September Weather in New Braunfels, United States

Last updated: February 24, 2025

September in New Braunfels, United States, showcases a dynamic blend of warm temperatures and moderate rainfall. With daytime highs reaching up to 38°C (100°F) and an average temperature of 27°C (80°F), the month is notably warm, though evenings can cool down to a refreshing 12°C (53°F). Rainfall is common, with 109 mm (4.3 in) accumulated over 12 days, contributing to a relatively humid environment at 65%. This combination of warmth and moisture makes September a unique time to experience the vibrant outdoors in this charming Texas city.

September Temperature in New Braunfels

In September, New Braunfels experiences a delightful transition, with temperatures remaining warm yet starting to show signs of a cool-down from the summer heat. The minimum temperature averages around 12°C (53°F), offering a refreshing start to the day, while the average temperature settles at a comfortable 27°C (80°F). The maximum temperatures can still reach up to 38°C (100°F), reminiscent of the peak summer months, yet the overall feel hints at the impending fall. This month serves as a bridge, blending the lingering warmth of summer with the promise of cooler days ahead, making it an ideal time for outdoor activities and enjoying the scenic beauty of the area.

September Weather in New Braunfels: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in New Braunfels, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec525464697782858680716155
Data source: Temperature data for New Braunfels 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.

September Precipitation in New Braunfels

In September, New Braunfels experiences a notable shift in weather, with precipitation totaling 109 mm (4.3 in) across about 12 rainy days. This marks a peak in rainfall for the month, reflecting an upward trend as summer transitions into autumn. August’s precipitation of 96 mm (3.8 in) laid the groundwork, but September’s increase signifies a seasonal change, bringing much-needed moisture to the region. The consistent rainfall patterns from previous months, especially the higher totals recorded in late spring and summer, set the stage for September's robust downpours, reinforcing the area's reliance on this period for rejuvenating its landscapes and reservoirs.

September Precipitation Trends in New Braunfels

The chart displays monthly precipitation patterns in New Braunfels, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec47576192136957896109855167
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in New Braunfels

In September, New Braunfels experiences a notable shift in humidity, with levels reaching 65%. This figure marks a decrease from the hotter summer months, where July and August recorded much lower humidity at 66% and 58%, respectively. The transition into fall brings a gentle increase in moisture, as humidity levels begin to climb again towards October's 74%. Notably, the trend reflects a post-summer recovery, as the humidity seen in September acts as a precursor to the wetter months ahead, with November and December soaring to 81% and 86%. This gradual fluctuation throughout the year highlights the region's distinct seasonal patterns, offering a refreshing balance between heat and humidity as summer gives way to autumn.

September Average Humidity in New Braunfels

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

September UV Index in New Braunfels

In September, New Braunfels experiences a UV Index of 11, placing it in the extreme exposure category and resulting in a burn time of just 10 minutes. This indicates a continuation of the high UV levels seen throughout the summer months, particularly from June to August when the Index peaked at 12. As the season transitions into fall, there is a slight decrease in UV intensity, but caution remains essential for outdoor activities. With such high exposure in September, it's crucial to protect your skin to prevent sunburn. For more detailed information, check out the New Braunfels UV Index.

Maximum UV Index Levels in New Braunfels for September

The chart shows the monthly maximum UV Index (UVI) for New Braunfels in September, 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.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121211975
Data source: New Braunfels September 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.

September Sunshine in New Braunfels

As summer gracefully transitions into fall, September in New Braunfels continues to bask in an impressive 277 hours of sunshine. While this marks a slight decline from the peak summer months of June and July, known for their abundant rays with 325 and 343 hours respectively, the vibrant sun exposure of September still creates a warm and inviting atmosphere. Following the sun-drenched days of August, with 330 hours of light, September maintains a significant level of brightness that encourages outdoor activities and festivities. As the year progresses into the cooler months of October, which offers 268 hours, the patterns indicate that the idyllic Texan sun doesn't shy away too easily, providing a delightful backdrop for all who revel in the charm of New Braunfels.

Monthly Sunshine Duration in New Braunfels: September Highlighted

The September sunshine duration represents the total number of hours New Braunfels experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec169h160h228h256h281h325h343h330h277h268h229h221h
Data source: New Braunfels September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in New Braunfels During September

September in New Braunfels offers a notable shift in weather patterns, showcasing a 59% chance of sunny days. This figure stands out as one of the highest percentages for the year, rivaling January's sunshine likelihood. As we transition from the sweltering summer months, where the chance of sun dips to around 31-36%, September invites residents and visitors alike to enjoy a more promising and bright atmosphere. Unlike the earlier months in spring, which hover around the 40% range, September paves the way for a more glorious autumn, making it an ideal time for outdoor activities and soaking up the sun’s rays in this charming Texan city.

Percentage of Sunny Days in September in New Braunfels

The chart illustrates the percentage of sunny days in New Braunfels throughout the year, with September 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 New Braunfels experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec58%44%49%41%30%42%31%36%59%51%55%37%
Data source: New Braunfels September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in New Braunfels in September

As summer transitions into fall, September in New Braunfels witnesses a gentle decline in daylight, offering approximately 12 hours of sunlight each day. This marks a shift from the sun-drenched days of June, which boast a peak of 14 hours. In the months leading up to September, there is a steady increase in daylight, reaching its zenith before the gradual descent begins. Interestingly, the daylight duration remains stable through August but begins to reflect the approaching autumn in September, mirroring the patterns observed in earlier months like April and March. As the year progresses, the daylight duration slowly tapers off to 11 hours in October, setting the stage for the cozy, shorter days of winter.

Average Daylight Hours in New Braunfels for September

The chart illustrates the variation in daylight duration in New Braunfels throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 28m11h 8m12h12h 54m13h 38m14h13h 48m13h 8m12h 17m11h 24m10h 38m10h 15m
Data source: New Braunfels daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in New Braunfels

As September arrives in New Braunfels, the gentle breeze characterizing the month mirrors the calming transition towards fall. With an average wind speed of 2.7 m/s (6 mph), the winds are notably lighter than the spring and early summer months, which see speeds ranging from 3.5 to 4.1 m/s. This consistent decrease from the gentler gusts of previous months marks a shift toward a more serene atmosphere, inviting residents and visitors alike to enjoy the lingering warmth of summer while basking in the soft caress of autumn air. As the year progresses, the winds will gradually pick up pace again, but September stands out as a serene lull, perfect for leisurely outdoor activities.

Average September Wind Speed in New Braunfels

The chart displays monthly wind speed patterns in New Braunfels, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.54.04.14.13.73.02.52.72.7 m/s3.13.23.4
Data source: New Braunfels September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in New Braunfels Compares to Other Months

The weather in New Braunfels changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in New Braunfels and find detailed weather information for every month.

September and January showcase contrasting weather patterns. In September, temperatures range from a cool 12°C (53°F) to a sweltering 38°C (100°F), with an average temperature of 27°C (80°F). This month experiences around 109 mm (4.3 in) of precipitation over 12 days, and humidity levels sit at 65%. In stark contrast, January features a much cooler climate, with temperatures that drop as low as -7°C (20°F) and an average of 11°C (53°F), reaching a maximum of 28°C (82°F). The winter month brings significantly less rainfall at 46 mm (1.8 in) over just 6 days, and humidity is higher at 79%. For a closer look at the January climate, visit New Braunfels weather in January.

September and February present contrasting weather patterns. In September, temperatures can soar to a maximum of 38°C (100°F), with an average of 27°C (80°F), creating a warm and humid atmosphere, evident with 65% humidity and significant rainfall totaling 109 mm (4.3 in) over 12 days. In contrast, February brings much cooler temperatures, with lows dropping to -14°C (7°F) and an average of 12°C (54°F). Although February experiences less precipitation at 57 mm (2.2 in) over 10 days, the humidity is higher at 79%, contributing to a chilly yet damp climate. For more details, you might want to check out New Braunfels weather in February.

The weather in September presents a warm and humid atmosphere, with average temperatures soaring to 27°C (80°F) and a maximum reaching up to 38°C (100°F). However, it also experiences significant precipitation, totaling 109 mm (4.3 inches) over about 12 days. In contrast, March offers a cooler climate, with temperatures ranging from a minimum of -3°C (28°F) to an average of 18°C (65°F) and a maximum of 33°C (91°F). Although it has less precipitation at 61 mm (2.4 inches) over 10 days, March also has a higher humidity level of 74%. For a more detailed look at March weather, visit New Braunfels weather in March.

When comparing the weather in September and April, we notice distinct differences. September typically experiences warmer temperatures, with average highs reaching up to 38°C (100°F) and lows around 12°C (53°F), whereas April's temperatures are milder, averaging a maximum of 35°C (95°F) and a minimum of 3°C (37°F). Precipitation is more frequent in September, with about 109 mm (4.3 in) falling over 12 days, compared to April's 92 mm (3.6 in) over 8 days. Additionally, April tends to have higher humidity levels, averaging 76%, compared to September's 65%. For a detailed look at April weather, you can visit New Braunfels weather in April.

When comparing the weather in September and May, September tends to be warmer, with average temperatures reaching 27°C (80°F) compared to May's average of 25°C (77°F). However, May has slightly higher humidity at 81%, contributing to a more muggy feel, while September's humidity rests at 65%. Precipitation is also notable, with May experiencing a bit more rain, recorded at 136 mm (5.4 in) over 13 days, compared to September's 109 mm (4.3 in) over 12 days. For a deeper dive into the specific climate details, check out New Braunfels weather in May.

In comparing the weather between September and June, both months reach a maximum temperature of 38°C (100°F), yet September experiences a wider range with a minimum temperature of 12°C (53°F) compared to June's warmer minimum of 18°C (64°F). The average temperatures are fairly similar, with September averaging 27°C (80°F) and June slightly warmer at 28°C (82°F). Precipitation is more frequent in September, with 109 mm (4.3 in) over 12 days, whereas June sees slightly less rainfall at 95 mm (3.7 in) also over 12 days. Additionally, humidity levels are higher in June at 76% compared to September's 65%, making June feel more muggy despite the similar high temperatures. For more detailed insights, visit New Braunfels weather in June.

In comparing the weather between September and July, it’s clear that July typically experiences warmer temperatures, with an average of 29°C (85°F) compared to September's average of 27°C (80°F). The maximum temperatures also reflect this trend, reaching up to 41°C (107°F) in July, while September peaks at a slightly lower 38°C (100°F). Additionally, July has lower precipitation, totaling 78 mm (3.1 in) over 8 days, whereas September sees more rain at 109 mm (4.3 in) across 12 days. Humidity levels remain fairly similar, with July at 66% and September at 65%. For more details on July weather patterns, visit New Braunfels weather in July.

In comparing the weather between September and August, September exhibits a wider temperature range with minimums dropping to 12°C (53°F) and maximums reaching up to 38°C (100°F), while August remains consistently warmer with minimum temperatures around 20°C (69°F) and maximums peaking at 40°C (104°F). Precipitation is more frequent in September, occurring over 12 days and totaling 109 mm (4.3 in), compared to only 7 days with 96 mm (3.8 in) in August. Additionally, September has a higher humidity level at 65%, which contrasts with the more comfortable 58% humidity seen in August. For a closer look at August's weather, you can check out New Braunfels weather in August.

September and October present a notable transition in weather patterns. In September, temperatures can reach as high as 38°C (100°F), with an average of 27°C (80°F), while October sees cooler conditions, with a maximum of 35°C (96°F) and an average of 22°C (71°F). The minimum temperature in October drops significantly to 3°C (37°F), contrasting with the milder 12°C (53°F) in September. Additionally, September experiences more precipitation at 109 mm (4.3 in) over 12 days compared to October's 85 mm (3.4 in) over 10 days, making October slightly drier despite its higher humidity level of 74%. For a detailed overview of the climate, check out New Braunfels weather in October.

In September, the weather is typically much warmer, with average temperatures around 27°C (80°F) and maximums soaring up to 38°C (100°F). The month experiences significant humidity at 65% along with 109 mm (4.3 in) of precipitation spread over 12 days. In contrast, November brings a cooler climate, where average temperatures drop to 16°C (61°F) with a minimum of -3°C (26°F). The amount of precipitation also decreases to 51 mm (2.0 in) over just 6 days, and the humidity rises slightly to 81%. For more detailed information, check out New Braunfels weather in November.

In September, temperatures soar with a minimum of 12°C (53°F) and an average high of 27°C (80°F), reaching up to 38°C (100°F) on the warmest days. This month also sees considerable rainfall, with 109 mm (4.3 in) of precipitation over approximately 12 days, while humidity levels remain around 65%. In contrast, December brings much cooler conditions, with a minimum temperature dropping to -4°C (25°F) and an average of 13°C (56°F), peaking at 29°C (84°F). Precipitation is less frequent, totaling 67 mm (2.6 in) over just 7 days, accompanied by higher humidity at 86%. For more details on the weather specifics, visit New Braunfels weather in December.

Compare New Braunfels's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in New Braunfels

As September rolls into New Braunfels, the weather begins to transition, offering a blend of summer warmth and the anticipation of fall. The average temperatures are noticeably milder than the peak summer months, providing a comfortable escape from the intense summer heat, while still allowing for some hotter days. This month is also marked by an increase in precipitation, with more frequent rain showers that keep the landscape lush and vibrant. The humidity remains steady, contributing to that characteristic Texas warmth, but with cooler evenings that invite outdoor activities. Overall, September presents a unique climate experience—one that is ideal for enjoying the area's natural beauty. For a more detailed look at what to expect throughout the year, check out the New Braunfels Climate.