Last updated: August 31, 2025
September in the Saint Lucia Estuary offers a delightful blend of mild temperatures and moderate rainfall, making it an excellent time for visitors to experience its unique ecosystems. With daily highs reaching a comfortable 27°C (81°F) and averages around 21°C (70°F), nature enthusiasts can enjoy a range of outdoor activities. Nights cool off to a refreshing 15°C (60°F), perfect for cozy evenings. The region receives approximately 63 mm (2.5 in) of precipitation over 9 days, contributing to its lush landscapes. Coupled with a high humidity level of 85%, September fosters an inviting atmosphere for exploring the rich biodiversity of this remarkable coastal sanctuary.
As September ushers in the transition from winter to spring in Saint Lucia Estuary, South Africa, temperatures begin to rise, offering a delightful preview of the warmer months ahead. The minimum temperature hovers around a comfortable 15°C (60°F), while average temperatures gradually climb to 21°C (70°F), peaking at a maximum of 27°C (81°F). This gentle warming trend is a refreshing change from the cooler July and August months, making September an inviting time to explore the rich biodiversity of the estuary. With pleasant daytime warmth and the promise of milder evenings, it's an ideal period for outdoor adventures, whether you're birdwatching or enjoying the scenic views along the coastline.
September in the Saint Lucia Estuary, South Africa, marks a transitional phase in precipitation patterns as the dry winter months give way to the early signs of spring. With 63 mm (2.5 in) of rainfall spread over 9 days, it reflects a modest increase compared to the preceding months of July and August, which saw considerably less rain at 26 mm (1.0 in) and 61 mm (2.4 in)**, respectively. This subtle uptick signifies the gradual reawakening of the region’s biodiversity and prepares the locale for the more substantial rains of October, which typically averages 90 mm (3.5 in) as the wet season approaches. The overall trend illustrates a clear shift from the dry spell, laying the groundwork for the lush landscapes characteristic of the spring and summer months ahead.
In September, the humidity in the Saint Lucia Estuary, South Africa, rises to 85%, marking a notable increase from the cooler months of August. Throughout the year, humidity tends to hover between 79% and 87%, with the peak in November at 87%. Interestingly, the driest months are July and August, both falling to around 80%. This pattern reveals a distinct seasonal rhythm, where the high humidity of early months gradually stabilizes before dipping slightly in mid-year, only to climb back as spring approaches. Thus, September serves as a transitional month, blending the lingering warmth of winter with the anticipatory moisture of summer.
In September, the UV Index in Saint Lucia Estuary reaches 9, categorizing it as very high with a burn time of just 15 minutes. This marks a return to elevated UV levels following the slightly lower measurements during the winter months of June and July, which averaged around 5. The trend indicates that as spring approaches, UV exposure becomes more intense, reminiscent of the higher levels seen in the earlier months of the year. With similar readings observed in April, this season underscores the importance of sun safety during outdoor activities. For ongoing updates and detailed information, check out the Saint Lucia Estuary UV Index.
UV Risk Categories
September in the Saint Lucia Estuary offers a delightful blend of warmth and sunshine, with an impressive 310 hours of sunlight illuminating the landscape. As winter gives way to spring, the days gradually lengthen, reflecting a gentle upward trend that has been witnessed since the depths of June's 289 hours. This month stands as a precursor to the sunnier days ahead, as both October and November promise to bask in even more sunlight, with averages of 326 and 336 hours, respectively. With the estuary's vibrant ecosystem awakening, September's moderate sunlight sets the stage for the region's natural beauty to flourish, inviting visitors to revel in the outdoors.
As September arrives in Saint Lucia Estuary, the region continues to embrace the lingering warmth of winter. With a 56% chance of sunny weather, this month marks a delightful balance as it transitions from the peak of winter into early spring. Following a notable rise in sunshine hours during July (82%) and the somewhat consistent weather of August (63%), September retains a promising likelihood of clear skies. This trend highlights a gradual warming as spring approaches, making it an ideal time for outdoor adventures and experiencing the stunning natural beauty of the area. However, as we move into the latter part of the year, the chance of sunny days wanes, hinting at the more overcast conditions expected in October and the following months.
As the seasons transition at Saint Lucia Estuary, September brings a pleasant return to 11 hours of daylight, mirroring the earlier spring-like days of August. This slight uptick continues the trend of increasing daylight following the winter months, which saw a consistent 10 hours from June to July. The gradual lengthening of days from May's 10 hours to September's 11 hours signifies the approach of warmer weather and the vibrant energy of spring. Looking ahead, October promises further daylight expansion, hinting at the basking warmth and longer evenings to come as we move towards the summer months.
In September, the winds at Saint Lucia Estuary pick up, with an average speed of 8.3 m/s (19 mph), just slightly below the preceding month's peak. This time of year signals a transition as the gusts remain robust from the summer months, demonstrating a consistent trend of increasing wind speeds from June through to August. Following the summer peak, September still maintains a lively breeze, setting the stage for mild yet invigorating autumn days. As the year progresses towards October, the winds remain steadfast, just a notch higher at 8.4 m/s, ensuring that this coastal paradise remains a dynamic spot for both nature enthusiasts and adventurous spirits alike.
Weather in Saint Lucia Estuary varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saint Lucia Estuary, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is typically mild with minimum temperatures around 15°C (60°F) and average highs reaching 27°C (81°F). Precipitation is moderate at 63 mm (2.5 in) spread over roughly 9 days, while humidity remains high at 85%. In contrast, January experiences warmer temperatures, with minimums around 22°C (71°F) and average highs of 29°C (84°F). The month is also wetter, with 135 mm (5.3 in) of rainfall occurring over 13 days, maintaining the same high humidity level of 85%. For more detailed information on January weather, visit Saint Lucia Estuary weather in January.
September and February present distinct weather experiences. In September, temperatures range from a minimum of 15°C (60°F) to an average of 21°C (70°F), peaking at 27°C (81°F), accompanied by moderate humidity at 85%. The month experiences 63 mm (2.5 in) of precipitation over about 9 days. In contrast, February is warmer, with a minimum of 22°C (72°F) and an average of 26°C (78°F), reaching a maximum of 28°C (83°F). However, it has significantly more rainfall, totaling 181 mm (7.1 in) across 17 days, and humidity remains slightly higher at 86%. For a deeper insight into February's weather specifics, you can visit Saint Lucia Estuary weather in February.
When comparing the weather in September and March, September typically experiences milder temperatures, with averages ranging from a minimum of 15°C (60°F) to a maximum of 27°C (81°F), while March tends to be warmer, with minimums around 21°C (69°F) and maximums reaching 28°C (83°F). Precipitation levels also differ significantly; September sees about 63 mm (2.5 in) of rain over approximately 9 days, whereas March has a much wetter profile, receiving around 148 mm (5.8 in) over about 15 days. Additionally, humidity remains relatively constant, with September at 85% and March slightly higher at 86%. For a more detailed insight into the climate patterns, you can check Saint Lucia Estuary weather in March.
September and April present contrasting weather conditions, with distinct characteristics that appeal to different preferences. In September, temperatures range from a mild minimum of 15°C (60°F) to a comfortable average of 21°C (70°F), peaking at 27°C (81°F). This month sees about 63 mm (2.5 in) of precipitation over approximately 9 days, maintaining a relatively high humidity level of 85%. In contrast, April experiences warmer temperatures, starting at a minimum of 19°C (67°F) and averaging 24°C (75°F), with maximums reaching 28°C (82°F). However, it tends to be wetter, with total precipitation of 118 mm (4.6 in) spread over 15 days, and humidity is slightly higher at 86%. For more details on the weather in April, you can check out Saint Lucia Estuary weather in April.
When comparing the weather in September and May, September typically offers slightly warmer temperatures, with an average of 21°C (70°F) and a maximum of 27°C (81°F), while May has a similar average temperature of 22°C (73°F) and a maximum of 26°C (79°F). However, May experiences significantly more rainfall, averaging 123 mm (4.8 in) over 12 days, compared to September's 63 mm (2.5 in) over 9 days. Humidity levels remain high in both months, with September at 85% and May at 86%, creating a warm and humid atmosphere. For more detailed information, check out Saint Lucia Estuary weather in May.
In comparing the weather of September and June, both months feature similar average temperatures, hovering around 21°C (70°F). However, September tends to be slightly warmer with maximum temperatures reaching up to 27°C (81°F), compared to June's high of 25°C (78°F). Humidity levels are higher in September at 85%, while June maintains a slightly lower humidity at 80%. Precipitation is comparable in both months, with September receiving 63 mm (2.5 in) over about 9 days and June seeing 69 mm (2.7 in) spread over 7 days. For a more detailed look at June weather in this region, visit Saint Lucia Estuary weather in June.
In comparing the weather between September and July, September tends to be slightly warmer with an average temperature of 21°C (70°F) compared to July's 20°C (69°F). Both months experience similar minimum temperatures; however, September reaches a peak of 27°C (81°F), while July maxes out at 26°C (78°F). Precipitation is notably higher in September, with 63 mm (2.5 in) over 9 days, compared to July’s 26 mm (1.0 in) spread across 8 days. Humidity also increases slightly in September, sitting at 85% versus July’s 80%. For more specific weather details in July, you can refer to this link: Saint Lucia Estuary weather in July.
The weather in September shows a slight increase in temperatures compared to August, with average temperatures rising from 20°C (69°F) in August to 21°C (70°F) in September. Both months experience similar lows, but September peaks at 27°C (81°F), slightly higher than August's maximum of 26°C (78°F). Precipitation levels are comparable, with September receiving 63 mm (2.5 in) over 9 days, just slightly more than August's 61 mm (2.4 in) over 11 days. Humidity also increases in September to 85%, compared to 79% in August, making the latter month feel a bit drier. For more detailed insights, you can check Saint Lucia Estuary weather in August.
In September, the weather features a mild temperature range, with minimums at 15°C (60°F) and maximums peaking at 27°C (81°F), while the average temperature hovers around 21°C (70°F). Precipitation levels are moderate, totaling 63 mm (2.5 in) over about 9 days, accompanied by a humidity level of 85%. In contrast, October brings slightly warmer conditions with a minimum temperature of 17°C (62°F) and maximums reaching 28°C (84°F), while still averaging 21°C (70°F). However, it experiences an increase in precipitation, totaling 90 mm (3.5 in) over 13 days, with a marginal rise in humidity to 86%. For more detailed weather information, you can visit Saint Lucia Estuary weather in October.
In September, the weather is generally mild with temperatures ranging from a minimum of 15°C (60°F) to a maximum of 27°C (81°F), and an average temperature of 21°C (70°F). It experiences 63 mm (2.5 in) of precipitation over about 9 days, with humidity levels around 85%. In contrast, November brings slightly warmer conditions, with temperatures starting at a minimum of 17°C (63°F) and reaching up to 28°C (83°F), averaging at 23°C (73°F). However, November sees increased precipitation at 119 mm (4.7 in) over approximately 12 days, along with a slight rise in humidity to 87%. For more information on weather during this month, check out Saint Lucia Estuary weather in November.
September and December both feature warm temperatures, but December tends to be slightly warmer with average temperatures of 24°C (75°F), compared to September’s average of 21°C (70°F). While both months experience a maximum temperature of 27°C (81°F), September has a cooler minimum of 15°C (60°F) compared to December’s minimum of 19°C (67°F). In terms of precipitation, December is wetter, receiving 92 mm (3.6 in) over 14 days, while September sees only 63 mm (2.5 in) over 9 days. Humidity levels remain high throughout both months, with September at 85% and December slightly higher at 86%. For a detailed look at December weather specifics, you can visit Saint Lucia Estuary weather in December.
In September, Saint Lucia Estuary experiences a transition in weather as the region shifts from the cooler winter months to the warmer spring season. With an average temperature of around 21°C (70°F), this month tends to be pleasantly mild, offering a inviting respite from the heat that follows. Unlike the peak summer months, September brings moderate humidity levels of 85% and a notable chance of rain, with approximately 63 mm falling over about nine days. This combination of warmth and occasional showers sets the stage for lush landscapes and vibrant wildlife, making it an ideal time for nature enthusiasts to explore. For those interested in a detailed overview of how September compares to other months, check out the comprehensive details here: Saint Lucia Estuary Climate.