Last updated: August 21, 2025
In September, Port Louis, Mauritius experiences a pleasant climate characterized by mild temperatures. The maximum temperature reaches around 26°C (79°F), while the average sits at a comfortable 22°C (71°F), and the minimum temperature rarely drops below 18°C (65°F). With precipitation totaling 29 mm (1.1 in) spread over 10 days, visitors can expect occasional rain showers amidst the tropical ambiance. The humidity level hovers around 78%, contributing to the island's lush, vibrant environment. Overall, September is a delightful time to explore the beauty of Port Louis, with its warm weather and refreshing mist.
In September, Port Louis, Mauritius, experiences a delightful transition into spring, with temperatures gradually rising. The minimum temperature hovers around 18°C (65°F), which offers a pleasant start to the day, while the average temperature settles at 22°C (71°F), reflecting the mild and comfortable climate. As the days progress, the maximum temperature reaches 26°C (79°F), perfect for enjoying the sun without the summer's intense heat. This month marks a consistent shift from the cooler winter months of July and August, highlighting a gentle warming trend that sets the stage for the warm, inviting days of October and beyond.
In September, Port Louis, Mauritius experiences a significant drop in precipitation, with only 29 mm (1.1 in) of rain recorded over about 10 days. This marked decline continues the trend observed since the peak of the wet season, as rainfall gradually decreases from the earlier months of the year, where figures reached as high as 181 mm in February. As the island transitions into drier weather, September's reduced moisture heralds the approach of sunnier days, contributing to a more pleasant climate. With just over a week of rain, this month effectively sets the stage for the drier months ahead, offering residents and visitors a delightful reprieve from the heavier downpours of the previous summer.
September in Port Louis, Mauritius, ushers in a notable shift in humidity levels, settling at 78%—a slight drop from the summer peak experienced in February at 86%. As the dry season begins to set in, the humidity gradually decreases from the high of earlier months, reflecting a transition towards the cooler, more comfortable temperatures of the upcoming months. Overall, September serves as a bridge in Port Louis, maintaining a humid atmosphere that characterizes the tropical climate while hinting at a gradual retreat from the summer's intense moisture, paving the way for October's 77%. This subtle ebb and flow of humidity is integral to the island’s allure, blending comfort with the vibrant essence of island life.
In September, Port Louis, Mauritius experiences a UV Index of 11, placing it within the extreme exposure category with a burn time of just 10 minutes. This marks a slight rise from August's UV Index of 10, indicating a return to more intense sun exposure as the island transitions from winter to spring. Notably, the UV indices in early year months like January and February consistently peak at 16, reflecting the extreme nature of the tropical sun throughout much of the year. As we navigate through these months, it's essential for residents and visitors alike to remain vigilant about sun protection to ensure safety during outdoor activities. For more detailed insights, check out the Port Louis UV Index.
UV Risk Categories
September in Port Louis, Mauritius, offers a delightful continuation of the island's radiant sunshine, basking in an impressive 330 hours of bright daylight. Following the vibrant months of winter, which maintained steady sunshine, September welcomes the spring season with a feel of warmth and promise. The trend of increasing daylight hours is evident as the island transitions towards the peak of summer, where October and November further boost the sunshine count, reaching 364 and 372 hours respectively. This consistent emergence of sunlight not only enhances outdoor activities but also uplifts the spirit, making September a perfect time to experience the burgeoning beauty of Mauritius.
In September, Port Louis experiences a 61% chance of sunny weather, marking a delightful transition into spring as the region begins to shake off the winter chill. This figure positions September among the sunnier months, alongside the previous winter months of June and July. Notably, the likelihood of sunshine sees a slight rise compared to the drier months of April (28%) and March (48%), indicating an upward trend towards more radiant days. As the year progresses towards the end of the calendar, the chances continue to improve, peaking in November (66%). With its balmy temperatures and sunny forecasts, September in Port Louis offers an inviting invitation for outdoor adventures and relaxation under the Mauritian sun.
As September unfolds in Port Louis, Mauritius, daylight hours settle at a pleasing 11 hours, mirroring the consistency observed in August and the preceding months of April and May. Following the lengthy days of January and February, which bask in 13 and 12 hours of sunshine respectively, there’s a gradual tapering of daylight that brings a sense of balance as we transition into the heart of spring. With daylight beginning to increase again in October, the trend showcases a natural rhythm, celebrating both the lush beauty of the island and the steady march towards longer, sunnier days.
In September, Port Louis experiences a noticeable uptick in wind activity, with an average wind speed of 6.5 m/s (15 mph), continuing the trend from the breezier winter months. This rise from the calmer winds of the earlier months contrasts sharply with the springtime lull of April and May. Notably, the wind speed reaches its peak in July at 7.3 m/s (16 mph), suggesting that the invigorating winds of September usher in a transition from the more turbulent winter breezes to a milder end of the year. As the island prepares for the warming conditions of October with an average drop back to 5.1 m/s (11 mph), September stands as a vibrant bridge, blending the dynamic energy of the past months with the serened rhythms of the upcoming season.
Weather in Port Louis varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Port Louis, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns in Port Louis. September enjoys mild temperatures, ranging from a minimum of 18°C (65°F) to a maximum of 26°C (79°F), with an average of 22°C (71°F). The month experiences moderate precipitation, totaling 29 mm (1.1 in) over about 10 days, and humidity levels at 78%. In stark contrast, January is much warmer, with temperatures ranging from 21°C (71°F) to a high of 30°C (87°F) and an average of 26°C (79°F). However, it also sees a significant increase in rainfall, reaching 172 mm (6.8 in) over 22 days, accompanied by a slightly higher humidity level of 82%. For a detailed look at January weather, you can visit Port Louis weather in January.
In comparing the weather of September and February, we find distinct differences in temperature and precipitation. September has milder temperatures, ranging from a minimum of 18°C (65°F) to a maximum of 26°C (79°F), with an average of 22°C (71°F). In contrast, February boasts warmer weather, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 30°C (86°F), averaging at 26°C (79°F). Precipitation also varies significantly, as September receives only 29 mm (1.1 in) over approximately 10 days, while February experiences a much wetter climate with 181 mm (7.1 in) of rainfall over 24 days. Furthermore, February's humidity level reaches 86%, compared to September's 78%. For more details, you can check Port Louis weather in February.
In comparing the weather between September and March, it's clear that March tends to be warmer and wetter. September features a milder temperature range with minimums around 18°C (65°F) and maximums reaching 26°C (79°F), while March offers warmer averages with minimum temperatures of 22°C (72°F) and highs up to 30°C (86°F). Additionally, March experiences significantly more precipitation, with 177 mm (7.0 in) over 26 days, compared to September’s 29 mm (1.1 in) over just 10 days. Humidity levels are also higher in March at 82%, compared to September's 78%. For more details on March weather, you can check Port Louis weather in March.
In comparing the weather of September and April, it’s clear that April experiences warmer temperatures overall, with average highs reaching 29°C (85°F) compared to September's maximum of 26°C (79°F). Additionally, April sees higher precipitation, with 112 mm (4.4 in) over 23 days, whereas September has only 29 mm (1.1 in) across 10 days. This results in a slightly more humid atmosphere in April, recorded at 83%, compared to September's 78%. For those interested in the specifics, you can find more detailed information here: Port Louis weather in April.
When comparing September and May weather, September tends to be slightly cooler, with average temperatures ranging from 18°C to 26°C (65°F to 79°F), while May's temperatures are generally warmer, ranging from 20°C to 28°C (68°F to 82°F). In terms of precipitation, May experiences significantly more rainfall, with 56 mm (2.2 in) over 13 days, compared to September's 29 mm (1.1 in) over 10 days. Humidity levels are quite similar in both months, hovering around 78% in September and 80% in May. For a more detailed look at May's weather patterns, you can check this link: Port Louis weather in May.
When comparing the weather in September and June, both months have similar average temperatures, hovering around 22°C (72°F), with maximums reaching 26°C (79°F). However, September tends to be slightly cooler at night, with a minimum temperature of 18°C (65°F), compared to June's minimum of 19°C (67°F). Precipitation levels in June are higher, averaging 40 mm (1.6 in) over 11 days, while September sees less rain at 29 mm (1.1 in) across 10 days. Additionally, humidity is marginally higher in September at 78% versus 74% in June. For more detailed information on June's weather, visit Port Louis weather in June.
In comparing the weather of September and July, we find that both months exhibit similar temperature ranges, with September averaging around 22°C (71°F) and July slightly lower at 21°C (71°F). Interestingly, the maximum temperatures for both months are identical at 26°C (79°F). However, September tends to be a bit drier, with only 29 mm (1.1 in) of precipitation across 10 days, compared to July, which sees more rainfall at 43 mm (1.7 in) over 12 days. Humidity levels are also slightly higher in September at 78%, while July maintains a comfortable 75%. For a more detailed look at July's weather patterns, you can visit Port Louis weather in July.
In comparing the weather of September and August, we see a slight increase in temperatures with September averaging around 22°C (71°F), compared to 21°C (71°F) in August. The maximum temperatures also rise to 26°C (79°F) in September, just above August's peak of 25°C (78°F). While both months experience notable humidity, September is slightly more humid at 78%, compared to August's 74%. Precipitation decreases a bit in September, with 29 mm (1.1 in) over 10 days, compared to August’s 35 mm (1.4 in) over 9 days. For more detailed information, you can check Port Louis weather in August.
As we transition from September to October, the weather shows a slight warming trend. September's temperatures range from a minimum of 18°C (65°F) to a maximum of 26°C (79°F), while October sees slightly higher figures, with minima at 19°C (66°F) and maxima reaching 27°C (81°F). Precipitation increases from 29 mm (1.1 in) in September over 10 days to 41 mm (1.6 in) over 12 days in October, indicating a wet October ahead, albeit with only a slight drop in humidity from 78% to 77%. For more details, check out this link: Port Louis weather in October.
In September, the temperatures in Port Louis range from a minimum of 18°C (65°F) to a maximum of 26°C (79°F), with an average temperature of 22°C (71°F). The month experiences relatively light precipitation, totaling 29 mm (1.1 in) over approximately 10 days, accompanied by a consistent humidity level of 78%.
In contrast, November sees a slight increase in temperatures, with a minimum of 18°C (66°F) and a maximum of 28°C (83°F), resulting in an average temperature of 24°C (76°F). However, this month also brings more substantial rainfall, amounting to 63 mm (2.5 in) over around 15 days, while humidity remains steady at 78%. For more details, you can check the Port Louis weather in November.
In September, the weather is relatively mild with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 26°C (79°F). The month experiences about 29 mm (1.1 in) of precipitation over roughly 10 days, with an average humidity of 78%. In contrast, December boasts warmer conditions, with minimum temperatures starting at 22°C (73°F) and reaching a maximum of 29°C (85°F). The level of precipitation significantly increases to 113 mm (4.5 in) spread over 23 days, accompanied by slightly higher humidity at 81%. For more detailed insights on the weather during this period, you can visit Port Louis weather in December.
As September arrives in Port Louis, the temperatures start to cool pleasantly, offering a delightful break with daily highs around 26°C (79°F) and a refreshing average of 22°C (71°F). This month marks a transition, with the humidity sitting at a comfortable 78%, and while rain may grace the region for about 10 days, the total precipitation remains modest at 29 mm (1.1 in). Compared to the sweltering summer months, September often feels like a breath of fresh air, making it an inviting time for visitors. For more detailed insights into the area's weather patterns, check out Port Louis Climate.