Last updated: August 28, 2025
Experience the charm of Zanzibar, Tanzania in September, where the island welcomes you with mild temperatures averaging around 26°C (79°F). Daily highs reach a pleasant 30°C (86°F), while the nights offer a comfortable low of 22°C (72°F), ideal for evening strolls along the vibrant shores. Although the month sees about 35 mm (1.4 in) of rain spread over 14 days, this moisture contributes to the lush greenery and refreshes the atmosphere. With a humidity level of 73%, you’ll feel the tropical embrace as you explore the rich culture and natural beauty of this stunning destination.
In September, Zanzibar enjoys a delightful transition into the dry season, characterized by warm and comfortable temperatures. With minimums hovering around 22°C (72°F) and averages reaching 26°C (79°F), the island experiences a pleasant climate perfect for beach outings and exploration. The maximum temperatures peak at 30°C (86°F), providing ample warmth without the oppressive heat often felt in the earlier months. This trend of mild yet warm weather sets the stage for outdoor adventures, making September an ideal time for travelers seeking a vibrant yet manageable tropical experience.
In September, Zanzibar experiences a shift towards milder precipitation, with 35 mm (1.4 in) of rain spread over 14 days. This marks an upward trend from the drier months of July and August, reflecting the island's transition into the wetter season. While the rainfall is still relatively light compared to the torrential downpours seen in April and May, the increased precipitation serves to rejuvenate the lush landscapes that Zanzibar is known for. As the month whispers the promise of rainier days ahead, visitors can expect a mix of sunny spells and refreshing showers, making September a unique time to experience the island's natural beauty.
In September, Zanzibar experiences a modest dip in humidity, averaging around 73%, marking it as one of the drier months of the year. This decline follows the trend from the summer months, where humidity levels peaked in May at 86% and gradually decreased into late summer. Notably, as the island transitions into the following months, humidity begins to rise again, with October showing a slight increase to 75%. This pattern highlights Zanzibar's delightful seasonal shifts, offering visitors a refreshing break before the return of higher humidity levels in late fall and December, which reach up to 85%. Overall, September serves as a bridge between the humid highs of winter and the more moderate conditions of the autumn months, making it a comfortable period for exploration.
In September, Zanzibar experiences a high UV Index of 13, categorized as extreme, which means you can burn in just 10 minutes of sun exposure. This month marks a slight dip from the peak levels observed in the earlier months of the year, where January to April consistently showcase a striking UV Index of 14. As the seasons shift, the UV index remains notably high, making it essential for both locals and visitors to remain vigilant about sun protection. With the trend of extreme exposure continuing into October and November, taking precautions is crucial. For more detailed insights, visit Zanzibar UV Index.
UV Risk Categories
September in Zanzibar, Tanzania, basks in a delightful average of 342 hours of sunshine, a testament to the region's splendid climate. As winter wanes in the Northern Hemisphere, the island remains a tropical haven, delivering nearly as much sunlight as the peak of summer in August. This time of year marks a seamless transition towards October, which boasts an impressive 348 hours of sunlight, slightly edging out September. The trend reveals an uplifting pattern of increasing sunshine as the year progresses, peaking in December at 354 hours. Such a rich tapestry of sunshine not only invites travelers to explore its cultural treasures but also enhances the vibrant allure of Zanzibar's sun-kissed beaches throughout the month.
In September, Zanzibar witnesses a promising 62% chance of sunny weather, making it one of the more favorable months for sunshine on the island. This marks a noticeable increase from the less sunny months of April and May, which have lower probabilities of clear skies at 24% and 44%, respectively. August sets the stage with a 58% chance of sunshine, but September truly shines as the transition to the warmer months begins, leading into October and November, both at an impressive 66%. This upward trend highlights September as a delightful time for travelers seeking vibrant beach days and stunning sunsets, making it a fantastic choice for an escape to this tropical paradise.
In Zanzibar, Tanzania, the month of September heralds a return to longer days, as daylight reaches an inviting 12 hours. This marks a serene transition after the slightly shorter days of winter, where daylight lingered at 11 hours from April to August. Interestingly, Zanzibar's daylight duration remains relatively stable throughout the year, with only slight fluctuations, typically swinging back to the comforting 12-hour mark in September and continuing through the end of the year until January. This consistency creates a delightful rhythm for both locals and visitors, who can relish in almost equal parts of sunshine and twilight under the beautiful skies of this tropical paradise.
As September arrives in Zanzibar, the winds begin to mellow, averaging 3.8 m/s (9 mph), a slight uptick from the calmness of August. This gentle breeze sets the stage for a more relaxed ambiance, perfect for exploring the island's vibrant culture or lounging on its stunning beaches. Following a strong July, where winds reached up to 5.1 m/s (12 mph), the transition into September indicates a trend of diminishing gusts as the year progresses. While the winds are lighter than the summer peak, they still provide a delightful backdrop to the island's serene landscapes, hinting at a gradual shift towards the milder breezes of the latter months, with a gradual decline culminating in December’s calmest winds. The September breeze, characterized by its moderate pace, invites visitors to enjoy the lush surroundings and cultural richness of Zanzibar in a comfortably breezy embrace.
Weather in Zanzibar varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Zanzibar, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is warm with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), and an average temperature of 26°C (79°F). This month experiences moderate rainfall, totaling 35 mm (1.4 in) spread over 14 days, and the humidity is relatively high at 73%. In contrast, January is even warmer, with minimum temperatures of 25°C (77°F) and a maximum reaching 33°C (91°F), averaging 28°C (83°F). The precipitation increases to 52 mm (2.0 in) over 13 days, and humidity rises slightly to 82%. For more detailed information, you can check Zanzibar weather in January.
In September, the weather is warm yet slightly milder, with average temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F). This month experiences about 35 mm (1.4 in) of precipitation over 14 days, accompanied by a humidity level of 73%. In contrast, February sees even warmer temperatures, with a minimum of 25°C (78°F) and maximum reaching 33°C (91°F). The month typically receives around 59 mm (2.3 in) of rainfall over 13 days, resulting in a slightly higher humidity level of 78%. For more details about February weather, check out Zanzibar weather in February.
In comparing the weather between September and March, September tends to be warmer, with average temperatures ranging from 22°C (72°F) to a maximum of 30°C (86°F) and humidity at 73%. In contrast, March is slightly hotter, with minimum temperatures around 25°C (77°F) and highs reaching 33°C (92°F), but it also experiences significantly higher precipitation, averaging 133 mm (5.2 in) over 20 days, which contributes to a humidity level of 76%. For a more detailed look at the conditions in March, you can visit Zanzibar weather in March.
When comparing the weather in September and April, September boasts a generally milder climate with average temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F) and 35 mm (1.4 in) of precipitation over 14 days. In contrast, April experiences warmer conditions, characterized by higher temperatures, with a minimum of 24°C (75°F) and a maximum of 33°C (92°F), along with significantly increased rainfall totaling 276 mm (10.8 in) spread across 28 days. Both months have high humidity levels, with September at 73% and April slightly higher at 79%. For more specifics on April weather in Zanzibar, check out Zanzibar weather in April.
In comparing the weather of September and May, we find that both months share similar average temperatures, hovering around 26°C (79°F) with maximums reaching 30°C (86°F) in September and 30°C (87°F) in May. However, September tends to be drier, with only 35mm (1.4 in) of precipitation occurring over 14 days, while May experiences significantly heavier rainfall, totaling 225mm (8.8 in) across 22 days. Additionally, humidity is higher in May at 86%, compared to 73% in September, making May feel more muggy and damp. For more details on the weather during this period, you can check Zanzibar weather in May.
In comparing the weather between September and June, we see some notable similarities and differences. Both months feature a minimum temperature of 22°C (72°F) and an average of 26°C (79°F), with maximum temperatures peaking at 30°C (86°F). However, June experiences slightly higher humidity at 84%, compared to September's 73%. In terms of precipitation, June sees a total of 45 mm (1.8 in) over 12 days, while September has less rain with 35 mm (1.4 in) over 14 days. For more detailed insights on June weather, you can check Zanzibar weather in June.
In comparing the weather between July and September, we observe that both months start with a minimum temperature of 22°C (72°F), but September tends to be slightly warmer overall with an average of 26°C (79°F) compared to July's 25°C (78°F). Additionally, the maximum temperatures in September reach up to 30°C (86°F), offering a few more degrees of warmth than July's maximum of 29°C (85°F). Precipitation is relatively comparable, with September experiencing 35 mm (1.4 in) over 14 days, while July sees slightly less, with 31 mm (1.2 in) over just 10 days. It's noteworthy that humidity is higher in July at 80%, compared to 73% in September. For further insights, you can check out Zanzibar weather in July.
When comparing the weather of September to that of August, we notice some subtle differences. September sees a slightly higher average temperature of 26°C (79°F) compared to August's 25°C (78°F), but both months share the same minimum and maximum temperatures of 22°C (72°F) and 30°C (86°F), respectively. Precipitation levels are comparable, with September recording 35 mm (1.4 in) over 14 days, slightly more than August's 33 mm (1.3 in) over 11 days. Humidity remains consistent, with September at 73% and August at 74%. For more detailed insights into August weather, you can check Zanzibar weather in August.
September and October showcase a gradual transition in weather patterns, with both months experiencing similar average temperatures around 26°C (79°F). However, October tends to be slightly warmer, with a minimum temperature of 23°C (73°F) compared to September's 22°C (72°F) and a higher maximum of 31°C (88°F). Precipitation increases significantly in October, with 92 mm (3.6 in) over 16 days, in contrast to September's 35 mm (1.4 in) over just 14 days. Humidity also climbs slightly from 73% in September to 75% in October, adding to the overall mugginess of the atmosphere. For more detailed insights, check out Zanzibar weather in October.
September and November exhibit distinct weather patterns in Zanzibar, with November having slightly warmer temperatures. In September, the temperatures range from a minimum of 22°C (72°F) to a maximum of 30°C (86°F) and average around 26°C (79°F), accompanied by a lower humidity level of 73% and less rainfall at 35 mm (1.4 in) over 14 days. In contrast, November sees a rise in temperatures with minimums of 24°C (75°F) and maximums reaching 32°C (90°F), resulting in an average of 27°C (81°F). However, this month experiences significantly increased rainfall, totaling 112 mm (4.4 in) over 22 days, and a higher humidity level of 84%. For more details, visit Zanzibar weather in November.
September and December present notable differences in weather patterns. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), with an average of 26°C (79°F), alongside moderate humidity at 73%. The month sees around 35 mm (1.4 in) of precipitation over 14 days. In contrast, December experiences slightly higher temperatures, with a minimum of 24°C (76°F) and an average of 28°C (83°F), peaking at 31°C (89°F). However, it also brings increased humidity at 85% and significantly more rainfall, totaling 137 mm (5.4 in) over 26 days. For more details, visit Zanzibar weather in December.
As September rolls in, Zanzibar experiences a pleasant departure from the heavy rains of the previous months. With average temperatures hovering around a comfortable 26°C (79°F), this month offers an inviting atmosphere for explorers. Humidity levels remain relatively high at 73%, but the 35 mm of precipitation, spread over about 14 days, signals a transition towards drier weather. This slight reduction in rainfall and milder temperatures make September a fantastic time for visitors to enjoy the island's stunning beaches and rich culture. For a detailed overview of what to expect throughout the year, check out the Zanzibar Climate page.