Last updated: February 24, 2025
Experience September's delightful weather in Santa Barbara, where warm days and cool nights create the perfect backdrop for outdoor activities. With maximum temperatures reaching a sunny 36°C (97°F) and an average of 21°C (70°F), the month boasts pleasant conditions ideal for beach outings and scenic adventures. Temperatures dip to a comfortable minimum of 9°C (48°F) at night, allowing for a refreshing close to the day. Notably, precipitation is minimal, with just 2 mm (0.1 in) of rain recorded and no rainy days, while humidity hovers around a comfortable 48%. Whether you're soaking up the sun or exploring the vibrant local culture, September in Santa Barbara offers an inviting and enjoyable climate.
September in Santa Barbara marks a delightful transition into autumn, with temperatures reflecting a pleasant balance between summer warmth and cooler fall breezes. The average temperature hovers around 21°C (70°F), showcasing a comfortable climate for outdoor activities. The minimum dips to 9°C (48°F), providing a refreshing feel in the early mornings and evenings, while daily highs can soar up to 36°C (97°F), reminiscent of summer's peak. This month continues July and August's warmth but hints at the approaching change, making it an ideal time to enjoy the last golden days before the cooler months arrive. Santa Barbara offers a perfect backdrop for enjoying everything from beach outings to evening strolls, emphasizing the lingering warmth of summer.
September in Santa Barbara marks the tail end of the dry season, with precipitation levels remaining remarkably low. Registering just 2 mm (or 0.1 inches), this month reflects a continuation of the parched conditions that began in the earlier summer months, where July and August similarly recorded minimal rainfall. Notably, September has seen zero precipitation days, underscoring the consistent dry spell typical for this time of year. As residents and visitors bask in the sun-drenched days, the trend of declining rains leading into autumn further highlights the region’s characteristic Mediterranean climate, characterized by its dry summers and mild, wetter winters ahead.
As summer fades into fall, September in Santa Barbara presents a noticeable shift in humidity. With levels at 48%, the month marks a moderate increase from the summer lows of 39% in August, reflecting a gradual return to a more humid climate in the lead-up to autumn. This transition is part of a broader trend observed throughout the year, where humidity peaks during winter months—averaging 78% in January and only dipping as low as 46% in July. Such fluctuations highlight Santa Barbara's unique coastal charm, where the warm, dry summers give way to fresher, more humid conditions as the seasons shift.
As summer gives way to autumn, September in Santa Barbara sees the UV Index shift slightly down to 10, categorizing the exposure as very high. This transition follows a summer peak, where July reached an extreme Index of 12. Visitors and residents alike should remain vigilant, as this month still allows for a burn time of only 15 minutes without protection. Compared to the early months of the year, when the UV Index hovered around moderate levels, September reminds us that even as the days grow shorter, the sun's intensity can still pose risks. Embrace the sun responsibly and check out the detailed insights on the Santa Barbara UV Index to stay informed!
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In Santa Barbara, September wraps up the summer with a remarkable 317 hours of sunshine, making it a delightful month for outdoor activities and exploration. Following the peak summer months of July and August, which boast 383 and 360 hours, respectively, September provides a beautiful transition into fall while still offering ample sunlight. As the days grow shorter, the sunshine hours begin to decline in October and further into the winter months, emphasizing the allure of September’s warm, golden days. This gradual decrease, paired with a backdrop of stunning coastal views and pleasant temperatures, makes September an ideal time to soak in the last rays of summer before the crispness of autumn sets in.
As September rolls in, Santa Barbara basks in the glow of its sunniest month, boasting an impressive 86% chance of sunny weather. This marks a notable increase from the preceding summer months, where the sun graced the skies with 81% in July and 84% in August. The trend highlights a gradual buildup of sunny days from the earlier months of the year, starting at 59% in January and climbing steadily through the spring, before peaking in late summer and early fall. With a backdrop of golden sunshine, September is an ideal time for outdoor enthusiasts and sunseekers to revel in the coastal charm of this beautiful city.
In September, Santa Barbara enjoys a delightful 12 hours of daylight, signaling a gentle transition from the sun-soaked days of summer to the cozier fall months. As the year progresses, daylight initially increases from 10 hours in January and February to a peak of 14 hours in June and July, creating the perfect backdrop for vibrant summer activities. However, with August tapering off slightly to 13 hours, September marks the beginning of a gradual decline in daylight hours, paving the way for the cooler months ahead. This rhythm of daylight not only influences the scenic beauty of the region but also enhances the outdoor lifestyle that Santa Barbara is celebrated for. As the days shorten, the warm hues of autumn will soon grace the coastline, inviting moments of reflection and appreciation for nature’s seasonal shifts.
As summer transitions into fall, September in Santa Barbara brings a gentle breeze, with an average wind speed of 2.2 m/s (5 mph), making it the calmest month of the year. This slight decline in wind compared to the preceding months reflects a broader seasonal trend; the winds gradually ease off from the brisker gusts of the spring, which reached an average of 3.6 m/s (8 mph) in April. While the summer months bear the softest breezes of 2.3 m/s (5 mph) in July and August, September continues this trend of tranquility. As the coast shifts toward autumn, the cooler temperatures may encourage a revitalizing rustle in the leaves, but the overall atmosphere remains serene, offering residents and visitors a perfect backdrop for leisurely strolls along the waterfront.
The weather in Santa Barbara 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 Santa Barbara and find detailed weather information for every month.
September and January exhibit striking contrasts in weather. September tends to be warm with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 36°C (97°F), and it experiences minimal precipitation, averaging just 2 mm (0.1 in) over the month. In contrast, January is much cooler, with temperatures from a low of 3°C (37°F) to a high of 27°C (81°F), and it sees significantly more rainfall, totaling 93 mm (3.7 in) over about six rainy days. Additionally, January has higher humidity levels at 78%, compared to a more comfortable 48% in September. For more detailed insights, check out Santa Barbara weather in January.
The weather in September and February shows a stark contrast in temperature and humidity levels. September boasts a warm average temperature of 21°C (70°F), with maximums reaching a sweltering 36°C (97°F) and minimal precipitation, making it a dry month with only 2 mm of rainfall and low humidity at 48%. In contrast, February is significantly cooler, with an average temperature of 12°C (53°F) and maximums of 25°C (78°F). This month sees substantial rainfall of 81 mm (3.2 in) over six days, accompanied by higher humidity at 82%. For a more detailed look at February’s weather, you can visit Santa Barbara weather in February.
In September, the weather tends to be warm and dry, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 36°C (97°F), along with an average of 21°C (70°F). The month experiences very little precipitation, averaging only 2 mm (0.1 in) over no rainy days, resulting in a humidity level of 48%. In contrast, March brings a cooler climate, with temperatures fluctuating between 3°C (37°F) and 25°C (77°F), and an average of only 12°C (55°F). This month is characterized by significant rainfall, receiving about 88 mm (3.5 in) over 9 days, and higher humidity levels at 75%. For more detailed weather insights, you can check Santa Barbara weather in March.
The weather in September and April showcases notable differences in temperature and humidity. September generally enjoys warmer conditions, with average temperatures reaching 21°C (70°F) and maximums soaring to 36°C (97°F), while April's temperatures average a cooler 15°C (60°F) and peak at 30°C (86°F). Additionally, September is characterized by minimal precipitation, typically registering only 2 mm (0.1 in) across the month, with no rainy days, whereas April experiences higher humidity at 68% and more precipitation at 21 mm (0.8 in) over two rainy days. For more information, you can check Santa Barbara weather in April.
In September, the weather tends to be warmer with average temperatures around 21°C (70°F) and daytime highs soaring up to 36°C (97°F), while the minimum temperature hovers at 9°C (48°F). The month is relatively dry, with a mere 2 mm (0.1 in) of precipitation and no rainy days, contributing to a comfortable humidity level of 48%. In contrast, May experiences cooler temperatures, averaging 16°C (62°F) and peaking at 29°C (85°F), with a minimum of 7°C (45°F). This month brings slightly more moisture, with 12 mm (0.5 in) of precipitation over two days, resulting in higher humidity at 57%. For more details on May weather conditions, check out Santa Barbara weather in May.
When comparing the weather in September and June, September typically shows a wider range of temperatures, with a minimum of 9°C (48°F) and a maximum of 36°C (97°F), averaging around 21°C (70°F). In contrast, June has a slightly narrower temperature range, with a minimum of 10°C (51°F) and a maximum of 33°C (91°F) and an average of 19°C (67°F). Although both months experience low precipitation, September sees no rainy days, while June experiences a bit more, with 4 mm (0.1 in) of rainfall over one day. Additionally, humidity levels are modestly higher in June at 52% compared to September's 48%. For more details, you can check out Santa Barbara weather in June.
In September, the weather features a broader temperature range with a minimum of 9°C (48°F), an average of 21°C (70°F), and a peak of 36°C (97°F), while July tends to be consistently warmer, with a minimum of 14°C (57°F) and a similar maximum of 36°C (97°F). Both months experience minimal precipitation, with only 2 mm (0.1 in) and no rainy days reported in either month. Additionally, September's humidity level is slightly higher at 48% compared to July's 46%, creating a marginally more humid atmosphere. For more details, visit Santa Barbara weather in July.
In September, the weather transitions to slightly cooler temperatures with a minimum of 9°C (48°F) and an average of 21°C (70°F), contrasting with August, which boasts a higher minimum of 14°C (58°F) and an average of 22°C (72°F). While September can reach a maximum of 36°C (97°F), August's peak is more moderate at 33°C (92°F). Both months experience minimal precipitation, with 2 mm (0.1 in) recorded and no rainy days. Notably, September features increased humidity at 48%, compared to August's lower level of 39%. For more details, you can check Santa Barbara weather in August.
September generally boasts warmer temperatures with a minimum of 9°C (48°F) and an average high of 36°C (97°F), contrasted with October's cooler minimum of 7°C (45°F) and average high of 33°C (92°F). While September remains relatively dry with just 2 mm of precipitation, October sees an increase to 10 mm, albeit still without any rainy days. Additionally, October has higher humidity at 59%, compared to September's 48%. For more detailed information, check out Santa Barbara weather in October.
In September, the weather is warm, with temperatures ranging from a low of 9°C (48°F) to a high of 36°C (97°F) and an average of 21°C (70°F), accompanied by minimal precipitation and low humidity at 48%. In contrast, November sees a notable drop in temperature, with a minimum of 3°C (38°F) and a maximum of 28°C (83°F), averaging 15°C (60°F). November also experiences increased humidity at 72% and more precipitation, totaling 23 mm (0.9 in) over one rainy day. For more details on November weather, check out Santa Barbara weather in November.
September typically boasts warmer temperatures, with averages around 21°C (70°F) and maximums reaching as high as 36°C (97°F), making it a comfortable month for outdoor activities. In contrast, December experiences significantly cooler weather, with average temperatures dropping to 12°C (54°F) and maximums around 24°C (75°F). Additionally, September is remarkably dry, with just 2 mm of precipitation across the month, while December sees increased rainfall, averaging 62 mm over six days. Humidity levels also spike in December, rising to 76%, compared to September's 48%. For more details, check out Santa Barbara weather in December.
As summer transitions to fall, September in Santa Barbara offers a delightful escape from the sweltering heat experienced in the preceding months. With an average temperature of a pleasant 21°C (70°F) and minimal rainfall, this month stands out for its dry conditions and clear skies, making it a perfect time for outdoor activities. Unlike the sweltering peak summer days, where temperatures can soar significantly, September provides a more moderate experience, with the chance to enjoy cool evenings. The 49% humidity adds to the comfort level, making it a great month for those looking to relish the beautiful coastal climate. To learn more about Santa Barbara's climate throughout the year, check out Santa Barbara Climate.