Last updated: February 24, 2025
September in Long Beach, United States, offers a delightful mix of warm temperatures and refreshing coastal breezes. The month sees a maximum temperature reaching 31°C (87°F), while the average hovers around 21°C (71°F), providing an ideal backdrop for outdoor activities. However, the weather is not without its quirks, as 10 days of precipitation contribute to a total rainfall of 97 mm (3.8 in), creating a humid atmosphere with an average humidity level of 68%. This combination of warmth and moisture enhances the region's vibrant landscapes, making September a unique time to experience Long Beach.
As summer transitions to fall, September in Long Beach showcases pleasant temperatures that embody the best of late summer. With minimums around 11°C (52°F) and averages reaching 21°C (71°F), the days remain comfortably warm. The maximum temperatures can climb to 31°C (87°F), offering ample opportunities to enjoy the scenic coastline. This month stands out as a bridge, gradually cooling down from August's heat while still inviting beachgoers and outdoor enthusiasts to soak up the sun before autumn sets in. Overall, September's climate reflects a perfect balance of warmth and refreshment, making it an ideal time for outdoor activities and relaxation by the sea.
In September, Long Beach experiences a notable transition in its weather patterns, with precipitation totaling 97 mm (3.8 in) over 10 days. This amount reflects a slight decrease from the summer months, yet remains substantial compared to the spring's drier spells. It appears that the city bids farewell to the more intense summer rains typical of July and August, while still welcoming the initial hints of autumn's moisture. The trends indicate a gradual shift, as October follows with increased rainfall to 144 mm (5.7 in), suggesting that September acts as a bridge between the arid heat of summer and the wetter months ahead.
In September, Long Beach experiences a modest increase in humidity, averaging around 68%. This marks a subtle rise from the summer months, where humidity levels dipped to their lowest in July at 62% and climbed slightly to 65% in August. The trend clearly indicates a transition from the dry warmth of summer toward the more humid fall months, reflecting a seasonal shift that prepares residents for the wetter months ahead. As the year progresses, humidity levels consistently rebound, peaking in the winter months, underscoring Long Beach's characteristic climate rhythm.
As September rolls into Long Beach, the UV Index remains elevated at 8, categorizing the exposure as very high with a burn time of just 15 minutes. This marks a slight decrease from the peak summer months of June through August, where the Index consistently hit 10. Despite this reduction, it's crucial for residents and visitors alike to remain vigilant about sun protection, as the September sun can still pose significant risks. The trend throughout the year shows a gradual rise from a moderate index in January to the intense levels of summer, followed by a gentle decline into autumn. For more information on the UV Index and how to stay safe during sun exposure, visit Long Beach UV Index.
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As summer gracefully transitions into fall, September shines brightly in Long Beach, offering about 284 hours of glorious sunshine. This month, while slightly less sun-soaked than the sun-drenched peak of July and August, still boasts a robust amount of daylight. The trend showcases a gradual decline in sunshine from the blazing heights of more than 350 hours in mid-summer, yet September remains vibrant, allowing residents and visitors alike to bask in the warmth of the California sun. As the days begin to shorten, the pleasant climate sets the perfect backdrop for outdoor activities and beach outings, keeping the spirit of summer alive just a little longer.
In Long Beach, the prospect of sunny weather in September stands at a favorable 47%, offering a delightful transition from the summer heat. While early summer months like July and August show lower chances of sunshine, September marks a slight rebound, suggesting an appealing blend of warmth without the oppressive heat. This trend indicates that as summer wanes, residents and visitors can still bask in the pleasant rays of sunshine before the onset of cooler fall temperatures. With an uptick in sunny days compared to the preceding months, September provides a perfect opportunity to enjoy outdoor activities in this beautiful coastal city.
As summer transitions into fall, September in Long Beach, United States, greets residents with a delightful 12 hours of daylight. This marks a gradual decline from the sun-soaked days of June, which boast up to 15 hours of light, and reflects the return to shorter days as autumn approaches. Following a peak in daylight during the warmer months, daylight hours begin to taper off in September, shedding light on a clear trend: as the year progresses, the days gradually shorten, paving the way for the cooler months ahead. With September's moderate daylight, locals can still enjoy ample time outdoors before the daylight dips further in October.
As the summer winds down, September in Long Beach ushers in a gentle revival of breezy days, with an average wind speed of 4.6 m/s (10 mph). This marks a subtle increase from the calmer months of July and August, where the winds slowed to a tranquil 3.8 m/s (8 mph), creating an ideal atmosphere for leisurely beach outings. The transition into fall shows a promising uptick, hinting at a breath of fresh air ahead. While still lower than the early months of the year, September’s winds serve as a reminder of nature's rhythmic ebb and flow, preparing the region for the gustier months to come. As autumn approaches, one can anticipate a gradual rise, with winds returning at 5.0 m/s (11 mph) in October, inviting adventure and exploration along the scenic coastline.
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.
In September, the weather is generally warm, with average temperatures around 21°C (71°F) and a peak of 31°C (87°F), while experiencing relatively lower humidity at 68%. This month sees about 97 mm (3.8 in) of precipitation spread over approximately 10 days. In stark contrast, January is much colder, with average temperatures plummeting to just 2°C (36°F) and lows reaching a chilly -14°C (6°F). Despite slightly less rainfall at 80 mm (3.2 in) over about 9 days, January's higher humidity level of 84% contributes to a distinctly colder feeling. For more insights into the winter conditions, check out Long Beach weather in January.
September and February present stark contrasts in weather. In September, temperatures range from a mild 11°C (52°F) at night to a warm average of 21°C (71°F), peaking at 31°C (87°F) during the day, with a total rainfall of 97 mm (3.8 in) over about 10 days. The humidity is moderately high at 68%, contributing to a comfortable yet warm feel. In contrast, February is much colder, with temperatures dipping to a minimum of -14°C (7°F) and averaging only around 3°C (38°F), while peaking at 17°C (64°F). This month also sees more significant precipitation, totaling 127 mm (5.0 in) over 12 days, along with higher humidity at 82%, which can make the frigid air feel even colder. For more details on the winter conditions, check out Long Beach weather in February.
September and March present distinctly different weather patterns. In September, temperatures range from a mild 11°C (52°F) at night to a warm 31°C (87°F) during the day, making it a pleasant month with an average of 21°C (71°F). The precipitation is moderately high at 97 mm (3.8 in) over about 10 days, with humidity around 68%.
In contrast, March experiences cooler temperatures, with nighttime lows plummeting to -8°C (18°F) and daytime highs reaching only up to 22°C (72°F). Although the average temperature is a chilly 5°C (42°F), the month has a bit more precipitation at 106 mm (4.2 in) over the same duration of 10 days, and the humidity is higher at 81%.
For a more detailed look at the weather in March, you can refer to Long Beach weather in March.
In comparing the weather of September and April, notable differences emerge in temperature and precipitation patterns. September tends to be warmer with average temperatures ranging from a chilly 11°C (52°F) to a hot 31°C (87°F), while April experiences cooler temperatures, ranging from a minimum of 0°C (32°F) to a maximum of 25°C (77°F). However, April sees slightly higher precipitation, totaling 126 mm (5.0 in) over 12 days, compared to September's 97 mm (3.8 in) across 10 days. Additionally, April has higher humidity levels at 78%, contrasting with September's 68%. For more detailed insights into April's weather, check out Long Beach weather in April.
September and May present distinct weather patterns, with September generally warmer and more humid. In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 31°C (87°F), averaging around 21°C (71°F). The month sees around 97 mm (3.8 in) of rainfall over approximately 10 days, with humidity levels at 68%. In contrast, May experiences cooler temperatures, with a minimum of 2°C (37°F), an average of 15°C (59°F), and a maximum of 28°C (83°F). Rainfall is slightly higher at 126 mm (5.0 in) over about 13 days, while humidity is comparable at 69%. For a more detailed look at May's weather patterns, you can visit Long Beach weather in May.
In comparing the weather between September and June, we see that both months share similar minimum temperatures, averaging around 11°C (51-52°F) and peak at 30-31°C (86-87°F). The average temperature is also quite consistent, with September reaching an average of 21°C (71°F) compared to June's 21°C (69°F). However, September tends to be slightly wetter, featuring 97 mm of precipitation over about 10 days, whereas June has 86 mm over 12 days. Humidity levels are similar, with September at 68% and June at 69%, creating a comfortable yet moist atmosphere. For a more detailed look at June conditions, visit Long Beach weather in June.
In comparing the weather between September and July, September offers a much wider range of temperatures, with minimums dropping to 11°C (52°F) and maximums reaching up to 31°C (87°F), resulting in a more moderate average temperature of 21°C (71°F). In contrast, July boasts warmer conditions overall, with minimum temperatures of 17°C (63°F) and maximums climbing to 34°C (94°F), leading to an average temperature of 25°C (77°F). Additionally, September experiences slightly more precipitation, totaling 97 mm (3.8 in) over about 10 days, while July sees heavier rainfall at 127 mm (5.0 in) across 11 days. Despite the higher humidity in September at 68%, July maintains a drier feel at 62%. For more detailed insights on July weather, you can refer to Long Beach weather in July.
In comparing the weather between August and September, we notice a shift in temperatures and precipitation patterns. September sees a drop in the minimum temperature to 11°C (52°F) compared to August's milder 17°C (63°F), while the average temperatures are also lower, with September averaging 21°C (71°F) versus August's 24°C (76°F). Although both months experience warm maximum temperatures, September's peak may reach up to 31°C (87°F), slightly lower than August's 32°C (90°F). Rainfall is more frequent in September, totaling 97 mm (3.8 in) over 10 days, compared to August's 116 mm (4.6 in) over 12 days. Furthermore, September's humidity is slightly higher at 68%, contrasting with August's 65%. For a more detailed look at the weather during August, you can visit Long Beach weather in August.
September and October present a noticeable shift in weather patterns. September enjoys warmer temperatures, with a minimum of 11°C (52°F) and an average of 21°C (71°F), peaking at a maximum of 31°C (87°F). In contrast, October's temperatures drop, with a minimum of 5°C (41°F) and an average of 16°C (62°F), although it matches September's maximum with 31°C (88°F). Precipitation also increases in October, with 144 mm (5.7 in) expected over 12 days compared to September's 97 mm (3.8 in) over 10 days. Additionally, October experiences slightly higher humidity levels at 74%, compared to 68% in September. For more detailed information, check out Long Beach weather in October.
In September, the weather is generally warm with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 31°C (87°F), averaging around 21°C (71°F). Rainfall is moderate, with 97 mm (3.8 in) of precipitation spread over about 10 days, and humidity levels hover around 68%. In contrast, November brings a significant drop in temperatures, with a minimum of -7°C (20°F) and an average of 9°C (49°F), peaking at 22°C (71°F). Precipitation slightly increases to 101 mm (4.0 in) over the same number of rainy days, but humidity rises to 82%, creating a much colder and damp atmosphere. For more detailed insights, you can check out the weather specifics here: Long Beach weather in November.
In comparing the weather between September and December, a distinct transformation occurs. September typically enjoys milder temperatures, with averages around 21°C (71°F) and highs reaching up to 31°C (87°F), while December experiences a significant drop, averaging just 5°C (41°F) and peaking at 17°C (63°F). Precipitation increases slightly from September to December, rising from 97 mm (3.8 in) to 133 mm (5.2 in), despite both months receiving rainfall on about 10 days. Additionally, December's humidity rises to 80%, compared to September's more comfortable 68%. For a detailed look at December weather, you can check out Long Beach weather in December.
As summer gives way to autumn, September's weather in Long Beach presents a charming transition, marked by pleasant warmth and increased humidity. With average temperatures hovering comfortably around 21°C (71°F) and maximums reaching up to 31°C (87°F), this month offers ideal conditions for outdoor activities. However, be prepared for some rain, as September experiences about ten days of precipitation, adding to the month’s lively atmosphere. This blend of warmth and occasional showers sets September apart from the drier, more stable conditions of summer and the cooler, more unpredictable fall months ahead. For a deeper insight into the year-round climate of Long Beach, visit Long Beach Climate.