Last updated: February 24, 2025
Experience the vibrant August weather in Sonoma, United States, where temperatures soar with a maximum of 36°C (98°F) under plenty of sunshine. The month averages a comfortable 20°C (68°F), offering pleasant evenings that invite outdoor relaxation. With a cool minimum dipping to 11°C (52°F), this month provides a delightful range for all preferences. Notably, Sonoma enjoys a completely dry August, boasting 0 mm of precipitation with 0 rainy days, complemented by a moderate humidity level of 66% that makes for ideal summer exploration and enjoyment of the region's renowned vineyards and natural beauty.
In August, Sonoma basks in warm sunshine, with temperatures that perfectly reflect the peak of summer. The month typically sees a minimum of 11°C (52°F), rising to an average of 20°C (68°F), and often reaching a maximum of 36°C (98°F). This pattern marks a slight elevation from the previous month, where July maintains similar averages but slightly lower maximums. August serves as a precursor to the gradual cooling of September, allowing residents and visitors to relish warm days and mild evenings. The temperature trend indicates that while the heat remains intense, it gently sets the stage for the upcoming transition into autumn, making it an ideal time for outdoor festivities and vineyard explorations.
In August, Sonoma experiences a notable dry spell, with precipitation amounting to 0 mm and no rainfall days recorded. This pattern continues from July, reflecting a broader trend of minimal precipitation during the summer months. As the region transitions into autumn, precipitation begins to pick up in September and October, signaling a shift as the rainy season approaches. This consistent lack of rainfall in August aligns with the typical dry climate central to Sonoma's summer months, showcasing the stark contrast with the wetter winter and spring periods earlier in the year, where rainfall is a much more common occurrence.
In August, Sonoma experiences a notable dip in humidity, reaching around 66%. This trend marks a significant decrease from the earlier months, with levels peaking at 86% in January and gradually descending throughout the summer. By the time August rolls around, the warm, dry air gives locals and visitors alike the perfect opportunity to enjoy outdoor activities without the intense stickiness of high humidity. As September follows with a slight uptick to 68%, it suggests the close of summer is a transitional period, leading back to the wetter months of fall, where humidity levels surge again to 84% in November and December. The rhythm of Sonoma's humidity reflects the ebb and flow of the seasons, painting a picturesque landscape that evolves through the year.
In August, Sonoma experiences a very high UV Index of 10, making it essential for residents and visitors to be cautious when exposed to sunlight. This trend of elevated UV levels continues from the extreme conditions typically seen in June and July (both at index levels of 11), showcasing a sustained period of solar intensity during the summer months. With a burn time of just 15 minutes, the importance of protection increases, encouraging the use of sunscreen, protective clothing, and seeking shade. As summer winds down, it’s important to stay vigilant about UV exposure, especially as September approaches with a slightly lower UV Index of 9. For more detailed information on UV levels throughout the year, check out Sonoma UV Index.
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August in Sonoma offers a delightful continuation of the summer's warmth, boasting 356 hours of sunshine. This month follows a peak in July, which reaches 394 hours, providing an abundant sunlit backdrop for outdoor activities and vineyard tours. As summer transitions into autumn, the sunlight begins to gradually decline, with September still enjoying a generous 314 hours before the sun's embrace weakens to 280 hours in October. This trend highlights the region’s vibrant summer and a gentle easing into fall, inviting visitors to revel in the beauty of late-summer adventures while savoring the golden warmth that Sonoma is famed for.
In August, Sonoma enjoys a 75% chance of sunny weather, making it one of the peak months for sunshine in the region. This trend follows a steady climb in sunlit days, starting from 39% in January and gradually increasing to 82% by May. Although July peaks slightly higher at 71%, August’s warm, sunny days contribute to the vibrant summer atmosphere that locals and visitors alike cherish. As summer transitions into fall, the likelihood of sunshine remains favorable, with September also boasting a solid 73% chance. This consistency in sunny weather not only enhances outdoor activities but also underscores Sonoma’s appeal as a summer getaway.
In August, Sonoma enjoys approximately 13 hours of daylight, a slight dip from the peak of 14 hours experienced in the previous months of June and July. This gradual decline marks the transition towards shorter days as summer gives way to fall. As the month progresses, the daylight diminishes, leading into September when it reduces to 12 hours. This pattern reflects a broader trend observed throughout the year, where longer days in spring and summer gradually retreat to the cozy, shorter days of fall and winter. Despite the decrease, August still offers plentiful sunlight, perfect for enjoying the vibrant landscapes of Sonoma before the cooler seasons arrive.
In Sonoma, the August wind brings a gentle breeze, with an average speed of 2.2 m/s (5 mph), slightly dipping from the warm gusts of midsummer. As the year progresses, the wind tends to follow a subtle trend: it peaks in May at 3.2 m/s (7 mph) before gradually calming down through the summer months. This gradual decline continues into the fall, where wind speeds hover around the lower end of the spectrum. August, with its serene winds, reflects the region’s shift from the vibrant energy of summer towards the tranquility of early autumn, inviting leisurely afternoons spent soaking in the serene landscape.
The weather in Sonoma 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 Sonoma and find detailed weather information for every month.
In August, the weather in Sonoma is warm and relatively dry, with temperatures ranging from a cool 11°C (52°F) at night to a scorching 36°C (98°F) during the day. The month boasts an average temperature of 20°C (68°F) and experiences no precipitation, alongside a moderate humidity of 66%. In contrast, January brings a notable chill, with temperatures dipping to a minimum of -1°C (31°F) and averaging around 10°C (50°F). This month is marked by significantly higher precipitation, receiving about 125 mm (4.9 in) over roughly 9 days, contributing to an increased humidity level of 86%. For more detailed insights on January weather specifics, you can visit Sonoma weather in January.
August and February present contrasting weather conditions that highlight the seasonal shifts. In August, temperatures soar with minimums of 11°C (52°F) and maximums reaching as high as 36°C (98°F), characterized by a dry climate with no recorded precipitation and an average humidity of 66%. Conversely, February experiences much cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 26°C (79°F), accompanied by significant rainfall totaling 127 mm (5.0 in) across about eight days, leading to a higher humidity level of 84%. This stark difference not only affects outdoor activities but also influences the overall ambiance of the area. For more details on the February climate, check out Sonoma weather in February.
August and March present contrasting weather patterns. In August, temperatures can soar with a minimum of 11°C and an average of 20°C, peaking at a hot 36°C, while experiencing virtually no precipitation. The humidity level rests at a comfortable 66%. Conversely, March features cooler temperatures with a minimum of 1°C, an average of 12°C, and a maximum of 27°C. It also sees a significant amount of rain, with 84 mm of precipitation over approximately 10 days, and higher humidity at 83%. These differences highlight the transition from the dry warmth of late summer in August to the wetter, cooler conditions typical of early spring in March. For more information, you can check out Sonoma weather in March.
When comparing the weather in August and April, it is clear that August tends to be significantly warmer and drier. In August, the temperatures range from a minimum of 11°C (52°F) to a maximum of 36°C (98°F), with an average of 20°C (68°F) and no recorded precipitation. This contrasts with April, where temperatures are cooler, ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F), with an average of 14°C (58°F) and a total precipitation of 36 mm (1.4 in) over five days. Additionally, April experiences higher humidity at 80%, compared to August's 66%. For more details on April weather specifics, you can explore Sonoma weather in April.
When comparing the weather in August and May, notable differences emerge, particularly in temperature and humidity. August boasts a comfortable average temperature of 20°C (68°F), with highs reaching up to 36°C (98°F). In contrast, May's average temperature is slightly cooler at 17°C (62°F), with a maximum of 34°C (93°F). Additionally, August is characterized by dry conditions, with no precipitation and a humidity level of 66%, whereas May experiences some rainfall, totaling 21 mm (0.8 in) over three days, contributing to a higher humidity of 80%. For more detailed insights on May weather, you can visit Sonoma weather in May.
When comparing the weather of August to that of June, we observe some interesting similarities and differences. Both months have an average temperature of 20°C (68°F), but August tends to feature lower humidity at 66% compared to June’s 76%. In terms of temperature extremes, August has a minimum of 11°C (52°F) and a maximum of 36°C (98°F), while June offers a slightly cooler minimum of 10°C (50°F) and a higher maximum of 37°C (99°F). Notably, both months experience minimal precipitation, with August recording no precipitation at all, while June sees a mere 1 mm (0.1 in) of rain across zero days. For a more detailed look at June's climate, you can explore Sonoma weather in June.
In comparing the weather between August and July, we observe that both months feature similar temperature ranges, with minimum temperatures around 11°C (52°F) and average temperatures of 20°C (68°F). However, August experiences slightly higher maximum temperatures, reaching 36°C (98°F), compared to July's peak of 36°C (96°F). Both months boast dry conditions, recording no precipitation and no rainy days. Humidity levels are also similar, with August at 66% and July slightly higher at 70%. For a closer look at July's weather specifics, you can visit Sonoma weather in July.
August and September exhibit notably similar average temperatures, both hovering around 20°C (68°F). However, August experiences a broader temperature range, with a minimum of 11°C (52°F) and a maximum of 36°C (98°F), while September’s minimum dips slightly to 9°C (48°F) and can reach up to 39°C (102°F). Precipitation is minimal in both months, with August recording no rainfall and September registering just 1 mm, and neither month sees any rainy days. Humidity levels increase slightly in September to 68%, compared to August's 66%. For more detailed information about September weather, you can check Sonoma weather in September.
In August, the weather is characterized by high temperatures, with minimums around 11°C (52°F) and maximums peaking at 36°C (98°F), while enjoying dry conditions with no recorded precipitation. In contrast, October brings cooler temperatures, ranging from a minimum of 4°C (40°F) to a maximum of 34°C (94°F), along with increased humidity at 72% and some precipitation, totaling 33 mm (1.3 in) over two days. This shift from August's heat to October's milder climate creates a significant transition as fall begins. For more details on the October weather patterns, you can check Sonoma weather in October.
August and November present starkly contrasting weather conditions. In August, the temperatures soar, with a minimum of 11°C (52°F) and a maximum reaching up to 36°C (98°F), accompanied by a dry climate with no recorded precipitation and a relatively lower humidity of 66%. In contrast, November brings cooler temperatures, ranging from a chilly minimum of 1°C (33°F) to a pleasant maximum of 27°C (81°F). This month also experiences increased precipitation, totaling 50 mm (2.0 in) over approximately five rainy days, along with higher humidity at 84%. For a closer look at November conditions, check out Sonoma weather in November.
In August, the weather is considerably warmer, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 36°C (98°F) and an average of 20°C (68°F), complemented by low humidity at 66% and no recorded precipitation. In stark contrast, December brings much cooler temperatures, with a minimum of 0°C (33°F), an average of 10°C (50°F), and a maximum of 23°C (73°F). Additionally, December experiences a significant amount of precipitation, averaging 94 mm (3.7 in) over 9 days, along with increased humidity at 84%. For more details on the weather in Sonoma during December, visit Sonoma weather in December.
In August, Sonoma experiences a delightful departure from the cooler months, with warm temperatures that can peak at 36°C (98°F), making it one of the hottest times of the year. This warmth is complemented by an average temperature of 20°C (68°F), creating ideal conditions for outdoor activities and vineyard visits. Unlike other months, you can expect no rainfall, allowing for plenty of sunshine and dry days—perfect for enjoying all that this beautiful region has to offer. With a humidity level of 66%, the weather remains comfortable, inviting locals and tourists alike to revel in the bounty of late summer. For those interested in the seasonal shifts and overall climate pattern, you can find more details at Sonoma Climate.