September Weather in Telluride, United States

Last updated: February 24, 2025

In September, Telluride, United States, showcases a delightful transition into fall with an average temperature of 10°C (50°F), peaking at a maximum of 24°C (76°F). As summer gives way to cooler days, nighttime temperatures can drop to a brisk -10°C (14°F). This month averages 50 mm (2.0 in) of precipitation over 8 days, resulting in a humidity level of 59% that adds to the crisp mountain air. The combination of mild days and cooler nights creates a picturesque setting ideal for outdoor activities, making it an enchanting time to explore the beauty of the Rockies.

September Temperature in Telluride

In September, Telluride experiences a transition as summer begins to give way to autumn. With minimum temperatures dipping to around -10°C (14°F), the crispness in the air hints at the cooler months ahead, while the average temperature settles at a comfortable 10°C (50°F), ideal for outdoor activities. Daytime highs can reach a pleasant 24°C (76°F), allowing visitors to still enjoy the stunning mountain scenery in relatively mild conditions. This month stands out as a bridge between the warm, vibrant days of summer and the chilly embrace of fall, making it a unique time to experience the charm of Telluride's natural beauty.

September Weather in Telluride: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Telluride, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec182027323952575650362518
Data source: Temperature data for Telluride 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 Telluride

In September, Telluride experiences a shift in its precipitation patterns as the summer heat wanes, accumulating 50 mm (2.0 in) of rainfall over 8 days. This marks a slight decrease in both total precipitation and rain days compared to the more intense deluge of July, which boasts the highest rainfall at 113 mm (4.5 in) over 15 days. Following the vibrant summer months, September's weather begins to transition, with moisture levels dipping closer to the figures noted in October and November, suggesting a gradual descent into fall. As the mountain air starts to cool, the relatively moderate precipitation provides a refreshing contrast to the heavier rains of summer, paving the way for the stunning autumn foliage that Telluride is known for.

September Precipitation Trends in Telluride

The chart displays monthly precipitation patterns in Telluride, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5273826056301145450524360
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Telluride

As summer wanes and September arrives in Telluride, the humidity begins to shift, rising to 59%. This increase marks a notable transition from the dry summer months, where July and August dipped to 36% and 44% respectively. The trend in humidity throughout the year shows a gradual decrease from the moist winter months, which hover around 85% in January and December, to a summer low before climbing back up in the fall. September’s humidity offers a refreshing respite from the drier summer air, blending the crispness of autumn with a touch of lingering warmth. This blend not only enhances the beauty of the changing leaves but also sets the stage for the cozy winter months ahead.

September Average Humidity in Telluride

This chart illustrates the average monthly humidity levels in Telluride, 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.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%76%69%53%40%36%44%59%74%83%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Telluride

As summer fades into autumn, September in Telluride continues to bask in extreme UV Index levels, measuring 11. This sharp drop from the heights of July and August, where the index peaked at 13 and 12 respectively, still indicates a significant potential for sun damage. With a burn time of just 10 minutes, it's crucial for outdoor enthusiasts to stay vigilant about sun protection. This trend highlights the need for caution even as the seasons change, reminding visitors that the sun's intensity remains a force to respect. For more insights into UV trends throughout the year, visit Telluride UV Index.

Maximum UV Index Levels in Telluride for September

The chart shows the monthly maximum UV Index (UVI) for Telluride 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.
JanFebMarAprMayJunJulAugSepOctNovDec4710131314131211864
Data source: Telluride 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 Telluride

As the summer sun begins to wane, September in Telluride offers a remarkable 315 hours of sunshine, making it a delightful month for outdoor enthusiasts. This post-summer glow continues the trend of abundant daylight, following a peak in May with 365 hours. The steady decline into October is gradual, with September still boasting more sunshine than the colder months ahead. Visitors can revel in the crisp air and stunning fall foliage, enjoying the vibrant colors under a sky that is still generous with sun. Overall, September strikes a beautiful balance, blending the warmth of summer with the fresh feelings of autumn—ideal for exploring the breathtaking landscapes of this mountain town.

Monthly Sunshine Duration in Telluride: September Highlighted

The September sunshine duration represents the total number of hours Telluride 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.
JanFebMarAprMayJunJulAugSepOctNovDec173h217h289h324h365h381h379h358h315h284h248h221h
Data source: Telluride September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Telluride During September

As September arrives in Telluride, the chance of sunny days climbs to an impressive 70%, solidifying its status as one of the sunniest months of the year. This upward trend in sunshine is notable when compared to the earlier summer months, where the chances hovered around 51% to 68%. September is a transition month; it not only boasts clearer skies but also marks the beginning of autumn's vibrant foliage, making it a perfect time for outdoor activities and scenic views. With the weather turning pleasantly warm and reliable sunshine, this month invites both locals and visitors to soak in the stunning landscapes under bright blue skies.

Percentage of Sunny Days in September in Telluride

The chart illustrates the percentage of sunny days in Telluride 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 Telluride experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec57%46%51%61%57%64%51%68%70%56%70%49%
Data source: Telluride September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Telluride in September

As September rolls into Telluride, the landscape begins to transition into autumn, reflected in the shift of daylight hours. With an average of 12 hours of daylight, this month marks a gentle decline from the summer solstice peak of 14 hours enjoyed from June through August. After basking in the extended sunlight of summer, the days shorten gradually, echoing the approach of cooler weather. This trend signifies the onset of fall, where the vibrant hues of changing leaves are accompanied by a cozy decrease in daylight, ushering in a season of warmth and reflection.

Average Daylight Hours in Telluride for September

The chart illustrates the variation in daylight duration in Telluride throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 51m10h 47m11h 59m13h 12m14h 14m14h 44m14h 28m13h 32m12h 22m11h 9m10h 5m9h 33m
Data source: Telluride daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Telluride

In September, the wind in Telluride gently whispers at an average speed of 1.9 m/s (4 mph), slightly slower than the previous months, yet still adding to the region's enchanting atmosphere. This trend of mild breezes throughout the summer months gives way to a subtle transition as autumn approaches. Compared to the higher gusts experienced earlier in spring, where speeds peaked around 2.4 m/s (5 mph) in April, September’s calmness reflects a period of tranquility before the crisp, invigorating winds of fall set in. Notably, the wind speeds remain consistent with a gentle rhythm, offering a picturesque backdrop for both residents and visitors to savor the stunning fall foliage as it begins to emerge.

Average September Wind Speed in Telluride

The chart displays monthly wind speed patterns in Telluride, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.82.12.22.42.32.01.72.01.9 m/s2.11.82.3
Data source: Telluride September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Telluride Compares to Other Months

The weather in Telluride 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 Telluride and find detailed weather information for every month.

In comparing the weather of September and January, there is a stark contrast in temperatures and atmospheric conditions. September showcases a broader temperature range with minimums around -10°C (14°F) and maximums reaching up to 24°C (76°F), leading to a comfortable average of 10°C (50°F). In contrast, January often experiences much colder conditions, with minimum temperatures plummeting to -23°C (-10°F) and an average temperature of -8°C (18°F), peaking at only 7°C (45°F). The precipitation levels are similar, with September receiving 50 mm over 8 days versus January's 52 mm over 10 days; however, January's humidity is significantly higher at 85% compared to September's 59%. For more detailed insights on January weather, check out Telluride weather in January.

September and February present stark contrasts in weather conditions. In September, temperatures fluctuate between a minimum of -10°C (14°F) and a maximum of 24°C (76°F), with an average of 10°C (50°F). The month experiences moderate precipitation totaling 50 mm (2.0 in) over about 8 days, coupled with a humidity level of 59%. In contrast, February is much colder, with temperatures ranging from a biting minimum of -25°C (-12°F) to a maximum of only 10°C (51°F), averaging around -7°C (20°F). This month sees more precipitation at 73 mm (2.9 in) spread across 13 days and significantly higher humidity at 86%. For more detailed information on the February climate, check out Telluride weather in February.

In September, the weather is generally milder, with average temperatures ranging from a minimum of -10°C (14°F) to a maximum of 24°C (76°F) and an average of 10°C (50°F). This month typically experiences less precipitation, averaging 50 mm (2.0 in) over about 8 days, along with a humidity level of 59%. In contrast, March brings colder temperatures, with a minimum of -21°C (-5°F) and a maximum of 11°C (53°F), resulting in an average temperature of -3°C (27°F). Precipitation is higher during this month, averaging 82 mm (3.2 in) over 13 days, and the humidity rises to 76%. For a detailed overview, check out Telluride weather in March.

Comparing the weather in September and April reveals distinct seasonal differences. September enjoys milder temperatures, ranging from a minimum of -10°C (14°F) to a maximum of 24°C (76°F), with an average of 10°C (50°F). In contrast, April is generally colder, with temperatures dipping to -17°C (1°F) at night and reaching a maximum of 12°C (55°F), averaging around 0°C (32°F). While both months experience precipitation, September sees about 50 mm (2.0 in) over approximately 8 days, whereas April has slightly more rain at 60 mm (2.4 in) over 10 days. Humidity levels are also higher in April at 69% compared to September's 59%. For more details, check out Telluride weather in April.

In comparing the weather between September and May, we see some notable differences. September typically enjoys a broader temperature range, with minimums of -10°C, average highs around 10°C, and maximums reaching 24°C, while May experiences slightly cooler temperatures, with minimums at -12°C, an average of 4°C, and maximums peaking at 20°C. Precipitation is fairly consistent, with September receiving 50 mm over about 8 days, compared to May's 56 mm over 10 days. Humidity levels are also relatively close, with September at 59% and May slightly lower at 53%. For more detailed insights about May weather, you can check Telluride weather in May.

When comparing the weather in September and June, notable differences emerge in temperature and humidity levels. June tends to be slightly warmer, with average temperatures ranging from -7°C (20°F) to a maximum of 26°C (78°F), while September presents a broader range, with minimums dipping to -10°C (14°F) and highs reaching 24°C (76°F). Additionally, June experiences lower humidity at 40%, compared to September’s 59%, creating a drier feel during the earlier summer month. Precipitation is also less frequent in June, occurring over just 6 days with a total of 30 mm (1.2 in), while September sees a bit more rain over 8 days, totaling 50 mm (2.0 in). For a more detailed look at weather in June, check out Telluride weather in June.

In comparing the weather between July and September, we can see notable differences in temperature and precipitation. July generally experiences warmer temperatures with a minimum of 0°C (32°F) and an average of 14°C (58°F), reaching up to 26°C (79°F). In contrast, September boasts a broader temperature range, with a minimum of -10°C (14°F) and an average of 10°C (50°F), peaking at 24°C (76°F). When it comes to precipitation, July is significantly wetter, receiving 113 mm (4.5 in) over 15 days, whereas September has only 50 mm (2.0 in) spread over 8 days. Additionally, the humidity is higher in September at 59%, compared to July's 36%. For more detailed information, you can visit Telluride weather in July.

In comparing the weather between August and September, we observe notable differences in temperature and humidity. September boasts a more extreme temperature range, with a minimum of -10°C (14°F), against August's milder minimum of 1°C (35°F). Both months share the same maximum temperature of 24°C (76°F), but September averages a slightly cooler 10°C (50°F) compared to August's 13°C (56°F). Precipitation levels are comparable, with September receiving 50 mm (2.0 in) over 8 days and August slightly higher at 54 mm (2.1 in) over 10 days. Additionally, September's higher humidity at 59% contrasts with August's more comfortable 44%. For a detailed look at August’s weather specifics, check out Telluride weather in August.

In September, the weather features a mild average temperature of 10°C (50°F), with temperatures ranging from a minimum of -10°C (14°F) to a maximum of 24°C (76°F). This month experiences moderate humidity at 59% and receives about 50 mm (2.0 in) of precipitation over 8 days. In contrast, October brings a significant drop in temperature, with an average of 2°C (36°F) and a minimum plunging to -27°C (-17°F). Although precipitation slightly increases to 52 mm (2.0 in) over 10 days, the humidity also rises to 74%. For more detailed information on specific conditions, you can check Telluride weather in October.

September and November exhibit notable differences in weather conditions. In September, temperatures range from a minimum of -10°C (14°F) to a maximum of 24°C (76°F), with an average temperature around 10°C (50°F). The month experiences about 50 mm (2.0 in) of precipitation over 8 days and a humidity level of 59%. In contrast, November brings much colder temperatures, with a minimum of -27°C (-16°F) and a maximum of only 14°C (57°F), leading to an average of -4°C (26°F). Although November sees slightly less precipitation at 43 mm (1.7 in) over the same number of days, the humidity rises significantly to 83%. For more details on November weather conditions, you can visit Telluride weather in November.

September weather is generally milder, featuring temperatures that range from a minimum of -10°C (14°F) to a maximum of 24°C (76°F), with an average of 10°C (50°F). The month sees about 50 mm (2.0 in) of precipitation over 8 days, and humidity levels are relatively moderate at 59%. In contrast, December experiences much colder conditions, with temperatures plummeting to a minimum of -26°C (-15°F) and averaging -8°C (18°F), peaking at just 9°C (49°F). Precipitation increases slightly to 60 mm (2.4 in) over 11 days, accompanied by higher humidity at 85%. For those interested in more detailed December conditions, you can check out Telluride weather in December.

Compare Telluride's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Telluride

As September unfolds in Telluride, the weather embarks on a distinct transition. With cooler averages taking hold, temperatures drop from the summer peaks, allowing for comfortable exploration of the area's breathtaking landscapes. While visitors can still enjoy pleasant days with occasional warmth, the nights turn significantly cooler, hinting at the approaching winter. Precipitation, though present, tends to be moderate, making this month a relatively dry time compared to the wetter seasons. Overall, September offers a unique blend of lingering warmth and crisp air, making it an ideal period for those seeking both adventure and serenity in nature. For a deeper understanding of the area’s climate, check out Telluride Climate.