September Weather in Steamboat Springs, United States

Last updated: February 24, 2025

In Steamboat Springs, the weather in September showcases a delightful transition into autumn, with a maximum temperature reaching 30°C (86°F) and an average settling at a comfortable 12°C (55°F). As the month progresses, temperatures can dip as low as -6°C (22°F), emphasizing the crispness of the season. Rainfall is modest, with a total precipitation amount of 29 mm (1.2 in) spread across five days, contributing to the area's vibrant fall foliage. The relative humidity averages around 63%, creating a refreshingly cool atmosphere perfect for outdoor activities and exploration.

September Temperature in Steamboat Springs

In Steamboat Springs, September marks a transition toward cooler temperatures as summer bids farewell. The month opens with a notable chill, where the minimum temperature hovers around -6°C (22°F), but it quickly warms during the day, peaking at a maximum of 30°C (86°F). The average temperature settles comfortably at 12°C (55°F), offering a pleasant reprieve from the summer heat while heralding the upcoming fall. This seasonal shift is further emphasized as temperatures begin to trend downward towards the colder months, painting a picturesque landscape as the vibrant hues of autumn start to emerge. Overall, September in Steamboat Springs presents a delightful balance, inviting both locals and visitors to enjoy the crisp air and beautiful scenery.

September Weather in Steamboat Springs: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Steamboat Springs, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec192129344257646254372619
Data source: Temperature data for Steamboat Springs generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Steamboat Springs

In September, Steamboat Springs experiences a noticeable shift in precipitation patterns, accumulating 29 mm (1.2 in) of rain over 5 days. This marks a slight increase from the drier summer months of July and August, where rainfall dipped to just 17 mm and 20 mm, respectively. As the season transitions, September acts as a bridge, balancing the lighter summer precipitation with the more substantial autumn rains that follow. Notably, this month’s rainfall lays the groundwork for the coming October, which typically brings back higher levels of moisture, averaging 60 mm (2.4 in) over 10 days. This progression underscores the evolving climate of Steamboat Springs, illustrating how September's modest rains herald the transition to wetter months ahead.

September Precipitation Trends in Steamboat Springs

The chart displays monthly precipitation patterns in Steamboat Springs, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec648967606231172029605471
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Steamboat Springs

In Steamboat Springs, September marks a notable transition in humidity levels, as the average settles at 63%. This figure is consistent with the preceding months of July and August, both of which also hover around 62-63%. However, as the crispness of autumn approaches, humidity begins to rise again in October, reaching 72%. This gradual increase highlights a trend where the late summer's drier conditions give way to more moisture-laden air as fall settles in. Overall, September's humidity represents a slight plateau before the seasonal shift, maintaining the comfortable, mild conditions characteristic of early autumn in this picturesque mountain town.

September Average Humidity in Steamboat Springs

This chart illustrates the average monthly humidity levels in Steamboat Springs, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%86%75%67%67%68%62%63%63%72%80%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Steamboat Springs

In September, Steamboat Springs experiences a UV Index of 10, classifying it as very high, which means sun protection is essential for outdoor activities. The burn time, at 15 minutes, signifies the need for careful exposure management as summer begins to transition to fall. This month follows a pattern where the UV Index remains high throughout the summer, peaking in June at 13, before gradually decreasing. Despite this decline, September still presents a significant risk compared to the lower values seen in the fall and winter months. As the days shorten, it's crucial for residents and visitors alike to stay informed and take precautions to enjoy the beautiful autumn outdoors safely. For detailed daily forecasts, check the Steamboat Springs UV Index.

Maximum UV Index Levels in Steamboat Springs for September

The chart shows the monthly maximum UV Index (UVI) for Steamboat Springs in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec469121213121110753
Data source: Steamboat Springs September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Steamboat Springs

As summer fades in Steamboat Springs, September embraces the transition with a delightful 315 hours of sunshine. This month signals a slight dip in daylight compared to the bustling summer months, yet it still radiates warmth, marking it as one of the sunniest times of the year. Following the peak of 389 hours in July, September’s sunshine reflects the gradual cooling as fall approaches, but it remains significantly brighter than the winter months ahead, such as January with only 162 hours. This trend highlights the enduring beauty of September, making it an ideal time to explore the stunning landscapes before the chill sets in. Whether hiking, biking, or simply basking in the golden rays, visitors can relish the perfect blend of warmth and crispness that defines this enchanting month.

Monthly Sunshine Duration in Steamboat Springs: September Highlighted

The September sunshine duration represents the total number of hours Steamboat Springs experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec162h213h281h307h357h386h389h361h315h266h228h211h
Data source: Steamboat Springs September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Steamboat Springs During September

In Steamboat Springs, September ushers in a significant shift towards more radiant days, boasting a 67% chance of sunny weather. This trend is part of a broader seasonal pattern where summer months, particularly August with 68%, showcase the peak sunshine, while earlier months struggle with lower probabilities. By the time September rolls around, residents and visitors alike can bask in the mild temperatures and abundant sunshine, as the city transitions into the fall. Not only does this month maintain high chances of clear skies, but it also marks a delightful balance between the warmth of summer and the crispness of autumn, making it an ideal time for outdoor activities and enjoying the stunning landscapes.

Percentage of Sunny Days in September in Steamboat Springs

The chart illustrates the percentage of sunny days in Steamboat Springs throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Steamboat Springs experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec42%30%49%52%44%63%59%68%67%49%51%46%
Data source: Steamboat Springs September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Steamboat Springs in September

As summer gives way to fall, September in Steamboat Springs experiences a gradual decline in daylight, showcasing 12 hours of sunlit brilliance. This reduction highlights a clear trend: after the summer's peak with 15 hours of daylight in June, the light begins to wane as the seasons shift. Following the steady descent through August, when the days shorten to 13 hours, September ushers in a more balanced rhythm, inviting residents and visitors alike to embrace the transitioning landscape. As the days continue to shorten into October, the charm of autumn brings a picturesque backdrop, perfect for enjoying the vibrant foliage under the remaining daylight hours.

Average Daylight Hours in Steamboat Springs for September

The chart illustrates the variation in daylight duration in Steamboat Springs throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 38m10h 40m11h 58m13h 19m14h 26m15h14h 41m13h 41m12h 24m11h 4m9h 54m9h 19m
Data source: Steamboat Springs daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Steamboat Springs

As September unfolds in Steamboat Springs, the average wind speed settles at a gentle 2.2 m/s (5 mph), reflecting a continuation of the region's mild breezes. Throughout the year, the wind patterns show a fascinating consistency, with speeds hovering primarily around the 2.3 m/s mark during the late spring and summer months. The shift into autumn brings only a slight dip in wind velocity, similar to what is experienced in the early months of winter. This reliable, light wind not only enhances the crisp, refreshing atmosphere of September but also creates an ideal backdrop for outdoor activities. As nature prepares for its seasonal transformation, the calm yet invigorating winds invite residents and visitors alike to revel in the beauty of the changing landscape.

Average September Wind Speed in Steamboat Springs

The chart displays monthly wind speed patterns in Steamboat Springs, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.02.62.32.32.32.32.02.42.2 m/s2.22.32.6
Data source: Steamboat Springs September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Steamboat Springs Compares to Other Months

The weather in Steamboat Springs 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 Steamboat Springs and find detailed weather information for every month.

When comparing the weather in September to that of January, one can clearly see a stark contrast. September experiences a wider temperature range, with minimums of -6°C (22°F) and highs reaching up to 30°C (86°F), resulting in a pleasant average of 12°C (55°F). In contrast, January is much colder, with average temperatures plummeting to -7°C (19°F) and minimums dipping to a frigid -26°C (-14°F). Additionally, January sees significantly more precipitation, with 64 mm (2.5 in) spread over 12 days, compared to September's 29 mm (1.2 in) over just 5 days. The increase in humidity from 63% in September to 84% in January further emphasizes the difference in climate between these two months. For a more detailed look at winter weather, check out Steamboat Springs weather in January.

When comparing the weather in September and February, distinct contrasts emerge. September experiences a temperature range from a minimum of -6°C (22°F) to a maximum of 30°C (86°F), with an average of 12°C (55°F) and relatively low precipitation of 29 mm (1.2 in) over about 5 days. In contrast, February is characterized by much colder conditions, with temperatures dipping as low as -26°C (-15°F) and averaging -6°C (21°F), reaching a maximum of only 12°C (54°F). In February, precipitation increases significantly to 89 mm (3.5 in) across 16 days, paired with higher humidity levels of 85%. For a closer look at the weather specifics in February, you can check out Steamboat Springs weather in February.

When comparing the weather in September to March, it's clear that March is significantly colder. September experiences a minimum temperature of -6°C (22°F) and an average of 12°C (55°F), with maximums reaching up to 30°C (86°F). In contrast, March has a chilling minimum of -23°C (-9°F) and an average temperature of -2°C (29°F), with maximums peaking at only 14°C (57°F). Additionally, March tends to be wetter, receiving 67 mm (2.6 in) of precipitation over 14 days compared to September's 29 mm (1.2 in) over just 5 days. The humidity is also higher in March at 75%, while September sits at 63%. For more details, check Steamboat Springs weather in March.

The weather in September contrasts significantly with that of April. September typically experiences a broader temperature range, with a minimum of -6°C (22°F), an average of 12°C (55°F), and a maximum reaching up to 30°C (86°F). In comparison, April's temperatures are generally cooler, starting with a minimum of -16°C (3°F) and only peaking at 14°C (58°F) on average. Rainfall is also more prevalent in April, with 60 mm (2.4 inches) of precipitation over 12 days, compared to September's 29 mm (1.2 inches) over just 5 days. The humidity levels are slightly higher in April at 67%, versus 63% in September. For more detailed insights, check out Steamboat Springs weather in April.

When comparing the weather in September and May, notable differences emerge in temperature and precipitation patterns. September experiences a broader temperature range, with minimums of -6°C (22°F) and maximums reaching up to 30°C (86°F), leading to an average of 12°C (55°F). In contrast, May is cooler overall, with temperatures ranging from a low of -11°C (12°F) to a high of 24°C (75°F) and an average of 6°C (42°F). Precipitation is also more frequent in May, with 62 mm (2.4 in) falling over 12 days compared to September's 29 mm (1.2 in) over just 5 days. Humidity levels are slightly higher in May at 67%, compared to September’s 63%. For a closer look at May weather specifics, visit Steamboat Springs weather in May.

In September, temperatures range from a minimum of -6°C (22°F) to a maximum of 30°C (86°F), with an average temperature of 12°C (55°F). The month sees about 29 mm (1.2 in) of precipitation over five days, and humidity levels are at 63%. In contrast, June experiences slightly warmer weather, with a minimum temperature of -2°C (29°F), an average of 14°C (57°F), and a maximum of 31°C (88°F). Rainfall is slightly higher at 31 mm (1.2 in) across the same number of rainy days, while humidity is a bit more elevated at 68%. For more detailed insights into June weather in Steamboat Springs, check out Steamboat Springs weather in June.

When comparing the weather in September and July, notable contrasts emerge. In September, temperatures can range from a chilly minimum of -6°C (22°F) to a warm maximum of 30°C (86°F), averaging around 12°C (55°F). In contrast, July tends to be milder, with minimums of 3°C (37°F) and maximums peaking at 31°C (88°F), averaging 18°C (64°F). Precipitation is slightly higher in September, with 29 mm (1.2 in) over five days, compared to July's 17 mm (0.7 in) also across five days. Humidity levels remain quite similar, with September at 63% and July at 62%. For a closer look at July's specifics, check out Steamboat Springs weather in July.

In comparing the weather between September and August, both months exhibit maximum temperatures that peak at a comfortable 30°C (86°F). However, September experiences a broader temperature range with a minimum dropping to -6°C (22°F) and an average of 12°C (55°F), compared to August's milder minimum of 3°C (37°F) and average of 17°C (62°F). Precipitation is slightly higher in September at 29 mm (1.2 in) over 5 days, whereas August sees 20 mm (0.8 in) over 4 days. Interestingly, both months maintain the same humidity level of 63%. For more detailed insights, check out Steamboat Springs weather in August.

The weather in September is characterized by a warmer and more variable climate, with temperatures ranging from a chilly -6°C (22°F) at night to a pleasant 30°C (86°F) during the day, resulting in an average of 12°C (55°F). It experiences relatively low precipitation of 29 mm (1.2 in) over about 5 days, and humidity levels hover around 63%. In contrast, October brings a significant drop in temperatures, with nighttime lows plummeting to -28°C (-18°F) and daytime highs reaching a maximum of 22°C (72°F), leading to an average of just 3°C (37°F). This month also sees increased precipitation, totaling 60 mm (2.4 in) over approximately 10 days, and higher humidity at 72%. For more detailed insights, check out Steamboat Springs weather in October.

September and November present stark contrasts in weather conditions. In September, temperatures range from a mild minimum of -6°C (22°F) to a warm maximum of 30°C (86°F), with an average of 12°C (55°F). Precipitation is relatively low at 29 mm (1.2 in) over five days, and humidity sits at a comfortable 63%. In contrast, November sees a significant drop in temperature, with minimums plunging to -25°C (-12°F) and a maximum of only 14°C (58°F), resulting in an average temperature of -3°C (27°F). This month experiences higher precipitation at 54 mm (2.1 in) over nine days, coupled with a rise in humidity to 79%. For more details on November weather, you can check Steamboat Springs weather in November.

In September, the weather is considerably milder, with temperatures ranging from a minimum of -6°C (22°F) to a maximum of 30°C (86°F) and an average of 12°C (55°F). The month sees lower humidity at around 63% and only 29 mm (1.2 in) of precipitation over about five days. In contrast, December brings a significant drop in temperatures, with a minimum of -28°C (-18°F), an average of -7°C (19°F), and a maximum of 9°C (49°F). The winter month experiences higher humidity at 85% and more substantial precipitation at 71 mm (2.8 in) over approximately 12 days. For more detailed information, you can check Steamboat Springs weather in December.

Compare Steamboat Springs's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Steamboat Springs

As summer gradually transitions into fall, September in Steamboat Springs offers a refreshing change in weather, marked by pleasantly mild temperatures and a hint of crispness in the air. Unlike the hotter months, average highs settle into a more comfortable range, making outdoor adventures even more enjoyable. While the chance of rain remains, with a modest 29 mm of precipitation over just a few days, it contributes to the enchanting beauty of the fall foliage that begins to emerge. As humidity levels hover around 63%, the conditions remain breathable, setting the stage for delightful days filled with activities and evenings perfect for cozy gatherings. For a detailed understanding of what to expect throughout the year, be sure to check out the Steamboat Springs Climate.