Last updated: February 24, 2025
May in Walla Walla, United States, is characterized by a dynamic range of temperatures, with maximums reaching 32°C (90°F) and minimums dropping to -1°C (30°F). The month averages a comfortable 14°C (57°F), making it an ideal time for outdoor activities. While the region typically enjoys mild weather, precipitation amounts to 48 mm (1.9 in) over 9 days, contributing to a humidity level of 77%. This blend of warmth and occasional rain creates a vibrant and lush environment, perfect for exploring the local landscapes.
As May arrives in Walla Walla, the temperatures reflect a notable shift towards warmth, marking a transition from the lingering chill of winter. With minimums around -1°C (30°F), an average of 14°C (57°F), and highs soaring to a delightful 32°C (90°F), the month paints a picture of blossoming spring. This upward trend in temperature is a welcome contrast to the colder months, where January averaged only 1°C (34°F). May’s weather invites outdoor activities as the region begins to embrace the sunnier, more temperate days ahead, setting the stage for the even warmer months of June and July. Overall, the progression from the colder temperatures of earlier months to May's inviting climate perfectly encapsulates the beauty of seasonal change in Walla Walla.
In May, Walla Walla experiences a noticeable dip in precipitation, with just 48 mm (1.9 in) of rain falling over nine days. This decline follows the wet spring months of January through April, which collectively receive much higher rainfall. As the city transitions into summer, precipitation becomes scarcer, hinting at the drier months ahead; June typically brings only 27 mm (1.1 in) over six days. The overall trend shows a marked reduction in rainfall, suggesting that May serves as a pivotal bridge towards the warmer and more arid summer season, where residents can expect less frequent rain and sunnier days.
In May, Walla Walla begins to shake off the heavy, cool air of winter, with humidity dropping to 77%—a significant decrease compared to the wetter months of January through April. This trend of decreasing humidity continues into the summer, setting the stage for the warmer and drier conditions typical of the season. As the temperatures rise, residents can enjoy the outdoors without the lingering dampness that characterized the earlier months. Interestingly, while the humidity dips, it remains relatively high compared to the subsequent months, signaling a comfortable transition into late spring. The gradual shift towards lower humidity levels not only enhances the appeal of this picturesque region but also paves the way for the warmer, more arid months ahead.
As May unfolds in Walla Walla, the sun starts to make its presence felt with a very high UV Index of 9, significantly ramping up from the previous months. This increase signals a shift in exposure risk, halving the burn time to just 15 minutes for fair-skinned individuals—reflecting a trend where the UV Index escalates rapidly into the summer months. Following April’s high levels, May’s intensity paves the way for an even more scorching June and July, both peaking at an Index of 10. As outdoor activities increase, this month serves as a crucial reminder for residents and visitors alike to stay vigilant about sun safety. For more detailed insights, visit Walla Walla UV Index.
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In Walla Walla, the arrival of May ushers in a radiant transformation, as the region basks in an impressive 342 hours of sunshine. This marks a significant upward trend from the 285 hours recorded in April, continuing the momentum built through the earlier months, where sunshine hours steadily increased from 111 in January to 241 in March. As spring unfolds, Walla Walla's brilliant skies invite residents and visitors alike to enjoy the vibrant landscape, signaling the approach of summer, which boasts an even sunnier 366 hours in June. With each passing month, the blooming warmth not only enhances outdoor activities but also brightens spirits, establishing May as a pivotal point in the yearly cycle of light in this charming town.
As May rolls into Walla Walla, the promise of sunny weather becomes increasingly tangible, with a 53% chance of sunshine gracing the days. This marks a slight dip from the sunniest month of April, which boasts a 62% likelihood, yet still positions May favorably in comparison to the earlier months of the year. As the spring blooms, a notable trend emerges; the chances for sunny skies steadily rise as the seasons advance, peaking in the summer months with July reaching an impressive 83%. This organic progression from the 23% chance in January to the vibrant summer highs highlights not only the warming weather but also Walla Walla’s transformation into a sun-kissed haven as the year unfolds.
As spring unfolds into summer in Walla Walla, daylight hours steadily increase, reaching a peak in May with 14 hours of radiant sunshine. This month marks a significant transition, showcasing a climb from 11 hours in March and 13 hours in April. Following this, the sun lingers even longer in June and July, with a remarkable 15 hours of daylight, illuminating the vibrant landscapes. However, as the seasons shift into late summer and autumn, daylight hours gradually wane, returning to 12 hours in September and subsequently dropping to just 8 hours by December. This cyclical pattern of increasing and decreasing daylight not only highlights the beauty of seasonal change but also invites Walla Walla residents to fully embrace the longer, sun-soaked days of spring and summer.
In May, Walla Walla experiences a gentle breeze, with an average wind speed of 2.9 m/s (7 mph), making it a pleasant month for outdoor activities. This trend of mild winds continues from April, which mirrors the same speed, showcasing a calming consistency as spring transitions toward summer. Overall, May marks a notable period where winds remain relatively stable compared to earlier months, fluctuating just slightly from January through April, which saw slightly varied speeds. As summer approaches, the wind speeds tend to ease to 2.7 m/s (6 mph) in June, suggesting that May captures a sweet spot of refreshing yet manageable winds, perfect for enjoying the scenic beauty of 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 May'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.
May generally offers a more temperate experience compared to the cold depths of January. With temperatures ranging from a chilly minimum of -1°C (30°F) to a warm maximum of 32°C (90°F), May averages a pleasant 14°C (57°F) and features significantly lower humidity at 77%. In contrast, January sees much harsher conditions, with temperatures dipping as low as -19°C (-1°F) and averaging just 1°C (34°F), while only reaching a maximum of 12°C (54°F). Additionally, January tends to be wetter, recording 77 mm (3.0 in) of precipitation over 13 days, compared to May’s 48 mm (1.9 in) across 9 days. For a detailed look at January conditions, check out Walla Walla weather in January.
In comparing the weather of May to February, it's clear that May experiences significantly warmer temperatures, with averages soaring to 14°C (57°F) and a maximum of 32°C (90°F), while February sees much colder conditions, peaking at just 16°C (61°F) and averaging only 1°C (34°F). Additionally, February has a higher precipitation rate of 125 mm (4.9 in) across 18 days, compared to May's 48 mm (1.9 in) over just 9 days. Humidity levels are also higher in February at 86%, while May's humidity sits at 77%, contributing to the contrasting sensations of early spring warmth versus the chill of winter. For more details on February's weather specifically, you can refer to Walla Walla weather in February.
In comparing the weather of March and May, it’s clear that May brings significantly warmer temperatures, with an average reaching 14°C (57°F) compared to March's chillier average of 5°C (41°F). While March experiences lower maximum temperatures of 18°C (65°F), May can soar up to 32°C (90°F), showcasing a more summer-like climate. Additionally, March tends to have higher precipitation levels, at 75 mm (3.0 in) over 13 days, compared to May's 48 mm (1.9 in) over 9 days. Humidity levels are also slightly lower in May at 77%, compared to March's 85%. For more insights on March weather, you can check out Walla Walla weather in March.
In comparing the weather between April and May, May presents a noticeable increase in average temperatures, with a minimum of -1°C and an average of 14°C, compared to April's minimum of -7°C and average of 9°C. While both months experience a range of temperatures, May reaches a higher maximum of 32°C, significantly warmer than April's peak of 27°C. Precipitation is somewhat lower in May, with 48 mm over 9 days compared to April’s 62 mm over 11 days, though humidity remains relatively high in both months, at 77% for May and 83% for April. For a detailed look at April's weather patterns, you can refer to Walla Walla weather in April.
May weather presents a notable range in temperatures, with a chilly minimum of -1°C (30°F) and rising to a warm maximum of 32°C (90°F), averaging around 14°C (57°F). It experiences more frequent precipitation, totaling 48 mm (1.9 in) over 9 days, and the humidity level is relatively high at 77%. In contrast, June shows a shift to warmer temperatures, starting at 4°C (39°F) and peaking at an impressive 43°C (110°F), with an average of 18°C (65°F). The month sees less rainfall, accumulating just 27 mm (1.1 in) over 6 days, accompanied by a slightly increased humidity of 81%. For more details on June conditions, check Walla Walla weather in June.
May and July exhibit distinctly different weather patterns. In May, temperatures can range from a brisk minimum of -1°C (30°F) to a warm maximum of 32°C (90°F), with an average of 14°C (57°F). The month experiences about 48 mm (1.9 in) of precipitation over 9 days, leading to a relatively humid environment at 77%. In contrast, July boasts much warmer conditions, with minimum temperatures starting at 7°C (45°F) and soaring to a maximum of 39°C (103°F), averaging 23°C (74°F). Importantly, July is characterized by significantly less precipitation, just 2 mm (0.1 in) with no rainy days, and slightly lower humidity at 76%. For those interested in more detailed weather information, Walla Walla weather in July offers further insights.
May and August exhibit notable differences in weather patterns. In May, temperatures can range dramatically from a chilly -1°C (30°F) at night to a warm 32°C (90°F) during the day, with an average temperature of 14°C (57°F). This month also sees higher humidity levels at 77% and approximately 48 mm (1.9 in) of precipitation over about nine days. In contrast, August is generally warmer, with minimum temperatures starting at 6°C (42°F) and peaking at 39°C (102°F), resulting in a comfortable average of 22°C (72°F). Moreover, August records significantly less precipitation, only 8 mm (0.3 in) over just one day, and a lower humidity level of 60%. For more detailed information about the typical weather in August, you can check this link: Walla Walla weather in August.
In May, the weather showcases a wider temperature range, with minimums dipping to -1°C (30°F) and maximums reaching up to 32°C (90°F). This month experiences an average temperature of 14°C (57°F) and receives about 48 mm (1.9 in) of precipitation over approximately 9 days, accompanied by a high humidity level of 77%. In contrast, September brings slightly milder conditions, with minimum temperatures of 1°C (35°F) and maximums soaring to 36°C (97°F). The average temperature rises to 17°C (62°F), and it sees much less precipitation, totaling 25 mm (1.0 in) over just 4 days, along with a lower humidity of 58%. For more details, refer to Walla Walla weather in September.
May and October present contrasting weather patterns. In May, temperatures range from a low of -1°C (30°F) to a high of 32°C (90°F), with an average temperature of 14°C (57°F) and a notable level of humidity at 77%. The month experiences about 48 mm (1.9 in) of precipitation over approximately nine days. In contrast, October sees lower temperatures, with a minimum of -11°C (13°F), an average of 9°C (49°F), and a maximum of 28°C (83°F). This month has slightly higher precipitation, totaling 62 mm (2.4 in) over ten days, and humidity remains relatively stable at 75%. For more detailed information on October weather in Walla Walla, you can check out Walla Walla weather in October.
May and November exhibit contrasting weather patterns in terms of temperature and precipitation. In May, temperatures range from a chilly min of -1°C (30°F) to a warm max of 32°C (90°F), with an average of 14°C (57°F) and relatively moderate precipitation at 48 mm (1.9 in) over about 9 days. In stark contrast, November experiences colder temperatures, with a minimum of -9°C (17°F) and a maximum of 20°C (68°F), averaging just 5°C (41°F). This month also sees higher precipitation levels, totaling 84 mm (3.3 in) over 13 days, accompanied by increased humidity of 85%. For more details, you can check Walla Walla weather in November.
May and December present strikingly different weather conditions. In May, temperatures range from a chilly -1°C (30°F) at night to a warm 32°C (90°F) during the day, with an average of 14°C (57°F). The month sees relatively low precipitation with 48 mm (1.9 in) over about 9 days and an average humidity of 77%. In contrast, December experiences much colder temperatures, ranging from a minimum of -14°C (6°F) to a maximum of 18°C (65°F), averaging just 1°C (34°F). This month tends to be wetter, with 93 mm (3.7 in) of precipitation spread over approximately 15 days, coupled with higher humidity at 87%. For more detailed information, you can check Walla Walla weather in December.
As May unfolds in Walla Walla, it brings a refreshing transition from the cooler early months of the year. Daytime temperatures can soar to a warm 32°C, offering pleasant days that are perfect for outdoor activities. With an average temperature of 14°C, residents and visitors alike can enjoy a comfortable climate, though they should be prepared for the occasional chill, as nighttime can drop close to freezing. The month sees a moderate amount of rain, totaling around 48 mm, which contributes to lush landscapes, while the humidity levels hover around 77%, adding a touch of moisture to the air. This blend of conditions makes May a unique month in Walla Walla's weather patterns. For a deeper understanding of the region's climate, visit Walla Walla Climate.