Last updated: February 24, 2025
Experience the dynamic weather of Scottsdale, Arizona in September, where temperatures soar with a maximum of 45°C (113°F) yet tend to stabilize around an average of 32°C (89°F). The month showcases a blend of warm days and cool nights, plunging to a refreshing minimum of 13°C (56°F). Despite the heat, locals and visitors should prepare for the occasional rainfall, with a total precipitation of 27 mm (1.1 inches) occurring across just 3 days. The humidity levels hover around 64%, adding a touch of tropical flair to the desert's arid charm. Whether basking in the sun or enjoying a rare rain shower, September in Scottsdale offers an invigorating experience!
In September, Scottsdale experiences a noticeable transition as summer begins to ease its grip. With minimum temperatures around 13°C (56°F), the cooler nights offer a refreshing respite from the sweltering days, which can reach up to 45°C (113°F). The average temperature sits comfortably at 32°C (89°F), striking a balance between the lingering warmth of summer and the forthcoming chill of fall. This month signifies a gradual shift, as daytime highs start to dip after the extreme heat of July and August, yet the desert sun still ensures plenty of warmth to enjoy outdoor activities. As September progresses, visitors can relish in the vibrant golden hues of late summer, making it an ideal time to explore Scottsdale’s stunning landscapes and attractions.
In September, Scottsdale experiences 27 mm (1.1 in) of precipitation, marking it as a transitional month in the desert climate. Generally, the city enjoys a dry spell during the summer, but with 3 days of rain, September sees a slight uptick in moisture compared to the preceding months. This marks an end to the arid summer, as the summer's heavier downpours in July (37 mm) and August (39 mm) give way to a more moderate, yet refreshing, autumn climate. The rainfall, while less than in the peak summer months, contributes to the seasonal change and rejuvenates the landscape, setting the stage for the cooler temperatures of fall. As the year progresses, a gradual decline in precipitation is observed, with October dropping to 26 mm (1.0 in), reflecting Scottsdale's expected transition into drier months ahead.
As the summer heat begins to wane, September in Scottsdale sees a noticeable increase in humidity, rising to 64% after the drier months of June and July, which hover around 33%. This transitional month marks a shift as conditions become more comfortable compared to the intense dryness of summer, yet still remain lower than the winter months when humidity levels soar to 76% in January and 82% in December. Overall, the data reveals a clear pattern: humidity levels peak in the colder months, while the summer months offer relief with their drier air, leading to a refreshing backdrop for outdoor activities in September as the region slowly heads into fall.
Throughout September in Scottsdale, the UV Index remains high at 10, marking the end of an intense summer but still requiring caution. As temperatures start to cool, the risk of overexposure remains significant with a burn time of just 15 minutes. This trend showcases a tapering off from the extreme levels seen in the summer months, reflecting a shift to very high exposure. Interestingly, while September offers relief from the peak summer sun, the need for sun safety continues as local residents and visitors enjoy the lingering warmth of early fall. For more information on the UV Index throughout the year, check out Scottsdale UV Index.
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As summer gently transitions into fall, September in Scottsdale offers a splendid average of 315 sunshine hours, maintaining the city's reputation for abundant sunlight. This month showcases a slight decline from the peak hours experienced in May and June, yet it remains robust compared to the earlier months of the year. The consistent trend of sun-soaked days throughout the summer continues to bless the desert, inviting locals and visitors alike to enjoy the lingering warmth with outdoor activities. While the days grow shorter and the temperatures begin to cool, September is a vibrant reminder of Scottsdale’s long, sunlit days that linger just a little longer before the autumnal shift.
When considering the likelihood of sunny weather in September in Scottsdale, Arizona, the month boasts a solid 70% chance of sunshine. This places September in a favorable position, slightly above the summer averages, where June experiences a 72% chance, while July drops to a mere 36%. As the season transitions from the intense summer heat, September’s sunny outlook mirrors the optimism of spring with April and October both hitting 76%. It's interesting to note that the transition from summer to fall maintains a good probability for beautiful weather, making September an attractive month for outdoor activities in this sun-soaked destination.
As September unfolds in Scottsdale, the desert sun grants its inhabitants 12 hours of daylight, reflecting a gentle transition from the long, sun-drenched days of summer. This month marks a gradual decline from the peak of 14 hours in June and July, as daylight begins to shorten toward the cooler months ahead. Interestingly, while September may showcase less light than the height of summer, it still offers a generous amount compared to the earlier winter months, like January and December, which dip to just 10 hours and 9 hours, respectively. The rhythm of daylight changes throughout the year not only signals the changing seasons but also invites residents to relish the softer, golden hues of autumn as they prepare for the coming winter chill.
As summer transitions to fall, September in Scottsdale brings a noticeable shift in wind patterns. With an average wind speed of 1.8 m/s (4 mph), it's the calmest month of the year, following a series of slightly more robust breezes. The wind typically strengthens in the spring and early summer, peaking in April and June at 2.8 m/s (6 mph), before gradually tapering off. This gentler wind, coupled with the fading heat, creates a serene atmosphere that sets the stage for pleasant outdoor activities. As September winds down, residents can enjoy the tranquility of the desert landscape, making it an ideal time for evening strolls and gatherings under the stars.
The weather in Scottsdale changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Scottsdale and find detailed weather information for every month.
In September, temperatures soar with minimums around 13°C (56°F) and averages peaking at a sweltering 32°C (89°F), while max temperatures can reach a blistering 45°C (113°F). This month typically sees a modest amount of rainfall, with about 27 mm (1.1 in) falling over just 3 days and humidity around 64%. In contrast, January offers a dramatic cool down, with minimum temperatures dipping to -1°C (30°F) and an average of 12°C (54°F). The maximum temperature in January is a milder 29°C (84°F), accompanied by slightly lower precipitation of 25 mm (1.0 in) spread across 4 days and higher humidity levels at 76%. For more details, check Scottsdale weather in January.
In September, temperatures soar with a minimum of 13°C (56°F) and an average high of 32°C (89°F), peaking at a scorching 45°C (113°F). The month experiences relatively low precipitation of 27 mm (1.1 in) over three days, coinciding with a humidity level of 64%. In contrast, February presents a much cooler climate, with temperatures ranging from a minimum of 1°C (33°F) to an average of 14°C (57°F) and a maximum of 29°C (84°F). This month sees slightly higher precipitation at 37 mm (1.4 in) over the same three days, coupled with elevated humidity levels of 79%. For more detailed insights, refer to Scottsdale weather in February.
September and March present strikingly different weather conditions. In September, temperatures can soar to a maximum of 45°C (113°F), though the average temperature remains high at 32°C (89°F), making it one of the hottest months. In contrast, March sees milder temperatures with highs around 35°C (95°F) and an average of 18°C (65°F), providing a more comfortable environment. Both months experience a similar amount of precipitation, with September receiving 27 mm (1.1 in) and March slightly higher at 29 mm (1.2 in), but the humidity in September stands at 64%, just below March’s 67%. For a closer look at the weather specifics, check out Scottsdale weather in March.
When comparing September and April weather, significant differences emerge. September boasts higher temperatures, with minimums around 13°C (56°F), averages reaching 32°C (89°F), and maximums soaring to 45°C (113°F). In contrast, April offers more moderate conditions, starting at a minimum of 8°C (47°F) and averaging 24°C (75°F), peaking at 39°C (103°F). Additionally, September experiences more precipitation, with about 27 mm (1.1 in) over three days, while April is remarkably dry with only 1 mm (0.1 in) of rainfall over the entire month and no rainy days at all. Humidity also plays a role, being slightly higher in September at 64% compared to 55% in April. For those interested in more detailed insights, check out Scottsdale weather in April.
In comparing the weather between September and May, September tends to be significantly hotter, with average temperatures reaching up to 32°C (89°F) and maximum highs soaring to 45°C (113°F). In contrast, May experiences slightly milder temperatures, averaging 28°C (82°F) with a high of 43°C (109°F). Additionally, September sees more humidity at 64% and some precipitation, averaging 27 mm over three days, while May enjoys dry conditions with virtually no rain and a lower humidity level of 40%. For a closer look at the specifics of May weather, you can visit Scottsdale weather in May.
In September, temperatures range from a comfortable 13°C (56°F) at night to a scorching 45°C (113°F) during the day, making it slightly hotter than June. However, September experiences more humidity at 64%, giving the heat a more oppressive feel, alongside an average precipitation of 27 mm (1.1 in) over three days. In contrast, June showcases even higher maximum temperatures peaking at 48°C (119°F) but with significantly lower humidity at 33% and virtually no rain, as indicated by the lack of precipitation over the month. For a more detailed look at the weather patterns, you can check Scottsdale weather in June.
In comparing the weather in September and July, September tends to be slightly cooler with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 45°C (113°F), while in July, temperatures are consistently higher, with a minimum of 23°C (74°F) and a maximum of 47°C (118°F). The average humidity in September is also higher at 64%, compared to July's 34%, making September feel more humid despite slightly fewer precipitation days (3 days in September versus 6 days in July). Overall, July is hotter and drier, with a total precipitation of 37 mm (1.4 in), while September sees less rainfall at 27 mm (1.1 in). For more details on July's weather, check out Scottsdale weather in July.
When comparing the weather in September to that of August, notable differences emerge. September typically experiences a lower minimum temperature of 13°C (56°F) compared to August's warmer 22°C (73°F), resulting in a more comfortable start to the day. However, September's average temperature is slightly lower at 32°C (89°F) versus August's higher average of 35°C (95°F). Additionally, September sees a maximum temperature of 45°C (113°F), which is marginally cooler than August's peak of 47°C (116°F). Rainfall also shifts, with September receiving less precipitation at 27 mm (1.1 in) over three days, while August totals 39 mm (1.5 in) over five days. Interestingly, humidity levels increase in September to 64%, compared to August's 48%. For more detailed information, you can explore Scottsdale weather in August.
In September, temperatures soar with averages around 32°C (89°F), peaking at a sweltering 45°C (113°F), while the minimum stays relatively warm at 13°C (56°F). The month sees minimal rainfall of 27 mm (1.1 in) over three days and a humidity level of 64%. In contrast, October brings a noticeable drop in temperatures, with averages cooling to 24°C (76°F) and highs reaching 41°C (105°F). The minimum temperature in October further decreases to 7°C (45°F), and the precipitation remains similar at 26 mm (1.0 in) over just two days, accompanied by a slight increase in humidity to 67%. For more detailed information, check out Scottsdale weather in October.
In September, the weather is significantly warmer, with average temperatures reaching around 32°C (89°F) and maximums soaring up to 45°C (113°F). The month is characterized by relatively low precipitation, totaling 27 mm (1.1 in) over about 3 days, and the humidity sits at 64%. In contrast, November brings a much cooler climate, where the average temperature drops to 18°C (66°F) with a maximum of 36°C (97°F) and a minimum dipping to 5°C (41°F). This month experiences less rainfall, with only 21 mm (0.8 in) recorded across just 1 day, while humidity rises to 77%. For more detailed insights about November weather, you can check Scottsdale weather in November.
In September, the weather is characterized by extreme heat, with average temperatures reaching a sweltering 32°C (89°F) and highs peaking at 45°C (113°F). This month also experiences a moderate amount of humidity at 64%, along with a low level of precipitation, totaling 27 mm (1.1 in) over just three days. In contrast, December presents a much cooler climate, where temperatures drop significantly, with average highs of only 13°C (55°F) and a maximum of 28°C (83°F). December’s humidity rises to 82%, and while precipitation is slightly lower at 23 mm (0.9 in), it occurs over four days, hinting at a more overcast atmosphere. For more information, you can visit Scottsdale weather in December.
As September ushers in a subtle shift in Scottsdale's weather, residents and visitors alike can expect a blend of lingering summer warmth and the first hints of cooler autumn air. While the maximum temperatures still soar, often reaching above 45°C (113°F), the average highs dip noticeably from the peak summer months, offering a more comfortable experience. This month also sees a modest uptick in humidity, making the air feel a bit heavier, although it remains manageable with only a few rainy days and minimal precipitation. With an average of 27 mm (1.1 in) of rain spread across just three days, September marks a transitional time where the desert landscape begins to hint at its vibrant autumn colors ahead. For a comprehensive look at the changing weather patterns, check out Scottsdale Climate.