Last updated: August 31, 2025
Experience the intense September weather of Riyadh, Saudi Arabia, where temperatures soar with a maximum of 45°C (113°F) and an average of 34°C (94°F). The city basks in the warmth, with nighttime temperatures dipping to a mild 21°C (70°F). In this arid climate, precipitation is virtually nonexistent, recording a striking 0 mm over the month, which means no rainy days to disrupt the relentless sunshine. With a humidity level resting at a comfortable 18%, the dry heat creates a distinct atmosphere, ideal for enjoying outdoor activities while staying hydrated.
In September, Riyadh experiences a noticeable transition as summer lingers on, with temperatures still reaching impressive heights. The month kicks off with a minimum of 21°C (70°F), while average daily temperatures hover around 34°C (94°F), peaking at a sweltering 45°C (113°F). This contrast marks a gradual decline from the extreme heat of the preceding months, where July and August consistently flirted with the highest temps. Yet, September still demands respect, as the heat can feel intense during the day. As the season shifts towards autumn, cooler evenings provide a refreshing respite, setting the stage for the mild and pleasant temperatures that October promises.
In Riyadh, Saudi Arabia, the month of September marks a continuation of the dry spell that characterizes the summer. With a total precipitation of 0 mm and no recorded rainy days, September aligns with the region's typical arid climate, where the summer heat prevails unobstructed. This trend of low rainfall is a stark contrast to the wetter months earlier in the year, such as February, which sees significantly more precipitation. As the calendar shifts toward the fall, Riyadh remains largely dry, reflecting its desert environment and offering a glimpse into the seasonal patterns of aridity that define this vibrant city.
In September, Riyadh experiences a noticeable drop in humidity, with levels settling at 18%. This figure harks back to the even lower readings found in the scorching summer months of July and August, where humidity plummeted to 13% and 15% respectively. As the city transitions from the oppressive heat of summer towards the milder fall, September marks a slight rise from the intense dryness, yet it remains one of the driest months in the year. Observing the broader trend, it is clear that humidity begins to increase again after September, eventually peaking in the cooler months of November and December, where levels climb to 43% and 46%. Thus, September serves as a pivotal month in Riyadh's climate, ushering in the gradual shift towards more humid conditions in the latter part of the year.
As summer transitions into fall, the UV Index in Riyadh remains notably high in September, recording an extreme level of 11 with a burn time of just 10 minutes. This level mirrors the intense UV exposure seen in the preceding months of June and July, showcasing a trend of relentless sun intensity as the city moves toward cooler temperatures. Despite a slight dip from May’s peak of index 12, September still poses significant risks for unprotected skin. It's essential for residents and visitors to remain vigilant against sun exposure, making proactive measures crucial. For further insights into Riyadh's UV conditions throughout the year, visit Riyadh UV Index.
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As September rolls into Riyadh, the city enjoys 336 hours of sunlight, a slight dip from the peak summer months but still a glorious amount compared to the colder seasons. The consistent rise in daylight from January's 243 hours peaks in July with an impressive 376 hours, showcasing Riyadh's vibrant and sun-drenched summer. In September, the lingering warmth hints at a transition, as the sun still shines brightly before gradually yielding to the cooler October days, which provides 328 hours of sunshine. This trend highlights Riyadh's enduring sunshine, making September a delightful time to embrace the outdoor culture and activities before the shift towards the milder months.
In Riyadh, Saudi Arabia, September shines brightly with a remarkable 96% chance of sunny weather, making it one of the sunniest months of the year. This trend continues a streak of excellent sunlight from the summer months, where June leads the chart at 97%. Following the intense heat of July and August, September maintains a high likelihood of sunshine, providing residents and visitors alike with ample opportunities to enjoy outdoor activities. As the month transitions to fall, the consistent sunshine levels are part of a broader pattern that reflects Riyadh's predominantly sunny climate year-round, with only the winter months seeing a dip, highlighting the city's arid allure.
As September arrives in Riyadh, the city enjoys 12 hours of daylight, marking a slight drop from the peak summer months. This gradual decrease signals the transition from long, sun-drenched days to shorter ones, as daylight hours begin to recede after the relentless heat of July and August, which also boasts 13 hours of sunshine. Following this pattern, daylight durations gently decline through the autumn months, settling at 11 hours in October and continuing to shrink towards the winter. This rhythmic ebb and flow of sunlight not only influences daily activities but also beautifully reflects the shifting seasons in the heart of Saudi Arabia.
In September, Riyadh experiences a gentle shift in wind patterns, with an average wind speed of 3.8 m/s (approximately 9 mph), marking a slight increase from the summer's consistent 3.5 m/s. This subtle rise sets the stage for a transition into autumn, as the winds begin to whisper hints of cooler days ahead. Throughout the year, wind speeds in Riyadh show some variability, peaking in March and June at 4.7 m/s, before gradually tapering off in the later months. The September breeze, though mild, is a refreshing reminder of nature’s cyclical rhythm, heralding the impending change in the desert city's atmosphere.
Weather in Riyadh varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Riyadh, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, Riyadh experiences scorching temperatures, with an average high of 34°C (94°F) and peaks reaching a blistering 45°C (113°F). The humidity is quite low at just 18%, and there is no recorded precipitation during the month. In stark contrast, January brings a much cooler climate, with average temperatures around 15°C (60°F) and maximums of 30°C (86°F). The humidity increases to 41%, and while there is minimal precipitation of 4 mm (0.2 in), it remains relatively dry. For more detailed information on January weather in Riyadh, you can visit Riyadh weather in January.
September and February showcase stark contrasts in weather conditions. September boasts scorching temperatures, with a minimum of 21°C (70°F), an average high of 34°C (94°F), and peaks reaching a blistering 45°C (113°F), all under clear skies and low humidity at 18%. In contrast, February offers a much cooler climate, with temperatures dipping to a minimum of -1°C (31°F), an average of 17°C (63°F), and a maximum of 35°C (95°F). Additionally, February experiences some precipitation, with 14 mm (0.6 in) over three days and higher humidity levels at 29%. For more detailed information, check out Riyadh weather in February.
In September, Riyadh experiences sweltering temperatures, with minimums around 21°C (70°F) and maximums soaring to 45°C (113°F), making it the hottest month of the year. The humidity is low at 18%, and it sees no precipitation, resulting in a dry and scorching climate. In contrast, March offers a more temperate environment with minimums of 7°C (46°F) and maximums reaching 38°C (101°F). Although warmer than September, it has an average temperature of 22°C (73°F) and experiences some humidity at 29%, along with light precipitation of 5 mm over just one day. For a detailed look at the weather in March, check out Riyadh weather in March.
In comparing the weather of September and April, September emerges as the hotter month with average temperatures peaking at 34°C (94°F) and reaching highs of 45°C (113°F), while April offers a milder climate with average temperatures around 28°C (82°F) and a maximum of 40°C (104°F). Notably, September experiences no precipitation, maintaining an extremely low humidity level of 18%, whereas April sees some rainfall, with 10 mm over 2 days and higher humidity at 33%. Overall, while September is characterized by intense heat and dryness, April provides a more balanced and comfortable, albeit slightly wetter, atmosphere. For more detailed information, you can explore Riyadh weather in April.
In September, Riyadh experiences high temperatures with a minimum of 21°C (70°F), an average of 34°C (94°F), and a scorching maximum of 45°C (113°F). The month is characterized by dry conditions, with no recorded precipitation and humidity at a low 18%. In contrast, May has slightly cooler temperatures, with a minimum of 20°C (67°F), an average of 33°C (91°F), and a maximum of 44°C (112°F). Although the overall temperatures are similar, May does see a small amount of precipitation at 3 mm (0.1 in) and has a higher humidity level of 27%. For more detailed information about the weather conditions in this month, you can check Riyadh weather in May.
In June, the weather in Riyadh tends to be hotter than in September, with average temperatures peaking at 36°C (98°F) and maximums reaching up to 46°C (116°F). In comparison, September sees slightly lower averages at 34°C (94°F), with maximums hitting 45°C (113°F). Both months experience dry conditions with zero precipitation, but June has a marginally higher humidity level of 19% compared to September's 18%. For more details, you can check Riyadh weather in June.
In comparing the weather between September and July, September offers slightly lower temperatures, with a minimum of 21°C (70°F) and an average of 34°C (94°F), compared to July's higher minimum of 27°C (81°F) and average of 38°C (100°F). However, both months experience extreme heat, with July peaking at a maximum of 47°C (117°F), slightly surpassing September's maximum of 45°C (113°F). Both months exhibit dry conditions, recording no precipitation and humidity levels of 18% in September and 13% in July, making them quite arid. For a more detailed look at July's weather in Riyadh, visit Riyadh weather in July.
In September, the weather in Riyadh shows a slight decrease in temperatures compared to August, with minimum temperatures around 21°C (70°F) and average highs reaching 34°C (94°F), compared to August's higher minimum of 26°C (78°F) and an average maximum of 37°C (99°F). Both months experience no precipitation, making for dry conditions with humidity levels slightly higher in September at 18%, compared to August's 15%. Interestingly, despite September being cooler overall, August reaches its peak highs at 47°C (117°F) compared to September’s maximum of 45°C (113°F). For more detailed information about August weather, check Riyadh weather in August.
September in Riyadh is characterized by sweltering heat, with temperatures ranging from a minimum of 21°C (70°F) to a scorching maximum of 45°C (113°F), and an average temperature of 34°C (94°F). The month experiences no precipitation and low humidity at 18%. In contrast, October sees a noticeable drop in temperatures, with a minimum of 15°C (60°F), an average of 29°C (84°F), and a maximum of 41°C (105°F). While October remains dry with only 1 mm of precipitation recorded, humidity increases to 28%, creating a more comfortable atmosphere compared to the extreme conditions of September. For more detailed insights, you can visit Riyadh weather in October.
September in Riyadh is characterized by intense heat, with temperatures ranging from a minimum of 21°C (70°F) to a scorching maximum of 45°C (113°F). The month experiences no precipitation, leading to extremely low humidity levels of just 18%. In contrast, November brings a noticeable shift in weather, with milder temperatures that range from a minimum of 6°C (44°F) to an average of 22°C (71°F), peaking at 35°C (95°F). Unlike September, November sees some rainfall, with 9 mm (0.3 in) recorded over two days, and humidity increases to 43%, providing a more comfortable atmosphere. For more details, check out Riyadh weather in November.
September in Riyadh is characterized by sweltering heat, with average temperatures soaring around 34°C (94°F) and potentially reaching a scorching 45°C (113°F). The month is dry, with no recorded precipitation and a low humidity level of just 18%. In contrast, December offers a much cooler climate, with average temperatures dropping to a mild 17°C (62°F) and a maximum of 29°C (85°F). This month also sees some moisture, receiving about 6 mm (0.2 in) of rainfall over one day, and the humidity rises to a more comfortable 46%. For a detailed look at the weather specifics for December, check out Riyadh weather in December.
As September unfolds in Riyadh, residents and visitors alike can expect sweltering heat with peak temperatures often soaring around 45°C (113°F), making it one of the hottest months of the year. This month marks a transition where the intense summer heat begins to slightly ease, but still maintains an average of 34°C (94°F), ensuring that the warmth lingers for those venturing outdoors. With zero precipitation and a notably low humidity level of 18%, the air remains exceptionally dry, further emphasizing the arid conditions typical of autumn in the region. For a detailed understanding of the climate throughout the year, check out Riyadh Climate.