Last updated: August 31, 2025
In Nizwa, Oman, the weather in September is marked by warm temperatures and low humidity, creating a typical arid landscape. With a maximum temperature reaching 40°C (104°F) and an average of 31°C (89°F), daily life is characterized by the intense sun. Nights offer a slight reprieve, with temperatures cooling to a minimum of 23°C (73°F). Surprisingly, precipitation is minimal, averaging only 3 mm (0.1 in) for the month, with no recorded rainfall days. The humidity level remains low at 25%, contributing to the dry heat that defines Nizwa's September climate. Overall, the month showcases the region's stark yet captivating environment, ideal for those who appreciate the allure of desert weather.
As September graces Nizwa, Oman, temperatures begin to showcase a subtle shift reminiscent of the lingering summer heat. With minimums hovering around 23°C (73°F) and averages climbing to a warm 31°C (89°F), this month maintains the warmth established in the sweltering summer months. Peak temperatures reach a maximum of 40°C (104°F), underscoring the intense climate that characterizes Oman. Interestingly, while the heat remains, it’s the gradual cooling anticipation of the approaching autumn that begins to emerge, making September a transitional month. Visitors can expect a warm embrace from the sun, but with slight whispers of relief on the horizon as October draws nearer.
In September, Nizwa, Oman, experiences a notable decrease in precipitation, recording only 3 mm (0.1 in) of rain over the month. This marked reduction carries through from a relatively mild wet season, where rainfall escalated during the summer months. Interestingly, despite the slight rainfall, September registers no precipitation days, highlighting the region's dry spell as it transitions into October. This pattern sets the stage for an uptick in rainfall, as the country prepares for its more substantial monsoon activity later in the fall, hinting at the cyclical nature of Nizwa’s climate.
September in Nizwa, Oman presents a notable transition in humidity levels, with an increase to 25% from the relatively lower figures experienced in the summer months. Following the peak dryness of June at just 17%, the subsequent rise signals the onset of a gradual increase in moisture as the region approaches autumn. This trend continues into October, where humidity levels climb further to 35%, before peaking in late fall and winter. The September humidity serves as an early indicator of the changing season, providing a more comfortable atmosphere after the arid heat of the summer, as residents and visitors alike anticipate the refreshing shifts in the Omani climate.
In September, Nizwa, Oman, experiences a UV Index of 12, categorizing it as extreme with a burn time of just 10 minutes. This trend continues the pattern established in the preceding months, where high levels of UV radiation prevail from March through August, all marked by the extreme classification. As summer transitions into fall, the UV intensity remains notably high, suggesting that precautions are still essential for anyone venturing outdoors. It's crucial to stay informed about these UV levels to protect your skin effectively. For more detailed information on UV exposure in Nizwa, visit Nizwa UV Index.
UV Risk Categories
As summer transitions to autumn, September in Nizwa, Oman, continues to bask in an impressive average of 331 hours of sunshine, maintaining a vibrant atmosphere. This month shows a slight dip from the peak of 367 hours in May but remains well above the annual average, reflecting Nizwa's proclivity for abundant sunlight. The trend in sunshine hours clearly demonstrates the resilience of this region's warm climate, with the highest summer months giving way to a still radiant September, ensuring that residents and visitors alike can enjoy the stunning landscapes and rich cultural heritage bathed in sunlight. As we move into October, there’s a subtle promise of continued warmth with 332 hours, creating a captivating allure that characterizes Nizwa's charm year-round.
In Nizwa, Oman, September tends to exhibit a 63% chance of sunny weather, marking a slight dip from the summer months. This decrease in sunshine probability comes after the peak of July, showcasing a decline in favorable weather as the region shifts into autumn. Compared to earlier months like January (97%) and March (94%), the likelihood in September is more in line with late-summer patterns seen in August (79%). As the year progresses into October, the sun returns with a promising 79% chance, suggesting that while September may not be the sunniest month, it still offers a decent opportunity for clear skies and warm weather, ideal for outdoor exploration.
As the sun rises and sets over Nizwa, Oman, the daylight duration presents an intriguing rhythm throughout the year. September maintains a generous 12 hours of daylight, reflecting a trend that emerges after the long, bright summer months of June to August, which also bask in the same duration. This steady count indicates a gradual shift as the days begin to shorten in anticipation of autumn. Following September, daylight begins to taper off, reaching 11 hours in October and continuing to decline. This cyclical pattern of lengthening days in spring and early summer gives way to shorter, cozier days as the year draws to a close, shaping the scenic beauty and daily life in this historic region.
As September arrives in Nizwa, Oman, the average wind speed gently settles at 1.9 m/s (4 mph), mirroring the slight decline noticed from the summer months. Throughout the year, winds appear to maintain a consistent and mild demeanor, with peak speeds occurring in the spring months of March through May at 2.3 m/s (5 mph). This gradual tapering from summer's slightly breezier days leads into the waning evenings of fall, offering a serene atmosphere for both residents and visitors. The wind's soothing presence, especially in September, creates a perfect backdrop for exploring the vibrant culture and stunning landscapes, inviting all to embrace the beauty of this historical city.
Weather in Nizwa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nizwa, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. September typically features higher temperatures, with a minimum of 23°C (73°F) and an average of 31°C (89°F), soaring to a maximum of 40°C (104°F). The month is characterized by low humidity at 25% and virtually no precipitation, making it a hot and dry time. In contrast, January experiences a significant drop in temperatures, with a minimum of 7°C (45°F) and an average of 19°C (66°F), peaking at 30°C (86°F). This cooler month has higher humidity at 41% and sees some precipitation, totaling 7 mm (0.3 in) over one day. For more detailed information, you can visit Nizwa weather in January.
In September, the weather is characterized by high temperatures, with minimums around 23°C (73°F) and averages reaching up to 31°C (89°F), occasionally peaking at a scorching 40°C (104°F). The month experiences very little precipitation and low humidity levels at 25%. In contrast, February brings a notable drop in temperatures, with minimums around 6°C (44°F) and a comfortable average of 21°C (70°F), peaking at a mild 31°C (88°F). Although both months see minimal rainfall, February has slightly higher humidity at 31%. For those looking to explore the specifics of the climate, see more about Nizwa weather in February.
In September, the weather is characterized by sweltering temperatures, with averages reaching a scorching 31°C (89°F) and maximums soaring to 40°C (104°F). This month is typically dry, experiencing no precipitation at all and a humidity level of 25%. In contrast, March presents a more moderate climate, with average temperatures dropping to 24°C (76°F) and maximums peaking at 37°C (99°F). While March does see some precipitation, it remains minimal at 7 mm (0.3 in) over just one day, and humidity is slightly lower at 21%. For a detailed comparison, check out Nizwa weather in March.
In September, the weather is notably hotter, with minimum temperatures around 23°C (73°F) and average highs reaching up to 31°C (89°F), occasionally peaking at a sweltering 40°C (104°F). The humidity is relatively low at 25%, and the month typically sees no rainfall. In contrast, April offers slightly cooler conditions, with temperatures ranging from a minimum of 16°C (62°F) to an average of 29°C (85°F), and maximums hitting 38°C (100°F). April experiences a bit more precipitation, averaging 7 mm (0.3 in) over about one day, alongside lower humidity at 19%. For more detailed information on April conditions, you can check out Nizwa weather in April.
September and May both feature warm temperatures, but May tends to be slightly hotter, with maximums reaching up to 46°C (114°F) compared to September's peak of 40°C (104°F). While September enjoys dry weather with no recorded precipitation, May experiences a little more humidity and an average of 14 mm (0.5 in) of rain over three days. The average temperatures in both months are similar, with September averaging 31°C (89°F) and May at 32°C (89°F). For more detailed information, you can visit Nizwa weather in May.
In September, temperatures range from a minimum of 23°C (73°F) to a maximum of 40°C (104°F), with an average of 31°C (89°F), while humidity levels sit at 25%. Notably, there is no recorded precipitation during this month. In contrast, June experiences slightly higher temperatures, with a minimum of 25°C (77°F) and a maximum reaching 45°C (113°F), averaging around 35°C (95°F). Although June has a higher amount of precipitation at 4 mm (0.1 in) over one day, it features lower humidity at 17%. For further details about June weather, you can visit Nizwa weather in June.
In comparing the weather between September and July, September tends to be slightly more moderate, with average temperatures reaching 31°C (89°F) compared to July's higher average of 33°C (92°F). While both months have the same minimum temperature of 23°C (73°F), July experiences more extreme highs, peaking at 43°C (109°F), whereas September's maximum is 40°C (104°F). Additionally, July is characterized by significantly more rainfall, with 21 mm (0.8 inches) spread over 6 days, while September remains dry with no recorded precipitation. Interestingly, humidity levels are higher in July at 19% compared to September's 25%. For more detailed insights, you may refer to Nizwa weather in July.
In comparison to August, September experiences slightly cooler temperatures, with an average of 31°C (89°F) compared to August’s 33°C (92°F). While both months have similar minimum temperatures of 23°C (73°F), September features a lower maximum temperature of 40°C (104°F) versus August's peak of 43°C (109°F). Additionally, September boasts significantly less precipitation, recorded at just 3 mm (0.1 in) over 0 days, compared to August’s 10 mm (0.4 in) across 3 days. Humidity remains relatively consistent, at 25% in September and slightly lower at 23% in August. For more details, you can check Nizwa weather in August.
In September, the weather is typically hotter, with minimum temperatures around 23°C (73°F) and average highs peaking at 40°C (104°F), alongside very low humidity at 25% and no recorded precipitation. In contrast, October brings milder conditions, with minimum temperatures dropping to 18°C (65°F) and average highs reaching 38°C (100°F). Additionally, October experiences increased humidity at 35% and some rainfall, totaling 18 mm (0.7 in) over two days. For more details about weather conditions during this month, visit Nizwa weather in October.
September and November present a notable contrast in weather conditions. In September, temperatures soar, with a minimum of 23°C (73°F) and maximum reaching up to 40°C (104°F), while averaging around 31°C (89°F). Humidity is relatively low at 25%, and there is minimal precipitation, recorded at just 3 mm over zero days. In contrast, November sees a significant drop in temperature, with a minimum of 14°C (57°F) and a maximum of 32°C (91°F), averaging 23°C (74°F). The humidity increases to 44%, yet precipitation remains the same at 3 mm over zero days, maintaining dry conditions. For more details, see Nizwa weather in November.
In September, the weather is characterized by high temperatures, with minimums around 23°C (73°F), averaging 31°C (89°F), and soaring up to a maximum of 40°C (104°F), all accompanied by very low humidity at 25% and virtually no rainfall. In stark contrast, December brings much cooler temperatures, with minimums dropping to 11°C (53°F) and an average of 20°C (68°F), peaking at a pleasant 31°C (88°F). Additionally, December experiences slightly higher humidity at 45% and a bit more precipitation, with an average of 5 mm (0.2 in) over one day. For more detailed insights, you can check out Nizwa weather in December.
As summer gradually transitions to autumn, September in Nizwa brings a shift in weather that stands out from the sweltering months preceding it. The average temperatures remain warm, but notably, there’s a blend of highs that can still reach around 40°C and lows that dip to a more tolerable 23°C. With an impressively low humidity of 25% and negligible precipitation, visitors can enjoy mostly dry and sunny days, perfect for exploring the captivating landscapes and rich heritage of the region. This month sets the stage for a more comfortable outdoor experience compared to the hotter summer days. For a deeper understanding of the weather trends throughout the year, check out Nizwa Climate.