Last updated: February 24, 2025
September weather in Bethany Beach, United States offers a delightful mix of warmth and coastal charm. With maximum temperatures reaching 31°C (87°F) and an average of 23°C (73°F), visitors can enjoy pleasant days by the shore. The evenings cool down to a comfortable 15°C (59°F), perfect for seaside strolls. Expect a bit of rainfall, as the area receives approximately 97 mm (3.8 in) over 10 days, contributing to the region's lush beauty. High humidity levels of 75% create a tropical feel, making September an inviting time to experience the natural wonders of Bethany Beach.
September in Bethany Beach heralds a seamless transition from the summer heat to the cooler tones of autumn. With minimum temperatures averaging a comfortable 15°C (59°F), the days remain pleasantly warm, peaking at a maximum of 31°C (87°F). The average temperature settles around 23°C (73°F), creating an ideal atmosphere for beachgoers and outdoor enthusiasts. While the warmth lingers from the summer months, the gradual dip in temperatures hints at the upcoming fall, making September a delightful blend of late-summer sun and early autumn breezes. The beach remains vibrant, inviting visitors to soak up the sun before the cool, crisp air of October sets in.
In September, Bethany Beach experiences a gentle transition in weather, marked by 97 mm (3.8 in) of precipitation over about 10 days. This reflects a slight dip in rainfall compared to the summer months, where August brought a heftier 111 mm (4.4 in), indicating a shift towards drier conditions as autumn approaches. While the frequency of rainy days remains relatively steady, the overall decrease in precipitation hints at the settling of late-summer storms. As the season changes, this balance creates a cozy atmosphere, perfect for enjoying the last warm days at the shore before the chill of autumn sets in.
As the summer fades in September, Bethany Beach experiences a noticeable shift in humidity levels, averaging 75% this month. This marks a slight increase from the drier days of August, when humidity dipped to 72%. The trend shows a gradual rise in humidity as the year progresses, with early fall conditions still comfortably balanced compared to the high levels of winter. January and February see the peak humidity at 84%, creating a stark contrast to the lows observed in the heart of summer. While September's humidity allows for a pleasant beach experience, it also signals the approach of wetter months ahead, as the levels subsequently surge back to 81% in October and soar to 85% in November.
In September, Bethany Beach experiences a noticeable shift as summer winds down, yet the UV Index remains high, measuring at 8. This puts the area in the very high exposure category, meaning locals and visitors should remain vigilant under the sun. With a burn time of just 15 minutes, it's imperative to apply sunscreen and seek shade during peak hours. Comparatively, the UV levels have slightly decreased from the blazing heights of 10 in the summer months, but September certainly still packs a punch. As the year transitions into the fall, UV exposure trends show a gradual decline towards more moderate levels in October. For a detailed look at UV trends throughout the year, explore Bethany Beach UV Index.
UV Risk Categories
September in Bethany Beach is a beautiful transition into autumn, showcasing 294 hours of sunshine. This delightful month follows the sun-soaked peak of July, which boasts the most hours at a bright 365. As summer bids farewell, the sunlight begins to wane slightly, yet September still offers a generous amount of bright days, making it the perfect time for beach walks and outdoor activities. With an impressive total that outshines October’s 259 hours, September holds onto warmth and brightness just a little longer, leaving residents and visitors alike eagerly embracing the crisp but sunny days ahead.
In Bethany Beach, September emerges as one of the sunniest months, boasting a 57% chance of sunshine. This marks a notable rise compared to the summer months, where July peaks at 53% and August dips to 37%. As summer winds down, the weather begins to stabilize, leading to a pleasant increase in sunny days. This trend suggests that while the heat of summer gradually fades, September rewards visitors with brighter skies, making it an ideal time to enjoy the beach before autumn arrives. The month represents a transitional period where the warmth lingers, providing a perfect backdrop for coastal activities amidst a backdrop of crisper air and beautiful sunsets.
As summer fades into fall in Bethany Beach, September showcases a gradual shift in daylight, offering approximately 12 hours of sunlight. This marks a slight decline from the 14 hours enjoyed during the peak summer months of June through August. The transition into autumn is evident as daylight hours begin to contract, hinting at the cozy, shorter days ahead. With each passing month, the days grow shorter, reflecting the seasonal rhythm of nature, while September remains a beautiful time to relish the lingering warmth of summer amidst the changing tides.
As summer transitions into fall, September in Bethany Beach brings a gentle breeze, with an average wind speed of 5.1 m/s (11 mph). This shift marks a slight increase from the calmest months of July and August, when winds dipped to 4.4 m/s (10 mph) and 3.6 m/s (8 mph), respectively. The wind speed in September hints at the onset of autumn, as it gradually picks up again in October to 5.6 m/s (13 mph). Overall, September offers a perfect blend of mild temperatures and refreshing winds, making it an ideal time for visitors to enjoy coastal activities before the colder months arrive.
The weather in Bethany 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 Bethany Beach and find detailed weather information for every month.
The weather in September and January contrasts dramatically. In September, temperatures typically range from a minimum of 15°C (59°F) to a comfortable average of 23°C (73°F), reaching a max of 31°C (87°F). However, it is also a relatively humid month with 75% humidity and about 97 mm (3.8 in) of precipitation spread over 10 days. In stark contrast, January brings much colder conditions, with temperatures plummeting to a minimum of -12°C (11°F) and an average of just 4°C (40°F), peaking at 18°C (64°F). Although January experiences less rainfall than September, with only 82 mm (3.2 in) over 8 days, the humidity is slightly higher at 84%. For a closer look at January conditions, check out Bethany Beach weather in January.
In September, the weather tends to be warm, with average temperatures ranging from a mild 15°C (59°F) to a high of 31°C (87°F), accompanied by a considerable amount of precipitation totaling 97 mm (3.8 in) over about 10 days. The humidity level is relatively high at 75%, adding a slight stickiness to the warm days.
In contrast, February experiences much colder conditions, where temperatures can plummet to a minimum of -10°C (14°F), with average highs reaching only 17°C (62°F). Precipitation in February is slightly higher at 114 mm (4.5 in), occurring over 12 days, and the humidity increases to 83%, contributing to a chillier atmosphere. For more details, you can check out Bethany Beach weather in February.
September and March present quite contrasting weather patterns. In September, temperatures range from a mild 15°C (59°F) at night to a warm 31°C (87°F) during the day, with an average of 23°C (73°F) and relatively high humidity at 75%. This month tends to have around 97 mm (3.8 inches) of precipitation over approximately 10 days. On the other hand, March experiences much cooler temperatures, with lows plunging to -4°C (26°F) and highs peaking at 21°C (71°F), averaging 7°C (45°F). Although it sees slightly more precipitation at 102 mm (4.0 inches) across 11 days, the humidity is higher at 83%. For more information on what to expect during this month, check out Bethany Beach weather in March.
When comparing the weather in September to that of April, notable differences emerge. September boasts a warmer climate, with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 31°C (87°F), while April's temperatures are significantly cooler, with averages between 2°C (35°F) and 24°C (76°F). Both months experience a similar level of precipitation, with September receiving 97 mm (3.8 in) over about 10 days, and April slightly less at 87 mm (3.4 in) over 11 days. However, April tends to be humider, with humidity levels at 81% compared to September's 75%. For more detailed insights, you can refer to Bethany Beach weather in April.
In comparing the weather of September and May, we notice distinct differences in temperature and precipitation. September typically boasts a warm average temperature of 23°C (73°F), with maximums reaching up to 31°C (87°F), while May's temperatures are cooler, averaging only 16°C (62°F) and peaking at 28°C (83°F). Both months experience a fair amount of rainfall, with September receiving 97 mm (3.8 in) over 10 days and May slightly wetter at 120 mm (4.7 in) across 11 days. Additionally, humidity levels remain high in both months, with September at 75% and May slightly higher at 78%. For detailed insights on May weather, you can check out Bethany Beach weather in May.
When comparing the weather in September and June, we see some notable differences. September generally experiences slightly warmer temperatures, with averages around 23°C (73°F) compared to June's average of 22°C (71°F). The maximum temperatures in September can reach up to 31°C (87°F), while June peaks at 30°C (86°F). In terms of precipitation, September is wetter, with 97 mm (3.8 in) of rain over approximately 10 days, compared to June's 82 mm (3.2 in) spread over 11 days. Humidity levels are also high in both months, with September at 75% and June at 79%. For more detailed insights on June weather specifically, you can check Bethany Beach weather in June.
In comparing the weather of September and July, September tends to be slightly cooler, with minimum temperatures averaging 15°C (59°F) compared to July’s warmer minimum of 19°C (66°F). The average temperature in September is 23°C (73°F), whereas July averages at 25°C (78°F), with both months peaking around similar max temperatures of 31°C (87°F) in September and 32°C (90°F) in July. Precipitation levels are a bit higher in July, totaling 114 mm (4.5 in) over 11 days, compared to 97 mm (3.8 in) over 10 days in September. Humidity is relatively stable between the two months, with September being at 75% and July at 74%. For more details on July's weather specifically, check out Bethany Beach weather in July.
In comparing the weather between September and August, we see that September experiences slightly cooler temperatures, with a minimum of 15°C (59°F) and an average of 23°C (73°F), compared to August's minimum of 19°C (66°F) and average of 25°C (77°F). Both months share similar maximum temperatures, peaking at around 31°C (87°F) in September and 31°C (88°F) in August. However, September has lower precipitation with 97 mm (3.8 in) over 10 days, whereas August sees more rainfall at 111 mm (4.4 in) across 14 days. Humidity levels are also comparable, with September at 75% and August slightly lower at 72%. For more detailed insights, you can check out Bethany Beach weather in August.
In September, the weather is generally warm with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 31°C (87°F), averaging around 23°C (73°F). The month sees about 97 mm (3.8 in) of precipitation over approximately 10 days and maintains a humidity level of 75%. In contrast, October experiences cooler temperatures, with a minimum of 7°C (45°F) and an average of 18°C (65°F), peaking at 29°C (85°F). The month is also wetter, with 137 mm (5.4 in) of rain over about 11 days and a slight rise in humidity to 81%. For more detailed information, you can check out Bethany Beach weather in October.
September and November present a striking contrast in weather conditions. In September, temperatures are generally mild to warm, with a minimum of 15°C (59°F) and a maximum of 31°C (87°F), averaging around 23°C (73°F). This month also experiences higher humidity at 75% and considerable rainfall, with 97 mm (3.8 in) spread over 10 days. In contrast, November sees a notable drop in temperatures, with minimums reaching as low as -1°C (30°F) and an average of only 11°C (52°F). The maximum temperature in November can go up to 22°C (73°F), but overall, the month is cooler, with slightly less precipitation (95 mm or 3.8 in) occurring over just 8 days and humidity rising to 85%. For more detailed information, you can visit Bethany Beach weather in November.
September and December showcase stark contrasts in weather. In September, temperatures are generally warmer, with a minimum of 15°C (59°F) and an average of 23°C (73°F), peaking at a comfortable 31°C (87°F). The month receives about 97 mm (3.8 in) of precipitation over 10 days and has a humidity level of 75%. In sharp contrast, December sees much cooler weather, with temperatures ranging from a chilly -6°C (21°F) at night to a maximum of 19°C (66°F) during the day, and an average of just 7°C (45°F). Additionally, December experiences slightly more precipitation at 116 mm (4.6 in) over the same number of days, but with higher humidity at 84%. For more detailed information, visit Bethany Beach weather in December.
As summer gives way to fall, September in Bethany Beach showcases a delightful transition with warm temperatures, averaging around 23°C (73°F), and the occasional rise to a comfortable 31°C (87°F). While the humidity lingers at about 75%, the month marks a slight uptick in rainfall, with around 10 days experiencing precipitation. This blend of warmth and moisture creates a unique charm, distinctly different from the hotter summer months, making it an ideal time for visitors to enjoy the beach before the cooler autumn weather sets in. For more insights on how the weather shapes your experience, explore the Bethany Beach Climate.