Last updated: February 24, 2025
September in Twin Falls, United States, offers a dynamic weather experience characterized by a broad temperature range from a sizzling maximum of 39°C (103°F) to a cool minimum of 1°C (35°F), with an average temperature settling at a pleasant 19°C (66°F). This transition month witnesses only two days of precipitation, accumulating a modest 16 mm (0.6 in), while humidity hovers around 46%, creating a comfortable yet slightly dry atmosphere. Whether you’re enjoying the last warm days of summer or embracing the hint of fall, September in Twin Falls is a month of diverse climatic contrasts.
In September, Twin Falls experiences a noticeable transition as summer wanes, showcasing a comfortable range of temperatures. The month opens with a minimum of 1°C (35°F), while the average climbs to a pleasant 19°C (66°F), reflecting the lingering warmth of the season. Highs can still reach a sizzling 39°C (103°F), echoing the peaks seen in the height of summer, albeit with cooler nights that hint at the approaching fall. This balance of warm days and cooler evenings provides a refreshing contrast, making September a delightful time to enjoy the outdoors as the landscape begins to shift. Overall, the month serves as a beautiful bridge between the sweltering summer and the crispness of autumn, inviting both relaxation and exploration.
In September, Twin Falls experiences a modest precipitation total of 16 mm (0.6 in), reflecting the transition into the fall season. This amount is consistent with the previous summer months, where rainfall remained sparse, particularly in July and August, which reported only 5 mm and 10 mm, respectively. Interestingly, September shares the same precipitation days as the preceding month, with just two days of rain. As the year progresses towards October, local weather patterns suggest an increase in moisture, with expected rainfall rising to 26 mm (1.0 in), highlighting a trend where the dry summer gives way to the wetter fall months. This gradual shift in precipitation underscores the initial stages of Twin Falls' seasonal transition, setting the stage for the wetter months ahead.
As summer concludes in Twin Falls, September sees a notable increase in humidity, rising to 46%. This marks a subtle shift from the notably dry conditions experienced in August, when humidity plummeted to 42%, the lowest point of the year. Following a trend of decreasing humidity from the spring months, where levels were comparatively higher—peaking at 76% in April—September serves as a transitional month. After the dry heat of summer, the air begins to regain some moisture, paving the way for the wetter conditions that dominate the fall and winter months ahead, where humidity levels typically escalate to the upper 80s by November.
As September rolls into Twin Falls, the UV Index remains notably high at a value of 9, categorizing exposure as very high with a burn time of just 15 minutes. This trend follows the patterns set by the summer months, where the UV Index peaks at 11 in June and July, signaling extreme sun exposure. While the intensity lessens slightly in September compared to July and August, sun safety remains paramount as we transition to fall. Interestingly, the UV Index will continue to decrease over the coming months, with October seeing a drop to 6. For a more detailed view of sun exposure throughout the year, visit Twin Falls UV Index to stay informed and protect your skin.
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September in Twin Falls shines brightly with 307 hours of sunlight, marking a delightful transition into the fall months. Following the peak summer months of June and July, which boast 377 and 391 hours respectively, September offers a comfortable balance of warmth and daylight, making it perfect for outdoor activities. As daylight begins to wane into October’s 262 hours, September serves as a gentle reminder of the summer’s lingering embrace while hinting at the cooler days ahead. This month reflects a gradual descent in sun exposure, yet it continues to bask in a generous amount of sunshine, fostering a vibrant atmosphere perfect for enjoying the natural beauty of Twin Falls.
As September rolls into Twin Falls, the likelihood of enjoying sunny weather reaches an impressive 87%, marking it as one of the brightest months of the year. This noticeable surge follows the summer months of June, July, and August, which also boast high percentages of sunny days, specifically 76%, 75%, and 77%, respectively. In contrast, the year begins with a gloomy 36% chance of sunshine in January, gradually increasing as the seasons change. This upward trend underscores September as a delightful transition into autumn, where the golden hues of fall meet abundant sunshine, creating the perfect backdrop for outdoor activities and events. As the sun begins to set earlier, September offers a final taste of summer bliss before the cooler months arrive.
As the summer sun begins to wane, September in Twin Falls, United States, marks a transition with approximately 12 hours of daylight. Following the peak of 15 hours in June, daylight gradually diminishes, echoing the cycle of the seasons. This month bridges the vibrant summer days and the cooler autumn nights, as daylight decreases gently from 13 hours in August. As we prepare for October, the shift towards shorter days is evident, with each passing month serving as a reminder of the changing landscape and rhythm of life in this picturesque region.
As summer fades into autumn, September in Twin Falls, United States, features a gentle average wind speed of 2.9 m/s (7 mph), slightly softer than the breezier months before. The trend reveals a gradual decrease in wind speeds from the highest winds of February at 4.8 m/s (11 mph), showcasing a shift towards the calmer conditions typical of late summer. Notably, July marks the lowest average at 2.7 m/s (6 mph), indicating a summer lull before September’s slight uptick. As we transition into October, the winds pick up marginally to 3.3 m/s (7 mph), suggesting a resurgence of breezy weather. These patterns signal a natural rhythm, where Twin Falls experiences a serene yet dynamic shift from the warmth of summer to the crispness of fall.
The weather in Twin Falls 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 Twin Falls and find detailed weather information for every month.
In September, the weather is generally warm, with average temperatures around 19°C (66°F) and peak highs reaching up to 39°C (103°F). This month experiences minimal precipitation, with just 16 mm (0.6 in) over approximately two days and a moderate humidity of 46%. In contrast, January presents a stark contrast, featuring much colder temperatures that can drop to a chilling minimum of -27°C (-16°F) and an average of -1°C (31°F). This winter month also sees significantly more precipitation, totaling 40 mm (1.6 in) over eight days, combined with high humidity levels at 91%. For more details on January conditions, you can refer to Twin Falls weather in January.
In September, temperatures in Twin Falls can range significantly, with a minimum of 1°C (35°F) and a maximum of 39°C (103°F), leading to an average of 19°C (66°F). The month experiences relatively low precipitation, with only 16 mm (0.6 in) over about 2 days and a humidity level of 46%. In contrast, February presents a much colder climate, featuring minimum temperatures dropping to -13°C (8°F) and a maximum of 18°C (64°F), resulting in an average temperature of just 1°C (34°F). This month experiences more precipitation, totaling 46 mm (1.8 in) over approximately 10 days, along with a much higher humidity of 92%. For more specifics on winter conditions, you can check Twin Falls weather in February.
The weather in September is characterized by a significant temperature range, with minimums around 1°C (35°F) and maximums reaching up to 39°C (103°F), creating warm and dry conditions, with only 16 mm of precipitation over just two days and a humidity level of 46%. In contrast, March experiences much cooler temperatures, ranging from a minimum of -9°C (15°F) to a maximum of 25°C (78°F), accompanied by more frequent precipitation at 39 mm over ten days and a much higher humidity of 85%. This stark difference highlights September's warmth and dryness compared to March's chill and dampness, making each month distinct in its climatic characteristics. For more details, check out Twin Falls weather in March.
When comparing the weather in September and April, notable differences emerge. September typically boasts warmer temperatures with a minimum of 1°C (35°F) and an average of 19°C (66°F), peaking at a scorching 39°C (103°F). In contrast, April experiences cooler conditions, with temperatures starting at a low of -5°C (23°F) and averaging just 10°C (50°F), with a maximum of 31°C (89°F). Additionally, September is relatively drier with only 16 mm (0.6 in) of precipitation spread across just 2 days, while April sees significantly more rain at 33 mm (1.3 in) over 8 days. The humidity also shifts notably, with September sitting at 46% compared to April's much higher 76%. For more detailed insights on April weather, you can visit Twin Falls weather in April.
September and May present quite distinct weather patterns. In September, temperatures range from a minimum of 1°C (35°F) to a maximum of 39°C (103°F), with an average of 19°C (66°F). The month typically experiences low precipitation, averaging just 16 mm (0.6 in) over about 2 days, and humidity is relatively comfortable at 46%. In contrast, May sees cooler conditions, with temperatures ranging from -1°C (30°F) to a maximum of 35°C (96°F) and an average of 15°C (59°F). May is also notably wetter, receiving around 39 mm (1.5 in) of rain across approximately 7 days, accompanied by higher humidity levels at 66%. For a more detailed look at the weather conditions in May, check out Twin Falls weather in May.
In comparing the weather between September and June, we see some notable differences. September typically features a minimum temperature of around 1°C (35°F), while June's minimum is slightly higher at 4°C (39°F). The average temperatures in September reach 19°C (66°F), but June enjoys a warmer average of 21°C (70°F). Both months can experience extreme maximum temperatures, hitting 39°C (103°F) in September and 39°C (102°F) in June. Precipitation levels are consistent in both months, with each receiving about 16 mm (0.6 in) over 2 days; however, June tends to be more humid at 62%, compared to September's 46% humidity. For a more detailed look, you can visit Twin Falls weather in June.
In comparing the weather of September and July, we see notable differences in temperature and humidity. September tends to have cooler minimum temperatures, dipping to around 1°C (35°F), while July has a higher minimum of 8°C (48°F). The average temperature in September is 19°C (66°F), significantly lower than July's warmer average of 26°C (80°F), although both months can reach similar maximum temperatures, with September peaking at 39°C (103°F) and July at 40°C (104°F). Precipitation levels are also different, with September receiving 16 mm (0.6 in) over 2 days compared to July's lighter rainfall of 5 mm (0.2 in) over just 1 day. Additionally, July exhibits a slightly higher humidity level at 53%, compared to September's 46%. For those interested in more details, you can check out Twin Falls weather in July.
In comparing the weather between September and August, September presents a cooler climate with average temperatures around 19°C (66°F), compared to August's warmer average of 25°C (76°F). While both months experience similar maximum temperatures, September's highest can reach 39°C (103°F), just shy of August's peak at 41°C (106°F). Precipitation is slightly more prevalent in September, with 16 mm (0.6 in) over 2 days, compared to 10 mm (0.4 in) in August, although both months see rain on the same number of days. Humidity levels remain comparable, with September at 46% and August slightly lower at 42%. For a more detailed look at August weather patterns, visit Twin Falls weather in August.
September and October exhibit notable differences in weather patterns. September experiences milder temperatures with a minimum of 1°C (35°F) and an average of 19°C (66°F), while October sees a significant drop, with temperatures ranging from a minimum of -12°C (10°F) to an average of 10°C (50°F). Precipitation also varies, as October records a higher amount of 26 mm (1.0 in) over four days compared to September's 16 mm (0.6 in) over just two days. Additionally, humidity levels in October rise to 64%, contrasting with September's lower humidity of 46%. For more detailed insights, check out Twin Falls weather in October.
In September, the weather is generally warm, with temperatures ranging from a minimum of 1°C (35°F) to a maximum of 39°C (103°F) and an average of 19°C (66°F). The month sees relatively low precipitation, with only 16 mm (0.6 in) over about 2 days and a humidity level of 46%. In contrast, November experiences much cooler temperatures, with a minimum of -9°C (16°F) and an average of 5°C (41°F), peaking at 24°C (75°F). This month is wetter, with 32 mm (1.2 in) of precipitation spread over 7 days and a significantly higher humidity of 83%. For more detailed insights into the weather during November, you can explore Twin Falls weather in November.
In September, the weather is markedly warmer, with temperatures ranging from a brisk 1°C (35°F) at night to a sizzling 39°C (103°F) during the day, and an average of 19°C (66°F). The month sees relatively little precipitation, with only 16 mm (0.6 in) falling over just 2 days, and humidity levels hovering around 46%. In contrast, December brings a significant drop in temperatures, with lows plummeting to -12°C (10°F) and a maximum of 16°C (60°F), averaging around 0°C (32°F). The month is much wetter, accumulating 39 mm (1.5 in) of rain spread across 8 days, accompanied by much higher humidity levels at 87%. For more detailed information, check out Twin Falls weather in December.
As September unfolds in Twin Falls, the weather begins to shift from the scorching summer heat, offering a more comfortable climate that strikes a balance between warm days and cool nights. With temperatures averaging around 19°C (66°F), this month represents a gentle transition, making outdoor activities more enjoyable. The notable drop in maximum temperatures, alongside only a couple of rain days, ensures that the humidity remains manageable at 46%. This is a refreshing contrast to the peak summer months, inviting residents and visitors alike to savor the crisp fall air. For a detailed look at seasonal changes, check out Twin Falls Climate.