September Weather in Saint Augustine South, United States

Last updated: February 24, 2025

In Saint Augustine South, September offers a warm and humid climate, with maximum temperatures reaching 33°C (92°F) and an average of 27°C (81°F). Despite the pleasant warmth, residents and visitors should be prepared for potential rain, as the area experiences 162 mm (6.4 in) of precipitation over 19 days during the month. The high humidity level of 83% can make conditions feel even warmer, setting the stage for a quintessential late summer experience in this charming coastal region.

September Temperature in Saint Augustine South

In Saint Augustine South, September marks the transition from summer warmth to the cooler autumn air, yet it still boasts pleasant temperatures. With a minimum of 20°C (68°F) and an average of 27°C (81°F), the early days of fall remain comfortably warm, perfect for enjoying outdoor activities. The high temperatures can reach up to 33°C (92°F), maintaining the feel of summer before dipping into more moderate conditions in October. This month tends to be one of the last opportunities for sun-kissed days, as the gradual decline in temperatures signals the approach of fall. Overall, September in Saint Augustine South offers a delightful blend of warmth and the anticipation of seasonal change.

September Weather in Saint Augustine South: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint Augustine South, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec596365707680818281776863
Data source: Temperature data for Saint Augustine South 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 Saint Augustine South

In September, Saint Augustine South experiences a notable increase in precipitation, totaling 162 mm (6.4 in) across 19 days of rain. This month marks a peak in the wet season, following a summer characterized by heavy downpours in July and August. The rainfall in September not only outpaces the previous months but also showcases a significant rise from the 143 mm seen in June. While the frequency of rainy days decreases compared to the summer's peak, the amount of rainfall remains high, suggesting that when it rains, it tends to pour. As the transition into autumn unfolds, September stands out as a climactic end to the season's hydrous festivities, paving the way for cooler and drier months ahead.

September Precipitation Trends in Saint Augustine South

The chart displays monthly precipitation patterns in Saint Augustine South, 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.
JanFebMarAprMayJunJulAugSepOctNovDec47613482771431611461631239270
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint Augustine South

In September, Saint Augustine South experiences a notable humidity level of 83%, marking a return to the higher figures seen earlier in the year. As summer transitions into fall, the humidity fluctuates, starting at 83% in January, dipping to its lowest at 68% in May, and then gradually rising again. This month stands out for mirroring the January and November humidity levels, suggesting a trend of increased moisture as the year begins to close. While the peak summer months of July and August also brought higher humidity, September's dampness signals a persistent warmth in the air, keeping the seaside atmosphere characteristically rich and inviting.

September Average Humidity in Saint Augustine South

This chart illustrates the average monthly humidity levels in Saint Augustine South, 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.
JanFebMarAprMayJunJulAugSepOctNovDec83%80%75%70%68%75%80%81%83%81%82%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint Augustine South

September in Saint Augustine South sees a UV Index of 11, categorizing it as extreme and demanding keen attention to sun safety. With a burn time of just 10 minutes, it's crucial for residents and visitors to protect their skin during this month as the UV levels remain high, consistent with the previous summer months. This trend of elevated UV exposure is typical for the region from April through September, emphasizing the need for proper sun protection strategies. As the days transition to October, the UV Index begins to decrease, but September definitely stands out as a pivotal time for sun awareness. For more detailed information on UV exposure throughout the year, check out Saint Augustine South UV Index.

Maximum UV Index Levels in Saint Augustine South for September

The chart shows the monthly maximum UV Index (UVI) for Saint Augustine South 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.
JanFebMarAprMayJunJulAugSepOctNovDec589111112111111975
Data source: Saint Augustine South 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 Saint Augustine South

In September, Saint Augustine enjoys a delightful blend of warm weather and abundant sunshine, basking in an impressive 301 hours of sunlight. This month marks a slight dip from the peak of 334 hours in July, yet it maintains a robust glow as the city transitions into fall. Over the summer, the sun has generously poured down its rays, with July and August leading the way, while the decreasing trend in October and November hints at the upcoming cooler months. Even so, September continues to envelop the charming streets and historic sites of Saint Augustine in a warm embrace, making it a fantastic time to explore the city before the days grow shorter.

Monthly Sunshine Duration in Saint Augustine South: September Highlighted

The September sunshine duration represents the total number of hours Saint Augustine South 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.
JanFebMarAprMayJunJulAugSepOctNovDec205h237h302h303h328h305h334h319h301h288h249h246h
Data source: Saint Augustine South September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Saint Augustine South During September

When considering the likelihood of sunny weather in September in Saint Augustine, the patterns from the year reveal a noteworthy trend. After enjoying midyear months like April and May, which boast a 50% chance of sunshine, the sunny prospects begin to decline through the summer, reaching a low of 17% in August. By September, the likelihood rises slightly to 36%, indicating a transitional period as the summer heat wanes and the fall season approaches. This boost in sunny days compared to the previous month offers a hopeful glimpse for those looking to enjoy outdoor activities, even as it remains less favorable than the early and late months of the year, like October's 46% chance. Overall, while September does present a moderate chance for sunshine, it reflects the ebb and flow of seasonal weather patterns in this charming coastal city.

Percentage of Sunny Days in September in Saint Augustine South

The chart illustrates the percentage of sunny days in Saint Augustine South 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 Saint Augustine South experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec42%44%40%50%50%21%21%17%36%46%45%52%
Data source: Saint Augustine South September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Saint Augustine South in September

As summer fades into autumn, September in Saint Augustine South sees a transition in daylight hours, offering approximately 12 hours of sunlight each day. This slight decrease from the 14 hours in June marks the beginning of longer nights as the days gradually shorten. Following the patterns of previous months, daylight begins to taper off after the sun-soaked days of summer, with daylight peaking in May and June. The month of September maintains a sweet spot of sunlight, bridging the transition between the lush vibrancy of summer and the cooler hues of fall, setting the stage for the 11-hour daylight that awaits in October.

Average Daylight Hours in Saint Augustine South for September

The chart illustrates the variation in daylight duration in Saint Augustine South throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 27m11h 8m12h12h 54m13h 39m14h13h 49m13h 9m12h 17m11h 24m10h 38m10h 15m
Data source: Saint Augustine South daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Saint Augustine South

September in Saint Augustine experiences a notable decline in wind speed, averaging just 2.9 m/s (approximately 6 mph), making it the calmest month of the year. This shift from the summer's gentle breezes reflects a transitional period as the warmer months give way to the refreshing autumn air. The dipping wind speeds are consistent with the trend observed from July through August, where the average lingered at a modest 3.2 m/s. As the days shorten and temperatures begin to cool, the serene September winds offer a peaceful backdrop, inviting residents and visitors alike to enjoy the stunning coastal landscapes without the usual gusty interruptions. With the promise of more invigorating breezes on the horizon in October and November, September serves as a gentle interlude in Saint Augustine's annual climate rhythm.

Average September Wind Speed in Saint Augustine South

The chart displays monthly wind speed patterns in Saint Augustine South, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.83.94.43.84.13.63.23.22.9 m/s3.44.33.4
Data source: Saint Augustine South September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Saint Augustine South Compares to Other Months

The weather in Saint Augustine South 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 Saint Augustine South and find detailed weather information for every month.

The weather in September contrasts sharply with that of January. In September, temperatures range from a warm minimum of 20°C (68°F) to a sweltering maximum of 33°C (92°F), averaging at 27°C (81°F). This month sees significant rainfall, with 162 mm (6.4 in) of precipitation spread over 19 days, accompanied by high humidity at 83%. In comparison, January offers a much cooler climate, with temperatures swinging from a chilly minimum of 0°C (33°F) to a pleasant maximum of 25°C (77°F), averaging 15°C (60°F). Rainfall is minimal during this time, totaling only 47 mm (1.9 in) over just 5 days, yet the humidity remains consistent at 83%. For more specific insights on January weather, you can visit Saint Augustine South weather in January.

September and February present a striking contrast in weather patterns. In September, temperatures are relatively high, with a minimum of 20°C (68°F) and an average of 27°C (81°F), peaking at 33°C (92°F). This month also sees significant rainfall, accumulating to 162 mm (6.4 in) over 19 days, coupled with high humidity at 83%. In contrast, February offers a cooler climate, featuring a minimum temperature of 5°C (41°F) and an average of 17°C (63°F), with a maximum of 26°C (79°F). Precipitation is less frequent and lighter, totaling 61 mm (2.4 in) across 9 days, and humidity remains relatively steady at 80%. For more detailed information, you can check Saint Augustine South weather in February.

When comparing the weather of September and March, significant differences emerge. September boasts much warmer temperatures, with a minimum of 20°C (68°F) and an average of 27°C (81°F), reaching a maximum of 33°C (92°F). In contrast, March experiences cooler conditions, featuring a minimum of 6°C (44°F) and an average of 18°C (66°F), with highs of 28°C (82°F). Additionally, September is considerably wetter, receiving 162 mm (6.4 in) of precipitation over 19 days, whereas March sees only 34 mm (1.3 in) of rain across just 6 days. Humidity levels are also higher in September at 83%, compared to March's 75%. For a more detailed overview, you can visit Saint Augustine South weather in March.

The weather in September tends to be warmer and more humid compared to April. September features a minimum temperature of 20°C (68°F) and an average of 27°C (81°F), reaching a maximum of 33°C (92°F), along with significant rainfall totaling 162 mm (6.4 in) spread over 19 days. In contrast, April generally provides a more moderate climate, with temperatures ranging from a minimum of 11°C (52°F) to an average of 21°C (70°F) and a peak of 30°C (85°F). Additionally, April sees significantly less precipitation, accumulating only 82 mm (3.2 in) over just 7 days, all while maintaining a lower humidity level of 70%. For a more detailed look at April's weather, check out Saint Augustine South weather in April.

When comparing the weather in September and May, a noticeable difference can be observed in both temperature and precipitation. September typically experiences warmer conditions, with minimum temperatures around 20°C (68°F) and daily averages reaching 27°C (81°F), peaking at 33°C (92°F). In contrast, May offers slightly cooler temperatures, starting at a minimum of 14°C (58°F) and averaging 24°C (76°F) with a maximum of 32°C (90°F).

Moreover, September is much rainier, receiving 162 mm (6.4 in) of precipitation over 19 days, while May sees significantly less, with only 77 mm (3.0 in) over 8 days. This results in higher humidity in September at 83%, compared to May's 68%. For more detailed information, you can visit Saint Augustine South weather in May.

In September, the weather tends to be slightly warmer overall, with minimum temperatures of 20°C (68°F) compared to June's minimum of 22°C (72°F). Both months experience a maximum temperature that peaks at 33°C (92°F), but September has a higher average temperature of 27°C (81°F) versus June's 26°C (80°F). Additionally, September sees more precipitation, with 162 mm (6.4 in) over 19 days, while June has 143 mm (5.6 in) spread over 22 days. Notably, September is also more humid at 83%, in contrast to the 75% humidity experienced in June. For more detailed information, you can check Saint Augustine South weather in June.

When comparing the weather in September and July, both months exhibit similar average temperatures, hovering around 27°C (81°F), but with distinct differences in their minimum temperatures—September starts at a milder 20°C (68°F), whereas July begins at a warmer 24°C (75°F). Precipitation levels are quite close as well, with September receiving 162 mm (6.4 in) over 19 days and July slightly less at 161 mm (6.3 in) over 23 days. Additionally, humidity in September is slightly higher at 83% compared to July's 79%. For more insights into July's weather patterns, check out Saint Augustine South weather in July.

In comparing the weather between September and August, we observe a slight decrease in average temperatures, with September recording a minimum of 20°C (68°F) and a maximum of 33°C (92°F) compared to August's minimum of 24°C (75°F) and maximum of 34°C (93°F). Both months experience high humidity, though September is slightly more humid at 83% compared to August's 81%. Precipitation also differs, as September receives more rain with 162 mm (6.4 in) over 19 days, while August has 146 mm (5.8 in) over 24 days. For further details on August weather, you can check Saint Augustine South weather in August.

In September, temperatures in Saint Augustine South range from a minimum of 20°C (68°F) to a maximum of 33°C (92°F), with an average of 27°C (81°F). This month experiences high humidity at 83% and significant rainfall, totaling 162 mm (6.4 in) over 19 days. In contrast, October sees a noticeable drop in minimum temperatures, reaching 11°C (51°F), while the average falls to 25°C (77°F) and the maximum remains relatively high at 32°C (89°F). Precipitation decreases to 123 mm (4.9 in) over 16 days, with humidity slightly declining to 81%. For a detailed overview, you can check Saint Augustine South weather in October.

In September, weather conditions are characterized by warmer temperatures, with a minimum of 20°C (68°F) and an average of 27°C (81°F), peaking at 33°C (92°F). The month also sees significant rainfall, with 162 mm (6.4 in) of precipitation over 19 days, and humidity levels averaging around 83%. In contrast, November brings a notable drop in temperatures, with a minimum of 6°C (43°F) and an average of 20°C (68°F), while the maximum reaches 30°C (86°F). Precipitation decreases in November to 91 mm (3.6 in) over just 10 days, with slightly lower humidity at 82%. For more detailed insights, check out the Saint Augustine South weather in November.

September and December showcase contrasting weather patterns. In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 33°C (92°F), with an average of 27°C (81°F). The month is characterized by significant rainfall, totaling 162 mm (6.4 in) over 19 days, and a high humidity level of 83%. In sharp contrast, December experiences much cooler temperatures, with a minimum of 4°C (39°F), an average of 17°C (63°F), and a maximum of 26°C (78°F). Precipitation drops significantly to 70 mm (2.7 in) over just 8 days, while humidity remains relatively high at 84%. For more details on December weather in this area, visit Saint Augustine South weather in December.

Compare Saint Augustine South's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Saint Augustine South

As summer transitions into fall, September in Saint Augustine South offers a warm, humid climate that is characterized by its tropical feel. While daytime temperatures comfortably hover around the average of 27°C, the peak heat can reach a sweltering 33°C. Frequent rain showers, occurring on about 19 days, contribute to a substantial 162 mm of precipitation, making September notably wetter compared to the drier months that precede it. This combination of warmth and increased humidity offers an inviting atmosphere, although the 83% humidity can be a bit sticky. For a more comprehensive understanding of what to expect, check out the detailed insights at Saint Augustine South Climate.