Last updated: February 24, 2025
Discover the vibrant September weather of Las Vegas, United States, where the desert sunshine reigns supreme. With temperatures soaring to a maximum of 42°C (108°F) and a pleasant average of 27°C (80°F), it's a perfect time to bask in the warmth. Nighttime brings a refreshing coolness, dipping to a minimum of 8°C (47°F). Rainfall is minimal, with only 3 mm (0.1 in) recorded over a single day, making the humidity levels of 43% feel comfortably mild. Whether you're exploring the Strip or lounging by a pool, September's weather is a delightful invitation to experience all that Las Vegas has to offer!
In Las Vegas, September marks a delightful transition from the relentless summer heat to milder autumn temperatures. With minimums averaging around 8°C (47°F) and averages soaring to 27°C (80°F), the city experiences a welcome drop from the peak summer highs. Daytime temperatures can still reach a steamy 42°C (108°F), ensuring that sun seekers can enjoy the outdoors, but nights become notably cooler, perfect for evening strolls along the Strip. This blend of warm days and cooler nights creates an ideal atmosphere for both tourists and locals, setting the stage for vibrant nights filled with entertainment and adventure. As summer fades, September's temperatures invite visitors to experience the best of what Las Vegas has to offer.
In September, Las Vegas experiences a notable decline in precipitation, averaging just 3 mm (0.1 in) over a single rainy day. This month marks one of the driest periods of the year, following a relatively moist summer, with July and August recording 16 mm and 10 mm respectively. Despite enjoyable late-summer temperatures, the scarcity of rainfall signifies a transition into the more arid months ahead. This pattern of minimal precipitation continues into October, maintaining the trend of dryness that characterizes the desert climate of Las Vegas. Overall, September's limited rain reinforces the city's reputation as a sun-drenched oasis, preparing residents for the upcoming months of even lower moisture levels.
As summer fades into autumn, September in Las Vegas offers a noticeable shift in humidity levels. With an average humidity of 43%, it represents a slight uptick from the blistering low of 29% seen in August. This transition reflects the city's dry desert climate, where humidity steadily decreases from January’s high of 81% to its summer lows. As temperatures start to cool, residents and visitors alike can relish the more moderate conditions, which pave the way for the upcoming months of October and November, where humidity starts to rise again. This dynamic rhythm of humidity throughout the year not only shapes the environment but also influences outdoor activities and the overall comfort in the city.
As summer fades into fall, the UV Index in Las Vegas maintains a very high level of intensity in September, registering at 10. This indicates that even though the scorching days of July and August have passed, sun safety remains a priority, with a burn time of just 15 minutes for unprotected skin. The trend of increasing UV exposure from the earlier months is evident; it peaks during the summer but remains significant in early autumn. As the month progresses, the UV Index begins to decline, hinting at the milder conditions in October. To stay informed about UV conditions and stay safe in the sun, check out Las Vegas UV Index.
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As summer fades, September in Las Vegas transitions into a season of golden sunshine, offering a remarkable 324 hours of bright, clear days. This month reflects a slight decline from the sun-soaked peaks of July and August, which basked in a stunning 381 and 363 hours of sunlight, respectively. Nevertheless, September's ample hours still surpass the winter months, showcasing a comforting warmth that lingers. With daylight gradually dwindling, the city's vibrant energy persists, making it an ideal time for outdoor adventures and late summer events under the clear desert sky. As the year progresses, September stands out, balancing the high summer radiance with a hint of autumn's approach, inviting visitors to revel in its glorious sunshine.
As September rolls around in Las Vegas, the desert sun shows its true colors with an impressive 88% chance of sunny weather. This marks a noticeable increase compared to the summer months of July and June, where the sunny outlook dips to 55% and 70%, respectively. The trend of late summer and early autumn demonstrates that Las Vegas experiences some of its most favorable weather in September, making it an ideal time for visitors to enjoy outdoor activities under the brilliant blue skies. With a steady decline in cloud cover leading into autumn, September stands out as a golden opportunity for sun-soaked experiences in this vibrant city.
As summer gives way to autumn in Las Vegas, September witnesses a gentle decline in daylight hours, settling at 12 hours. This marks a transition from the peak summer months, where the days stretched to 14 hours in June, July, and August. With each passing month, the daylight gradually retreats, reflecting the changing seasons. The longer evenings of autumn provide a charming backdrop for outdoor activities, as residents and visitors alike savor the lingering warmth before the days shorten further into fall. This gradual ebb of daylight, from 14 hours in height to 12 in September, encapsulates the shift towards the cozy embrace of autumn, making Las Vegas a delightful destination during this time of year.
As September gently sweeps into Las Vegas, the average wind speed settles at a refreshing 2.6 m/s (6 mph), creating a subtle breeze that contrasts the sizzling summer months. This slight dip from the summer highs reflects a seasonal transition, with July witnessing the lowest winds at 2.2 m/s (5 mph). Interestingly, the wind starts to pick up again, mirroring the shift from the heat of July and August to the cooler embrace of autumn. Overall, September's winds carry hints of change, echoing the gradual decline of summer and heralding the crisp brilliance of fall just around the corner.
The weather in Las Vegas 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 Las Vegas and find detailed weather information for every month.
In September, the weather in Las Vegas is characterized by high temperatures, with an average of 27°C (80°F) and peak highs reaching up to 42°C (108°F). With minimal precipitation of just 3 mm (0.1 in) over the course of a single day, the humidity remains relatively low at 43%, making it a warm and dry month.
Conversely, January brings a drastic shift in conditions. The average temperature drops to 7°C (46°F), with nighttime lows plummeting to -5°C (24°F) and daytime highs capping at 20°C (68°F). January is much wetter, with 22 mm (0.8 in) of rain over about three days, and the humidity rises significantly to 81%, creating a much cooler and more humid climate.
For more detailed information on the weather in January, you can visit Las Vegas weather in January.
September and February exhibit starkly contrasting weather patterns. In September, temperatures can soar, with averages around 27°C (80°F) and maximums reaching up to 42°C (108°F). The month is relatively dry, with only 3 mm of precipitation over just one day and a humidity level of 43%. In contrast, February is considerably cooler, with average temperatures of 9°C (48°F) and highs peaking at 24°C (75°F). This month experiences more substantial rainfall, totaling 25 mm over four days, and a notable increase in humidity at 84%. For a detailed overview, visit Las Vegas weather in February.
In September, the weather is characterized by warm conditions, with average temperatures reaching a balmy 27°C (80°F) and highs peaking at 42°C (108°F). Rainfall is minimal, with just 3 mm over approximately one day, and humidity levels are relatively low at 43%. In contrast, March presents cooler temperatures, with averages around 13°C (55°F) and maximums of 30°C (87°F). This month is also wetter, receiving 21 mm of precipitation over four days, and the humidity is notably higher at 76%. For more detailed information, you can check Las Vegas weather in March.
In September, the weather is characterized by much warmer temperatures, with a minimum of 8°C (47°F) and an average soaring to 27°C (80°F), peaking at a scorching 42°C (108°F). The month experiences very little precipitation, averaging just 3 mm over one day, and the humidity remains relatively low at 43%. In contrast, April sees cooler temperatures, with a minimum of 2°C (36°F) and an average of 18°C (65°F), reaching a maximum of 34°C (94°F). Although April is slightly wetter, with 6 mm of rainfall over two days, it also has higher humidity levels at 64%. For more detailed information, you can check Las Vegas weather in April.
When comparing the weather of September and May, notable differences emerge. September boasts a higher average temperature of 27°C (80°F) and can reach maximums of 42°C (108°F), making it generally warmer than May, which has an average of 22°C (72°F) and upper limits of 39°C (102°F). Additionally, September experiences very little rainfall, with only 3 mm (0.1 in) on a single day, while May sees slightly more precipitation, totaling 10 mm (0.4 in) over two days. Humidity levels do differ as well, with September at 43% and May a bit higher at 48%. For more detailed insights, refer to Las Vegas weather in May.
In comparing the weather between September and June, both months experience warm conditions, though September tends to showcase a wider temperature range. In June, temperatures range from a minimum of 12°C (54°F) to a maximum of 43°C (110°F), with an average of 29°C (85°F) and minimal precipitation at just 1 mm (0.0 in) over 0 days, contributing to a humidity level of 40%. Conversely, September presents a slightly broader temperature spectrum, with lows of 8°C (47°F) and highs reaching up to 42°C (108°F), while maintaining an average temperature of 27°C (80°F). This month also experiences very low precipitation levels at 3 mm (0.1 in), over just 1 day, and slightly higher humidity at 43%. For a closer look at June's weather specifics, you can visit Las Vegas weather in June.
September experiences a wider range of temperatures compared to July, with a minimum of 8°C (47°F) and a maximum reaching up to 42°C (108°F). In contrast, July is generally warmer, averaging 32°C (89°F), with a higher minimum of 18°C (64°F) and a maximum temperature of 44°C (111°F). Precipitation is much lower in September, with only 3 mm (0.1 in) over 1 day, while July sees more rainfall at 16 mm (0.6 in) across 4 days. Interestingly, September also has higher humidity at 43% compared to July's 33%. For more details on July's weather patterns, visit Las Vegas weather in July.
In comparing the weather between August and September, we see notable differences in temperature and humidity. September experiences a cooler minimum temperature of 8°C (47°F), while August sees a much warmer minimum of 20°C (67°F). The average temperatures also reflect this shift, with September averaging 27°C (80°F) compared to August's warmer 31°C (88°F). Both months have the same maximum temperature of 42°C (108°F), indicating potential heat spikes, but September records significantly less precipitation at only 3 mm (0.1 in) over 1 day, while August has 10 mm (0.4 in) spread over 2 days. Additionally, September’s humidity is higher at 43%, compared to August’s lower level of 29%. For further details on August weather, you can refer to Las Vegas weather in August.
In September, the weather is notably warm, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 42°C (108°F), resulting in an average temperature of 27°C (80°F). The precipitation is minimal, with only 3 mm (0.1 in) over just one day and humidity sitting at 43%. In contrast, October sees a significant drop in nighttime temperatures, with lows plummeting to -1°C (31°F), and an average of 18°C (65°F) during the day, peaking at 35°C (95°F). Despite similar rainfall levels of 3 mm (0.1 in) over one day, October experiences higher humidity at 61%. For more details on the specific weather patterns, you can check Las Vegas weather in October.
In September, the weather is characterized by warm temperatures, with a minimum of 8°C (47°F) and an average high of 27°C (80°F), peaking at a scorching 42°C (108°F). The month is typically dry, receiving only 3 mm (0.1 in) of precipitation, and the humidity is relatively low at 43%. In contrast, November experiences much cooler conditions, with temperatures ranging from a chilly -2°C (29°F) at night to a maximum of 28°C (82°F) during the day, and an average of 13°C (55°F). It also sees increased precipitation, totaling 13 mm (0.5 in) despite having the same number of rainy days as September. Additionally, the humidity rises significantly to 76%, making November feel much wetter and colder than September. For further insights into November weather patterns, you can visit Las Vegas weather in November.
September in Las Vegas boasts significantly warmer temperatures, with daily averages around 27°C (80°F) and highs soaring up to 42°C (108°F). The month experiences minimal precipitation, with only about 3 mm (0.1 in) and just a single rainy day, resulting in relatively low humidity at 43%. In contrast, December brings much cooler weather, with average temperatures dropping to about 7°C (45°F) and maximums reaching 23°C (73°F). This month also sees increased precipitation, totaling around 18 mm (0.7 in) over four rainy days, coupled with much higher humidity levels at 78%. For more insights on the winter climate, check Las Vegas weather in December.
As the sizzling summer months give way to September, Las Vegas experiences a delightful transition that sets it apart from the sweltering heat of July and August. With a comfortable average temperature allowing for pleasant outdoor activities, September enjoys a notable reduction in humidity, making the evenings particularly enjoyable. The month offers only a glimpse of rain, with just a single day of precipitation, ensuring that visitors can relish clear skies and warm sunshine. This unique blend of warmth and reduced humidity provides an ideal backdrop for exploring the vibrant city, creating a perfect time to visit. For a deeper understanding of what to expect throughout the year, check out the comprehensive details on Las Vegas Climate.