Last updated: February 24, 2025
In September, Seaside, United States experiences a delightful transition as summer wanes. The maximum temperature reaches a pleasant 24°C (75°F), while the average hovers around a mild 15°C (59°F), making it an ideal time for outdoor activities. Nights can get a bit cooler, with a minimum temperature of 10°C (50°F). While the month brings approximately 91 mm (3.6 inches) of rain over 10 days, the humidity level remains at a comfortable 71%, contributing to the refreshing coastal atmosphere. This unique blend of conditions makes September a captivating time to enjoy the natural beauty and vibrant culture of Seaside.
In September, Seaside, United States, experiences a delightful transition as summer gives way to autumn. The temperatures, with a minimum of 10°C (50°F) and a comfortable average of 15°C (59°F), create an inviting atmosphere for outdoor activities. As the month progresses, the maximum temperature hovers around 24°C (75°F), allowing for warm, sunny days that are perfect for beach outings and coastal explorations. This slight decline from the peak summer warmth signals the approaching cooler months, yet September’s pleasant climate still offers plenty of opportunities to relish the beauty of Seaside before the crisp autumn air fully sets in.
As September rolls into Seaside, United States, the weather reflects the transition from summer to autumn, with precipitation totaling 91 mm (3.6 in) over 10 days. This amount represents a slight increase from the dryer summer months of July and August, which recorded just 20 mm (0.8 in) each, signaling the approach of wetter fall weather. Interestingly, September’s rainfall bridges a significant gap between the arid summer and the much wetter months that follow, like October with its 166 mm (6.5 in) and November, which soars to 258 mm (10.2 in). This trend not only underscores the seasonal shift but also highlights the growing role of autumn in Seaside's precipitation pattern, where the coming months promise revitalizing rains after the sun-soaked summer.
In Seaside, United States, September marks a notable shift in humidity levels, with the average dipping to 71%—the lowest of the year. This decrease follows the summer months, where humidity gradually fell from 82% in July to 74% in August, indicating a seasonal transition towards drier conditions. Interestingly, this trend of declining humidity continues into October, where it rises again to 81%, suggesting that autumn brings some fluctuation before the winter months. Overall, these patterns illustrate how the coastal climate can shift dramatically, with September serving as a pivotal point that signals the impending return of the wetter, chillier months ahead.
As summer fades and September arrives in Seaside, the UV Index takes a slight dip to 7, designating it as a high exposure category. This means that while sun protection remains important, you have a bit more time under the sun compared to the peak summer months, with a burn time of approximately 25 minutes. Interestingly, this shift aligns with the gradual decrease in UV levels observed throughout the season; May through August showcased very high indices between 8 to 10, emphasizing the need for vigilance. As we transition into the cooler months, the UV Index will continue to decline, but for now, enjoy the early fall sun while staying protected—discover more about the UV Index trends at Seaside UV Index.
UV Risk Categories
As summer transitions to fall, September in Seaside, United States, continues to bask in generous sunlight, offering residents and visitors an impressive 263 hours of sunshine. This marks a gentle decline from the sun-drenched peak of July, which boasts 358 hours, yet still provides a vibrant escape from the encroaching chill of autumn. The month’s sun-soaked days create the perfect backdrop for beach strolls and outdoor gatherings, echoing the warmth of May's 289 hours while gradually easing into the softer light of October's 207 hours. As the days shorten, September remains a golden opportunity to relish the lingering warmth of summer before the curtains of winter are drawn.
In Seaside, United States, September showcases a notable uptick in sunny weather, boasting a 38% chance of sunshine. This marks a distinct improvement from the cooler months earlier in the year, where January and February languish at only 18% and 17%, respectively. The trend of increasing sunshine continues through the spring, peaking in April at 43%, before witnessing a dip during the peak summer months of July and August. Interestingly, September is positioned as a transition month, holding onto summer's warmth with a favorable chance of sun that makes it an inviting time for outdoor activities. As autumn approaches, the likelihood of sunny days decreases, but September offers a delightful respite with significantly elevated sunshine compared to the colder months that follow.
As summer gives way to autumn, September in Seaside, United States, offers a gentle transition marked by approximately 12 hours of daylight. This reduction from the sun-drenched 15 hours of June and July reflects the gradual decrease in sun exposure as the days shorten. Following the 14 hours in August, September retains enough light to enjoy the lingering warmth while signaling a shift towards cooler days ahead. The steady decline in daylight hours, transitioning from longer days in spring and summer to shorter ones by October, creates a rhythm of seasonal change that invites both reflection and appreciation for the beauty of the shifting seasons.
As summer fades and autumn approaches, September in Seaside, United States, offers a gentle breeze with an average wind speed of 4.4 m/s (10 mph). This slight uptick from the tranquil summer months marks a transition, as the winds begin to pick up their pace. Notably, September's winds are a welcome reprieve compared to August's calm conditions, providing just enough energy to rustle the leaves and create a refreshing atmosphere for outdoor enthusiasts. Looking ahead, the wind speeds are expected to rise again in October and November, suggesting that the coastal landscape will soon be invigorated with the characteristic gusts of fall. This seasonal shift invites locals and visitors alike to embrace the beauty of nature’s rhythm.
The weather in Seaside 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 Seaside and find detailed weather information for every month.
September and January exhibit notable differences in weather patterns. In September, temperatures range from a cool 10°C (50°F) to a pleasant 24°C (75°F), with an average of 15°C (59°F). The month sees moderate rainfall of 91 mm (3.6 in) over about 10 days and a humidity level of 71%, offering a mild and relatively dry transition into fall.
In contrast, January experiences much colder conditions, with temperatures dropping to a minimum of 0°C (32°F) and peaking at a maximum of only 13°C (56°F), averaging around 8°C (46°F). This month is significantly wetter, with precipitation totaling 252 mm (9.9 in) over approximately 18 days and a higher humidity level of 85%, making it a much more damp and chilly time of the year. For more detailed insights, you can check out Seaside weather in January.
In comparing the weather between September and February, significant differences emerge. September typically boasts milder temperatures, with averages around 15°C (59°F) and maximums reaching 24°C (75°F), while February's temperatures are notably cooler, averaging just 7°C (44°F) and peaking at 13°C (55°F). February also sees higher precipitation, with 224 mm (8.8 in) over 20 days compared to September's 91 mm (3.6 in) across 10 days, contributing to its increased humidity of 84% versus September's 71%. For a more detailed look at February conditions, you can check Seaside weather in February.
September and March reflect contrasting weather patterns. September typically enjoys milder temperatures, with a minimum of 10°C (50°F) and an average of 15°C (59°F), peaking at 24°C (75°F). In contrast, March starts cooler, with a minimum of just 1°C (34°F) and an average of 8°C (46°F), reaching a maximum of 18°C (65°F). Additionally, March experiences significantly more precipitation, totaling 182 mm (7.2 in) over approximately 18 days, compared to September's 91 mm (3.6 in) across 10 days. The humidity in March is also higher at 85%, compared to September's 71%. For those interested in more detailed weather conditions during March, you can check Seaside weather in March.
September and April offer distinct weather experiences, reflecting the transition from summer to autumn and from winter to spring, respectively. In September, temperatures gradually decrease, with a minimum of 10°C (50°F) and a comfortable maximum of 24°C (75°F), while experiencing relatively moderate precipitation of 91 mm (3.6 in) over about 10 days, accompanied by a humidity level of 71%. In contrast, April presents cooler temperatures, with a minimum of just 2°C (36°F) and an average of 9°C (49°F), peaking at 20°C (67°F). However, it sees higher overall precipitation at 145 mm (5.7 in) across 17 days and increased humidity at 83%, mirroring the season's characteristic unpredictability. For further insights into April's specific conditions, check out Seaside weather in April.
When comparing the weather in September and May, September tends to be warmer with average temperatures around 15°C (59°F) and a maximum of 24°C (75°F), while May has cooler averages at 12°C (53°F) and a maximum of 21°C (70°F). However, May experiences slightly higher humidity levels at 83% compared to September's 71%. Precipitation in September is greater, with 91 mm (3.6 in) over 10 days, contrasted with May's 72 mm (2.8 in) spread over 12 days. For more detailed insights into the weather during this month, you can check out Seaside weather in May.
September generally offers slightly warmer temperatures compared to June, with average highs reaching 24°C (75°F) compared to June's 25°C (77°F). However, June experiences slightly lower average temperatures, with a minimum of 10°C (49°F) and an average of 14°C (57°F), whereas September's averages range from a minimum of 10°C (50°F) to an average of 15°C (59°F). Precipitation levels are higher in September, with 91 mm (3.6 in) over about 10 days, while June sees less rainfall at 63 mm (2.5 in) across 9 days. Additionally, June's humidity is higher at 83%, compared to September's 71%. For more details, check out Seaside weather in June.
When comparing the weather in September to that in July, we see distinct differences. September enjoys slightly warmer temperatures, with maximums reaching up to 24°C (75°F), while July's highs are a bit lower at 21°C (70°F). Both months have similar average temperatures around 15°C (59°F). However, September tends to be wetter, with 91 mm (3.6 in) of precipitation spread over 10 days compared to July's lighter rainfall of just 20 mm (0.8 in) over 4 days. Additionally, humidity levels are lower in September at 71%, contrasting with July's higher humidity of 82%. For those looking to explore seaside conditions, you might find more stable weather in July—check out Seaside weather in July.
In comparing the weather between September and August, we see a slight cooling trend. September brings a minimum temperature of 10°C (50°F) and an average of 15°C (59°F), which is a decrease from August's minimum of 11°C (53°F) and average of 16°C (60°F). Both months have similar maximum temperatures, reaching 24°C (75°F) in September and 24°C (76°F) in August. However, September is markedly wetter, with 91 mm (3.6 in) of precipitation over 10 days compared to just 20 mm (0.8 in) over 5 days in August. Humidity levels are also slightly lower in September at 71% versus 74% in August, contributing to a fresher feel as summer transitions into autumn. For those wanting to know more about August weather by the coast, check out Seaside weather in August.
In September, the weather features a milder climate with an average temperature of 15°C (59°F) and a maximum of 24°C (75°F), ideal for outdoor activities. However, the month also brings about 91 mm (3.6 in) of precipitation over roughly 10 days, contributing to a humidity level of 71%. In contrast, October sees a noticeable drop in temperatures, with averages around 12°C (54°F) and a maximum of 20°C (67°F). Furthermore, October experiences increased rainfall, totaling 166 mm (6.5 in) across 14 days, resulting in higher humidity at 81%. For a more detailed look at what to expect, check out Seaside weather in October.
September weather is generally milder, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 24°C (75°F), and an average temperature of 15°C (59°F). In contrast, November sees much cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 15°C (59°F), resulting in an average of just 10°C (50°F). Additionally, September experiences less rainfall, with 91 mm (3.6 in) over about 10 days, while November is significantly wetter, accumulating 258 mm (10.2 in) across 18 days. The humidity also rises from 71% in September to 87% in November, making the latter month feel considerably more damp. For more details on the weather during this time, check out Seaside weather in November.
In September, the weather is generally mild, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 24°C (75°F) and an average of 15°C (59°F). It experiences 91 mm (3.6 in) of precipitation over about 10 days, coupled with a humidity level of 71%. In contrast, December is significantly colder, with temperatures dropping to a minimum of -2°C (30°F) and averaging 8°C (46°F), reaching a maximum of only 13°C (56°F). This month sees increased precipitation of 272 mm (10.7 in) spread over 22 days, alongside a higher humidity level of 87%. For a closer look at the seaside conditions in December, check out Seaside weather in December.
As summer gives way to autumn, September in Seaside breathes a different kind of charm, marked by milder temperatures and a refreshing seaside atmosphere. With maximums around 24°C, it’s a pleasant transition, but average conditions at 15°C remind visitors that cooler weather is on the horizon. The increased chance of rain, with approximately 10 days of drizzle contributing to a total of 91 mm, enriches the coastal landscape, enhancing the vibrant hues of nature. However, the humidity remains relatively high at 71%, adding a slight warmth to the cooler breezes. For more detailed insights into the nuances of this coastal haven's climate throughout the year, check out Seaside Climate.