Last updated: February 24, 2025
September in Vail, United States, offers a unique blend of crisp autumn transitions and lingering summer warmth. With maximum temperatures reaching a pleasant 25°C (78°F), the days invite outdoor exploration, while the average temperature sits at a cool 10°C (50°F). As the nights grow chillier, the minimum drops to a brisk -8°C (17°F), perfect for cozy evenings. Visitors can expect some rain, with precipitation amount averaging 31 mm (1.2 in) over about 5 days, contributing to the region's stunning fall foliage. The humidity level hovers around 65%, creating a refreshing atmosphere ideal for enjoying Vail's beautiful landscapes and vibrant activities.
In September, Vail experiences a remarkable transition as summer gradually gives way to autumn. The temperatures reflect this shift, with minimums around -8°C (17°F) and averages hovering near 10°C (50°F), providing a crisp yet pleasant feel to the air. As the days progress, maximum temperatures still reach a comfortable 25°C (78°F), allowing for a delightful mix of warm afternoons and cool evenings. This month stands out for its balanced climate, making it an ideal time for outdoor activities while witnessing the breathtaking transformation of fall foliage in the majestic Rocky Mountains.
In September, Vail experiences a noticeable decline in precipitation, with only 31 mm (1.2 in) of rainfall spread over a mere 5 days. This reduction marks a shift from the wetter summer months, creating a crisp and refreshing atmosphere as fall begins to set in. Following the lushness of July and August, September's drier conditions not only signal the approach of autumn but also provide a perfect backdrop for outdoor activities amidst the stunning seasonal changes. This trend of decreasing precipitation continues into October, where Vail will see an uptick to 64 mm (2.5 in), reminding residents and visitors alike that while summer draws to a close, the beauty of the Rockies persists, setting the stage for colorful foliage and scenic hikes.
As September rolls into Vail, the humidity begins to shift from the drier summer months. After hitting a low of 52% in July and 58% in June, the air starts to feel noticeably more humid, with September recording 65%. This rise marks a gentle transition toward the wetter fall season, as humidity levels steadily climb back up, reaching 76% in October. Overall, the humidity trend in Vail showcases a gradual descent through spring and summer, followed by a refreshing increase in early fall, setting the stage for the coming months. The variety in humidity throughout the year adds a dynamic quality to the region’s weather, making Vail an intriguing destination for all seasons.
In September, Vail experiences a very high UV Index of 10, with a burn time of just 15 minutes for unprotected skin. As summer transitions to fall, the UV levels slightly decrease from the intense peak months of June and July, which saw indices climbing to 14. Despite this decline, the UV exposure remains significant, highlighting the importance of sun protection even as temperatures cool. As outdoor enthusiasts flock to the stunning landscapes of Vail, it's crucial to stay mindful of UV radiation, especially during these early autumn days. For more details on UV trends throughout the year, check out Vail UV Index.
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As summer gracefully gives way to fall, September in Vail continues to bask in delightful sunshine, offering an impressive 315 hours of sunlight. This marks a slight decline from the peak warmth of June and July, which saw over 380 hours, but perfectly captures the transition into the crispness of autumn. With sunlight hours steadily rising from a winter low of 175 hours in January to the summer's abundance, September presents a balanced blend of sun-soaked days and cooler temperatures, making it an ideal time for outdoor activities. This seasonal shift not only enhances the vibrant fall foliage but also invites both locals and visitors to embrace the beauty of Vail as it prepares for the quieter months ahead.
September in Vail, United States, embraces the tail end of summer with a **notable 69% chance of sunny weather, making it one of the month's golden opportunities for outdoor enthusiasts. This increase in sunshine follows the steamy summer months, where August leads the way at 68%. As the seasons begin to shift, the sunny probabilities remain high compared to earlier months like February (37%) and March (48%). Overall, September stands out as a thriving transition point, letting visitors bask in pleasant weather while savoring the beauty of the fall landscape.
As summer gently fades into autumn in Vail, September offers a rich tapestry of daylight that signals the changing seasons. With approximately 12 hours of daylight, this month marks a slight decline from the sun-drenched days of July and August, where the sun graced the valley for a maximum of 14 hours. While the gradual shortening of days is a clear precursor to the crispness of fall, September retains a warm glow that still invites outdoor adventures. Following this month, daylight further dwindles, transitioning into the brisk, cozy atmosphere of October and November. Nature's rhythm in Vail is evident as the daylight hours dance between extremes, capturing the essence of each season beautifully.
As September rolls into Vail, the average wind speed gently tapers to 1.8 m/s (4 mph), marking a subtle shift toward the season's calm embrace. This drop from the summer's breezier days reflects a consistent trend in the late summer months, where wind speeds hover around the lower end of the spectrum. Alongside this softening of the winds, the transition into fall begins, promising a cool respite and the mesmerizing colors of autumn. The trend throughout the year shows a generally stable atmosphere, with only moderate fluctuations, highlighting Vail's serene climatic charm. As one bids farewell to summer, September’s gentle breezes invite outdoor enthusiasts to savor the tranquil beauty of this mountain paradise before the winter season sets in.
The weather in Vail 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 Vail and find detailed weather information for every month.
September and January present stark contrasts in weather conditions. In September, temperatures vary between a chilly -8°C (17°F) at night to a warm 25°C (78°F) during the day, with an average of 10°C (50°F). The month sees relatively mild precipitation at 31 mm (1.2 in) over five days and a comfortable humidity level of 65%. In contrast, January experiences far colder temperatures, dropping to a minimum of -27°C (-16°F) and averaging around -9°C (15°F), with a maximum of only 6°C (43°F). Precipitation increases to 47 mm (1.8 in) across nine days, and humidity rises significantly to 88%, adding to the winter chill. For more details on January weather, you can check Vail weather in January.
In September, the weather is typically milder, with temperatures ranging from a minimum of -8°C (17°F) to a maximum of 25°C (78°F) and an average of 10°C (50°F). This month experiences relatively less precipitation, totaling 31 mm (1.2 in) over about 5 days, alongside a humidity level of 65%. In contrast, February presents a stark shift, with much colder temperatures ranging from a minimum of -26°C (-15°F) to an average of -8°C (18°F) and a maximum of just 10°C (51°F). Precipitation increases in February to 63 mm (2.5 in) over 13 days, and humidity rises significantly to 87%. For a more detailed look at February weather, you can check Vail weather in February.
When comparing the weather in September and March, notable differences emerge. September typically presents milder conditions, with temperatures ranging from a minimum of -8°C (17°F) to a maximum of 25°C (78°F), averaging around 10°C (50°F). The month experiences relatively low precipitation at 31 mm (1.2 in) over approximately 5 days, alongside a humidity level of 65%. In contrast, March is significantly colder, with temperatures plunging to a minimum of -24°C (-12°F) and peaking at 11°C (52°F), averaging -4°C (26°F). It also sees more precipitation, totaling 70 mm (2.7 in) over 13 days, and a higher humidity level of 81%. For a closer look at what to expect, check out this link: Vail weather in March.
When comparing the weather in September and April, notable differences in temperature and precipitation patterns emerge. September typically features milder temperatures, with minimums around -8°C (17°F) and average highs reaching up to 25°C (78°F), making it much warmer than April, which experiences an average temperature of -1°C (31°F) and a maximum of only 13°C (56°F). Additionally, September has lower precipitation levels at 31 mm (1.2 in) over about five days, contrasting sharply with April’s 75 mm (3.0 in) spread over 13 days, indicating a wetter month. Humidity is slightly higher in April at 76%, compared to 65% in September, contributing to a different feel of the weather as the seasons change. For more detailed insights into April weather, you can check this link: Vail weather in April.
In comparing the weather of September and May, September generally presents warmer temperatures, with a minimum of -8°C (17°F) and an average of 10°C (50°F), peaking at 25°C (78°F). Conversely, May is cooler, featuring a minimum of -13°C (8°F) and an average of 3°C (38°F), with a maximum temperature of 21°C (70°F). Additionally, September experiences less precipitation, with 31 mm (1.2 in) of rain over 5 days, compared to May’s 69 mm (2.7 in) over 11 days. Humidity levels remain relatively similar, with September at 65% and May slightly higher at 66%. For those interested in more detailed insights, you can check this link: Vail weather in May.
In comparing the weather between September and June, we observe that both months have similar average temperatures, hovering around 10°C (50°F). However, June typically experiences slightly higher maximum temperatures, reaching up to 27°C (80°F), compared to September's max of 25°C (78°F). Precipitation levels are also noteworthy; June has a bit higher rainfall, with 36 mm (1.4 in) over approximately 7 days, whereas September records 31 mm (1.2 in) across 5 days. Additionally, September has a higher humidity level of 65%, compared to June's 58%. For more information about weather conditions during this month, check out this link: Vail weather in June.
In comparison to July, September experiences a slightly wider temperature range, with minimums dropping to -8°C (17°F) while still occasionally peaking at a maximum of 25°C (78°F). The average temperature in September is a cooler 10°C (50°F), contrasted with July’s 14°C (58°F). Additionally, September tends to be less humid, averaging 65% compared to July's 52%, though it does see slightly less precipitation at 31 mm (1.2 in) over 5 days, compared to July's 41 mm (1.6 in) over 10 days. For more detailed information, check out Vail weather in July.
In September, the weather becomes notably cooler compared to August, with average temperatures dropping from 14°C (57°F) in August to 10°C (50°F) in September. The maximum temperature is slightly lower as well, peaking at 25°C (78°F) in September compared to 26°C (79°F) in August. Precipitation in September is slightly less, with 31 mm (1.2 in) over 5 days, while August experiences 35 mm (1.4 in) across 8 days. Additionally, September's humidity is higher at 65%, compared to August's 56%. For more detailed information on August weather, check out Vail weather in August.
September weather is marked by milder temperatures, with averages around 10°C (50°F) and max temperatures reaching up to 25°C (78°F). In contrast, October brings a noticeable drop in temperature, with average highs of only 1°C (34°F) and minimums dropped drastically to -24°C (-11°F). September experiences less precipitation at 31 mm (1.2 in) over 5 days, whereas October sees nearly double that amount, totaling 64 mm (2.5 in) over 10 days. The humidity also rises from 65% in September to 76% in October, adding to the chill in the air. For more detailed weather insights, you can check Vail weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a pleasant minimum of -8°C (17°F) to a maximum of 25°C (78°F), with an average of 10°C (50°F). This month experiences 31 mm (1.2 in) of precipitation over about 5 days, coupled with a humidity level of 65%. In stark contrast, November sees much colder conditions, with temperatures dipping as low as -28°C (-18°F) and peaking at only 12°C (54°F), averaging around -6°C (22°F). Precipitation increases to 46 mm (1.8 in) across 9 days, and humidity rises to 82%. For more specific weather insights, check out Vail weather in November.
In September, temperatures in Vail range from a chilly -8°C (17°F) at night to a pleasant 25°C (78°F) during the day, with an average of 10°C (50°F). The month sees about 31 mm (1.2 in) of precipitation over five days, and humidity levels hover around 65%. In contrast, December brings a drastic drop in temperatures, with nightly lows plummeting to -28°C (-19°F) and daytime highs reaching only 8°C (46°F), resulting in an average temperature of -10°C (14°F). Precipitation increases to 48 mm (1.9 in) over ten days, accompanied by a higher humidity level of 89%. For more information on the winter conditions, you can check Vail weather in December.
As September unfolds in Vail, it offers a refreshing transition from the warmth of summer to the crispness of fall. The days are pleasantly mild with average temperatures around 10°C (50°F), while the occasional peak at 25°C (78°F) invites outdoor activities under clear skies. However, as the month progresses, you might experience colder nights dipping toward -8°C (17°F), unlike the milder summer evenings. September also brings a moderate 31 mm of precipitation over about five days, contributing to the lush surroundings and preparing the landscape for the vibrant autumn colors ahead. With a humidity level around 65%, you’ll enjoy a delightful mix of refreshing air and scenic beauty. For more details on how Vail’s weather evolves throughout the year, check out Vail Climate.