Last updated: February 24, 2025
In Walla Walla, United States, August brings a captivating blend of warmth and occasional refreshment. The maximum temperature reaches a scorching 39°C (102°F), while the average temperature settles at a comfortable 22°C (72°F). Despite the heat, the month showcases a minimum of 6°C (42°F), providing a refreshing cool down at night. Residents can expect minimal rainfall, with total precipitation amounting to only 8 mm (0.3 in) across just one day, contributing to a humidity level of around 60%. This delightful summer month offers a perfect opportunity for outdoor activities under the radiant sun.
In August, Walla Walla basks in the peak of summer warmth, with temperatures showcasing a delightful range. The minimum temperature hovers around 6°C (42°F), providing cool evenings, while the average soars to a pleasant 22°C (72°F). With maximum highs reaching up to 39°C (102°F), it's a time when the sun shines brightly, inviting residents and visitors alike to enjoy outdoor activities. Compared to the cooler months, August stands out as the warmest month in Walla Walla's climate, marking a significant shift from the frigid lows of earlier winter months. This blend of warmth and cooler nights creates a perfect atmosphere for late-summer celebrations, making it a favored time to relish the beauty of the region.
In August, Walla Walla experiences a notable shift in its precipitation patterns. With just 8 mm (0.3 in) of rain over a mere 1 day, the month stands out as one of the driest in the year, following a remarkably parched July that recorded barely any rainfall. This minimal rainfall marks a continuation of the dry trend established in the summer months, culminating in a sharp contrast to the wetter seasons earlier in the year, such as February, which boasted 125 mm (4.9 in) across 18 days. As the region moves towards autumn, it can be observed that while brief rainfall events become less frequent, Walla Walla’s overall precipitation begins to rebound with September's average of 25 mm (1.0 in), hinting at the return of more substantial rain in the months to come.
August in Walla Walla marks a noticeable shift in humidity, with levels dropping to 60%, the lowest point of the year. This decline follows a gradual trend starting from June and July, where humidity levels hovered around 76% and 81% respectively. The transition into the late summer months reveals a refreshing decrease, offering a welcome reprieve from the higher humidity seen in earlier months like January and February, both at a robust 86%. As the summer heat peaks, Walla Walla's August air becomes increasingly comfortable, paving the way for the drier conditions typical of September, which further dips to 58%. This pattern illustrates the region's characteristic shift toward a much drier climate as it moves into fall.
In August, Walla Walla experiences a UV Index of 9, indicating a very high exposure risk, with a burn time of just 15 minutes for unprotected skin. This trend of elevated UV levels continues from the peak months of June and July, which also recorded a UV Index of 10. These summer months demonstrate a pattern of increasing sun intensity, leading up to August, before a gradual decrease in September with a drop to a UV Index of 7. It's crucial for residents and visitors to take precautions during this period to protect their skin from harmful UV rays. For more detailed insights, check out Walla Walla UV Index.
UV Risk Categories
August in Walla Walla, United States, continues the summer's radiant display with 356 hours of sunshine, making it one of the sunniest months of the year. This is a slight decline from the peak sunshine of July, which boasted an impressive 411 hours. However, August still radiates warmth as the region transitions into early autumn, contributing to a total of over 2,000 hours of sunlight from June to August alone. As summer wanes, September marks a notable decrease to 292 hours, highlighting the gradual shift in seasons. Overall, the trend showcases the abundant sunshine Walla Walla enjoys in its peak summer months, with August serving as a vibrant bridge to the cooler days ahead.
In Walla Walla, August boasts a 70% chance of sunny weather, making it one of the sunniest months of the year. This is a slight dip from the peak of 83% in July, indicating that while summer lingers, there's a gradual transition towards the fall months. The trend throughout the summer is clear: as we move from the wetter winter months—where sunshine is a rare delight, with only 23% in January—into the brighter, drier days of June and July, Walla Walla basks in increasing likelihoods of sunshine. As August approaches, residents can still look forward to warm, sunny days, ideal for outdoor activities before the sun's chances begin to wane in September.
In August, Walla Walla experiences a delightful return to 14 hours of daylight, a perfect blend of summer warmth and evening relaxation. This daylight duration marks a slight decrease from the peak of 15 hours enjoyed in July, highlighting a subtle transition as summer edges toward fall. The trend of longer days begins in March, peaking during the heart of summer in June and July, before gently tapering off in the late summer and early autumn months. As the days grow shorter, September heralds a drop to 12 hours, reminding us of the approaching seasonal change. This ebb and flow of daylight not only influences daily activities but also enhances the charm of Walla Walla's vibrant summer landscape.
In August, Walla Walla experiences a gentle breeze with an average wind speed of 2.7 m/s (6 mph), contributing to the region's warm summer atmosphere. The wind speeds during this month are notably lower than the winter months, where January and February see averages of 3.0 m/s (7 mph) and 3.4 m/s (8 mph), respectively. As the summer unfolds, wind speeds gradually decline from 3.4 m/s in February to 2.5 m/s in July, before stabilizing slightly in August. The transition into fall signals a further drop, with September reaching its lowest average of 2.4 m/s (5 mph). This pattern illustrates a distinct seasonal rhythm, where winds tend to be more prominent in the colder months, while the summer months bring a more tranquil breeze, perfect for outdoor activities in Walla Walla.
The weather in Walla Walla 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 Walla Walla and find detailed weather information for every month.
In August, temperatures in Walla Walla can soar, with highs reaching up to 39°C (102°F) and an average of 22°C (72°F), while humidity remains at a moderate 60%. Precipitation is minimal, with only about 8 mm (0.3 in) expected over just one day. In stark contrast, January brings much colder conditions, featuring lows of -19°C (-1°F) and an average temperature of just 1°C (34°F). This winter month sees significantly more precipitation, totaling 77 mm (3.0 in) over 13 days, along with higher humidity at 86%. For a detailed look at what to expect, check out Walla Walla weather in January.
August and February present starkly contrasting weather conditions. August boasts an average temperature of 22°C (72°F), with highs reaching up to 39°C (102°F) and minimal precipitation of just 8 mm, making it a warm and relatively dry month with a humidity level of 60%. In sharp contrast, February often feels frigid, with an average temperature of just 1°C (34°F) and minimums dropping to a biting -17°C (2°F). This winter month experiences significantly higher precipitation, totaling 125 mm over 18 days, along with a higher humidity of 86%. For more detailed insights, you can explore Walla Walla weather in February.
The weather in August is typically much warmer and drier compared to March. In August, temperatures can range from a cool 6°C (42°F) at night to a sweltering max of 39°C (102°F) during the day, with an average of 22°C (72°F). Precipitation is minimal, averaging just 8 mm (0.3 in) over a single day, and the humidity sits at a comfortable 60%. In contrast, March experiences much cooler temperatures, with nighttime lows dropping to -12°C (11°F) and daytime highs reaching only 18°C (65°F), averaging around 5°C (41°F). March is also significantly wetter, with total precipitation reaching 75 mm (3.0 in) over 13 days and higher humidity at 85%. For more specific details, check out Walla Walla weather in March.
When comparing the weather in August and April, a stark contrast emerges. August boasts much warmer temperatures, with a minimum of 6°C (42°F) and an average of 22°C (72°F), while reaching a scorching maximum of 39°C (102°F). Precipitation is minimal during this month, averaging just 8 mm (0.3 in) over only 1 day, and the humidity is reasonably manageable at around 60%. In contrast, April experiences cooler conditions, with temperatures ranging from a minimum of -7°C (20°F) to a maximum of 27°C (80°F) and an average of only 9°C (48°F). This month is significantly wetter, receiving an average of 62 mm (2.4 in) of precipitation over 11 days, coupled with higher humidity levels at 83%. For a deeper look at April's weather, check out Walla Walla weather in April.
In August, the weather typically features a broader temperature range, with minimums around 6°C (42°F) and maximums reaching as high as 39°C (102°F), resulting in an average temperature of 22°C (72°F). In contrast, May experiences cooler temperatures, ranging from a minimum of -1°C (30°F) to a maximum of 32°C (90°F), leading to an average of 14°C (57°F). Precipitation levels also differ significantly, with August receiving only 8 mm (0.3 in) across one day, while May endures 48 mm (1.9 in) over approximately nine days. Additionally, humidity is higher in May at 77%, compared to August's 60%. For more details, you can check Walla Walla weather in May.
When comparing the weather in August and June, several key differences emerge. August generally sees a higher average temperature of 22°C (72°F) compared to June's 18°C (65°F), with maximum temperatures peaking at 39°C (102°F) in August, while June can reach up to 43°C (110°F). In terms of precipitation, August is much drier, receiving only 8 mm (0.3 in) over just 1 day, in contrast to June's 27 mm (1.1 in) spread over 6 days. Furthermore, humidity levels tend to be lower in August at 60%, compared to June's 81%. For more details, you can check out Walla Walla weather in June.
In comparing the weather of July and August, we see slight variations in temperature and humidity. July tends to be marginally warmer, with an average temperature of 23°C (74°F) and a maximum temperature peaking at 39°C (103°F). In contrast, August has a slightly lower average temperature of 22°C (72°F) but can also reach a maximum of 39°C (102°F). Humidity is notably higher in July at 76%, compared to August's 60%. Additionally, July experiences no recorded precipitation days, while August sees a minimal amount of precipitation over just one day, measuring 8 mm (0.3 in). For more details on July's weather, you can visit Walla Walla weather in July.
In comparing the weather of August and September, there are notable differences in temperature and precipitation. August tends to be warmer, with average temperatures around 22°C (72°F) and maximums reaching up to 39°C (102°F), alongside relatively low precipitation of just 8 mm (0.3 in) over only 1 day. In contrast, September sees a drop in average temperature to 17°C (62°F) and a minimum of 1°C (35°F), making it significantly cooler. Additionally, September experiences increased rainfall, with 25 mm (1.0 in) of precipitation occurring over 4 days, though humidity remains relatively consistent at 58%. For more details about September weather, you can check Walla Walla weather in September.
August and October present striking contrasts in weather patterns. In August, temperatures soar with a minimum of 6°C (42°F) and an average of 22°C (72°F), peaking at a scorching 39°C (102°F). Rainfall is minimal, with just 8 mm (0.3 in) over the course of one day, and humidity hovers around 60%. In contrast, October brings a cooler climate with temperatures ranging from a brisk -11°C (13°F) to an average of 9°C (49°F) and a maximum of 28°C (83°F). Precipitation significantly increases to 62 mm (2.4 in) across ten days, and humidity also rises to 75%. For more details on the October weather specifics, you can check out Walla Walla weather in October.
August and November present stark contrasts in weather characteristics. In August, temperatures range from a mild 6°C (42°F) to a scorching 39°C (102°F), with an average of 22°C (72°F), alongside minimal precipitation of only 8 mm (0.3 in) over just one day. The humidity sits comfortably at 60%, creating a warm and dry atmosphere. In contrast, November experiences much colder temperatures, ranging from a frigid -9°C (17°F) to a mild 20°C (68°F), with an average temperature of just 5°C (41°F). This month also sees significantly higher precipitation, totaling 84 mm (3.3 in) across 13 days, and an increased humidity level of 85%, contributing to a damp and chillier climate. For a detailed view, check out Walla Walla weather in November.
August and December present starkly contrasting weather conditions. In August, temperatures can soar as high as 39°C (102°F), with an average of 22°C (72°F) and minimal precipitation of just 8 mm, leading to a relatively dry month with only one day of rain and a humidity level of 60%. In contrast, December brings much colder temperatures, with a minimum of -14°C (6°F) and an average of just 1°C (34°F). The month is notably wetter, receiving 93 mm of precipitation spread over 15 days, and higher humidity at 87%. For a detailed look at December conditions, check out Walla Walla weather in December.
August in Walla Walla brings a striking contrast to the cooler months, showcasing warm days and slightly cooler nights. With temperatures soaring to a maximum of 39°C (102°F), the month stands out as one of the hottest of the year, while average temperatures linger around a comfortable 22°C (72°F). The minimal precipitation and moderate humidity further enhance the summer vibe, making it a perfect time for outdoor activities and exploring the region's stunning landscapes. For more insights into how August fits into the overall climate pattern, be sure to check out Walla Walla Climate.