Last updated: February 24, 2025
September in Oakland, United States, presents a delightful climate characterized by mild temperatures and low precipitation. Maximum highs can reach an impressive 40°C (104°F), while the average settles around a comfortable 19°C (66°F), with minimums dropping to a refreshing 8°C (48°F). Remarkably, the month experiences no recorded precipitation, contributing to a dry atmosphere with a humidity level hovering at 55%. This combination makes September an ideal time for outdoor activities, with plenty of sunny days to enjoy the vibrant city and its surroundings.
In September, Oakland experiences a noticeable transition in temperatures, marking the tail end of summer with a minimum of 8°C (48°F) and an invigorating average of 19°C (66°F). The city can heat up significantly, soaring to a maximum of 40°C (104°F), making it one of the hottest months of the year. This month sees a drop from the higher temperatures of August, yet still maintains a warm ambiance, perfect for enjoying outdoor activities. As the days gradually shorten, the warmth begins to hint at the cooler fall months ahead, inviting both locals and visitors to relish the last vibrant days of warmth before the seasonal shift.
September in Oakland typically marks the tail end of the dry season, with a negligible precipitation total of just 1 mm (0.0 in) — the last remnants of summer's arid grip. This month stands out as one of the driest, with 0 recorded precipitation days, emphasizing the transition toward the wetter months ahead. As the city braces for the coming fall and winter rains, the stark contrast to the early year’s deluge, such as 94 mm (3.7 in) in January and 91 mm (3.6 in) in February, becomes evident. This pattern reveals a clear trend: Oakland's September represents a significant ebb in rainfall, setting the stage for the gradual increase in precipitation that follows in October and November.
As summer fades into fall, September in Oakland experiences a gentle dip in humidity, settling at a comfortable 55%. This marks a slight increase from the peak summer months, where humidity reached a low of 54% in August. The trend showcases a gradual rise in moisture levels as the city transitions into the wetter months ahead, with humidity levels expected to increase notably by October. This transitional period offers residents a reprieve from the sweltering heat while hinting at the refreshing changes brought by autumn rain. Overall, September’s humidity reflects a balanced blend of warmth and crispness, perfect for enjoying the outdoors.
As September rolls into Oakland, the UV Index remains high at 9, indicating a very high exposure category, with a burn time of only 15 minutes. This slight dip from the peak summer months, where the UV Index reached a maximum of 11 in both June and July, suggests the onset of autumn but still requires vigilance when spending time outdoors. The trend shows that while late summer and early fall maintain elevated UV levels, protective measures like sunscreen and clothing remain essential to safeguard against skin damage. As temperatures start to cool down, users should stay informed about UV exposure to enjoy the beautiful California sun responsibly. For more detailed information, check out the Oakland UV Index.
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As the warm embrace of September descends upon Oakland, residents revel in an impressive 299 hours of sunshine, marking a peak that beautifully complements the summer's lingering warmth. Throughout the year, sunshine hours steadily rise from a modest 151 hours in January to a summer high, with June basking in 355 hours. September's golden days exemplify this gradual ascent, showcasing a delightful transition from the vibrant summer months to the gentler hues of autumn. As daylight begins to wane towards October, the charm of a well-spent September resonates, inviting outdoor activities and communal gatherings under clear blue skies. It's a season where every sunbeam seems to celebrate the vibrant tapestry of life in Oakland.
In September, residents of Oakland can anticipate a 60% chance of sunny weather, marking a slight dip from the summer months yet still promising a generous amount of sunshine. This month continues the trend of warmer, brighter days that peak in May (70%) and gradually decrease as autumn approaches. Compared to earlier months like January (39%) and November (46%), September enjoys a more favorable outlook, benefiting from the lingering warmth of summer. Overall, while September may not boast the highest likelihood of sun, it still offers a delightful blend of warmth and sunshine, making it an inviting time for outdoor activities before the cooler months settle in.
As September unfolds in Oakland, the city experiences a gentle transition in daylight, with an average of 12 hours gracing the skies. Following the vibrant stretch of summer months, where daylight peaked at 14 hours in both May and June, September marks a subtle decline as the days gradually shorten. This trend mirrors the seasonal progression, dipping from the summer's peak before heading into the shorter days of fall, where October will bring approximately 11 hours of daylight. The rhythmic ebb and flow of daylight throughout the year not only highlights the passage of time but also sets the stage for the cozy vibes of autumn, inviting residents to savor the warm sunsets that September still generously offers.
As September rolls into Oakland, the average wind speed begins to soften, dipping to 2.6 m/s (6 mph)—a slight decline from the breezy days of summer. This gentle decrease marks a transition from the warmer months, where wind speeds peaked at 3.9 m/s (9 mph) in May, to the cooler autumn air. Interestingly, September's winds are reminiscent of earlier months like October and December, both holding steady at 2.6 m/s (6 mph), suggesting a seasonal consistency as the year progresses. Overall, September’s winds offer a refreshing change, inviting the vibrant colors of fall while providing a soothing backdrop for outdoor activities.
The weather in Oakland 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 Oakland and find detailed weather information for every month.
September and January exhibit stark contrasts in weather conditions. September typically presents a warm climate, with average temperatures around 19°C (66°F) and a maximum that can reach up to 40°C (104°F). The month is quite dry, recorded with only 1 mm of precipitation and an average humidity of 55%. In contrast, January is markedly cooler, with average temperatures dropping to 10°C (51°F) and maximums capping at 25°C (78°F). This month sees significantly more rainfall, totaling 94 mm (3.7 in) over about 8 days, accompanied by higher humidity levels at 82%. For more specific insights on January weather, you can check Oakland weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a chilly 8°C (48°F) at night to a scorching 40°C (104°F) during the day, with an average of 19°C (66°F). This month is characterized by minimal precipitation, with just 1 mm recorded and no rainy days, while humidity sits at a moderate 55%. In stark contrast, February offers much cooler temperatures, starting at a minimum of 1°C (34°F) and reaching a maximum of 26°C (78°F), with an average of just 11°C (53°F). This month experiences significantly higher precipitation—91 mm over eight days—and a higher humidity level of 84%. For a more detailed look at February weather, you can visit Oakland weather in February.
In September, the weather is typically warmer, with average temperatures around 19°C (66°F) and a striking maximum of 40°C (104°F), while experiencing minimal precipitation with only 1 mm and no rainy days. In sharp contrast, March presents a cooler climate, featuring an average temperature of 12°C (54°F) and a maximum of 27°C (81°F). March is also characterized by significantly higher precipitation of 73 mm over 10 days, and humidity levels rise to 82%. For more detailed insights into the weather conditions during this month, visit Oakland weather in March.
When comparing the weather between September and April, we can see notable differences in temperature and precipitation. September typically experiences a broader temperature range, with minimums around 8°C (48°F) and maximums soaring to 40°C (104°F), whereas April's temperatures are milder, with a minimum of 4°C (40°F) and a maximum of 31°C (88°F). Additionally, September is characterized by very low precipitation, recording only 1 mm over the month and often remaining dry, while April sees a significant increase in rainfall with 29 mm over five rainy days, resulting in higher humidity levels at 78%. This distinction highlights the transition from the warm summer months in September to the cooler, wetter spring of April. For more detailed insights into April weather, check out Oakland weather in April.
In comparing the weather of September and May, we can observe notable differences in temperature and humidity. September boasts a wider temperature range with a minimum of 8°C (48°F) and a maximum that can soar up to 40°C (104°F), while maintaining an average of 19°C (66°F). In contrast, May tends to be cooler, starting at 6°C (44°F) and capping at a maximum of 32°C (90°F) with an average of 15°C (60°F). Additionally, September experiences very dry conditions with no recorded precipitation, while May sees a moderate amount of rainfall, with 18 mm (0.7 in) over approximately 2 days, and carries higher humidity levels at 71%. For more details, you can check out Oakland weather in May.
In comparing the weather of September and June, we see that September tends to be warmer overall, with average temperatures reaching 19°C (66°F) compared to June's 18°C (64°F). September can also spike with maximum temperatures hitting as high as 40°C (104°F), while June's maximum is slightly lower at 37°C (99°F). Although both months experience minimal precipitation, September has an edge with only 1 mm (0.0 in) of rain compared to June's 2 mm (0.1 in), and neither month has any recorded rainy days. Humidity levels are also slightly different, with September at 55% and June at a higher 64%. For more details, check out Oakland weather in June.
In comparing September and July weather, September offers a broader temperature range, with minimums dipping to 8°C (48°F) and maximums soaring to 40°C (104°F). In contrast, July's temperatures are slightly milder, ranging from a minimum of 11°C (53°F) to a maximum of 32°C (90°F). Both months experience minimal precipitation, with September recording just 1 mm and July seeing none at all. Humidity levels are also comparable, with September at 55% and July slightly higher at 58%. For those interested in a more detailed look at July weather, check out Oakland weather in July.
In comparing the weather of September and August, we see some notable differences. September boasts a slightly wider temperature range, with minimums dropping to 8°C (48°F) and maximums reaching up to 40°C (104°F). In contrast, August has higher minimum temperatures at 11°C (52°F) and a lower maximum of 37°C (99°F). Both months record minimal to no precipitation, with September receiving just 1 mm and August staying completely dry. Humidity levels in both months are quite similar, with September at 55% and August slightly lower at 54%. For a deeper insight into August weather, you can check Oakland weather in August.
September typically offers warmer weather, with temperatures ranging from a minimum of 8°C (48°F) to a scorching maximum of 40°C (104°F), alongside a very dry climate with only 1 mm of precipitation over the month. On the other hand, October experiences cooler temperatures with a minimum of 5°C (41°F) and a maximum of 34°C (93°F), along with increased moisture, characterized by 24 mm of rainfall over just one day. Additionally, humidity rises slightly in October to 62%, compared to September's 55%. For more detailed information about conditions during this month, you can check Oakland weather in October.
September weather is characterized by warmer temperatures, with averages around 19°C (66°F) and maximums soaring up to 40°C (104°F), accompanied by low humidity at 55% and minimal precipitation. In contrast, November brings cooler weather, with average temperatures dropping to 13°C (56°F) and a maximum of 27°C (81°F). This month also experiences significantly more precipitation, totaling 42 mm (1.7 in) over an average of 5 days, along with increased humidity at 78%. For more detailed information, check out Oakland weather in November.
In September, the weather is notably warmer with temperatures ranging from a cool 8°C (48°F) to a scorching high of 40°C (104°F), accompanied by minimal precipitation and moderate humidity levels of 55%. In contrast, December brings much cooler temperatures, with a range from 2°C (35°F) to a maximum of 23°C (74°F), along with significant rainfall totaling 80 mm (3.2 inches) over about 8 days, and higher humidity at 80%. This shift from the dry heat of September to the wetter chill of December clearly marks the transition between the seasons. For more details on the December climate, check out Oakland weather in December.
As September rolls in, Oakland experiences a delightful transition characterized by warm temperatures and minimal precipitation. Unlike the cool, foggy mornings typical of the summer months or the drenching rains of winter, September enjoys a pleasantly moderate climate with an average temperature of around 19°C (66°F) and strikingly low humidity levels of 55%. Residents and visitors alike revel in the sunny days, making it an ideal time for outdoor activities and events. With just a whisper of rain—only 1 mm throughout the month—it’s a great opportunity to soak up the sun and enjoy everything this vibrant city has to offer. For a deeper dive into the climate patterns, check out Oakland Climate.