For a closer look at September weather specifics, you can visit San Marcos weather in September.

June and October present contrasting weather patterns. June is characterized by warmer temperatures, with minimums around 17°C (63°F) and maximums reaching up to 37°C (100°F), resulting in an average of 27°C (82°F). The month also experiences significant humidity at 76% and higher precipitation levels, totaling 102 mm (4.0 in) over approximately 12 days. In contrast, October sees much cooler temperatures, with a minimum of 3°C (37°F) and a comfortable average of 21°C (70°F), peaking at 35°C (96°F). Precipitation slightly decreases to 94 mm (3.7 in) over around 10 days, and humidity remains relatively low at 74%. For more specific details on October weather conditions, check out San Marcos weather in October.

June and November present strikingly different weather patterns. In June, temperatures soar, with daily averages around 27°C (82°F) and maximums reaching up to 37°C (100°F), creating a hot and humid atmosphere with a humidity level of 76%. This month also experiences more rainfall, averaging 102 mm (4.0 in) over approximately 12 days. In contrast, November brings a cooler climate, with average temperatures around 15°C (60°F) and a maximum of 30°C (86°F). The month is characterized by significantly less precipitation, totaling 49 mm (1.9 in) over just 6 days, and slightly higher humidity at 81%. For more details on the November weather specifics, you can check San Marcos weather in November.

June and December present stark contrasts in weather conditions. In June, temperatures soar with a minimum of 17°C (63°F) and an average high of 37°C (100°F), accompanied by significant humidity at 76%. This month typically experiences 102 mm (4.0 in) of precipitation over about 12 days, making it a lush yet hot time of year. Conversely, December sees much cooler temperatures, ranging from a minimum of -3°C (27°F) to a maximum of 29°C (84°F), with an average temperature of 13°C (55°F). Precipitation decreases to 73 mm (2.9 in) over roughly 7 days, and humidity rises slightly to 86%, creating a crisp atmosphere. For a detailed look at December weather patterns, you can visit San Marcos weather in December.

Compare San Marcos's Climate with Cities Worldwide

Conclusion: What to Expect From June Weather in San Marcos

As June settles in San Marcos, the warm embrace of summer becomes unmistakable. Temperatures soar, bringing a vibrant edge to daily life that sets it apart from the milder months of spring. Unlike the cooler spring days, June showcases a dynamic blend of heat and humidity, with more frequent showers that can provide a refreshing contrast to the sun-soaked afternoons. This month typically experiences a noticeable uptick in precipitation, marking a shift from the dryer earlier months. For those looking to explore the unique aspects of June's climate and how it shapes the local environment, delve deeper into the details at San Marcos Climate.