Last updated: February 24, 2025
August in Ketchikan presents a fascinating blend of weather contrasts, characterized by a maximum temperature reaching 22°C (72°F) and an average of 14°C (58°F), providing a mild summer experience. However, visitors should prepare for the region's renowned moisture, as the month sees 302 mm (11.9 in) of rainfall spread over 17 days. With humidity levels soaring at an impressive 92%, Ketchikan’s weather not only invites exploration of its lush landscapes but also highlights the charm of a coastal town where vibrant greenery thrives under the abundant rainfall.
In August, Ketchikan experiences mild and pleasant temperatures ideal for outdoor adventures, with minimums sitting comfortably at 10°C (50°F) and an average of 14°C (58°F), peaking at about 22°C (72°F). This month marks a continuation of the gradual warming trend that begins in late spring, contrasting sharply with the frigid January temperatures that drop to a chilling -10°C (15°F). As summer reaches its zenith, the warmth invites locals and visitors alike to enjoy the stunning natural beauty that Ketchikan has to offer, making it one of the most favorable times to explore this coastal gem.
In August, Ketchikan experiences a notable surge in precipitation, receiving 302 mm (11.9 in) of rainfall over 17 days. This amount is slightly lower than the monthly totals for October and November, but it keeps pace with the wet conditions typical for this coastal community. The late summer months consistently showcase heavy rainfall, with August almost mirroring September’s precipitation levels, suggesting a continuation of moisture-laden weather as the region transitions toward fall. The pattern of increased precipitation is striking, as it reflects Ketchikan's reputation as one of the rainiest cities in the United States, with a noteworthy average of 16 rainy days per month from October through November. As summer ends, the frequency and intensity of rain begin to rise, setting the stage for the wetter months ahead.
August in Ketchikan brings a noticeable surge in humidity, peaking at 92%. This increase continues the trend set in July, which itself experiences a significant uptick with 90% humidity. As summer transitions to fall, August acts as a bridge, maintaining high moisture levels that are characteristic of the season. Interestingly, the humidity in Ketchikan remains relatively consistent throughout the year, hovering around the mid-80s during the spring months and slightly higher in the late summer and early fall. While winter months, particularly January and February, show only a slight dip, the overall ambiance of Ketchikan is shaped by this persistent humidity, reflecting its lush, coastal rainforest climate.
In August, Ketchikan experiences a high UV Index of 7, maintaining the summer trend from July while offering slightly more breathing room than the peak month. With a burn time of 25 minutes, it’s essential to plan your outdoor activities wisely to protect your skin amid the lush Alaskan backdrop. As the season transitions into fall, UV levels begin to taper off, dropping to a moderate level by September. It’s fascinating to observe how the UV Index fluctuates throughout the year, providing vital insights for sun safety as well as opportunities to enjoy the great outdoors. For more detailed information, check out the Ketchikan UV Index.
UV Risk Categories
In Ketchikan, August embraces a delightful balance of sunlight, offering 224 hours of radiant rays as summer begins its gentle fade into autumn. This month sees a slight dip from July's peak of 248 hours, signaling a transition while still providing ample opportunities for outdoor adventures under the warm sun. The trend from spring into summer showcases a gradual increase in daylight, peaking in the heart of summer, before slowly receding into the shorter days of September and October. Despite this decline, August remains a vibrant month filled with bright skies, inviting both locals and visitors to savor the lingering warmth and golden hues of summer.
In Ketchikan, the United States, the likelihood of sunny weather in August shows a slight uplift with a 31% chance of sunshine, marking a modest improvement compared to the earlier summer months of June and July, which both hover around 27%. As the summer progresses, we can observe a gradual rise in sunny probabilities, especially when juxtaposed against the cloudier winter months, where chances dip significantly, ranging from 10% in September to just 20% in January. The peak promise of sunshine is found in April at 41%, but August still offers a glimmer of hope for those seeking a bright summer day. Overall, while Ketchikan may not boast an abundance of sunny days in August, it's one of the brighter months, providing a pleasant respite from the region's typically overcast climate.
As summer draws to a close, August in Ketchikan offers a gentle transition with 14 hours of daylight. This marks a slight decrease from the sun-drenched heights of June, which boasted an impressive 17 hours. The gradual tapering of daylight throughout the month reflects a broader trend of lengthening nights as the year progresses. Following the extended brightness of May and June, Ketchikan residents can savor these remaining weeks of long days before the daylight dips further to 12 hours in September. This rhythmic ebb and flow of daylight not only shapes daily activities but also enhances the region's stunning natural beauty, inviting both locals and visitors to relish the lingering summer moments.
In August, Ketchikan experiences a subtle yet notable breeze, with an average wind speed of 4.6 m/s (10 mph). This marks a slight uptick from the calmer July, where winds dipped to 3.7 m/s (8 mph), as summer transitions toward the vibrant colors of autumn. While August doesn't reach the gustier levels of the winter months, which can soar up to 8.0 m/s (18 mph) in January, it's a pleasant reminder of nature's rhythm. As the year progresses into September, winds tend to pick up again to 6.1 m/s (14 mph), indicating a shift in the seasonal patterns. Overall, August's gentle winds create a soothing atmosphere, making it an ideal time to enjoy Ketchikan's stunning outdoor scenery.
The weather in Ketchikan 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 Ketchikan and find detailed weather information for every month.
When comparing the weather in August and January, stark contrasts emerge. August tends to be milder, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 22°C (72°F) and an average of 14°C (58°F). While it experiences significant rainfall, totaling 302 mm (11.9 in) over 17 days, the high humidity at 92% adds to a sense of warmth. In contrast, January ushers in a much colder climate, where temperatures can plummet to a minimum of -10°C (15°F) and only reach a maximum of 8°C (47°F), averaging around 3°C (37°F). The precipitation remains similar, with 306 mm (12.1 in) over 18 days, but the lower humidity at 86% makes the cold feel even more biting. For more detailed insights into the winter climate, check out Ketchikan weather in January.
The weather in August and February presents a stark contrast. August typically experiences milder temperatures, with a minimum of 10°C (50°F) and an average of 14°C (58°F), peaking at a comfortable 22°C (72°F). In addition, it sees significant rainfall, averaging 302 mm (11.9 in) over 17 days, which contributes to a high humidity level of 92%. In contrast, February is markedly colder, with temperatures dropping to a minimum of -10°C (15°F) and only reaching a maximum of 8°C (47°F). While it has less precipitation than August, totaling 168 mm (6.6 in) over 14 days, the humidity is still notable at 85%. For those considering a visit during this winter month, more detailed insights can be found in Ketchikan weather in February.
August and March in Ketchikan present stark contrasts in weather. August typically enjoys milder temperatures, ranging from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), with an average of 14°C (58°F). In contrast, March sees much cooler conditions, with temperatures ranging from a chilling -4°C (25°F) to a moderate 14°C (57°F) and an average of just 4°C (39°F). Precipitation levels are notable in both months, but August stands out with 302 mm (11.9 in) over 17 days, compared to March’s 221 mm (8.7 in) over 19 days. Humidity is also higher in August at 92%, whereas March maintains a slightly lower humidity level of 84%. For more details on March's weather patterns, check out Ketchikan weather in March.
When comparing the weather in August and April, August tends to be significantly warmer and wetter. In August, temperatures range from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), with an average temperature of 14°C (58°F), while April's temperatures are cooler, with a minimum of 0°C (32°F) and a maximum of 14°C (57°F), averaging only 6°C (43°F). Additionally, August experiences higher precipitation levels, with 302 mm (11.9 in) falling over 17 days, compared to April's 218 mm (8.6 in) over 16 days. Humidity is also greater in August at 92%, compared to April's 85%. For a detailed look at the conditions typically experienced in April, you can visit Ketchikan weather in April.
In comparing the weather between May and August, it’s clear that August is generally warmer and wetter. In August, temperatures range from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), with an average of 14°C (58°F). In contrast, May has cooler temperatures, with a minimum of 4°C (40°F) and a maximum of 18°C (65°F), averaging at 9°C (48°F). Additionally, August experiences significantly more precipitation, totaling 302 mm (11.9 in) over 17 days, compared to May's 141 mm (5.6 in) over 15 days. The humidity level is also higher in August at 92%, compared to 81% in May. For more details on the weather in May, you can check Ketchikan weather in May.
In comparing the weather of August and June, both months exhibit a maximum temperature peaking at 22°C (72°F), but August generally experiences warmer average and minimum temperatures, with averages reaching 14°C (58°F) and a minimum of 10°C (50°F) compared to June’s averages of 11°C (53°F) and a minimum of 7°C (44°F). Additionally, August sees significantly more precipitation, with 302 mm (11.9 in) over 17 rainy days, while June receives 216 mm (8.5 in) of rain across 18 days, indicating a wetter end to the summer season. This difference in humidity also highlights August's higher levels at 92%, compared to June's 81%. For a more detailed overview, explore the Ketchikan weather in June.
In comparing the weather of August and July, we observe that both months exhibit similar temperature ranges, with minimums around 10°C (50°F) and averages close to 14°C (57-58°F). However, August is characterized by significantly higher precipitation, totaling 302 mm (11.9 in) over 17 days compared to July's 162 mm (6.4 in) across 14 days. This increase in rainfall contributes to a slight rise in humidity levels as well, with August reaching 92% versus July's 90%. For a more detailed look at July's weather, you can visit Ketchikan weather in July.
August and September in Ketchikan exhibit similar weather patterns, with both months characterized by a high precipitation level of 302 mm (11.9 in) and 17 rainy days. However, August tends to be slightly warmer, with average temperatures ranging from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), while September's temperatures decrease, averaging a minimum of 8°C (46°F) and a maximum of 19°C (67°F). The humidity remains consistent at 92% in both months, contributing to a damp and cool atmosphere. For more detailed information, check out Ketchikan weather in September.
In August, Ketchikan experiences relatively mild temperatures, with average highs reaching 22°C (72°F) and lows around 10°C (50°F). However, the month is marked by significant rainfall, totaling 302 mm (11.9 in) over 17 days, and humidity levels remain high at 92%. In contrast, October sees a noticeable drop in temperatures, with averages around 8°C (47°F) and maximums peaking at 14°C (57°F). Precipitation increases slightly to 331 mm (13.0 in) over 20 days, while humidity remains comparable at 91%. For a more detailed look at the weather during this month, check out Ketchikan weather in October.
August and November in Ketchikan showcase a notable contrast in weather patterns. In August, the temperatures are relatively mild, with a minimum of 10°C (50°F) and a maximum of 22°C (72°F), while the average hovers around 14°C (58°F). However, this month is characterized by heavy rainfall, totaling 302 mm (11.9 in) over 17 days, contributing to a high humidity level of 92%.
In comparison, November experiences a significant drop in temperature, with averages around 6°C (43°F) and a maximum of only 11°C (51°F), alongside a chilly minimum of 0°C (32°F). Precipitation increases to 410 mm (16.1 in) spread over 23 days, resulting in slightly lower humidity at 87%. For more detailed information on November weather, you can visit Ketchikan weather in November.
August and December in Ketchikan showcase stark contrasts in weather. August typically offers milder temperatures, with averages around 14°C (58°F) and maximums reaching 22°C (72°F), while December plunges to an average of just 3°C (38°F) and highs of 9°C (49°F). Precipitation levels are high in both months, with August receiving 302 mm (11.9 in) over 17 days and December slightly wetter at 345 mm (13.6 in) over 21 days. Additionally, the humidity remains high in both months, though August is slightly more humid at 92% compared to December’s 87%. For a deeper look into December's climate, check out Ketchikan weather in December.
In August, Ketchikan experiences a unique blend of mild warmth and considerable moisture, setting it apart from the summer months preceding it. With average temperatures hovering around a comfortable 14°C (58°F), days can peak at 22°C (72°F), providing an inviting atmosphere for outdoor activities. However, this month is also marked by its highest levels of precipitation, with around 302 mm (11.9 in) falling over 17 days. The 92% humidity adds to the tropical feel, making this time of year lush and vibrant. As summer transitions to fall, August serves as a reminder of Ketchikan's coastal climate, making it a fascinating time to explore. For more insights into the weather patterns throughout the year, visit Ketchikan Climate.