Last updated: February 24, 2025
In September, Bend, United States experiences a dynamic blend of weather conditions, making it a captivating time of year. Temperatures range from a scorching maximum of 37°C (98°F) to a cooler minimum of -1°C (30°F), with an average temperature settling at a pleasant 15°C (60°F). While sunshine is abundant, the month sees 29 mm (1.1 in) of precipitation spread over 5 days, indicating sporadic rain amidst mostly dry spells. With a relative humidity of 57%, the air remains comfortably refreshing, perfect for outdoor adventures and enjoying the stunning natural scenery of this picturesque region.
In Bend, Oregon, September heralds the transition from the warmth of summer to the crisp embrace of autumn. With temperatures ranging from a chilly -1°C (30°F) at night to a comfortable 37°C (98°F) during the day, the month showcases a significant variation that caters to both warm afternoons and cooler evenings. The average temperature of 15°C (60°F) hints at the gradual cool-down, providing a gentle reprieve from the sweltering summer months. As daily highs remain elevated yet start their decline, September serves as a delightful prelude to the cooler months ahead, capturing the essence of early fall while retaining a taste of summer’s lingering warmth.
September marks a transitional phase in Bend, with precipitation averaging 29 mm (1.1 in) over approximately 5 days. This increase from the dry summer months of July and August reflects the gradual shift towards fall, as the region begins to receive more moisture. While the amount is still modest compared to earlier months like February and November, it signals the end of the arid season and prepares the landscape for the vibrant autumn colors. This moderate rainfall not only supports the local ecosystem but also sets the stage for the wetter conditions expected in the upcoming months, making September a crucial turning point in Bend's climatic pattern.
As summer gives way to fall in Bend, United States, September ushers in a noticeable decline in humidity, dropping to a refreshing 57%. This marks a significant shift from the previous months, where humidity levels hovered above 60% during the sweltering summer, peaking at 60% in August. The transition reflects a broader trend of decreasing humidity as autumn approaches, with levels consistently higher in the winter months, averaging around 87% from January to April. This seasonal ebb and flow not only enhances the crispness of the air but also sets the stage for the vibrant colors of fall, making September a delightful time to experience the natural beauty of Bend's landscape.
As September rolls in, Bend experiences a slight decrease in UV intensity compared to the peak summer months, with the UV Index settling at 8—a mark categorized as very high. This means that while you can enjoy the lingering warmth of summer, UV exposure still poses significant risks, necessitating precautions to protect your skin. With a burn time of just 15 minutes under direct sunlight, it’s essential to be mindful of sun safety, especially as days shorten and outdoor activities remain popular. This month's index showcases a downward trend from the extreme levels of June and July, yet caution is still advised for those venturing outdoors. For more insights on UV exposure in Bend, check out Bend UV Index.
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As summer gracefully transitions into autumn, September brings a delightful 301 hours of sunshine to Bend, United States. This marks a beautiful tapering off from the peak summer months, where July dazzles with an impressive 409 hours of sun. Following August's warm embrace of 365 hours, September maintains a generous glow that hints at the forthcoming cooler days. Despite the gradual decrease in daylight as the year progresses—dropping to 251 hours in October and 180 hours in November—September stands out as a time of balance, where the warmth of summer lingers just a little longer, inviting residents and visitors alike to savor the crisp, sunny days before winter settles in.
As summer transitions into autumn, September in Bend, United States continues to bask in relatively sunny conditions, boasting a 72% chance of clear skies. This period marks a notable shift from the peak sunshine of July and August, where the likelihood of sun reaches highs of 81% and 77%, respectively. As we move through the year, September maintains a strong position within the seasonal spectrum, outpacing months like April and May, which offer 60% and 50% sunny days. This trend emphasizes Bend's reputation as a sunlit haven, especially during the late summer, making September an ideal time for outdoor activities while the weather remains pleasantly warm.
As summer draws to a close in Bend, September offers a gentle transition from the sun-soaked days of July and August, with daylight hours totaling 12 hours. This month marks a subtle decline from the peak of 15 hours found during midsummer, reflecting a shift towards autumn. The lengthening shadows hint at the coming chill, yet the lingering warmth invites residents to savor the outdoors as evenings begin to draw in. This gradual reduction in daylight continues a seasonal trend, leading into October's cooler, shorter days of 10 hours. Embracing this beautiful shift reminds us of nature's rhythm, encouraging us to relish each moment of light before the winter solstice approaches.
As summer gracefully transitions into autumn, September in Bend experiences a gentle decline in wind speed, with an average of 2.4 m/s (5 mph). This marks one of the year's calmest months, reflecting a noticeable drop from the breezier summer days. The slight decrease continues the downward trend observed since late spring, where winds were slightly stronger. However, as the seasons shift into October, the wind speeds begin to pick up again, hinting at the changes to come. This seasonal rhythm in Bend underscores the tranquil yet dynamic climate of the region, making September a perfect time for outdoor activities without the disruptive gusts of earlier months.
The weather in Bend 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 Bend and find detailed weather information for every month.
In comparing the weather between September and January, September offers a much warmer climate with average temperatures around 15°C (60°F), peaking at a sweltering 37°C (98°F) on the hottest days. This month experiences relatively low precipitation at 29 mm (1.1 in) over about 5 days and has a moderate humidity level of 57%. In contrast, January brings much colder temperatures, with an average of just 1°C (33°F) and minimums plunging to -24°C (-11°F). This winter month is also wetter, with 69 mm (2.7 in) of precipitation spread over approximately 12 days, resulting in higher humidity levels of 87%. For more detailed insights on January weather, check out Bend weather in January.
September and February offer stark contrasts in weather conditions. In September, temperatures can range from a chilly -1°C (30°F) at night to a warm maximum of 37°C (98°F), with an average of 15°C (60°F). The month sees relatively low precipitation at 29 mm (1.1 in) over about 5 days, with humidity levels around 57%. In contrast, February is much colder, with minimum temperatures plunging to -18°C (0°F) and an average of just 1°C (33°F), peaking at 17°C (62°F). This month experiences significantly higher precipitation at 82 mm (3.2 in) spread over 15 days, and a much higher humidity of 87%. For more details on the February weather, you can check Bend weather in February.
September and March exhibit notably different weather patterns. In September, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 37°C (98°F), with an average of 15°C (60°F) and relatively low humidity at 57%. Precipitation is minimal, totaling 29 mm (1.1 in) over just five days. In contrast, March experiences colder conditions, with temperatures dipping as low as -14°C (7°F) and peaking at 20°C (68°F), resulting in a much lower average of 3°C (38°F). This month sees more precipitation—56 mm (2.2 in)—spread over 13 days, along with significantly higher humidity at 87%. For more detailed insights, check out Bend weather in March.
When comparing the weather of September and April, notable differences emerge in temperature and precipitation patterns. September typically features a wider temperature range, with minimums around -1°C (30°F) and maximums soaring up to 37°C (98°F), averaging 15°C (60°F) for the month. In contrast, April is considerably cooler, with minimum temperatures plummeting to -8°C (18°F) and maximums reaching only 28°C (83°F), averaging 7°C (45°F). Precipitation is also more frequent in April, with 54 mm (2.1 in) over 11 days compared to September's 29 mm (1.1 in) over just 5 days. Additionally, April experiences higher humidity at 86%, compared to September's 57%. For more details, check out Bend weather in April.
September and May exhibit notable differences in weather patterns. In September, temperatures range from a chilly minimum of -1°C (30°F) to a scorching maximum of 37°C (98°F), with an average of 15°C (60°F). The month sees less precipitation, totaling 29 mm (1.1 in) over about 5 days, and the humidity is relatively moderate at 57%. In contrast, May has a cooler minimum temperature of -4°C (25°F) and a lower average of 12°C (53°F), with highs reaching up to 31°C (88°F). May also experiences slightly more precipitation at 36 mm (1.4 in) across 9 days, coupled with increased humidity at 79%. For more detailed information, check out Bend weather in May.
In comparing September and June weather, September features a broader temperature range, with a minimum of -1°C (30°F), an average of 15°C (60°F), and a maximum of 37°C (98°F). In contrast, June has slightly warmer temperatures, recording a minimum of 1°C (33°F), an average of 16°C (61°F), and a maximum of 41°C (107°F). Both months experience similar levels of precipitation, with September at 29 mm (1.1 in) over 5 days and June at 27 mm (1.1 in) over 7 days. However, June has significantly higher humidity at 80%, compared to September's 57%. For more details on June weather in Bend, you can explore Bend weather in June.
When comparing the weather in September to that of July, September showcases a wider temperature range, with minimums dropping to -1°C (30°F) and maximums reaching up to 37°C (98°F). This contrasts with July, where temperatures generally stay warmer, with minimums at 2°C (37°F) and maximums capping at 36°C (98°F). September also experiences more precipitation, with 29 mm (1.1 in) over 5 days, compared to July's lighter 7 mm (0.3 in) over just 2 days. Additionally, September's humidity is lower at 57%, while July remains more humid at 77%. For a more detailed look at July's conditions, check out Bend weather in July.
In comparing the weather between September and August, we observe notable differences in temperature and precipitation patterns. September experiences a wider temperature range, with a minimum of -1°C (30°F) and a maximum reaching 37°C (98°F), while August maintains a milder range, with temperatures spanning from 3°C (37°F) to a maximum of 38°C (100°F). The average temperature in September is cooler at 15°C (60°F) compared to August's warmer average of 20°C (69°F). Additionally, September sees more precipitation over five days (29 mm or 1.1 in) compared to August, which only registers 13 mm (0.5 in) over three days. Humidity levels are slightly lower in September at 57%, compared to 60% in August. For more details, you can check Bend weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a low of -1°C (30°F) to a high of 37°C (98°F), with an average of 15°C (60°F), offering a warm and variable climate. Precipitation is relatively low at 29 mm (1.1 in) over 5 days, and humidity levels hover around 57%. In contrast, October experiences cooler temperatures, dipping to a minimum of -9°C (15°F) and averaging 8°C (47°F), with a maximum of 30°C (86°F). Additionally, October sees an increase in precipitation to 37 mm (1.5 in) over the same number of days, along with a rise in humidity to 76%. For more detailed information, check out Bend weather in October.
September and November present a striking contrast in weather patterns. In September, temperatures range from a chilly -1°C (30°F) at night to a warm 37°C (98°F) during the day, resulting in an average temperature of 15°C (60°F). Rainfall is relatively light, with about 29 mm (1.1 in) over five days, and humidity sits at a moderate 57%.
Conversely, November sees a significant drop in temperatures, with nighttime lows dipping to -17°C (2°F) and daytime highs reaching only 22°C (71°F), culminating in an average of 4°C (39°F). Precipitation increases to 59 mm (2.3 in) over ten days, and the humidity climbs notably to 87%. For more details on November weather, check out Bend weather in November.
September and December present contrasting weather patterns. In September, temperatures vary more dramatically, with a minimum of -1°C (30°F) and a maximum of 37°C (98°F), resulting in an average of 15°C (60°F) and relatively low precipitation at 29 mm (1.1 in) over just 5 days. In contrast, December brings much colder conditions, with temperatures ranging from a frigid -17°C (2°F) to a relatively mild 18°C (65°F), averaging around 0°C (33°F). Precipitation increases significantly to 67 mm (2.6 in) over 12 days, along with a higher humidity level of 88%. For more details on December's weather, you can check Bend weather in December.
As summer gracefully transitions into fall, September in Bend presents a fascinating blend of temperature extremes and refreshing conditions. With the warmest days reaching up to 37°C, the late afternoon sun still encourages outdoor adventures, yet the cooler nights can dip close to freezing, allowing a taste of the crisp autumn air to come. While September sees only modest precipitation, averaging five rainy days, the humidity settles at a comfortable 57%, striking a pleasant balance. This month stands out with its variability, making it a perfect time to experience the shifting seasons. For more detailed insights, visit Bend Climate.