Last updated: February 24, 2025
September in Silverthorne, United States, showcases a delightful transition into autumn, characterized by mild temperatures that range from a maximum of 23°C (74°F) to a cool average of 9°C (48°F). Nighttime can be brisk, with temperatures dipping to a minimum of -8°C (17°F). The month is adorned with moderate precipitation, totaling 36 mm (1.4 in) over 8 days, making it a refreshing time for the local environment. With a humidity level around 65%, visitors can expect a crisp yet invigorating atmosphere, perfect for exploring the majestic landscapes that surround this picturesque mountain town.
In September, Silverthorne experiences a noticeable transition as summer's warmth begins to fade. With minimum temperatures around -8°C (17°F) and average highs reaching 23°C (74°F), the month offers a pleasant blend of cooler mornings and mild afternoons. This month marks a significant drop in temperatures compared to the sweltering heights of July and August, where peaks hovered around 24°C (76°F). As autumn approaches, the average temperature settles at 9°C (48°F), providing a refreshing change while hinting at the chillier months ahead. September’s crisp air is perfect for outdoor activities, making it an ideal time to explore Silverthorne’s stunning natural landscape before winter sets in.
In September, Silverthorne experiences a noticeable drop in precipitation, with 36 mm (1.4 in) recorded over approximately 8 days. This marks a decline from the wetter months of July and August, which often soak the region with around 59 mm (2.3 in) and 43 mm (1.7 in), respectively. As summer transitions into fall, the changing weather patterns lead to a more moderate and crisp atmosphere, paving the way for the upcoming months. Compared to earlier in the year, precipitation levels in September are relatively lower, indicating a shift towards drier conditions that may hint at the arrival of snowier times later in the year. This trend highlights the beginning of a seasonal change in the region’s hydrology, with nature's cycle manifesting in both rainfall and temperature shifts.
As summer fades into autumn, September in Silverthorne experiences a notable shift in humidity, recording a moderate 65%. This shift marks a gradual rise from the drier conditions of July and August, which saw humidity levels drop to their lowest points of 52% and 56% respectively. The increase in September is a precursor to the more humid months that follow, with October climbing back to 76% and the year concluding with a spike in relative humidity during the winter months. Overall, September stands as a transitional period, balancing the drier summer air with the onset of autumn’s moisture-laden breezes.
As September rolls into Silverthorne, the UV Index sits at a notable 11, maintaining its place in the extreme exposure category. This signifies a slight decrease from the summer months, which peaked at 14 in June but remains significantly intense. With a burn time of just 10 minutes, it’s critical for residents and visitors alike to stay vigilant when enjoying the outdoors. Despite the transition into fall, the sun's rays still pose a considerable risk, encouraging proactive sun safety measures as part of your daily routine. For more detailed insights on UV trends, check out Silverthorne UV Index.
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In September, Silverthorne basks in a delightful 314 hours of sunshine, maintaining a vibrant atmosphere that bridges the height of summer and the onset of autumn. After enjoying the peak sunshine months of June and July, each boasting 382 hours, the sun remains a cherished companion as temperatures begin to cool. While August sees a slight decline to 357 hours, September's golden rays invite both locals and visitors to embrace outdoor adventures amidst the stunning backdrop of colorful fall foliage. As the days shorten gradually into October, where the sunshine dips to 280 hours, September serves as a radiant reminder of summer's lingering warmth, making it an ideal time for those seeking to soak in the last rays before winter settles in.
In Silverthorne, September marks the transition to autumn with a notable 67% chance of sunny weather, making it one of the sunniest months of the year. This upward trend in sunshine is a delightful progression from the summer months, as August holds a 65% chance, followed closely by the warm summer of June and July at 55% and 54%, respectively. As the year progresses, the probability of sunny days fluctuates, with winter months exhibiting lower chances, such as January's 51%. Overall, September stands out as a time when the outdoor beauty of Silverthorne can be fully appreciated, with a significant likelihood of clear skies and pleasant temperatures, inviting both locals and visitors to enjoy the splendor of nature before the colder season sets in.
As September rolls into Silverthorne, the days begin to shorten, with approximately 12 hours of daylight marking a gentle transition from the glorious long days of summer. This month represents a notable shift from August's 13 hours, kicking off a gradual decline that continues into the heart of autumn. Following the vibrant months of May through July, when daylight peaked at 14 hours, September signals a return to shorter days, reminiscent of the winter months ahead. This rhythm of daylight not only highlights nature's cycles but also invites residents to savor the last warm days of the year before the chill sets in, ushering in a cozy season of change.
As the summer winds down in Silverthorne, September brings a gentle breeze with an average wind speed of 2.0 m/s (5 mph), slightly lower than the preceding months. This gradual decline in wind speeds reveals a trend of diminishing gusts as the year progresses, with July marking the seasonal low at 1.9 m/s (4 mph). The transition from summer to autumn is evident, as September’s winds whisper the promise of cooler days ahead. As the leaves prepare to change, these soft breezes serve as a reminder of the calm nature that envelops Silverthorne during this time, contrasting with the brisk winds that typically grace the later months of the year.
The weather in Silverthorne 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 Silverthorne and find detailed weather information for every month.
September and January present stark contrasts in weather conditions. In September, temperatures range from a chilly -8°C (17°F) at night to a pleasant max of 23°C (74°F) during the day, with an average of 9°C (48°F). The month experiences 36 mm (1.4 inches) of precipitation over about 8 days, coupled with relatively moderate humidity at 65%. In contrast, January is characterized by much colder conditions, with minimum temperatures plunging to -26°C (-14°F) and maximums only reaching 6°C (43°F), averaging -10°C (15°F). Precipitation slightly increases to 42 mm (1.6 inches) over 9 days, but the humidity rises significantly to 88%, making for a noticeably different atmosphere. For more details, you can check Silverthorne weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a chilly -8°C (17°F) at their lowest to a pleasant max of 23°C (74°F), with an average around 9°C (48°F). The month sees about 36 mm (1.4 in) of precipitation over 8 days, and humidity hovers around 65%. In contrast, February is significantly colder, with temperatures dropping to a minimum of -27°C (-17°F) and peaking at just 10°C (49°F), leading to an average of -9°C (16°F). Precipitation increases to 59 mm (2.3 in) across 14 days, accompanied by higher humidity levels at 87%. For a deeper look at February weather specifics, you can check Silverthorne weather in February.
In September, temperatures are milder with a minimum of -8°C (17°F) and an average of 9°C (48°F), peaking at a comfortable maximum of 23°C (74°F). The month experiences relatively low precipitation of 36 mm (1.4 in) over 8 days, with a humidity level of 65%. Conversely, March is considerably colder, with minimum temperatures dropping to -24°C (-11°F) and an average of -5°C (24°F), while the maximum reaches only 10°C (50°F). Precipitation is higher in March at 70 mm (2.7 in) spread across 13 days, contributing to a higher humidity level of 81%. For more details on March weather, check Silverthorne weather in March.
September and April exhibit significantly different weather patterns. In September, temperatures range from a minimum of -8°C (17°F) to a comfortable maximum of 23°C (74°F), with an average of 9°C (48°F). The month typically sees about 36 mm (1.4 in) of precipitation over around 8 days and maintains a humidity level of 65%. In contrast, April experiences colder temperatures, with lows dipping to -20°C (-4°F) and highs only reaching 12°C (54°F), averaging at -2°C (29°F). This month is also wetter, with 80 mm (3.2 in) of precipitation spread over approximately 13 days and higher humidity at 76%. For a more detailed look at April weather, check out Silverthorne weather in April.
When comparing the weather in September and May, notable differences emerge in temperature and precipitation. September tends to be milder, with average temperatures around 9°C (48°F) and a maximum of 23°C (74°F), while May is cooler, averaging 2°C (36°F) and peaking at 20°C (67°F). Furthermore, September experiences less rainfall, totaling 36 mm (1.4 in) over 8 days, compared to May's 76 mm (3.0 in) over 12 days. Both months have similar humidity levels, hovering around 65-66%. For more details on May weather in Silverthorne, check out Silverthorne weather in May.
In September, temperatures can range from a chilly -8°C (17°F) to a comfortable 23°C (74°F), with an average of 9°C (48°F). The month sees around 36 mm (1.4 in) of precipitation over about 8 days and experiences a humidity level of 65%. In contrast, June offers slightly warmer weather, with similar minimum temperatures at -8°C (19°F) and maximums reaching up to 25°C (78°F), alongside an average of 9°C (48°F). Precipitation in June is slightly higher at 43 mm (1.7 in) over 7 days, and humidity levels are lower at 58%. For more detailed information, you can check Silverthorne weather in June.
September and July in Silverthorne showcase contrasting weather patterns. In September, temperatures range from a chilling minimum of -8°C (17°F) to a comfortable maximum of 23°C (74°F), with an average temperature of 9°C (48°F). The month experiences about 36 mm (1.4 in) of precipitation over 8 days, combined with a higher humidity of 65%. In contrast, July tends to be milder, with temperatures ranging from -2°C (29°F) to a maximum of 24°C (76°F) and an average of 13°C (55°F). July is wetter, with 59 mm (2.3 in) of rainfall over 12 days, yet has a lower humidity level of 52%. For more details on July's weather, you can visit Silverthorne weather in July.
In September, temperatures begin to cool significantly, with a minimum temperature of -8°C (17°F) and an average of 9°C (48°F), compared to August's milder minimum of 1°C (34°F) and average of 12°C (54°F). Both months experience similar maximum temperatures, with September reaching up to 23°C (74°F) and August slightly higher at 24°C (75°F). Precipitation also shows a slight decrease in September with 36 mm (1.4 in) over 8 days, while August recorded 43 mm (1.7 in) across 9 days. Additionally, September's humidity is higher at 65% compared to August's 56%. For more detailed information about August weather, you can visit Silverthorne weather in August.
September enjoys a milder climate with average temperatures hovering around 9°C (48°F) and a max reaching up to 23°C (74°F), while October sees a notable drop, with average temperatures plummeting to 0°C (32°F) and highs of only 19°C (66°F). In terms of precipitation, October receives significantly more rainfall at 61 mm (2.4 in) over 10 days, compared to September’s 36 mm (1.4 in) across 8 days. Additionally, humidity rises in October to 76% from September's 65%, creating a noticeably damp atmosphere. For more detailed insights on October's weather patterns, check out Silverthorne weather in October.
In September, the weather in Silverthorne features a mild temperature range with a minimum of -8°C (17°F) and a comfortable maximum of 23°C (74°F), yielding an average temperature of 9°C (48°F). The month experiences relatively low precipitation at 36 mm (1.4 in) over about 8 days, with humidity at 65%.
In contrast, November brings significantly colder conditions, with temperatures dropping to a minimum of -26°C (-15°F) and peaking at 10°C (50°F), resulting in a chilly average of -6°C (22°F). Precipitation slightly increases to 42 mm (1.7 in) over the same number of days, but humidity rises to 82%, contributing to a more pronounced sense of cold. For a more detailed look at November weather, you can check Silverthorne weather in November.
The weather in September is notably milder, with temperatures ranging from a minimum of -8°C (17°F) to a maximum of 23°C (74°F) and an average of 9°C (48°F). In contrast, December experiences much colder conditions, with temperatures plummeting to as low as -28°C (-18°F) and an average of -10°C (14°F). Precipitation levels are slightly higher in December, totaling 43 mm (1.7 in) over 10 days, compared to September's 36 mm (1.4 in) over 8 days. Notably, December’s humidity is significantly higher at 89%, which adds to the chill of the winter air. For more detailed information, you can check Silverthorne weather in December.
As September transitions in Silverthorne, it brings a refreshing change in weather patterns compared to the preceding summer months. Daytime temperatures can still peak at a comfortable 23°C (74°F), but they dip significantly at night, providing a crisp backdrop against the stunning fall foliage. This month also marks an increase in precipitation, with about 36 mm (1.4 in) falling over eight days, lending life to the vibrant colors of autumn. With a humidity level hovering around 65%, the air feels decidedly brisk and invigorating. Embrace the invigorating charm of September and prepare for a delightful shift in the landscape as you explore the wonders of nature. For more details, visit Silverthorne Climate.