Last updated: February 24, 2025
September in Gunnison, United States, showcases a delightful transition into fall, with temperatures reaching a maximum of 28°C (82°F) during the day, while the evenings cool down to an average of 12°C (54°F). The month experiences a chilly minimum of -6°C (22°F), reminding residents of the approaching winter. Precipitation is modest, totaling 24 mm (0.9 in) over 5 days, contributing to a humidity level of 65% that enhances the crispness of the air. Visitors can expect a picturesque early autumn setting, characterized by vibrant foliage and mild weather, ideal for outdoor adventures and explorations.
In Gunnison, United States, September marks a transition into fall, characterized by cooler temperatures and crisp air. The month starts with minimums around -6°C (22°F) and climbs to pleasant averages of 12°C (54°F), reaching a maximum of 28°C (82°F) on warmer days. This gradual decline from the summer highs reflects a notable shift, as August wraps up with similar peak temperatures but higher average warmth. As the days grow shorter and cooler, September serves as a gentle reminder of the approaching winter, setting the stage for the dramatic temperature drops seen in October and beyond. It's a month where the beauty of autumn colors emerges against the backdrop of Gunnison's breathtaking landscapes.
In September, Gunnison experiences a noticeable uptick in precipitation, with 24 mm (0.9 in) registered over the course of five days. This marks a shift from the drier months of June and August, which recorded only 18 mm (0.7 in) and 16 mm (0.6 in), respectively. The increase in rain helps to transition the region into the cooler fall season, setting the stage for the more substantial precipitation in October, which averages 41 mm (1.6 in). This trend highlights September as a bridge between the dry summer months and the wetter seasons ahead, providing much-needed moisture for the local ecosystem.
In September, Gunnison experiences a notable uptick in humidity, with levels reaching 65%. This month acts as a transitional period, bridging the drier summer months of July and August, which saw lows of 52% and 56%, respectively. As the seasons change, humidity levels gradually increase again, foreshadowing the approaching cooler months. Interestingly, this rise serves not only as a preamble to the wetter fall and winter seasons—but also highlights a return to the more humid conditions typical of early spring, where figures hover around 76% to 81%. This trend illustrates how Gunnison's climate intricately weaves together varying humidity levels throughout the year, creating a unique atmospheric rhythm that defines each season.
In September, Gunnison experiences a UV Index of 10, categorizing it as very high and resulting in a burn time of just 15 minutes. This decline in the UV Index from the extreme values of the summer months indicates a shift in seasonal sun exposure. Despite a slight dip, the UV radiation remains significant, urging residents and visitors alike to stay vigilant about sun protection. The transition from the scorching summer months—where indices peaked at 13—is a reminder that even as the temperatures cool, sun safety should not be overlooked. For a comprehensive understanding of sun exposure in Gunnison throughout the year, check the full details at Gunnison UV Index.
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As September rolls into Gunnison, the sunshine continues to illuminate the breathtaking landscapes, boasting an impressive 317 hours of sunlight this month. This marks a gentle decline from the peak brightness of 383 hours in June, yet it remains robust compared to the more subdued winter months. The trend of increasing daylight hours from January's 176 hours to May's 367 hours showcases a gradual warming, inviting outdoor enthusiasts to relish the transition into fall. While October brings a further dip in sunny days, September stands as a vibrant reminder of summer’s lingering warmth, with sun-soaked afternoons perfect for hiking in the stunning Colorado Rockies. Such a rich tapestry of sunshine plays a vital role in shaping Gunnison’s captivating seasonal rhythms.
As September rolls in, Gunnison, Colorado, enjoys a delightful 72% chance of sunny weather, marking it as one of the sunniest months of the year. This trend reflects an upward trajectory in sunshine probability, peaking in August and carrying the warmth into September. Following a summer of sunny days, the transition into fall does little to dampen the spirits, as the likelihood of clear skies remains notably high. This vibrant month not only promises ample sunshine but also an array of outdoor opportunities, making it an exceptional time to soak in the beauty of the changing season.
As September arrives in Gunnison, the days begin to shorten, marking a transition from the sun-drenched heights of summer. With about 12 hours of daylight, this month offers a perfect balance after the peak of 14 hours in June, July, and August. The gradual decrease in daylight from 14 hours in the height of summer to 12 hours now hints at the onset of autumn, signaling the end of long, vibrant days. This subtle shift continues into October, where daylight dips further to 11 hours, as the landscape begins to transform with the colors of fall. Each passing month reflects nature's rhythm, reminding us of the seasonal cycles that shape life in this picturesque corner of the United States.
As September arrives in Gunnison, United States, the average wind speed settles at a gentle 1.9 m/s (4 mph), maintaining the trend of a slight decrease from the summer months. This soft wind marks the transition from the warmer summer breezes to the more invigorating autumn gales. Throughout the year, January to August showcased consistently mild winds, with the highest point in February at 2.4 m/s (5 mph). However, as we move into fall, September holds steady with the same wind speed as August, suggesting a calm before the gusts typically associated with October's return to 2.0 m/s (5 mph). This gradual change reflects the region's characteristic climate shifts, inviting residents and visitors alike to enjoy the serene winds as they herald the vibrant autumn colors.
The weather in Gunnison 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 Gunnison and find detailed weather information for every month.
In September, the weather is significantly milder, with temperatures ranging from a chilly -6°C (22°F) at night to a warm 28°C (82°F) during the day. With an average temperature of 12°C (54°F) and only 24 mm (0.9 in) of precipitation across 5 days, the humidity levels at 65% provide a comfortable atmosphere for outdoor activities. In contrast, January brings much harsher conditions, as temperatures plummet to a minimum of -28°C (-18°F) and only rise to a maximum of 7°C (45°F), resulting in an average temperature of -9°C (16°F). This month also sees higher precipitation at 44 mm (1.8 in) over 9 days, accompanied by higher humidity at 88%. For a more detailed look at January weather, visit Gunnison weather in January.
September and February present starkly contrasting weather conditions. September boasts a milder climate with an average temperature of 12°C (54°F), ranging from a chilly -6°C (22°F) to a warm 28°C (82°F). The precipitation is relatively low at 24 mm (0.9 in) over just 5 days, accompanied by a moderate humidity level of 65%. In contrast, February is significantly colder, with an average temperature of -7°C (19°F), dipping to a frigid -28°C (-18°F) and peaking only at 12°C (54°F). It experiences higher precipitation of 58 mm (2.3 in) spread over 12 days, and humidity levels rise to 87%, creating a damp, chilly atmosphere. For more details, you can refer to Gunnison weather in February.
September and March exhibit stark contrasts in weather conditions. In September, temperatures range from a minimum of -6°C (22°F) to a maximum of 28°C (82°F), with an average of 12°C (54°F). This month experiences relatively low precipitation of 24 mm (0.9 in) over just 5 days and a humidity level of 65%. In contrast, March presents much colder temperatures, with a minimum of -24°C (-10°F) and a maximum of 12°C (55°F), resulting in an average temperature of -3°C (27°F). Additionally, March has higher precipitation at 56 mm (2.2 in) spread across 12 days, along with increased humidity at 81%. For more details on the weather during this month, you can check Gunnison weather in March.
In comparing the weather in September and April, we see considerable differences in temperature and precipitation. September enjoys milder temperatures, with a minimum of -6°C (22°F), an average of 12°C (54°F), and a maximum of 28°C (82°F), along with relatively low precipitation of 24 mm (0.9 in) over 5 days and a humidity level of 65%. In contrast, April is much cooler, with a minimum of -18°C (1°F), an average of only 1°C (34°F), and a maximum of 16°C (61°F). Additionally, April experiences higher precipitation at 43 mm (1.7 in) spread across 10 days, accompanied by increased humidity at 76%. For more detailed information about weather specifics, you can explore Gunnison weather in April.
In comparing the weather of September and May, September generally experiences warmer temperatures, with a minimum of -6°C (22°F) and an average of 12°C (54°F), while May is chillier, with minimum temperatures dipping to -10°C (14°F) and an average of 6°C (44°F). The maximum temperature in September can reach a pleasant 28°C (82°F), compared to May's max of 23°C (74°F). When it comes to precipitation, September sees less rainfall (24 mm over 5 days) compared to May, which has 40 mm of precipitation over 9 days. Both months have comparable humidity levels, hovering around 65-66%. For more detailed weather insights in May, you can visit Gunnison weather in May.
In September, the weather features a broader temperature range with minimums around -6°C (22°F) and maximums reaching 28°C (82°F), averaging at 12°C (54°F). This month experiences slightly more precipitation, totaling 24 mm (0.9 in) over about five days, combined with a higher humidity of 65%. In contrast, June typically sees milder conditions, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 29°C (84°F) and an average of 14°C (57°F). June is slightly drier, with only 18 mm (0.7 in) of precipitation across the same number of days, and a lower humidity level of 58%. For more detailed information on June weather, you can visit Gunnison weather in June.
In September, the weather in Gunnison features a wider temperature range, with minimums dipping to -6°C (22°F) and maximums reaching up to 28°C (82°F), resulting in an average temperature of 12°C (54°F). The month experiences 24 mm (0.9 in) of precipitation over about 5 days, accompanied by a humidity level of 65%. In contrast, July presents warmer conditions, with minimum temperatures around 1°C (35°F) and maximums peaking at 30°C (86°F), leading to a more comfortable average of 17°C (62°F). July also sees higher precipitation at 35 mm (1.4 in) but over a longer duration of roughly 8 days, coupled with a lower humidity of 52%. For more detailed weather statistics in July, visit Gunnison weather in July.
September weather in Gunnison features a wider temperature range, with minimums dropping to -6°C (22°F) and maximums reaching up to 28°C (82°F), compared to August's minimum of 3°C (38°F) and maximum of 29°C (84°F). The average temperature in September is cooler at 12°C (54°F), while August maintains a warmer average of 16°C (61°F). Precipitation is slightly higher in September at 24 mm (0.9 in) compared to 16 mm (0.6 in) in August, although both months experience precipitation on roughly the same number of days—5. Additionally, humidity is higher in September at 65%, compared to 56% in August. For more details on August weather, check out Gunnison weather in August.
September experiences milder temperatures with a minimum of -6°C (22°F) and an average of 12°C (54°F), peaking at a comfortable 28°C (82°F). This month also sees relatively low precipitation of 24 mm (0.9 in) over about 5 days, with humidity levels around 65%. In contrast, October brings a significant drop in temperatures, with a minimum plunging to -25°C (-13°F) and an average of just 4°C (39°F), while the maximum settles at 22°C (72°F). Additionally, October is wetter, recording 41 mm (1.6 in) of precipitation across 9 days and higher humidity at 76%. To learn more about the weather patterns in this transitional month, check out Gunnison weather in October.
September and November present stark contrasts in weather conditions. In September, temperatures range from a chilly minimum of -6°C (22°F) to a warm maximum of 28°C (82°F), with an average of 12°C (54°F). Precipitation is relatively low at 24 mm (0.9 in) over five days, and humidity sits at a comfortable 65%. In sharp contrast, November experiences much colder temperatures, with a minimum of -28°C (-18°F) and a maximum that only reaches 15°C (58°F), averaging -4°C (26°F). This month also sees increased precipitation at 37 mm (1.5 in) over seven days, coupled with higher humidity levels at 82%. For more detailed information, check out Gunnison weather in November.
September weather in Gunnison presents a milder climate, with temperatures ranging from a chilly minimum of -6°C (22°F) to a pleasant maximum of 28°C (82°F) and an average of 12°C (54°F). The month sees relatively low precipitation, with only 24 mm (0.9 in) falling over approximately 5 days, and humidity resting at 65%. In contrast, December brings harsher conditions, with much colder temperatures that plummet to a minimum of -30°C (-22°F) and an average of -9°C (16°F), peaking at just 11°C (52°F). Precipitation increases during this winter month, totaling 48 mm (1.9 in) over about 10 days, and humidity rises significantly to 89%. For a detailed look at the December weather, you can visit this link: Gunnison weather in December.
As September settles in, Gunnison experiences a notable transition from the warmth of summer to the crispness of fall. The temperatures are milder, offering a comfortable average that invites outdoor exploration without the sweltering heat. With slightly increased humidity and occasional rainfall – around five days in the month – the lush landscapes begin to take on rich autumn hues. This period marks a gradual shift, making it a unique and vibrant time for visitors. For more detailed insights into the region's climate patterns throughout the year, visit Gunnison Climate.