September Weather in Granbury, United States

Last updated: February 24, 2025

In September, Granbury, Texas, experiences a remarkable blend of warm and cool temperatures, with maximum highs reaching 38°C (101°F) and average temperatures around 26°C (79°F). The month also showcases noticeable fluctuations in weather, with minimum temperatures dipping to 9°C (49°F). Rainfall is moderate, totaling 76 mm (3.0 in) over the course of 7 days, contributing to a humidity level of 64%. This dynamic weather captures the essence of early autumn in Granbury, making it a unique time for both residents and visitors.

September Temperature in Granbury

As summer fades into autumn, September in Granbury showcases a delightful transition in temperatures. With minimums settling around 9°C (49°F) and an inviting average of 26°C (79°F), the days feel pleasantly warm while the nights begin to cool off. The maximum temperature can reach up to 38°C (101°F), hinting at the lingering warmth from summer. This month not only marks the gradual drop from the sweltering highs of July and August but also allows for more comfortable outdoor activities as the intense heat gives way to milder days. The overall trend reflects a pleasing shift, making September an ideal time to savor the last remnants of warm weather before fall sets in.

September Weather in Granbury: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Granbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec474961667582868579685752
Data source: Temperature data for Granbury 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 Granbury

In September, Granbury experiences a moderate shift in precipitation patterns, receiving 76 mm (3.0 in) of rainfall over 7 days. This marks a notable decline from the heavy showers of May, which recorded the highest precipitation of the year at 127 mm (5.0 in), yet remains consistent with the summer months' totals, particularly in August. The relatively stable September rainfall helps sustain the vibrant, late-summer landscape, while the frequency of rainy days reflects a transition that anticipates the wetter conditions often seen in October. As the season shifts, this balance of moisture creates an invigorating backdrop for the community, preparing it for the more significant rainfall that typically arrives in the fall.

September Precipitation Trends in Granbury

The chart displays monthly precipitation patterns in Granbury, 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.
JanFebMarAprMayJunJulAugSepOctNovDec44798490127823884761214446
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Granbury

As the seasons transition in Granbury, September marks a notable dip in humidity, with levels falling to 64%, the lowest for the month in the year. This shift follows a steady decline from the summer months, where humidity peaked at 80% in May and June, then gradually decreased to 67% by August. The arrival of September signals a move towards drier conditions, setting the stage for a comfortable autumn ahead. Notably, as temperatures begin to cool, the humidity levels remain significantly lower than earlier in the summer, indicating a refreshing reprieve from the more oppressive heat and moisture experienced in previous months. This trend continues into October, where humidity slightly increases to 70%, but the air remains pleasantly breathable, further enhancing the allure of this time of year in Granbury.

September Average Humidity in Granbury

This chart illustrates the average monthly humidity levels in Granbury, 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.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%74%75%80%80%75%67%64%70%82%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Granbury

As summer fades into September, Granbury experiences a notable shift in UV levels, with the index hovering at 10, indicating very high exposure. This month marks a slight decrease from the extreme levels of 11 seen during the peak of summer, yet precautions are still essential to prevent skin damage, with a burn time of just 15 minutes. The consistent trend of elevated UV exposure from April through September underscores the importance of sun safety during these months. As the sun’s intensity gradually diminishes in October, the UV index drops to 8, but vigilance remains key. For more detailed information, you can check the Granbury UV Index.

Maximum UV Index Levels in Granbury for September

The chart shows the monthly maximum UV Index (UVI) for Granbury 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.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Granbury 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 Granbury

As September rolls into Granbury, the town enjoys abundant sunshine, with an impressive 282 hours of golden rays illuminating the landscape. This marks a slight decline from the summer peak in July, which boasted 361 hours, but still stands strong compared to earlier months. In fact, September's sunshine continues the trend of abundant light following the vibrant months of May and June, creating a perfect ambiance for outdoor activities as autumn approaches. The gradual decrease from the summer highs hints at the changing seasons, yet September remains a month where residents can bask in the warmth of the sun before cooler days set in.

Monthly Sunshine Duration in Granbury: September Highlighted

The September sunshine duration represents the total number of hours Granbury 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.
JanFebMarAprMayJunJulAugSepOctNovDec177h181h250h261h286h345h361h333h282h268h237h228h
Data source: Granbury September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Granbury During September

In Granbury, Texas, September shines brightly in the calendar as a month with the highest chance of sunny weather, boasting a 70% likelihood of sunshine. This trend highlights a significant increase from the summer months, where July and August post 53% and 61% chances respectively. As the sultry heat of summer recedes, September not only offers more favorable weather for outdoor activities but also signals a transition into a period of consistent sunshine. Following September, October maintains a close 69% chance, suggesting that the sunny days linger well into the fall, making this time of year especially appealing for enjoying the outdoors.

Percentage of Sunny Days in September in Granbury

The chart illustrates the percentage of sunny days in Granbury 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 Granbury experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec53%48%61%42%30%49%53%61%70%69%65%54%
Data source: Granbury September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Granbury in September

As summer draws to a close, September in Granbury, United States, offers a gentle transition with 12 hours of daylight. This marks a slight decline from the vibrant 14 hours enjoyed in the peak of July and August, signaling the approach of autumn. The steady decrease in daylight that begins in June reflects a broader seasonal trend where longer days gradually give way to shorter ones. While September still bathes Granbury in ample sunshine, it sets the stage for the cozy, shorter days ahead in October, with only 11 hours of daylight remaining. This rhythmic ebb and flow of daylight not only enhances the beauty of the changing seasons but also invites residents to embrace the crisp air and vibrant fall colors that are just around the corner.

Average Daylight Hours in Granbury for September

The chart illustrates the variation in daylight duration in Granbury throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 16m11h 1m12h12h 59m13h 49m14h 13m14h13h 16m12h 19m11h 19m10h 28m10h 2m
Data source: Granbury daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Granbury

As autumn begins to unfurl its colors, September in Granbury brings a gentle whisper of wind, with an average speed of 2.9 m/s (7 mph), marking a continuation of the seasonal decline in breeziness observed since July. Following the summer's peak winds—which, in June, reached 3.3 m/s (7 mph)—September's air feels tranquil as it transitions into the cooler months. Interestingly, the wind picks up slightly into October, with speeds returning to 4.0 m/s (9 mph), hinting at the invigorating gusts that will accompany fall's arrival. Overall, September's calm breezes create a serene backdrop for the early signs of autumn, creating an inviting atmosphere for both locals and visitors alike.

Average September Wind Speed in Granbury

The chart displays monthly wind speed patterns in Granbury, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.84.45.04.53.83.32.93.32.9 m/s4.03.84.0
Data source: Granbury September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Granbury Compares to Other Months

The weather in Granbury 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 Granbury and find detailed weather information for every month.

September and January present contrasting weather patterns. In September, temperatures fluctuate significantly, ranging from a cool 9°C (49°F) at night to a scorching 38°C (101°F) during the day, with an average of 26°C (79°F). This month also sees a fair amount of rainfall, totaling 76 mm (3.0 in) over about 7 days, along with a moderate humidity level of 64%. In contrast, January is characterized by much colder conditions, with temperatures dipping as low as -12°C (12°F) at night and reaching a maximum of 27°C (82°F) during the day. The average temperature sits at a chilly 8°C (47°F), with lower precipitation levels of 44 mm (1.7 in) occurring on around 6 days, although humidity rises to 77%. For a closer look at what to expect, check out Granbury weather in January.

September and February exhibit stark contrasts in weather patterns. In September, temperatures range from a pleasant minimum of 9°C (49°F) to an often scorching maximum of 38°C (101°F), with an average temperature of 26°C (79°F). Yearly rainfall is common, totaling 76 mm (3.0 in) over approximately 7 days, accompanied by a humidity level of 64%. In contrast, February presents a much colder climate, with minimum temperatures plunging to -18°C (-1°F) and a maximum of 32°C (90°F), resulting in a significantly lower average of 10°C (49°F). Precipitation remains fairly similar, totaling 79 mm (3.1 in) over about 7 days, yet with increased humidity at 76%. For more detailed information on February weather, you can check Granbury weather in February.

September and March exhibit distinct weather patterns that reflect the transition between summer and spring. In September, temperatures range from a minimum of 9°C (49°F) to a scorching maximum of 38°C (101°F), averaging around 26°C (79°F). The month experiences moderate precipitation of 76 mm (3.0 in) over 7 days, with humidity levels at 64%. Conversely, March sees cooler temperatures, with a minimum of -6°C (21°F) and a maximum of 35°C (95°F), averaging 16°C (61°F). While March has slightly higher precipitation at 84 mm (3.3 in) dispersed over 9 days, it also features increased humidity at 74%. For more information on March weather specifics, you can check Granbury weather in March.

When comparing the weather in September to that of April, notable differences emerge. September boasts warmer average temperatures, ranging from a minimum of 9°C (49°F) to a maximum of 38°C (101°F), with an average of 26°C (79°F). In contrast, April is cooler, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 35°C (96°F), and an average of 19°C (66°F). Both months experience significant precipitation—76 mm (3.0 in) in September over 7 days and slightly more, at 90 mm (3.5 in), in April over 8 days. Humidity levels also differ, with September at 64% and April higher at 75%. For more detailed information, you can check out Granbury weather in April.

In comparing the weather between September and May, we see some notable differences. September generally experiences warmer temperatures, with an average high of 26°C (79°F) and peaks reaching up to 38°C (101°F), while May has slightly cooler averages, reaching a maximum of 37°C (98°F). However, May tends to be wetter, receiving 127 mm (5.0 in) of precipitation over about 11 days, compared to September's 76 mm (3.0 in) over 7 days. Additionally, humidity levels are higher in May at 80%, compared to September's 64%. For a closer look at the specifics, you can check Granbury weather in May.

When comparing the weather in September and June, we see notable differences in temperature and humidity. September typically enjoys a wider temperature range with a minimum of 9°C (49°F) and an average of 26°C (79°F), reaching a maximum of 38°C (101°F). In contrast, June starts warmer with a minimum of 15°C (59°F) and an average temperature of 28°C (82°F), peaking at 39°C (103°F). Rainfall is fairly similar, with September experiencing 76 mm (3.0 in) over 7 days, while June has slightly more precipitation at 82 mm (3.2 in) across 8 days. June also tends to be more humid, with levels at 80%, compared to 64% humidity in September. For more detailed insights, you can check Granbury weather in June.

When comparing the weather in September and July, notable differences emerge. September experiences lower minimum temperatures, ranging from 9°C (49°F) at night to an average of 26°C (79°F) during the day, while July boasts higher minimums, beginning at 18°C (65°F) and averaging 30°C (86°F). Additionally, July can reach maximum temperatures of 43°C (109°F), significantly higher than September's peak of 38°C (101°F). Despite July having less precipitation at 38 mm (1.5 in) over 7 days compared to September's 76 mm (3.0 in) also over 7 days, it has a higher humidity level of 75% compared to September's 64%. For a closer look at July's circumstances, you can refer to Granbury weather in July.

In comparing the weather between August and September, it is evident that September experiences a more significant drop in temperatures, with minimums reaching as low as 9°C (49°F) compared to August's warmer lows of 19°C (67°F). The average temperature in September is slightly lower at 26°C (79°F), while August holds a warmer average of 29°C (85°F). However, both months see high maximum temperatures, with August peaking at 41°C (106°F) and September at 38°C (101°F). Precipitation levels are also quite similar, with September receiving 76 mm (3.0 in) and August totaling 84 mm (3.3 in), both occurring over 7 days. Humidity remains comparable, slightly higher in August at 67% versus September's 64%. For more detailed August weather conditions, visit Granbury weather in August.

September experienced warmer temperatures with an average of 26°C (79°F) and maximum highs reaching up to 38°C (101°F), while October sees a notable drop in the minimum temperature to 1°C (34°F) and an average of 20°C (68°F). Precipitation in October is significantly higher at 121 mm (4.8 in) compared to September's 76 mm (3.0 in), although both months have about seven days of rainfall. Humidity also slightly increases from 64% in September to 70% in October, contributing to the different weather sensations experienced in these months. For more details on October weather, you can visit Granbury weather in October.

September and November present notable contrasts in weather conditions. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 38°C (101°F), with an average of 26°C (79°F). This month experiences more rainfall, totaling 76 mm (3.0 in), over about 7 days, accompanied by a moderate humidity of 64%. In contrast, November sees much cooler temperatures, with a minimum of -5°C (23°F), an average of 14°C (57°F), and a maximum of 33°C (92°F). Precipitation decreases to 44 mm (1.7 in) over 5 days, while humidity rises to 82%. For a more detailed look at weather specifics for this month, check Granbury weather in November.

In September, the weather is typically warm, with temperatures ranging from a comfortable 9°C (49°F) at night to a scorching 38°C (101°F) during the day, averaging around 26°C (79°F). The month experiences about 76 mm (3.0 in) of rain over 7 days, coupled with moderate humidity levels of 64%.

Conversely, December brings a dramatic shift in temperature, with nighttime lows plummeting to -5°C (23°F) and daytime highs reaching up to 30°C (86°F), averaging only 11°C (52°F). Rainfall decreases significantly to 46 mm (1.8 in) over just 4 days, but the humidity rises to 85%, creating a crisp atmosphere. For more details on December weather, check out Granbury weather in December.

Compare Granbury's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Granbury

September in Granbury brings a transition from the scorching summer heat, with temperatures averaging a comfortable 26°C (79°F), while still allowing for the occasional peaks of 38°C (101°F). This month introduces a bit more variability, as warmer days give way to cooler nights, dropping to refreshing lows of 9°C (49°F). The increase in humidity at 64% adds a layer of moisture to the air, making it feel more vibrant. With 76 mm (3.0 in) of rain spread over 7 days, September often feels more dynamic than the dry summer months, creating a lively atmosphere that welcomes the impending fall. For a deeper dive into the weather patterns of Granbury, visit Granbury Climate.