Last updated: February 24, 2025
Experience the diverse weather of Healdsburg, United States in September, where temperatures can soar to a sizzling 41°C (105°F), while the average hovers around a pleasant 20°C (69°F). Nights bring a refreshing coolness, with lows dipping to 7°C (45°F). This month boasts minimal precipitation, with only 2 mm (0.1 in) recorded across 0 days, ensuring mostly clear skies for outdoor adventures. With humidity levels at a comfortable 68%, September in Healdsburg is perfect for wine tasting and exploring the picturesque landscapes.
In September, temperatures in Healdsburg experience a delightful transition, with a minimum of 7°C (45°F) and an average of 20°C (69°F). This month marks a shift toward warmer weather as the average climbs to 41°C (105°F), mirroring the peak warmth seen in the height of summer. The lingering heat of summer can still be felt, making it one of the warmest months in the region. As autumn approaches, the days remain pleasantly warm, encouraging outdoor activities against the backdrop of stunning fall foliage. Overall, September blends the tail end of summer's heat with the early hints of autumn, offering a unique climate that residents and visitors alike cherish.
In September, Healdsburg experiences a significant lull in precipitation, with only 2 mm (0.1 in) recorded across the entire month, marking it as one of the driest times of the year. This trend is notable as it follows a summer of complete dry spells in July and August. With 0 precipitation days, September exemplifies the transition from the sweltering summer to the onset of fall, setting the stage for gradually increasing moisture levels in October and beyond. This consistent dip in rainfall highlights a clear seasonal pattern, where the year begins with robust precipitation and tapers off during the summer, only to witness a slight resurgence as autumn approaches.
As September arrives in Healdsburg, the air starts to shift, showcasing a slight uptick in humidity at 68%. While this marks a small increase from the drier months of July and August, the humidity remains notably lower compared to the damp conditions experienced in the early months of the year, particularly January's peak of 86%. This gradual fluctuation highlights a seasonal trend where the summer warmth begins to mellow, yet retains enough moisture to maintain a comfortable atmosphere. As the region transitions into autumn, the rise in humidity serves as a gentle reminder of Healdsburg's diverse climate, bridging the gap between the dry summer heat and the wetter winter months ahead.
As summer fades into fall in Healdsburg, the UV Index begins to decline, yet September maintains a notable UV Index of 9, categorizing exposure as very high. This signals that while temperatures may cool, the sun's intensity remains significant, requiring vigilant skin protection with a burn time of just 15 minutes. Following the peak in July and August, where indices hit 11 (extreme), the region sees a slight drop in September but still urges caution. It's crucial to stay informed and enjoy outdoor activities responsibly during this transitional month. For detailed insights, visit Healdsburg UV Index.
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As summer transitions into fall, September in Healdsburg basks in a delightful 312 hours of sunshine, marking a noticeable dip from the peak of July's 390 hours. This month maintains a vibrant aura as daylight begins to wane, signaling the shift towards the cozy embrace of autumn. August's 349 hours also sets the stage, showcasing a gradual retreat of summer warmth. The pattern reveals a seasonal rhythm, where the sunlit days of late summer gently yield to the softer glows of October and November, each month providing its unique charm. Overall, September stands out as a pristine bridge between the exuberant brightness of summer and the tranquil hues of fall, making it a lovely time to savor the outdoors.
In Healdsburg, United States, the likelihood of experiencing sunny weather in September stands at a promising 76%, which reflects a continuation of the region's trend toward warmer, sunnier days as summer transitions to fall. With a gradual increase from 37% in January to a peak of 85% in May, the chances of sunshine remain relatively high throughout the summer months, hovering around the 84% mark in both July and August. As the seasons change, September witnesses a slight dip, but still offers more sunshine than many other months, particularly when compared to the gloomier start of the year. This makes September an ideal time for outdoor activities in Healdsburg, as the sun still shines brightly, allowing residents and visitors alike to enjoy the beautiful wine country before autumn sets in.
As summer fades into autumn, September in Healdsburg experiences a gentle decline in daylight, offering around 12 hours of sunshine each day. This marks a subtle transition from the sun-drenched days of July and August, which boast a maximum of 14 hours of light. From this point, daylight hours gradually decrease, setting the stage for the cozy embrace of fall. This month exemplifies the beauty of change, blending longer evenings with pleasant afternoons, inviting locals and visitors alike to relish the warmth of seasonal gatherings under the setting sun.
In September, Healdsburg experiences a gentle breeze with an average wind speed of 1.9 m/s (4 mph), mirroring the calmness of the preceding summer months. This consistency reflects a broader trend, as both July and August also recorded the same wind speed, creating a serene atmosphere perfect for enjoying outdoor activities and the region's famous vineyards. As the year progresses into October, a slight uptick to 2.1 m/s (5 mph) suggests the arrival of cooler autumn air, hinting at seasonal transitions while maintaining a generally mild wind pattern that characterizes Healdsburg's climate.
The weather in Healdsburg changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Healdsburg and find detailed weather information for every month.
In September, Healdsburg experiences a warmer climate with an average temperature of 20°C (69°F) and a maximum reaching up to 41°C (105°F), while the minimum temperature is relatively mild at 7°C (45°F). The month is quite dry, with only 2 mm of precipitation and no rainy days, accompanied by a humidity level of 68%. In contrast, January brings significantly cooler weather, with temperatures ranging from a minimum of -2°C (28°F) to an average of 9°C (49°F), peaking at 24°C (75°F). This month is much wetter, recording 139 mm of rainfall over 8 days, and features higher humidity at 86%. For more detailed information, check out Healdsburg weather in January.
In comparing the weather of September and February, a stark contrast emerges. September boasts a comfortable average temperature of 20°C (69°F) and can peak at a scorching 41°C (105°F), while February's average retracts to a cooler 10°C (50°F) with maximums reaching 26°C (80°F). Interestingly, September tends to be dry, with only 2 mm of precipitation and no rainy days, while February experiences a significant increase in precipitation at 155 mm (6.1 in) over approximately 8 rainy days. Additionally, February's humidity level is higher at 84%, compared to September's 68%. For more detailed insights, check out Healdsburg weather in February.
In comparing the weather between September and March, it's clear that September offers much warmer temperatures, with a minimum of 7°C (45°F) and an average high of 41°C (105°F), whereas March experiences cooler conditions, with temperatures ranging from a chilly -1°C (30°F) to a more moderate high of 28°C (83°F). September is characterized by dry conditions, featuring only 2 mm of precipitation over no days, leading to a humidity level of 68%. In stark contrast, March sees significantly more rainfall, totaling 97 mm (3.8 in) over 11 days, resulting in higher humidity levels of 83%. For more detailed information, you can check out Healdsburg weather in March.
September sees warmer temperatures with an average of 20°C (69°F) and a maximum that can soar to 41°C (105°F), making it a generally hot month with very little precipitation, averaging only 2 mm. In contrast, April offers a cooler climate with an average temperature of 14°C (57°F) and a maximum of 31°C (89°F). It is also a wetter month, with total precipitation reaching 45 mm (1.8 in) over five days, contributing to a higher humidity level of 80%. For more specific details on the climate during this time, you can check out Healdsburg weather in April.
In September, the weather in Healdsburg is generally warmer, with an average temperature of 20°C (69°F) and a maximum reaching up to 41°C (105°F). The month experiences very little precipitation, with just 2 mm (0.1 in) and no rainy days, leading to a lower humidity of 68%. In contrast, May is cooler with an average of 17°C (62°F) and a maximum of 35°C (96°F). This month sees more rainfall, with a total of 27 mm (1.1 in) spread across three rainy days, resulting in higher humidity levels at 80%. For more insights on the weather patterns, you can check Healdsburg weather in May.
In comparing the weather between September and June, both months exhibit similar temperature ranges, with average highs hovering around 40°C (105°F) in June and 41°C (105°F) in September. The minimum temperatures are slightly warmer in June, starting at 8°C (47°F) compared to September's 7°C (45°F). Precipitation levels remain consistent, with both months recording minimal rainfall at just 2 mm (0.1 in) and no rainy days, though humidity is noticeably higher in June at 76% compared to 68% in September. For a deeper look into June's weather specifics, you can check Healdsburg weather in June.
In comparing the weather between September and July, September tends to be slightly cooler with an average temperature of 20°C (69°F), while July has a marginally warmer average of 22°C (71°F). Additionally, September offers a wider range in temperature, reaching a maximum of 41°C (105°F) compared to July’s peak of 38°C (101°F). Both months experience very little precipitation, but September sees a minor amount of rain at 2 mm, whereas July is completely dry with no recorded precipitation, as highlighted in the link Healdsburg weather in July. Humidity levels remain comparable, with September at 68% and July slightly higher at 70%.
In comparing the weather of September to August, September experiences slightly cooler minimum temperatures, averaging 7°C (45°F), compared to August's minimum of 10°C (51°F). The average temperature remains similar, with September averaging 20°C (69°F) and August slightly warmer at 21°C (71°F). September also sees a higher maximum temperature of 41°C (105°F) versus August's peak of 38°C (101°F). Notably, both months record minimal precipitation, with September receiving only 2 mm (0.1 in) of rain over no days, while August remained completely dry at 0 mm. Humidity levels are fairly comparable, with September at 68% and August slightly lower at 66%. For more details on August weather, you can visit Healdsburg weather in August.
In September, the weather is warm with average temperatures around 20°C (69°F), peaking at a scorching 41°C (105°F), while experiencing very little precipitation. The month typically boasts dry conditions with zero recorded rainfall and a humidity level of 68%. In contrast, October brings a noticeable drop in temperatures, with averages around 17°C (63°F) and maximums capping at 35°C (96°F). This month also sees increased precipitation, totaling 41 mm (1.6 in) over a couple of days, and a slight increase in humidity at 72%. For more detailed information, check out Healdsburg weather in October.
September and November present quite a contrast in weather. In September, temperatures can soar to a high of 41°C (105°F) with an average of 20°C (69°F) and a relatively dry atmosphere, featuring only 2 mm of precipitation and humidity at 68%. On the other hand, November brings cooler temperatures with a minimum of -1°C (30°F) and an average of 12°C (54°F). This month is significantly wetter, receiving 58 mm (2.3 in) of rain over five days, along with higher humidity at 84%. For more specific details on November weather, you can check out Healdsburg weather in November.
September and December present stark contrasts in weather patterns. In September, temperatures range from a mild 7°C (45°F) at night to a scorching 41°C (105°F) during the day, with an average of 20°C (69°F). The month is characterized by minimal precipitation, recording just 2 mm and experiencing no rainy days, accompanied by a humidity level of 68%. In sharp contrast, December sees much cooler temperatures, with a minimum of -2°C (29°F), an average of 9°C (48°F), and a maximum of 23°C (73°F). The month is much wetter, accumulating 101 mm of precipitation over 8 days, and the humidity rises to 84%. For a more detailed outlook, check out the Healdsburg weather in December.
As summer gives way to fall, September in Healdsburg brings a delightful shift in weather, characterized by warmer days and cool evenings. The average temperature settles comfortably around 20°C (69°F), providing the perfect backdrop for outdoor activities without the stifling heat often experienced in the peak summer months. With virtually no precipitation and a humidity level that dances at 68%, this month is ideal for exploring the vibrant wineries and lush landscapes without the worry of sudden showers. For those keen to embrace this beautiful transition, the September weather offers a unique charm that sets it apart from the rest of the year. Discover more about the distinct climate patterns by visiting Healdsburg Climate.