Last updated: February 24, 2025
August in Sisters, United States, reveals a dynamic climate marked by a maximum temperature soaring to 37°C (100°F), alongside a mild average temperature of 20°C (68°F). The month experiences a minimal precipitation of just 8 mm (0.3 in), spread across two days, offering a glimpse of the typically dry summer. With the humidity level at a comfortable 62%, residents and visitors can enjoy the warm, sunny days while being prepared for occasional light rain. Overall, August showcases the delightful warmth of the High Desert region, making it a perfect time for outdoor adventures.
In Sisters, United States, August marks the height of summer, showcasing a notable warmth with minimum temperatures averaging 0°C (33°F) and maximums peaking at 37°C (100°F). This month mirrors July’s warm embrace, maintaining an average temperature of 20°C (68°F), a stark contrast to the frigid winter months. As the year transitions from the cooler early months, we witness a steady rise in temperatures, peaking in June and July before August holds its own. Following August, the gradual decline in temperatures begins, ushering in the crispness of September. The overall trend highlights a distinct and gradual shift from biting cold to a sweltering summer, encapsulating the seasonal dynamics that define this region's climate.
In August, Sisters, United States, experiences a notable dip in precipitation, recording just 8 mm (0.3 in) of rainfall over a mere 2 days. This is a continuation of a dry period that begins in the summer months, with July tallying only 6 mm (0.3 in), the lowest of the year. The contrast is stark when compared to earlier months like January and February, where precipitation often exceeds 100 mm and rainy days abound. As summer wanes, the landscape remains relatively dry, setting the stage for the gradual increase in rain during the fall months. Despite the minimal August rainfall, the region’s water needs are sustained by the earlier winter and spring moisture, showcasing the resilient balance of Sisters' seasonal climate.
August marks a significant shift in humidity levels in Sisters, United States, with a notable drop to 62%. This reduction is part of a broader trend observed throughout the summer months, where humidity decreases from a high of 86% in January to 78% in July. Following August, the humidity continues to decline, reaching a low of 59% in September. This gradual decrease contrasts sharply with the higher moisture levels experienced in the winter months, particularly November and December, when humidity peaks at 88%. Overall, the manipulation of hydration levels in Sisters paints a portrait of seasonal transition, offering a refreshing end to summer as the region prepares for the approaching fall.
In August, Sisters, Oregon experiences a UV Index of 9, categorizing it as very high exposure, with a burn time of just 15 minutes. This trend of increasing UV levels peaks in spring and summer, with May reaching an extreme high of 11, followed closely by the summer months, where the index hovers around 10. The strong UV radiation persists into September but begins to taper off in the fall. As you enjoy the vibrant summer days in Sisters, it's essential to stay sun-savvy and protected—especially during these peak UV periods. For detailed information on daily UV levels, you can visit Sisters UV Index.
UV Risk Categories
In August, Sisters, United States, basks in an impressive 367 hours of sunshine, continuing the summer’s glorious trend of abundant sunlight. Following July's peak of 409 hours, August retains a remarkable brightness, albeit with a slight dip, hinting at the transition towards autumn. The month stands as a key highlight in the region's sun-drenched narrative, nestled between the blooming abundance of June and July and the cooler, mellow days of September. This consistent shine throughout the summer not only enhances the natural beauty of the surroundings but also encourages an array of outdoor activities, making August a quintessential time to relish the great outdoors before the days begin to shorten.
In Sisters, United States, the likelihood of sunny weather sees a notable upward trend as summer approaches, peaking in July with 83% sunshine probability. By August, residents can still enjoy a whopping 75% chance of clear skies, making it one of the sunniest months of the year. This trend of increasing sunshine continues through the spring, with April and May showing significant climbs, from 59% to 49% respectively. September maintains a respectable 71%, hinting at the continuation of favorable weather as summer winds down. Overall, the data paints a vibrant picture of August as a delightful opportunity for outdoor activities beneath the sun.
In August, Sisters, United States, enjoys approximately 13 hours of daylight, marking a gentle decline from the peak summer months of June and July, which bask in 15 hours of sunlight each day. This transition signals the gradual shift towards autumn, as the daylight hours begin to shorten, leading to a cozy evolution in the landscape. Following the vibrant blooms of spring and the warm, bright days of summer, August stands as a blend of lingering warmth and the anticipation of cooler evenings ahead. As the days begin to lengthen again in September, this month serves as a beautiful reminder of nature's rhythmic cycles and the shifting seasons.
In Sisters, United States, the August winds whisper their way through the landscape at an average speed of 2.3 m/s (5 mph), continuing a gentle trend seen throughout the summer months. As temperatures rise, the wind slightly eases from the peak of 2.2 m/s (5 mph) in July, signifying the calm after the hustle of summer activities. This subdued breeze remains consistent with the lower wind speeds observed from June through September, a natural lull before autumn revitalizes the air. Interestingly, the light winds of August echo those of January, creating a serene balance across the seasons. Overall, this subtle rhythm of wind speeds reflects the region's tranquil summer atmosphere as it transitions towards the fall.
The weather in Sisters changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Sisters and find detailed weather information for every month.
August and January present starkly contrasting weather conditions. In August, temperatures range from a refreshing 20°C (68°F) on average, peaking at a scorching 37°C (100°F), accompanied by low precipitation of just 8 mm (0.3 in) over 2 days, and a moderate humidity level of 62%. In contrast, January brings freezing temperatures, with an average of 0°C (33°F), dipping as low as -24°C (-11°F) and only reaching a maximum of 14°C (57°F). This month is characterized by significantly higher precipitation at 93 mm (3.7 in) spread over 13 days and a much higher humidity at 86%. For a detailed view on weather trends in January, check this link: Sisters weather in January.
Comparing August and February weather reveals a stark contrast in temperature and conditions. August boasts a warm average temperature of 20°C (68°F), with highs reaching up to 37°C (100°F) and only 2 days of light precipitation, making it a relatively dry month with a humidity level of 62%. In contrast, February experiences much colder temperatures, averaging around 0°C (33°F), with lows plummeting to -22°C (-7°F) and highs only reaching 17°C (62°F). Additionally, February is significantly wetter, with 109 mm (4.3 in) of precipitation spread over 15 days, and a higher humidity level of 87%. For more detailed insights, check out Sisters weather in February.
When comparing the weather in August and March, a stark contrast emerges. August boasts a wide temperature range, with minimums around 0°C (33°F), averaging 20°C (68°F), and peaking at a scorching 37°C (100°F), accompanied by low precipitation of only 8 mm (0.3 in) over just 2 days, leading to a relatively comfortable humidity of 62%. In contrast, March experiences much colder conditions, where temperatures dip to a minimum of -15°C (5°F), average around 3°C (38°F), and reach a maximum of 19°C (67°F). During this month, the region sees significantly more precipitation at 66 mm (2.6 in) spread over 13 days, coupled with higher humidity levels at 86%. For further insights on the weather specifics, check out Sisters weather in March.
August typically boasts much warmer temperatures compared to April, with an average high of 20°C (68°F) and a maximum reaching up to 37°C (100°F). In contrast, April experiences cooler conditions, with an average of only 7°C (45°F) and a maximum of 28°C (83°F). Additionally, August is relatively dry, receiving only 8 mm (0.3 in) of precipitation over two days, while April is quite rainy, accumulating 67 mm (2.6 in) across 11 days. The humidity is also notably higher in April at 85%, compared to 62% in August. For more insights, check out Sisters weather in April.
When comparing the weather in August and May, a stark contrast emerges. August features a wide temperature range, with minimums reaching 0°C (33°F) and maximums soaring up to 37°C (100°F), along with a relatively low precipitation of only 8 mm (0.3 in) spread over just 2 days. In contrast, May experiences cooler temperatures, with minimums dipping as low as -5°C (23°F) and average temperatures around 12°C (53°F). Additionally, May is characterized by significantly higher precipitation levels at 37 mm (1.5 in) over 8 days, contributing to a much more humid atmosphere at 80%, compared to August’s 62%. For more details on May weather, you can visit Sisters weather in May.
August weather is typically warmer than June, with average temperatures reaching 20°C (68°F) compared to June's 16°C (61°F). However, while August enjoys drier conditions with only 8 mm (0.3 in) of rainfall over 2 days, June experiences more precipitation, accumulating 22 mm (0.9 in) over 6 days. Moreover, June tends to be more humid, with an average humidity of 82%, while August's humidity is comparatively lower at 62%. For a more detailed look at the weather patterns in June, you can visit Sisters weather in June.
In comparing the weather of July and August, both months experienced similar temperature ranges, with minimums at 0°C (33°F), average temperatures around 20°C (68°F), and maximums peaking at 37°C (100°F) for August and 37°C (99°F) for July. However, August had slightly more precipitation with 8 mm (0.3 in) over 2 days, while July recorded 6 mm (0.3 in) over just 1 day. Additionally, humidity levels were higher in July at 78%, compared to 62% in August, suggesting that July felt more humid and might have been less comfortable. For more details on July weather, visit Sisters weather in July.
In August, temperatures range from a minimum of 0°C (33°F) to a maximum of 37°C (100°F), with an average temperature of 20°C (68°F). The month sees limited rainfall, registering only 8 mm (0.3 in) over just 2 days, while humidity averages around 62%. In contrast, September brings a significant drop in average temperature to 15°C (59°F), with similar maximum temperatures reaching up to 37°C (99°F). The month is wetter, accumulating 36 mm (1.4 in) of precipitation over 5 days and maintaining a slightly lower humidity of 59%. For more detailed insights, you can view Sisters weather in September.
August and October showcase contrasting weather patterns. In August, temperatures range from a mild 20°C (68°F) on average, with highs hitting 37°C (100°F), creating warm and sunny conditions, accompanied by minimal precipitation of just 8 mm (0.3 in) over 2 days and a humidity of 62%. In stark contrast, October brings cooler temperatures, with averages dropping to 8°C (47°F) and a significant reduction in maximum temperatures to 30°C (87°F). This month also sees a considerable increase in precipitation, totaling 43 mm (1.7 in) over 7 days and higher humidity at 78%. For more detailed information on the weather during this month, check out Sisters weather in October.
August and November showcase stark contrasts in weather patterns. In August, temperatures range from a pleasant 20°C (68°F) on average to highs reaching 37°C (100°F), with minimal precipitation of only 8 mm (0.3 in) over just 2 days, accompanied by a moderate humidity level of 62%. In contrast, November brings much colder temperatures, with averages dropping to around 3°C (38°F) and minimums plummeting to -18°C (0°F). This month also experiences significantly more precipitation, totaling 74 mm (2.9 in) across 11 days, and higher humidity levels at 88%. For more details on November weather specifics, visit Sisters weather in November.
August and December present a stark contrast in weather conditions. In August, temperatures range from a pleasant minimum of 0°C (33°F) to a hot maximum of 37°C (100°F), with an average of 20°C (68°F). The month sees minimal precipitation, averaging only 8 mm (0.3 in) and typically experiencing rain on just 2 days, resulting in relatively moderate humidity at 62%. In contrast, December brings chilly temperatures with a minimum of -19°C (-2°F) and an average temperature of 0°C (33°F), peaking at 18°C (65°F). This month is significantly wetter, with precipitation accumulating to 93 mm (3.7 in) over 14 days and higher humidity levels at 88%. For more detailed insights into the weather in December, you can refer to Sisters weather in December.
In August, the weather in Sisters presents a compelling contrast to the milder temperatures of preceding months. With warm days that can reach a sweltering 37°C (100°F), this month is ideal for outdoor enthusiasts seeking adventure under the summer sun. However, the evenings bring a welcome respite, cooling down to an average of 20°C (68°F). Unlike the wetter months, August experiences only a few brief rainfall events, accumulating just 8 mm over about two days, keeping the humidity at a moderate 62%. For those planning a visit, it’s a vibrant time to explore the natural beauty of Sisters while enjoying the abundant sunshine. To learn more about the seasonal weather patterns, check out Sisters Climate.