Last updated: August 28, 2025
Experience the delightful September weather in Arusha, Tanzania, where temperatures range from a comfortable 10°C (50°F) at night to a pleasant 27°C (82°F) during the day. With an average temperature of 18°C (65°F), this month offers a mild climate perfect for outdoor activities. Rain is minimal, with only 8 mm (0.3 in) of precipitation over just one day, allowing for ample sunshine. The humidity stays at a moderate 60%, enhancing the overall experience of this vibrant region. Embrace the splendor of September in Arusha, where nature's beauty meets an inviting atmosphere!
In September, Arusha, Tanzania, experiences a pleasant shift in temperatures as it transitions from the cooler winter months. With minimums around 10°C (50°F) and maximums peaking at 27°C (82°F), the weather showcases an inviting warmth, perfect for outdoor adventures. The average temperature hovers around 18°C (65°F), making it a comfortable time for exploration. Compared to the preceding months, there's a notable rise, signaling the gradual approach of the warmer season while still retaining the refreshing coolness of nighttime temperatures. This balance creates an enjoyable climate that enchants both locals and visitors alike, allowing for diverse activities in the stunning landscapes of Arusha.
September in Arusha, Tanzania marks a notable shift in precipitation patterns, as the month typically sees a dramatic decrease in rainfall. With only 8 mm (0.3 in) of rain falling over just 1 day, it’s one of the driest months of the year, signaling the end of the long dry season. This minimal rainfall contrasts sharply with the wetter months that precede it, particularly March and April, which experience significant downpours. The transition into September offers a brief respite before the rains return in October, when precipitation rises again to 51 mm (2.0 in). This trend highlights Arusha's distinctive climate, characterized by its pronounced wet and dry seasons, making September a serene time to explore the landscapes without the distraction of heavy rain.
In September, Arusha experiences a humidity level of 60%, marking a slight increase from the drier months of March and April, which recorded 55% and 58%, respectively. This transition signals the onset of more humid conditions as the region shifts towards the end of the dry season. Comparatively, September's humidity is lower than the peak months of November and December, which see levels soaring to 83% and 84%. Overall, this month reflects a balance, positioned between the drier winter months and the more humid rainy season ahead, providing a pleasant climate for both visitors and locals.
In September, Arusha experiences a UV Index of 14, placing it firmly in the extreme exposure category, with a burn time of just 10 minutes. This marks a slight decline from the higher indices seen from January through August, where values reached as high as 16. As the year progresses into fall, the UV levels remain notably high, with minimal variation, highlighting the region's intense sun exposure year-round. Travelers and residents alike should take precautions against harmful UV rays, as consistent trends indicate that sun safety is paramount. For detailed information about UV levels throughout the year, visit Arusha UV Index.
UV Risk Categories
September in Arusha, Tanzania, basks in plenty of sunshine, boasting an impressive 333 hours of daylight. This month continues the trend of abundant sunlight that characterizes the latter half of the year, following the peak of 336 hours in both August and March. The weather remains delightful, with a gradual increase leading into October, which promises even brighter days at 350 hours. As the dry season transitions into the vibrant early stages of October, September’s sunlit days serve as a perfect backdrop for exploring Arusha's stunning landscapes and rich culture. Overall, the consistent hours of sunshine during these months invite both adventure and relaxation, showcasing the best of Tanzania's natural beauty.
In September, Arusha, Tanzania, enjoys a notable increase in sunny days, with the likelihood of clear skies reaching 44%. This trend follows a series of varied percentages throughout the year, where April and May present the lowest chances of sunshine at just 21% and 20%, respectively. As we transition from the chill of July and August, which see percentages of 26% and 41%, September marks a welcome shift towards more radiant weather. This upward trajectory continues into October and November, where the chance of sun peaks at 47%, making September an ideal time for outdoor activities under the bright African sun.
In September, Arusha, Tanzania, enjoys a return to 12 hours of daylight, marking a transition from the shorter days of the previous months. This pattern of consistent daylight hours, with 12 hours dominating from January to April and then returning in September to December, highlights a unique characteristic of Arusha's equatorial climate. The period from May to August sees a slight decrease, with 11 hours of daylight, yet this fluctuation remains minimal compared to many other regions. As the days lengthen once more in September, residents and visitors alike can relish the vibrant outdoor activities and breathtaking landscapes that Arusha is renowned for, benefitting from a balance of daylight that remains relatively stable throughout the year.
In September, Arusha, Tanzania, experiences a gentle increase in wind speed, averaging 2.4 m/s (5 mph), which is a slight uptick from the previous month. This transition marks the culmination of the region's wind patterns, as the air begins to invigorate with a refreshing breeze. Following a gradual rise from 1.5 m/s in January to 2.5 m/s in July, the winds this month continue to maintain a pleasant consistency. The change in September not only signifies the shift from the colder months but also enhances the charm of Arusha's idyllic scenery, making it an ideal time for outdoor enthusiasts to explore the breathtaking landscapes. As the year progresses into October with an average of 2.1 m/s, the winds remain relatively stable, indicating a return to calmer conditions as Arusha begins to transition back into the warmer months.
Weather in Arusha varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Arusha, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January offer distinct weather experiences. In September, temperatures range from a mild 10°C (50°F) at night to a warm 27°C (82°F) during the day, making it relatively comfortable with a low average of 18°C (65°F). The month sees little precipitation, totaling just 8 mm (0.3 in) over one rainy day, with humidity at 60%. In contrast, January features slightly warmer nights at 11°C (53°F) and hotter daytime highs reaching 29°C (85°F), resulting in a higher average temperature of 20°C (68°F). However, January is much wetter, with precipitation amounting to 91 mm (3.6 in) spread over 11 days and increased humidity at 68%. For more details on January weather, visit Arusha weather in January.
September and February present distinctly different weather experiences. September enjoys mild temperatures, with a minimum of 10°C (50°F) and a maximum reaching 27°C (82°F), while February is slightly warmer, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 30°C (86°F). In terms of precipitation, September is relatively dry, receiving only 8 mm (0.3 in) over just one day, whereas February is considerably wetter, with 75 mm (2.9 in) spread across nine days. Both months have similar humidity levels, hovering around 60-62%. For more detailed information, you can check Arusha weather in February.
In comparing the weather of September and March, there are notable differences in temperature and precipitation. September typically experiences milder temperatures with a minimum of 10°C (50°F), an average of 18°C (65°F), and a maximum of 27°C (82°F). This month sees low rainfall, with only 8 mm (0.3 in) recorded over just 1 day, contributing to a humidity level of 60%. In contrast, March is significantly warmer, with a minimum of 12°C (53°F), an average of 21°C (70°F), and a maximum of 31°C (87°F). However, it is also much wetter, receiving 201 mm (7.9 in) of precipitation over 16 days, while humidity is slightly lower at 55%. For a detailed overview of weather patterns in March, visit Arusha weather in March.
September and April showcase distinct weather patterns. In September, temperatures range from a mild 10°C (50°F) to a comfortable high of 27°C (82°F), but the month sees very little rainfall, averaging only 8 mm (0.3 in) over just one day. The humidity during this time is relatively moderate at 60%. In contrast, April experiences warmer conditions with minimum temperatures of 14°C (57°F) and a maximum of 28°C (83°F). However, it is notably wetter, receiving an impressive 174 mm (6.9 in) of precipitation across 26 days, coupled with humidity levels around 58%. For more detailed insights, you can check Arusha weather in April.
In comparing the weather of September and May, both months exhibit similar temperature ranges, with minimums around 10°C (50°F) and average temperatures hovering between 18°C (64°F to 65°F). However, September tends to be drier, experiencing only 8 mm (0.3 in) of precipitation over just 1 day, while May is significantly wetter, receiving 68 mm (2.7 in) across about 15 days. Additionally, humidity levels are higher in May at 71%, compared to 60% in September, leading to a more humid feel. For more details on May weather, you can visit Arusha weather in May.
September generally offers milder temperatures compared to June, with average temperatures ranging from a minimum of 10°C (50°F) to a maximum of 27°C (82°F) versus June’s range of 8°C (47°F) to 24°C (76°F). While both months experience limited rainfall, September sees only 8 mm (0.3 in) over just 1 day, compared to June's 11 mm (0.4 in) over 3 days. Additionally, September boasts lower humidity at 60%, whereas June has a higher humidity level of 73%, providing a warmer feeling in the air. For more detailed information, you can check Arusha weather in June.
In comparing the weather between September and July, September tends to be warmer with an average temperature of 18°C (65°F) and a maximum reaching up to 27°C (82°F), while July has a slightly cooler average of 16°C (60°F) and a maximum of 24°C (76°F). Additionally, September experiences less precipitation, with only 8 mm (0.3 in) over 1 day, compared to July's 10 mm (0.4 in) over 2 days. The humidity is also lower in September at 60%, in contrast to July's 68%. For a deeper look at July's climate, check out Arusha weather in July.
In comparing the weather of September to August, September generally experiences slightly warmer temperatures, with a minimum of 10°C (50°F) and an average of 18°C (65°F), compared to August's minimum of 7°C (45°F) and average of 17°C (62°F). Both months reach a maximum of 27°C (81°F), but September enjoys less precipitation, receiving only 8 mm (0.3 in) over 1 day, while August sees 11 mm (0.4 in) across 2 days. Humidity levels are also marginally lower in September at 60%, compared to 63% in August. For a detailed look at August's weather, visit Arusha weather in August.
In September, the weather is typically mild, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 27°C (82°F). This month experiences relatively low precipitation, with only 8 mm (0.3 in) spread over just one day, and humidity levels hovering around 60%. In contrast, October sees a slight increase in average temperature to 19°C (67°F) and a higher maximum of 29°C (84°F). However, it also brings significantly more rainfall, totaling 51 mm (2.0 in) over 12 days, along with slightly more humidity at 68%. For more detailed information, you can visit Arusha weather in October.
September and November display contrasting weather patterns in Arusha. September typically offers a milder climate with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 27°C (82°F) and only 8 mm (0.3 in) of precipitation spread over just 1 day. In contrast, November sees slightly warmer temperatures, with minimums around 12°C (54°F) and maximums reaching 30°C (86°F), but it is also significantly wetter, accumulating 112 mm (4.4 in) of rainfall over 18 days. Additionally, humidity rises from 60% in September to 83% in November, highlighting the shift towards a more humid environment. For more details, check out Arusha weather in November.
September and December present distinct contrasts in weather. In September, temperatures range from a minimum of 10°C (50°F) to a maximum of 27°C (82°F), with an average of 18°C (65°F). The month typically sees little rainfall, with only 8 mm (0.3 in) and just one rainy day, maintaining a comfortable humidity level of 60%. In contrast, December experiences warmer temperatures, with a minimum of 12°C (54°F) and a maximum of 29°C (84°F), averaging around 20°C (67°F). However, this month is significantly wetter, with a staggering 112 mm (4.4 in) of precipitation over 20 days and higher humidity at 84%. For more detailed information, check out the overview of Arusha weather in December.
In September, Arusha experiences a delightful transition into the dry season, characterized by pleasant temperatures and significantly lower rainfall compared to the preceding months. With an average temperature of around 18°C (65°F), days are warm yet comfortable, making this an ideal time for outdoor adventures. The humidity drops to about 60%, enhancing the overall enjoyment of the crisp, clear skies. With just a single day of rain and minimal precipitation, travelers can revel in the stunning landscapes without the interruptions of wet weather. For those looking to plan a visit, September offers a perfect blend of favorable conditions—explore more about the region's climate here: Arusha Climate.