Last updated: February 24, 2025
September in Leavenworth, United States, brings a delightful transition into autumn, with temperatures showcasing a maximum of 31°C (88°F) during the day and dropping to a cool average of 12°C (54°F) at night. While early fall offers a warm respite, the month also experiences chilly evenings, with lows dipping to -3°C (27°F). Rainfall is moderate, with 47 mm (1.9 in) recorded over 8 days, contributing to a humidity level of 62% that adds a refreshing crispness to the air. This blend of warmth and coolness, along with seasonal precipitation, creates an inviting atmosphere for both locals and visitors alike.
In September, Leavenworth begins to transition from the warm embrace of summer to the crispness of autumn. With temperatures ranging from a minimum of -3°C (27°F) to a maximum of 31°C (88°F), this month showcases a blend of warm days and cooler nights, evident in the average temperature of 12°C (54°F). As the month progresses, the warmth of August gradually ebbs, inviting the vibrant hues of fall foliage. This gradual cooling can be felt in the air, making September a delightful time for outdoor activities as summer heat gives way to refreshing weather, ideal for enjoying the stunning landscapes that Leavenworth has to offer.
In September, Leavenworth experiences a notable uptick in precipitation compared to the preceding summer months, recording 47 mm (1.9 in) over 8 days. This increase signals a shift toward the wetter autumn months, contrasting sharply with the almost dry conditions of July and August, which each averaged a mere 6 mm (0.2 in) across just one day of rain. As the days grow shorter and temperatures begin to cool, this moderate rainfall not only replenishes the landscape but also sets the stage for the more pronounced precipitation that occurs in October and beyond. With the fall season gathering momentum, September's weather acts as a gentle reminder of the changes ahead, hinting at a more dynamic atmospheric pattern for Leavenworth.
September in Leavenworth ushers in a notable shift in humidity, dropping to 62%, marking it as one of the drier months of the year. This decline contrasts sharply with the oppressive moisture felt in the earlier months, particularly from January to March when levels hover around 86% to 87%. As summer wanes, the humidity dips further from August’s 63%, indicating a gradual transition into the crisper fall season. October sees a rebound to 83%, suggesting that while September provides a brief respite from humidity, the lush, moist air of autumn is just around the corner. Overall, this pattern illustrates a seasonal ebb and flow, painting September as a refreshing interlude.
In September, Leavenworth experiences a very high UV Index of 8, indicating a significant need for sun protection during outdoor activities, with a burn time of just 15 minutes. This trend marks a slight decline from the peak summer months of July and August, which both maintained an identical UV Index of 10. As the season transitions into autumn, the UV exposure begins to taper off, yet caution remains imperative. The readings illustrate a clear pattern in Leavenworth’s UV Index throughout the year, starting from the low levels in January and gradually escalating to the very high categories of late spring and summer, before receding in fall. To learn more about how UV levels fluctuate throughout the year in Leavenworth, visit Leavenworth UV Index.
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As summer gradually melts into autumn, September in Leavenworth, United States, brings a moderate retreat in sunlight with approximately 281 hours of sunshine. This marks a noteworthy decline from the record-breaking brightness of July, which basks in 410 hours of sunlight, but still offers a generous warmth as the days shorten. By comparison, September shines with significantly more light than the darker winter months, like November's 135 hours or December's mere 103 hours. This transitional month sets the stage for beautiful fall foliage, enveloped in a comforting, soft glow that invites both locals and visitors to revel in the crisp, sunny days before the chill of winter settles in.
As summer transitions to fall in Leavenworth, September brings a moderate 41% chance of sunny weather, offering a blend of warmth and crispness. This month sees a departure from the peak sunshine of July, where the probability soars to 79%, and experiences a cool-down from the earlier summer months. While sunny days are still enjoyable, notably lower than the summer highs, September retains a favorable outlook compared to the upcoming chill of October, which dips to just 28%. This trend highlights a charming shift in weather, inviting locals and visitors alike to relish the beauty of early autumn before the gray skies dominate the scene.
As September rolls in, Leavenworth experiences a noticeable shift in daylight duration, with the sun offering approximately 12 hours of light each day. This marks a gentle decline from the 14 hours seen in August, signaling the transition towards the shorter days of autumn. The month showcases a balance between the long, sun-filled days of summer and the approaching early sunsets of fall, inviting residents and visitors alike to savor those precious moments of daylight before they wane further. The gradual reduction in daylight serves as a reminder of the cyclical nature of the seasons, as September gracefully leads into the cozy days of October.
In September, the winds in Leavenworth begin to take on a subtly serene character, with an average speed of 1.8 m/s (4 mph). This gentle breeze, a slight dip from the more robust gusts of July at 2.6 m/s, heralds the transition from summer to the crispness of autumn. As the warmer months give way, the winds become less frequent yet remain a persistent companion, mirroring the gradual cooling of the season. Notably, September's winds maintain a moderate pace, similar to those in November, suggesting a seasonal consistency that invites outdoor exploration amidst the stunning fall foliage. This trend highlights not just a shift in weather but an invitation to embrace the changing landscape with all its vibrant hues.
The weather in Leavenworth 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 Leavenworth and find detailed weather information for every month.
September and January present starkly contrasting weather conditions. September enjoys a mild temperature range, with averages around 12°C (54°F) and highs reaching up to 31°C (88°F), while experiencing relatively moderate humidity at 62% and only 8 days of precipitation totaling 47 mm (1.9 in). In contrast, January is much colder, with temperatures plummeting to a minimum of -21°C (-6°F) and averaging -3°C (26°F). The winter month also sees significantly more precipitation, averaging 144 mm (5.7 in) over 16 days, and a notable increase in humidity at 86%. For a more detailed look at January weather patterns, you can visit Leavenworth weather in January.
September and February present stark contrasts in weather conditions. September typically enjoys a mild climate with temperatures ranging from a chilly minimum of -3°C (27°F) to a warm maximum of 31°C (88°F), resulting in an average of 12°C (54°F). With 47 mm of precipitation over about 8 days and a humidity level of 62%, it offers a relatively pleasant and varied atmosphere. In contrast, February is characterized by much colder conditions, featuring minimum temperatures plunging to -21°C (-5°F) and a maximum of just 7°C (46°F), leading to an average of -3°C (26°F). The month is significantly wetter, with 151 mm of precipitation spread over 18 days and a higher humidity level of 86%, resulting in a much more dreary and damp environment. For a detailed overview of February weather patterns, you can check out Leavenworth weather in February.
The weather in September contrasts significantly with that of March. In September, temperatures range from a chilly minimum of -3°C (27°F) to a warm maximum of 31°C (88°F), with an average of 12°C (54°F) and relatively low precipitation of 47 mm (1.9 in) over about 8 days. This results in a humidity level of 62%, creating a pleasant atmosphere.
In contrast, March experiences colder temperatures, with minimums plunging to -14°C (8°F) and a maximum of only 15°C (60°F), averaging around 0°C (33°F). It also sees more precipitation, totaling 86 mm (3.4 in) over 15 days, along with higher humidity at 87%. This shift in weather indicates a transition from late summer warmth in September to the chill of late winter in March. For more detailed insights into March weather, you can visit Leavenworth weather in March.
When comparing the weather in September and April, notable differences emerge in temperature and precipitation. September typically enjoys a milder climate, with average temperatures around 12°C (54°F) and a maximum of 31°C (88°F). In contrast, April's temperatures are cooler, peaking at 21°C (70°F) with an average of just 4°C (39°F). Moreover, April experiences more frequent precipitation, averaging 72 mm (2.8 in) over 13 days, compared to September's 47 mm (1.9 in) over 8 days. This results in a higher humidity level in April, reaching 84%, compared to September's 62%. For more details, you can visit Leavenworth weather in April.
When comparing the weather in September and May, there are notable differences in temperature and humidity. September enjoys a wider temperature range, with minimums dropping to -3°C (27°F), averaging around 12°C (54°F), and peaking at a warm 31°C (88°F). In contrast, May has similar minimum temperatures but a lower average of 9°C (49°F) and a maximum of 26°C (79°F), making it generally cooler during the day. Additionally, September has slightly less precipitation, totaling 47 mm (1.9 in) over 8 days, compared to May's 48 mm (1.9 in) spread over 10 days. May also experiences higher humidity at 81%, compared to September’s 62%, contributing to a sense of mugginess in the spring month. For more detailed information, check out Leavenworth weather in May.
In comparing the weather between September and June, we observe notable differences in temperature and humidity. September experiences a broader temperature range, with minimums dropping to -3°C (27°F) and maximums reaching up to 31°C (88°F), leading to an average of 12°C (54°F). In contrast, June boasts slightly higher minimum temperatures at -1°C (30°F) and can soar to a maximum of 37°C (98°F), also maintaining an average of 12°C (55°F). Humidity levels are noticeably higher in June at 82%, compared to September's 62%. Additionally, while September sees a bit more precipitation with 47 mm (1.9 in) over 8 days, June has less rainfall totaling 31 mm (1.2 in) within the same number of days. For more details, check out Leavenworth weather in June.
When comparing the weather in September and July, it's clear that both months exhibit distinct characteristics. September experiences a wider range of temperatures, with minimums dropping to -3°C (27°F) and maximums reaching up to 31°C (88°F), averaging around 12°C (54°F). Additionally, it sees moderate precipitation of 47 mm (1.9 in) over 8 days, while humidity is at a comfortable 62%.
In contrast, July tends to be warmer with a more consistent temperature range, featuring minimums of 3°C (38°F) and maximums peaking at 32°C (91°F), with an average of 16°C (61°F). These conditions are accompanied by significantly less rainfall, totaling only 6 mm (0.2 in) across just 2 days and higher humidity levels at 79%. For further details on July weather, you can check Leavenworth weather in July.
September's weather features a wider temperature range compared to August, with minimum temperatures dropping to -3°C (27°F) and maximums reaching up to 31°C (88°F). In contrast, August maintains a milder range, with minimums at 2°C (36°F) and maximums hitting 34°C (93°F). While September sees a notable increase in precipitation, totaling 47 mm (1.9 in) over 8 days, August remains exceptionally dry, recording just 6 mm (0.2 in) over a single day. Humidity levels remain fairly consistent, with September at 62% and August slightly higher at 63%. For more details on August conditions, visit Leavenworth weather in August.
The transition from September to October marks a significant shift in weather patterns. In September, temperatures range from a minimum of -3°C (27°F) to a warm maximum of 31°C (88°F), with an average of 12°C (54°F). The month sees a total precipitation of 47 mm (1.9 in) over 8 days, accompanied by a comfortable humidity of 62%. Conversely, October brings much cooler temperatures, with minimums dipping to -11°C (12°F) and an average of just 5°C (41°F), peaking at 22°C (72°F). This month also experiences higher precipitation, totaling 102 mm (4.0 in) over 12 days, as humidity rises to 83%. For a more detailed look at the weather specifics for October, you can refer to Leavenworth weather in October.
September and November weather present a stark contrast in temperature and precipitation. In September, temperatures typically range from a minimum of -3°C (27°F) to a comfortable average of 12°C (54°F), reaching a maximum of 31°C (88°F). The month experiences 47 mm (1.9 in) of precipitation over about 8 days, with humidity averaging around 62%. In contrast, November brings a significant drop in temperatures, with a minimum of -12°C (11°F) and an average of just 1°C (33°F), peaking at 12°C (54°F). The month is also much wetter, featuring 120 mm (4.7 in) of precipitation over 16 days, and a notable increase in humidity at 89%. For more detailed information, check out Leavenworth weather in November.
In comparing the weather between September and December, it's clear that significant changes occur as the year transitions into winter. September experiences milder temperatures with a minimum of -3°C (27°F) and an average of 12°C (54°F), while December plunges to much colder conditions, with a minimum of -22°C (-6°F) and an average of -3°C (27°F). Precipitation also varies notably; September sees 47 mm (1.9 in) of rain over approximately 8 days, whereas December experiences increased precipitation at 151 mm (5.9 in) spread over 18 days. Additionally, humidity levels rise from 62% in September to a higher 88% in December, contributing to a distinct wintery atmosphere. For more detailed information, check out Leavenworth weather in December.
As the warmth of summer fades, September in Leavenworth brings a charming shift in weather that sets the stage for autumn. With average temperatures falling to a comfortable 12°C (54°F), daily highs can still reach a pleasant 31°C (88°F), offering the perfect backdrop for outdoor activities amid the vibrant fall foliage. Rainfall slightly increases, with about 47 mm spread across roughly 8 days, hinting at the transition to a wetter season but adding to the refreshing ambiance. Amidst a moderate humidity level of 62%, this month stands out as a delightful blend of warmth and coolness that invites exploration. For a deeper insight into seasonal variations, explore the comprehensive details at Leavenworth Climate.