Last updated: February 24, 2025
September in Newport Beach, United States offers a delightful climate for outdoor activities, with maximum temperatures reaching a warm 30°C (86°F) and an average of 20°C (69°F). The evenings bring a refreshing coolness, as the minimum temperature dips to 17°C (62°F). With a remarkably low precipitation of just 3 mm (0.1 in) over the month and absolutely no rain days, it’s the perfect time to enjoy the sun-kissed beaches. The air carries a comfortable humidity level of 68%, making this coastal city an ideal destination for late summer adventures.
In September, Newport Beach enjoys a delightful transition into early fall, with temperatures showcasing a pleasant warm-up. The minimum temperature hovers at 17°C (62°F), while the average settles comfortably at 20°C (69°F). As the month progresses, residents and visitors bask in maximum temperatures that can reach up to 30°C (86°F), making it one of the warmer months of the year. This trend reflects a gradual rise from the summer's peak, allowing for plenty of sunshine and beach activities. Compared to the previous months, September presents a harmonious blend of warmth and mildness, perfect for enjoying the vibrant coastal lifestyle Newport Beach has to offer.
In Newport Beach, September marks a transition into drier conditions, with precipitation levels dropping to a mere 3 mm (0.1 in) and experiencing no recorded rainy days. This month typically showcases a shift from summer's arid atmosphere, where July and August receive almost negligible rainfall, to the onset of the autumn season, allowing residents and visitors to relish in the sun-soaked days. While the early months of the year experience more substantial precipitation, averaging around 57 mm in January, September's weather hints at a gradual shift, leading into the more temperate October, which averages 8 mm of rain. This pattern underscores Newport Beach’s distinctive seasonal rhythm, where dry summers give way to refreshing fall rains.
As summer bids farewell, September in Newport Beach experiences a slight dip in humidity, averaging 68%—the lowest mark for the year. This gradual decline continues the trend observed since August’s humidity of 69%, signaling the transition into the cooler months. The humidity levels show a consistent pattern from spring through late summer, ranging between 70% and 79%, but this shift in September paves the way for the crispness of autumn. Following this peak around February at 79%, the weather gradually becomes drier, making September a refreshing time for locals and visitors alike to enjoy the beach and outdoor activities without the intense moisture of earlier months.
As September rolls into Newport Beach, the UV Index remains high at 10, indicating very high exposure levels that warrant careful sun protection. This month mirrors the UV intensity of the summer's peak, specifically July and June, when a UV Index of 11 classified the conditions as extreme. The trend clearly showcases a gradual increase in UV levels from the moderate exposure of January, peaking in the summer months, and tapering off towards autumn. With a burn time of just 15 minutes, visitors and residents alike should prioritize safety, making the most of sun protection measures during these lingering warm days. For more insights on UV levels throughout the year, check out the Newport Beach UV Index.
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As summer gracefully transitions into autumn, September in Newport Beach boasts an impressive 316 hours of sunshine, making it a delightful month for beachgoers and outdoor enthusiasts. Following the sun-soaked peaks of July and August, which showcased 379 and 361 hours respectively, September’s brightness maintains a vibrant glow yet signals the onset of cooler days. Interestingly, while the daylight hours begin to wane, the flexible warmth of early fall continues to attract visitors eager to soak up the last rays of the season. With autumn’s gradual approach, September stands as a testament to Newport Beach's enduring charm and the lingering allure of the sun.
In Newport Beach, September boasts a 67% chance of sunny weather, making it one of the more promising months for sunshine. This statistic reveals a slight increase compared to the summer months, with August at 65% and July at 57%. Interestingly, the peak sunny days occur in the spring, notably in March with 68%, but September maintains a strong foothold as the summer warmth begins to wane. As the year progresses into autumn, residents and visitors alike can still relish delightful weather before the cooler months set in, making September an ideal time to enjoy the beach and outdoor activities.
As the summer sun begins to wane, September in Newport Beach ushers in a delightful 12 hours of daylight, marking a transition from the peak of summer brightness. Following the intense 14 hours of sunlight seen in June and July, this month brings a gentle decrease, paralleling nature's shift toward the fall season. Interestingly, while September's daylight duration is still generous, it sets the stage for the gradual descent into autumn, as October follows with just 11 hours. This trend showcases a rhythmic ebb and flow of sunlight throughout the year, inviting residents and visitors alike to savor the last rays of summer before the days grow shorter.
As summer transitions to autumn, September in Newport Beach sees the wind pick up a gentle rhythm with an average speed of 3.1 m/s (7 mph). This marks a continuation of the slightly calmer breezes felt throughout July and August, hinting at a tranquil close to the beach season. Interestingly, the average wind speeds for September remain consistent with those of the preceding months, reflecting a stable atmospheric pattern. This trend of mild winds sets the stage for a serene coastal experience, perfect for leisurely walks along the shore or sailing under clear blue skies before the briskness of fall truly arrives. As the year progresses, the fluctuating speeds hint at the seasonal shifts to come, but September’s breezes invite visitors to savor the lingering warmth of summer.
The weather in Newport 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 Newport Beach and find detailed weather information for every month.
In September, the weather tends to be warm and pleasant, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 30°C (86°F), averaging around 20°C (69°F). The month is notably dry, with only 3 mm (0.1 in) of precipitation recorded over zero rainy days, and humidity levels at 68%. In contrast, January experiences cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 22°C (71°F), averaging 14°C (58°F). This month is significantly wetter, receiving 57 mm (2.2 in) of precipitation spread over four rainy days, accompanied by a slight increase in humidity to 74%. For more detailed insights on January weather, you can check Newport Beach weather in January.
September generally boasts warmer temperatures, with averages around 20°C (69°F) and maximums reaching up to 30°C (86°F), while February is notably cooler, averaging 14°C (57°F) and peaking at 22°C (72°F). In addition to the temperature differences, September experiences almost no precipitation, with just 3 mm recorded over 0 days, resulting in a lower humidity level of 68%. In contrast, February sees significantly more rainfall, totaling 49 mm over 6 days, coupled with higher humidity at 79%. For a detailed look at February weather specifics, you can visit Newport Beach weather in February.
In comparing the weather patterns of September and March, significant differences emerge. September boasts warmer temperatures, with averages around 20°C (69°F) and maximums reaching up to 30°C (86°F), while March is notably cooler, featuring an average temperature of 14°C (58°F) and maximums of only 20°C (67°F). Precipitation levels also vary greatly; September experiences virtually no rain, with only 3 mm (0.1 in) across the entire month, whereas March sees a substantial increase in rainfall, totaling 50 mm (2.0 in) over approximately 8 days. Additionally, humidity is slightly lower in September at 68%, compared to March's 75%. For a more detailed look at the specifics of March weather, you can check out Newport Beach weather in March.
September typically enjoys warmer temperatures compared to April, with average highs reaching up to 30°C (86°F) and a pleasant average of 20°C (69°F). In contrast, April sees cooler temperatures, ranging from a minimum of 11°C (53°F) to a maximum of 25°C (78°F), making it feel significantly chillier overall. While September remains mostly dry with only 3 mm of precipitation and no rainy days, April experiences more rainfall, accumulating 22 mm over about 3 days. Both months have relatively high humidity levels, with September at 68% and April slightly higher at 70%. For more detailed information, check out Newport Beach weather in April.
September and May present distinctly different weather patterns. In September, temperatures typically range from a minimum of 17°C (62°F) to a maximum of 30°C (86°F), with an average temperature of around 20°C (69°F). Notably, September enjoys minimal precipitation, averaging only 3 mm (0.1 in) with no rainy days, and humidity levels are moderately high at 68%. In contrast, May experiences cooler temperatures, with a minimum of 12°C (53°F) and a maximum of 21°C (70°F), yielding an average of 16°C (61°F). This month sees more precipitation, averaging 12 mm (0.5 in) across 2 days, accompanied by slightly higher humidity at 70%. For more detailed information, check out Newport Beach weather in May.
When comparing the weather in September and June, September features warmer temperatures, with a minimum of 17°C (62°F) and an average of 20°C (69°F), compared to June's lower minimum of 14°C (58°F) and average of 17°C (64°F). The maximum temperature in September can reach 30°C (86°F), while June's peak is a cooler 25°C (77°F). Both months experience minimal precipitation, with just 3 mm (0.1 in) and no rainy days. However, humidity levels are slightly lower in September at 68% compared to June's 72%. For more details, check out Newport Beach weather in June.
In comparing the weather in September to July, September experiences slightly warmer temperatures, with a minimum of 17°C (62°F) and a maximum of 30°C (86°F), while July has a minimum of 16°C (62°F) and a maximum of 25°C (78°F). Both months have minimal precipitation, with September seeing only 3 mm (0.1 in) and July slightly less at 2 mm (0.1 in), both reporting no rainy days. However, September tends to be more comfortable in terms of humidity, hovering at 68%, compared to July's 73%. Those looking for detailed insights on July weather in Newport Beach can reference this link: Newport Beach weather in July.
In comparing the weather between August and September, both months share similar temperature ranges, with September seeing slightly higher maximum temperatures averaging 30°C (86°F) compared to August’s 26°C (78°F). The minimum and average temperatures are consistent between the two months, remaining at around 17°C (63°F) and 20°C (69°F) respectively. Precipitation remains minimal in both months, with September receiving just 3 mm and August slightly less at 2 mm, both with no rainy days. Humidity levels are also comparable, with September at 68% and August at 69%. For more details on August weather specifics, you can check Newport Beach weather in August.
In September, the weather showcases warm and pleasant conditions, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 30°C (86°F). This month typically boasts very little rain, averaging 3 mm (0.1 in) with no rainy days, and a humidity level of 68%. In contrast, October sees slightly cooler temperatures, dipping to a minimum of 14°C (58°F) and an average of 19°C (67°F), while still reaching highs of 30°C (87°F). Rainfall increases in October to 8 mm (0.3 in) over two days, with humidity remaining relatively stable at 67%. For more detailed weather insights, you can check Newport Beach weather in October.
In September, the weather tends to be warmer, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 30°C (86°F), and almost no precipitation recorded. This creates a pleasant atmosphere with an average temperature of 20°C (69°F) and consistent humidity at 68%. Conversely, November experiences cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 25°C (77°F), alongside increased precipitation of 21 mm (0.8 in) over two rainy days. The average temperature drops to 17°C (63°F), while humidity remains stable at 68%. For more details on November weather specifically, you can check Newport Beach weather in November.
In comparing the weather of September and December, we observe a notable drop in temperatures. September enjoys warmer conditions with daily averages around 20°C (69°F) and maximums peaking at 30°C (86°F). In contrast, December sees cooler temperatures, with minimums around 10°C (51°F) and an average of 15°C (59°F). Precipitation also differs significantly; September experiences virtually no rain with only 3 mm recorded, while December has a much wetter profile with 68 mm of rain over 5 days. Humidity is slightly higher in December at 71%, compared to 68% in September. For more specific insights, you can explore Newport Beach weather in December.
As summer draws to a close, September in Newport Beach offers a beautiful transition with pleasantly warm temperatures and minimal rainfall, making it a prime time for outdoor activities. Unlike the peak heat of July and August, the weather cools slightly, providing a more comfortable climate with average temperatures around 20°C (69°F). With humidity levels at a balanced 68% and no recorded precipitation, visitors can enjoy uninterrupted sunshine and clear blue skies. This ideal weather sets September apart as a delightful month to experience all that Newport Beach has to offer, whether it's lounging on the beach or exploring coastal trails. For more insights into the climate and what to expect year-round, check out Newport Beach Climate.