Last updated: February 24, 2025
October weather in Sun Valley, United States, showcases a striking contrast, with temperatures ranging from a brisk minimum of -24°C (-11°F) to a pleasant maximum of 22°C (71°F). The average temperature settles around 2°C (35°F), marking the transition into cooler autumn days. This month experiences a relatively modest precipitation of 42 mm (1.6 in) over just 7 days, with the humidity hovering at a comfortable 64%. As the fall colors peak, Sun Valley transforms into a stunning landscape, offering both beautiful scenery and crisp mountain air.
As October rolls into Sun Valley, the region experiences a striking transition in temperatures that marks the shift from crisp fall days to the onset of winter. With a minimum temperature of -24°C (-11°F), the chill becomes palpable, while the average hovers around 2°C (35°F), offering a brisk atmosphere perfect for enjoying autumnal activities. The maximum temperature can reach a pleasant 22°C (71°F), allowing for the occasional warm day that beckons outdoor exploration. This month stands out for its dramatic nightly drops, hinting at the colder months ahead while still providing opportunities to relish the vibrant foliage and breathtaking landscapes characteristic of this beautiful season.
October in Sun Valley marks the transition into autumn, bringing a moderate precipitation total of 42 mm (1.6 in) over approximately 7 days. This amount is consistent with the earlier months of fall, showcasing a slight increase from September’s 30 mm (1.2 in), yet remains lower than the wetter winter months that follow. As temperatures cool, the frequency of rainy days rises gradually; however, October still experiences less rain than the peak months of January and February. This pattern suggests a gradual shift from the drier summer months, which saw only 15 mm in July and 33 mm in August, to a wetter season that sets the stage for the coming snow. Overall, October serves as a gentle reminder of nature's transition, balancing the precipitation levels as it prepares Sun Valley for winter.
As October arrives in Sun Valley, the air embraces a distinct shift, with humidity levels hovering around 64%. This marks a subtle increase from the 42% humidity experienced in August, signaling the transition into the cooler, more moisture-rich months ahead. The trend clearly showcases that as the seasons change, humidity gradually rises from the summer's dry spell, culminating in a more comfortable, albeit slightly damp, autumn atmosphere. As the region moves toward winter, October’s humidity serves as a reminder of the upcoming chill, contrasting starkly with the high humidity levels seen in January and February, which often hover around 91% and 92% respectively. Overall, October stands as a bridge between the dry warmth of summer and the moist cold of winter, offering a refreshing ambiance ideal for enjoying the fall foliage.
As October arrives in Sun Valley, the UV Index registers at 6, categorizing it as high, with a burn time of approximately 25 minutes. This indicates a shift towards lower UV intensity compared to the summer months, where the index peaked at a jaw-dropping 12 in June. While October's UV levels are continued reminders to protect your skin, they are much more manageable compared to the extreme conditions experienced earlier in the season. This month strikes a balance, offering ample opportunity for outdoor activities while still necessitating vigilance against sun exposure. For a detailed understanding of the UV Index trends throughout the year, check out Sun Valley UV Index.
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In Sun Valley, October ushers in a delightful shift as the crisp air replaces the lingering warmth of summer. With 264 hours of sunshine, this month reflects a gradual decline from the peak of July, which boasts an impressive 402 hours. As autumn settles in, daylight begins to dim, yet the vibrant colors of changing leaves illuminate the landscape, creating a breathtaking backdrop. After the burgeoning May days, which bask in a glorious 352 hours, October offers a more subdued but still pleasantly bright atmosphere, paving the way for the winter months ahead. This transition from the sun-soaked summer to the tranquil fall captures the essence of the season, making Sun Valley a picturesque spot for those wishing to relish in October’s unique charm.
As October rolls in, the likelihood of sunny weather in Sun Valley experiences a noticeable dip, with a 42% chance of sunshine. This marks a significant decrease from the previous month of September, which boasts an impressive 82% chance of clear skies. The trend reveals that while the summer months, particularly June, July, and August, enjoy the highest probabilities of sunshine, October transitions the Valley into a cooler season, where sunny days become less frequent. However, this month's sunshine potential remains brighter than the winter months ahead, such as November and December, which see chances plunge to 38% and 27%, respectively. For those eager to embrace the fall colors, October still offers opportunities for golden, sunlit days, even if they come with a little less frequency.
As autumn unfolds in Sun Valley, the daylight duration begins to wane, resulting in an average of 10 hours of daylight in October. This gradual decline follows the peak summer months, where June and July enjoy the longest days, boasting 15 hours of sunlight. As the year progresses, daylight hours steadily decrease, with October marking a notable transition from the vibrant summer evenings to the shorter, cooler days of late fall. This trend continues into November, where daylight dips to 9 hours, resembling the winter months of January and December, which offer just 9 and 8 hours of daylight respectively. Thus, October serves as a reminder of nature's rhythmic cycle, gently ushering in a cozy, contemplative season as the landscape transitions into winter.
As October unfolds in Sun Valley, residents and visitors can expect a gentle breeze, with average wind speeds reaching 2.1 m/s (5 mph). This marks a slight increase compared to the more tranquil conditions seen in the preceding months of July and August, both averaging 2.0 m/s. Interestingly, this steady wind pattern reflects a late-season revival in breeziness, consistent with September’s measurements. The crisp October air, coupled with a refreshing breeze, sets the perfect backdrop for autumn activities against a stunning alpine landscape. Looking ahead, November is predicted to bring a minor dip back to 1.8 m/s, showcasing the region's characteristic ebb and flow of wind, creating a dynamic atmospheric experience throughout the year.
The weather in Sun Valley changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Sun Valley and find detailed weather information for every month.
October and January exhibit stark contrasts in weather conditions. October is characterized by a wide temperature range, with minimums reaching -24°C (-11°F), average temperatures around 2°C (35°F), and maximums peaking at 22°C (71°F). This month sees moderate precipitation of 42 mm (1.6 in) over approximately 7 days, paired with a humidity level of 64%. In comparison, January's temperatures drop significantly, with minimums hitting -27°C (-16°F) and an average of -8°C (17°F), only rising to a maximum of 2°C (36°F). Precipitation increases to 56 mm (2.2 in) across 10 days, and the humidity rises considerably to 91%. The marked differences suggest that while October offers milder and more variable weather, January is colder and more consistently wet. For further details, check out Sun Valley weather in January.
When comparing the weather in October and February, one can observe significant differences in temperature and precipitation. October experiences milder conditions with an average temperature of 2°C (35°F), ranging from a low of -24°C (-11°F) to a high of 22°C (71°F). In contrast, February is marked by colder temperatures, averaging -8°C (18°F), with a minimum of -22°C (-8°F) and a maximum of just 6°C (42°F). Additionally, February sees more rainfall, accumulating 86 mm (3.4 in) over 13 days compared to October's 42 mm (1.6 in) over 7 days. The humidity level is noticeably higher in February, reaching 92%, while October has a more moderate humidity of 64%. For more detailed insights on February's weather, you can refer to Sun Valley weather in February.
When comparing the weather in October and March, October tends to have a more varied temperature range, with an average of 2°C (35°F) and a maximum of 22°C (71°F), while March has a colder average of -3°C (26°F) and a maximum of 10°C (50°F). Both months experience notable changes in precipitation, with March seeing 60 mm (2.4 in) over 12 days compared to October's 42 mm (1.6 in) over just 7 days. Additionally, March has higher humidity levels at 85%, compared to October's 64%. This makes March feel much damp and chilly, particularly during extended periods of precipitation. For more details, you can check Sun Valley weather in March.
In comparing the weather of October and April, October generally offers a wider temperature range, with a minimum of -24°C (-11°F) and a maximum of 22°C (71°F), resulting in an average temperature of 2°C (35°F). In contrast, April presents a slightly warmer minimum of -16°C (3°F) and a peak of 14°C (57°F), leading to an average of 0°C (31°F). While October experiences about 42 mm (1.6 in) of precipitation over 7 days, April sees a bit more at 52 mm (2.0 in) across 11 days, coupled with higher humidity levels in April at 76%, compared to October's 64%. For those interested in a more detailed look at April conditions, check out Sun Valley weather in April.
In October, temperatures can vary significantly, with a minimum of -24°C (-11°F) and a maximum of 22°C (71°F), leading to an average temperature of around 2°C (35°F). The month experiences about 42 mm (1.6 in) of precipitation over approximately 7 days, and humidity hovers around 64%. In contrast, May sees milder temperatures, ranging from a minimum of -12°C (10°F) to a maximum of 24°C (75°F), resulting in an average of 4°C (40°F). The month is also wetter, accumulating 61 mm (2.4 in) of precipitation over roughly 13 days, with a slight increase in humidity to 66%. For a more detailed comparison of weather patterns, check out Sun Valley weather in May.
October and June present quite different weather patterns. In October, temperatures can range dramatically from a minimum of -24°C (-11°F) to a maximum of 22°C (71°F), with an average temperature around 2°C (35°F). The month sees about 42 mm (1.6 in) of precipitation over 7 days, and the humidity is relatively high at 64%. In contrast, June boasts milder conditions, with minimum temperatures around -4°C (24°F) and a maximum of 28°C (82°F), yielding an average of 11°C (52°F). Despite slightly higher precipitation at 46 mm (1.8 in) over 9 days, June remains more pleasant with lower humidity at 62%. For a closer look at June conditions, check out Sun Valley weather in June.
The weather in October contrasts significantly with that of July, showcasing a dramatic shift in temperatures and conditions. In October, temperatures range from a chilly minimum of -24°C (-11°F) to a pleasant maximum of 22°C (71°F), while the average settles around 2°C (35°F). This month also brings higher precipitation, totaling 42 mm (1.6 in) over approximately seven days, coupled with a moderate humidity level of 64%.
In comparison, July presents more temperate weather, with minimum temperatures around 0°C (32°F) and maximums reaching up to 28°C (83°F). The average temperature for July is much milder at 16°C (62°F), and it only experiences 15 mm (0.6 in) of precipitation over four days, with a lower humidity of 53%. For a closer look at July's weather details, visit Sun Valley weather in July.
In comparing the weather of October and August, October presents a much wider temperature range, with minimums plummeting to -24°C (-11°F) and maximums reaching up to 22°C (71°F). In contrast, August enjoys milder conditions, with temperatures ranging from a low of -3°C (27°F) to a high of 30°C (86°F), making it the warmer of the two months. Precipitation is slightly higher in October at 42 mm (1.6 in) compared to 33 mm (1.3 in) in August, though both months experience a similar frequency of rainy days. Additionally, October's humidity sits at 64%, considerably more humid than August's 42%. For more detailed insights, check out Sun Valley weather in August.
In October, the weather in Sun Valley shows a notable shift from September, with a wider temperature range that includes a chilly minimum of -24°C (-11°F) and an average temperature dropping to 2°C (35°F). In comparison, September offers milder conditions with a minimum of -13°C (10°F) and an average temperature of 10°C (51°F), peaking at a warmer 29°C (84°F). Precipitation also increases slightly in October to 42 mm (1.6 in) over 7 days, while September sees 30 mm (1.2 in) across just 5 days. Additionally, humidity rises in October to 64%, compared to September’s 46%. For more details on the weather patterns, you can visit Sun Valley weather in September.
October and November present a notable shift in weather patterns. In October, temperatures fluctuate from a chilly minimum of -24°C (-11°F) to a pleasant average of 2°C (35°F), peaking at a maximum of 22°C (71°F). The month experiences about 42 mm (1.6 in) of precipitation over approximately 7 days, with a humidity level averaging 64%.
In contrast, November sees a drop in average temperatures, ranging from a minimum of -23°C (-10°F) to an average of -4°C (26°F), with a maximum temperature of 12°C (55°F). This month also becomes slightly wetter, with 46 mm (1.8 in) of precipitation over around 9 days and a higher humidity level of 83%. For more details, check Sun Valley weather in November.
In October, the weather transitions from mild to chilly, with average temperatures around 2°C (35°F) and a maximum of 22°C (71°F). Precipitation is moderate at 42 mm (1.6 in) over about 7 days, while humidity holds at 64%. In contrast, December brings more severe winter conditions, with average temperatures dropping to -9°C (16°F) and a maximum of only 8°C (46°F). The month experiences slightly higher precipitation at 49 mm (1.9 in) over 10 days and increased humidity at 87%. For a detailed forecast of what to expect, you can visit Sun Valley weather in December.
As October rolls into Sun Valley, the weather transitions dramatically from the lingering warmth of summer to the crisp embrace of fall. Daytime temperatures can reach a pleasant 22°C, offering opportunities for colorful autumn hikes, while the nighttime chill can plunge to a brisk -24°C, reminding us that winter is on the horizon. The average temperature settles around 2°C, marking a distinct shift from previous months. With about 42 mm of precipitation spread across seven days, October presents an ideal blend of golden leaves and refreshing rain, alongside a moderate humidity of 64% that adds to the season's enchanting atmosphere. For those looking to explore the climatic nuances of this delightful season, check out Sun Valley Climate.