Last updated: February 24, 2025
September in Long Beach, United States, offers a mild climate perfect for enjoying the coastal scenery. With a maximum temperature reaching 24°C (75°F) and an average of 15°C (60°F), the days are pleasantly warm, while nighttime lows dip to a comfortable 10°C (51°F). Although this month brings 84 mm (3.3 in) of rainfall over 10 days, the humidity levels at 74% create a refreshing environment that enhances the seaside experience. Whether you're exploring the vibrant community or relaxing on the beach, September's weather offers a delightful mix of sunshine and occasional showers.
As summer gives way to fall in Long Beach, September greets visitors with delightful temperatures that reflect the season's transition. With nighttime lows around 10°C (51°F) and daytime highs peaking at 24°C (75°F), this month boasts an average temperature of 15°C (60°F), making it pleasantly warm yet comfortable. The progression from the warmer summer months, where temperatures recently soared to 24°C (75°F) in August, hints at a gradual cooling trend as autumn approaches. Visitors can expect mild days perfect for beach strolls or outdoor adventures without the intense heat of midsummer. The shift in climate serves as an invitation to savor the last vestiges of summer warmth before the coolness of October settles in.
September in Long Beach ushers in a slight uptick in precipitation, accumulating 84 mm (3.3 in) over approximately 10 days. This marks a noticeable increase compared to the drier summer months, where July and August posted minimal rainfall of just 19 mm (0.8 in) and 20 mm (0.8 in), respectively. As summer transitions to fall, the city's average precipitation climbs, contrasting sharply with the typically parched conditions of the preceding months. With October looming, which often delivers 156 mm (6.1 in) across 14 days, September serves as a precursor to the wetter season, evidencing an encouraging shift in the weather patterns of Long Beach.
In September, Long Beach experiences a noticeable dip in humidity, dropping to 74%, which marks one of the lowest levels of the year. This decline follows a trend of decreasing humidity from the peak of 86% in January to 73% in August. As summer transitions to fall, the more comfortable levels in September signal a shift, offering respite from the humid heat experienced earlier in the year. This seasonal change hints at a return to higher humidity in the subsequent months, with October climbing back to 83%, creating a rhythm that Long Beach residents have come to expect as the year progresses.
As summer transitions into fall, September in Long Beach presents a UV Index of 7, indicating a high exposure category and a burn time of 25 minutes. This slight drop from the peak summer values of 9 in July and August reflects a gradual easing of sun intensity, yet caution is still advised for outdoor activities. The trend shows that while UV levels remain elevated, they are beginning to moderate as the cooler months approach. It’s crucial for residents and visitors to remain vigilant about sun protection, especially as the sun's rays can still be quite strong. For more details, check out the comprehensive guide here: Long Beach UV Index.
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As summer gently fades into autumn, September in Long Beach remains a vibrant transition, boasting an impressive 262 hours of sunshine. This month stands out as it follows the sun-drenched July and August, which each basked in over 350 hours of golden rays. Although September marks a noticeable drop from those peak summer months, it still delivers more daylight than many other times of the year. With a gradual decline in sunshine leading into the cooler months, including October's 205 hours, September serves as a delightful bridge, encouraging outdoor activities and a last taste of summer warmth before fall takes over. Overall, the sun-soaked trends of Long Beach highlight its allure as a year-round destination for sunshine seekers.
In Long Beach, United States, September presents a notable uptick in the likelihood of sunny weather, with a 37% chance of sunshine, making it one of the more favorable months for outdoor activities. This marks a significant increase compared to the earlier summer months, such as July and August, which see 26% and 30% chances, respectively. As the summer gradually fades, September serves as a transitional period where the overall weather begins to shift; while the chances don’t peak as high as the spring months, the moderate sun exposure offers a pleasant reprieve from the cooler, cloudier days of fall approaching in October, which dips to 29%. Overall, September stands out as a prime opportunity to enjoy the remaining warmth of the season in Long Beach.
As summer fades into fall, September in Long Beach sees a noticeable drop in daylight hours, averaging 12 hours compared to the peak summer months of June and July, which bask in a luxurious 15 hours of light. This gradual transition reflects a natural ebb and flow of daylight throughout the year, starting with a modest 9 hours in January and reaching a high in May and June. As we move closer to October, daylight gradually decreases, following an established pattern of declining brightness after the vibrant summer days. This rhythmic cycle not only marks the changing seasons but also invites a sense of renewal and anticipation for the cozy autumnal months ahead.
As September unfolds in Long Beach, the wind adopts a gentle demeanor with an average speed of 4.5 m/s (10 mph), aligning with the calmer breezes of the summer months. This modest wind velocity continues the trend of decreasing speeds from the peak summer months, where the winds were inspired by the warmer season, averaging 4.3 m/s (10 mph) in August. However, as the year progresses, winds start to pick up again in October with an increase to 5.8 m/s (13 mph), hinting at a shift towards the brisker conditions typical of fall. Overall, September serves as a transitional phase, where the tranquil winds signal a mellow end to summer before winter’s gusty embrace begins to emerge.
The weather in Long Beach 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 Long Beach and find detailed weather information for every month.
When comparing the weather between September and January, significant differences in temperature and precipitation stand out. September sees milder conditions with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), while January is much cooler, with average temperatures between 0°C (32°F) and 13°C (56°F). In terms of precipitation, January is notably wetter, receiving 242 mm (9.5 in) over 18 days compared to September's 84 mm (3.3 in) over 10 days. Additionally, January’s higher humidity of 86% contributes to a chillier atmosphere compared to September's 74%. For more detailed information about January weather, you can visit Long Beach weather in January.
In September, temperatures in Long Beach range from a minimum of 10°C (51°F) to a pleasant maximum of 24°C (75°F), with an average of 15°C (60°F). Precipitation is moderate, totaling 84 mm (3.3 in) over about 10 days, accompanied by a relatively comfortable humidity level of 74%. In contrast, February sees cooler temperatures, with a minimum of 0°C (33°F) and a maximum of 13°C (55°F), averaging just 7°C (45°F). This month experiences significantly higher precipitation, with 193 mm (7.6 in) over 19 days and increased humidity at 84%. For more details on February weather, you can visit Long Beach weather in February.
In comparing the weather of September and March, we notice distinct differences. September enjoys milder temperatures with a minimum of 10°C (51°F), an average of 15°C (60°F), and a maximum reaching 24°C (75°F). In contrast, March is cooler, with temperatures ranging from a minimum of 2°C (35°F) to an average of 8°C (47°F), and a maximum of 17°C (64°F). Additionally, September receives less precipitation at 84 mm (3.3 in) over about 10 days, whereas March experiences significantly more rain, totaling 161 mm (6.3 in) spread over 17 days. Humidity levels are also higher in March at 85%, compared to 74% in September. For a detailed look at March weather, you can visit Long Beach weather in March.
Comparing the weather in September and April reveals notable differences in temperature and precipitation. September tends to be warmer, with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), while April is cooler, with temperatures ranging from 3°C (38°F) to 19°C (67°F). Additionally, September experiences less rainfall, averaging 84 mm (3.3 in) over about 10 days, compared to April's 132 mm (5.2 in) which occurs over 16 days. The humidity is slightly lower in September at 74%, while April is more humid at 83%. For more details on April weather patterns, you can visit Long Beach weather in April.
When comparing the weather in September and May, September tends to be warmer, with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), while May experiences slightly cooler conditions, averaging from a minimum of 7°C (45°F) to a maximum of 21°C (69°F). Precipitation levels are somewhat higher in September, totaling 84 mm (3.3 in) over about 10 days, compared to May's 66 mm (2.6 in) across 11 days. Additionally, May has a higher average humidity of 84%, compared to September's 74%. For more specific information, check out Long Beach weather in May.
In comparing the weather of September and June, we observe that both months have similar temperature ranges, with September's minimum and maximum temperatures closely mirroring June's. September averages around 15°C (60°F) with a maximum of 24°C (75°F), whereas June has an average of 14°C (58°F) and a slight edge in maximum temperature at 25°C (77°F). Precipitation is higher in September, totaling 84 mm (3.3 in) over 10 days compared to June's 58 mm (2.3 in) over 8 days. Interestingly, humidity levels are higher in June at 84%, compared to September's 74%. For a more detailed look at June weather, check out Long Beach weather in June.
When comparing the weather in September and July, it's evident that September tends to be slightly warmer overall, with maximum temperatures reaching 24°C (75°F) compared to July's 21°C (69°F). However, July has a higher minimum temperature of 12°C (54°F) versus September’s 10°C (51°F), making July feel a bit milder during the nights. Additionally, September experiences significantly more precipitation, accumulating 84 mm (3.3 in) over 10 days, while July has only 19 mm (0.8 in) over just 4 days. The humidity is also quite high in both months, with September at 74% and July at 82%, creating a generally humid atmosphere during the summer. For more details on July weather, visit Long Beach weather in July.
In comparing the weather between August and September, notable differences emerge. September features slightly cooler temperatures, with a minimum of 10°C (51°F) and an average of 15°C (60°F), compared to August's minimum of 12°C (54°F) and average of 16°C (61°F). Both months experience a maximum temperature of 24°C (75°F), suggesting a consistent warmth at the higher end. However, September is significantly wetter, recording 84 mm (3.3 in) of precipitation over 10 days, compared to just 20 mm (0.8 in) over 5 days in August. Humidity levels remain similar, with September's humidity at 74% and August at 73%. For a detailed look at weather specifics in August, you can check Long Beach weather in August.
September and October present a noticeable shift in weather patterns. In September, temperatures range from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), with an average of 15°C (60°F). This month sees relatively moderate precipitation of 84 mm (3.3 in) over about 10 days, with humidity levels at 74%. In contrast, October's temperatures drop slightly, with a minimum of 6°C (43°F) and a maximum of 19°C (66°F), yielding an average of 13°C (55°F). Correspondingly, October experiences a significant increase in precipitation, totaling 156 mm (6.1 in) over 14 days, along with higher humidity at 83%. For more detailed information, you can visit Long Beach weather in October.
September and November present notable contrasts in weather conditions. In September, temperatures range from a pleasant minimum of 10°C (51°F) to a maximum of 24°C (75°F), with an average of 15°C (60°F). Precipitation is relatively light at 84 mm (3.3 in) over about 10 days, coupled with a humidity level of 74%. In contrast, November sees a significant drop in temperature, with a minimum of 4°C (39°F) and an average of just 10°C (51°F). Additionally, November experiences much heavier rainfall at 249 mm (9.8 in) spread across 18 days and a higher humidity of 86%. This shift marks the transition into the colder and wetter months. For a more detailed overview, check out Long Beach weather in November.
In September, the weather is generally milder, with average temperatures ranging from 10°C (51°F) to a pleasant maximum of 24°C (75°F). The humidity sits at a comfortable 74%, and while there is some precipitation, with about 84 mm (3.3 in) over approximately 10 days, it tends to be more manageable. In contrast, December experiences a significant drop in temperatures, with lows of -1°C (30°F) and an average of only 8°C (47°F). The month also sees increased precipitation, totaling 248 mm (9.8 in) spread over 21 days, accompanied by higher humidity at 87%. For a detailed look at December weather, you can visit Long Beach weather in December.
As summer fades into autumn, September in Long Beach brings a refreshing transition marked by milder temperatures and a noticeable increase in precipitation. While the mercury hovers comfortably around a pleasant average of 15°C, the warmth is often accompanied by occasional rain, creating a unique blend of mild days and damp nights. This month typically experiences a higher humidity level compared to the preceding summer months, offering a crispness to the ocean air that's invigorating for both residents and visitors alike. As you prepare for your September adventures, be sure to check out detailed weather patterns at Long Beach Climate to make the most of your stay!