Last updated: February 24, 2025
In August, Yountville, United States experiences warm and dry weather, with maximum temperatures soaring up to 43°C (109°F) and an average temperature settling around 24°C (75°F). Even during the cooler nights, temperatures rarely drop below 11°C (52°F), ensuring comfortable evenings. With zero precipitation recorded this month, residents enjoy an abundance of sunshine under a clear sky, complemented by relatively low humidity levels at 36%. This ideal summer climate makes Yountville a perfect destination for outdoor activities and wine country explorations.
In August, Yountville experiences warm and inviting temperatures, making it a prime time for outdoor activities and vineyard explorations. The minimum temperature hovers around 11°C (52°F), while the average peaks at a comfortable 24°C (75°F). As the month progresses, the maximum can soar to a sizzling 43°C (109°F), reflecting the area's trend of gradually rising heat from previous months. This pattern indicates that summer is in full swing, with consistently high temperatures that start early in the season and continue to rise through to late summer, creating ideal conditions for visitors to relish the beauty of this charming destination.
August in Yountville is characterized by a complete absence of precipitation, with 0 mm recorded over the entire month. This dry spell continues a notable trend, as the summer months generally experience significantly reduced rainfall, peaking in July with just 1 mm. As the year progresses into autumn, precipitation levels begin to rise again, with October and November bringing an increased amount of rain. This pattern underscores Yountville's transition from the dry summer season into a wetter, more varied climate as the year unfolds, suggesting a dynamic interplay between seasonal changes and local weather phenomena.
In August, Yountville experiences a significant drop in humidity, reaching a comfortable 36%, a stark contrast to the damp conditions of earlier months. This decline marks the lowest humidity level of the year, following a gradual decrease from 84% in January to 44% in July. As summer peaks, the dry air allows for pleasant outdoor activities, making August an ideal time to enjoy Yountville's picturesque vineyards and warm-weather events. Interestingly, humidity begins to rise again in September, but for now, residents and visitors alike can relish the refreshing and crisp atmosphere that characterizes this late-summer month.
In August, Yountville experiences a UV Index of 10, categorized as very high, which markedly emphasizes the importance of sun safety during this time. As the summer season peaks, residents and visitors alike must be vigilant, with a burn time of only 15 minutes for unprotected skin. This trend follows the extreme levels recorded in June and July, showcasing a consistent pattern of heightened UV exposure from late spring through summer. Interestingly, as the days shorten into September, the UV Index drops to 9, yet still remains in the very high category. This gradual decline hints at shifting seasonal dynamics, but the need for sun protection remains imperative. For more detailed information on UV exposure, visit Yountville UV Index.
UV Risk Categories
As summer transitions into fall, August shares a delightful mix of sunshine in Yountville, providing 356 hours of radiant daylight. This month offers a slight dip from July's peak of 394 hours, yet still remains vibrant compared to the earlier months. From the brisk 141 hours of January to the sun-soaked peak in July, Yountville enjoys a steady upward trend in sun hours, with an impressive rise peaking in June at 384 hours. This gradual tapering in August hints at the upcoming change of seasons, leading into September's 314 hours, but the warmth of summer lingers, inviting residents and visitors alike to bask in this delightful climate before autumn sets in.
In Yountville, August shines brightly with an impressive 89% chance of sunny weather, making it one of the sunniest months of the year. This trend of increasing sunshine is evident as the summer months unfold, starting from a modest 37% in January and gradually ascending to peak around August. Following this sunny zenith, September remains favorable at 82%, but there's a noticeable dip as the year transitions into fall, with a steep decline to 50% by November. Overall, August stands out as a vibrant time, inviting visitors to bask in the nearly guaranteed sunshine before the festive fall brings cooler, cloudier days.
In Yountville, the rhythm of day and night beautifully unfolds throughout the year, with August marking a gentle transition as daylight begins to wane. The month boasts approximately 13 hours of daylight, a slight decrease from the 14 hours enjoyed during the peak of summer in July. This gradual shortening of days signals the shift towards autumn, following an upward trend from the 9 hours of daylight in January. As the year progresses, daylight steadily increases until it reaches its summer peak, before beginning to recede once more, lending a serene quality to the landscape as it prepares for the cozy months ahead. This pattern not only enriches the seasonal experience but also vividly illustrates the cycles of nature that Yountville embraces.
In Yountville, the August winds tend to whisper softly as the summer heat begins to wane, with an average wind speed of just 1.9 m/s (4 mph), making it one of the calmer months for this charming town. This slight drop from the May peak of 2.6 m/s (6 mph) reflects a broader trend seen throughout late summer and early fall, where wind speeds stabilize at the lower end of the scale. While the earlier months of spring, such as March and April, exhibit a gentle but steady breeziness, the transition to August signals a cozy, almost serene atmosphere perfect for savoring Yountville's renowned culinary delights outdoors. As September approaches, the winds remain tranquil, mirroring the mellow vibe that characterizes this idyllic Napa Valley destination.
The weather in Yountville 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 Yountville and find detailed weather information for every month.
August and January present striking contrasts in weather patterns. In August, temperatures soar with a minimum of 11°C (52°F) and a scorching maximum of 43°C (109°F), accompanied by very low humidity at 36% and no recorded precipitation. In stark contrast, January experiences much cooler temperatures, ranging from a minimum of -1°C (30°F) to a maximum of 26°C (78°F), along with significant rainfall totaling 127 mm (5.0 in) over 8 rainy days, and a much higher humidity level at 84%. For a more detailed look at January weather, you can check out Yountville weather in January.
August and February present stark contrasts in weather. In August, temperatures soar with a minimum of 11°C (52°F) and can reach highs of 43°C (109°F), while the average temperature sits at a comfortable 24°C (75°F). This month is characterized by dry conditions, with no recorded precipitation and a humidity level of just 36%. In contrast, February experiences much cooler temperatures, with a minimum of -3°C (28°F) and an average of 11°C (53°F), peaking at 27°C (81°F). This month is significantly wetter, receiving 120 mm (4.7 in) of precipitation over about seven days, coupled with a higher humidity level of 84%. For more detailed information on February weather, check out Yountville weather in February.
The weather in August is characterized by high temperatures, with minimums around 11°C (52°F) and scorching maximums reaching up to 43°C (109°F). This month enjoys dry conditions, marked by 0 mm of precipitation and low humidity at 36%. In stark contrast, March features milder temperatures, with a minimum of 0°C (32°F) and a maximum of 30°C (86°F). This month is considerably wetter, receiving 84 mm of precipitation over about 10 days, and experiences higher humidity levels at 83%. For more detailed insights, you can check Yountville weather in March.
When comparing the weather in August and April, significant differences emerge. August typically boasts a warm climate, with average temperatures around 24°C (75°F) and highs that can reach a scorching 43°C (109°F). In stark contrast, April experiences cooler temperatures, averaging 16°C (60°F), with a maximum of 33°C (92°F). Additionally, April is characterized by higher humidity levels at 81% and regular precipitation, accumulating about 32 mm (1.3 in) over five days, while August remains dry with no recorded rainfall. For more detailed insights, you can check out the Yountville weather in April.
In comparing the weather between May and August, there are notable differences in temperature and humidity. August typically presents a much warmer climate, with average temperatures reaching 24°C (75°F) and maximums soaring up to 43°C (109°F). In contrast, May has a cooler average of 19°C (66°F) and a peak of 38°C (101°F), making it more pleasant for outdoor activities. Additionally, August boasts dry conditions with no recorded precipitation and lower humidity at 36%, while May experiences more moisture with 20 mm of rainfall over two days and significantly higher humidity at 74%. For a detailed look at the climate specifics in May, you can visit Yountville weather in May.
In comparing the weather of August and June, we can observe some notable differences. August tends to be slightly warmer overall, with an average temperature of 24°C (75°F) and a maximum reaching up to 43°C (109°F), while June has a slightly cooler average of 23°C (74°F) and a maximum of 42°C (108°F). Notably, August records no precipitation, resulting in dry conditions and a lower humidity level of 36%, in stark contrast to June, which experiences minimal precipitation of 2 mm (0.1 in) and a higher humidity level of 64%. For more details, you can explore Yountville weather in June.
In comparing the weather of August and July, both months exhibit warm temperatures, but August tends to be slightly hotter overall. August has a minimum temperature of 11°C (52°F), an average of 24°C (75°F), and a maximum of 43°C (109°F), while July's temperatures range from a minimum of 12°C (54°F), an average of 24°C (76°F), to a maximum of 41°C (106°F). Notably, August recorded no precipitation, aligning with its dry conditions, while July experienced minimal precipitation at 1 mm (0.0 in). Additionally, humidity levels are lower in August at 36%, compared to 44% in July, suggesting a drier feel to the air as summer progresses. For more detailed information about July weather, you can check Yountville weather in July.
In August, temperatures range from a minimum of 11°C (52°F) to a maximum of 43°C (109°F), with an average temperature of 24°C (75°F) and no recorded precipitation. The humidity during this month is relatively low at 36%. In contrast, September experiences slightly cooler conditions, with minimum temperatures dropping to 7°C (45°F) and an average of 22°C (72°F). The maximum temperature in September reaches 44°C (112°F), but it still remains dry with only 1 mm (0.0 in) of precipitation and no rainy days. Humidity also increases to 44%, making the atmosphere feel a bit more humid compared to August. For more detailed insights, check out Yountville weather in September.
August generally features significantly warmer temperatures compared to October, with average highs reaching up to 43°C (109°F) and minimal precipitation, contributing to a dry climate. In contrast, October experiences cooler temperatures, averaging around 19°C (66°F), and sees an increase in humidity levels at 65%, along with some light rainfall—31 mm (1.2 in) over two days. This shift in weather conditions marks a transition from the intense summer heat of August to the milder, more comfortable autumn temperatures typical of October. For more detailed weather insights, you can check Yountville weather in October.
August weather is characterized by warm temperatures, with minimums around 11°C (52°F) and maximums reaching a scorching 43°C (109°F). The month sees no precipitation and low humidity at 36%, making it a dry and hot time. In contrast, November offers a cooler climate, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 29°C (85°F). This month experiences an average temperature of 13°C (56°F) and notable precipitation of 43 mm (1.7 in) over five days, along with increased humidity at 84%. For a more detailed overview of November's weather, check out Yountville weather in November.
August and December present stark contrasts in weather. In August, temperatures soar with a minimum of 11°C (52°F) and highs reaching up to 43°C (109°F), creating a hot and dry atmosphere with no recorded precipitation. The humidity is relatively low at 36%, offering a warm, sunny climate. In contrast, December brings cooler temperatures, with a minimum of 0°C (33°F) and an average of 10°C (50°F), peaking at 23°C (75°F). This month experiences significant precipitation, totaling 87 mm (3.4 in) over eight days, leading to an increase in humidity to 83%. For more details on December weather, check out Yountville weather in December.
As August rolls in, Yountville experiences remarkably warm temperatures, typically enjoying clear skies and a lack of precipitation. Unlike the cooler months that precede it, which often bring a bit of moisture and higher humidity levels, August stands out with its dry conditions and an average warmth that invites outdoor activities and wine tastings. Visitors can revel in the sun with minimal interruption, making it an ideal time to explore what this charming town has to offer. For more detailed insights on annual patterns, check out the comprehensive information available on the Yountville Climate.