Last updated: February 24, 2025
In Rehoboth Beach during September, temperatures range from a refreshing 15°C (59°F) at night to a warm 29°C (84°F) during the day, with an average of 22°C (73°F) that perfectly captures the essence of early autumn. While the humidity lingers around 75%, adding a touch of warmth to the coastal air, the area experiences 9 days of rainfall totaling 102 mm (4.0 in), reminding visitors of nature's unpredictability. Whether you’re sunbathing on the beach or strolling through the charming streets, September offers a delightful mix of summer's end and fall's arrival, making it an enchanting time to explore this vibrant seaside destination.
As summer wanes, September in Rehoboth Beach ushers in a delightful transition with pleasantly mild temperatures. The month is marked by a minimum temperature rising to 15°C (59°F), an average of 22°C (73°F), and peaks at 29°C (84°F), providing an inviting atmosphere for beachgoers and outdoor enthusiasts alike. This gradual cooling from the sweltering summer heat makes September an ideal time to enjoy the picturesque coastline and vibrant local events. With evenings becoming more refreshing, it's the perfect season for sunsets by the shore, as the warm days gently fade into a crisp fall ambiance.
In September, Rehoboth Beach experiences a moderate precipitation level, receiving an average of 102 mm (4.0 in) of rain over 9 days. This signals a shift as the summer months taper off, with precipitation in September wrapping up a relatively wet season. Compared to August's 111 mm (4.4 in), the rainfall slightly decreases, continuing a trend observed throughout the year where spring and early summer often yield higher totals. The balance of sunny and rainy days provides a pleasant transition into autumn, allowing visitors to enjoy the beach while still being mindful of occasional showers. Overall, September's climatological patterns highlight a gradual change, setting the stage for the typically wetter and cooler months ahead.
As summer gently transitions into fall, September in Rehoboth Beach brings a noticeable shift in humidity levels. After the warmer months of July and August, which boast the lowest humidity percentages at 74% and 72% respectively, September sees a moderate increase to 75%. This marks an intriguing shift as the heat wanes, blending the remnants of summer with the cooler, crisper air of autumn. The trend reflects a gradual rise in humidity heading into October, which sees a return to 81%. Overall, September serves as a bridge, offering a comfortable environment for enjoying the beach before the onset of the chillier months ahead.
As September rolls into Rehoboth Beach, the UV Index remains impressively high, measuring 8 on the scale. This indicates a significant risk of harm from unprotected sun exposure, necessitating vigilance even as summer winds down. Like the preceding months, September falls within the very high exposure category, reminiscent of peak summer values, but it does see a slight dip from August's consistent 10. With a burn time of just 15 minutes, it's crucial for sunbathers and beachgoers to prioritize sun protection during this transitional season. As autumn approaches, maintaining awareness of UV levels is essential for safe outdoor enjoyment. For more detailed insights and daily updates, visit the Rehoboth Beach UV Index.
UV Risk Categories
As summer wanes and autumn approaches, September in Rehoboth Beach still basks in a generous 286 hours of sunshine, showcasing a vibrant transition from the sun-drenched days of July and August. This month marks a notable decline from the peak sunshine of 360 hours in July, yet it remains significantly brighter than the winter months ahead. With the daylight beginning to shorten, September offers a perfect balance for beachgoers and nature enthusiasts who enjoy milder temperatures and fewer crowds. The trend of gradually decreasing sunlight continues into October, but the warm glow of late summer lingers, making September an ideal time to savor the last rays of sunshine before the brisk fall sets in.
In Rehoboth Beach, the likelihood of enjoying sunny weather peaks in September, with a 57% chance of sunshine that month. This marks a noticeable increase compared to the summer months, where July presents a moderate 55% and August drops to 37%. As the summer heat begins to wane, September offers a delightful transition into autumn, often characterized by clear skies and pleasant temperatures. Interestingly, this uptick in sunny days stands out against the backdrop of a generally mixed bag of weather in the preceding months, particularly June and August, making September an ideal time for beachgoers and sun seekers to embrace the beauty of Rehoboth Beach.
As summer transitions into fall, September in Rehoboth Beach serves as a gentle reminder of the changing seasons, with daylight hours tapering to an average of 12 hours. This decline follows a peak during the warmer months, where July basked in a generous 14 hours of sunlight. The gradual decrease from the summer's vibrant brightness is mirrored in August's 13 hours, leading us into September's softer glow. While daylight diminishes, the beautiful early autumn landscape beckons residents and visitors alike, offering a perfect blend of warmth and a touch of crispness in the air. As days shorten further into October with only 11 hours of daylight, September becomes a delightful bridge between summer's exuberance and the approaching cozy comforts of fall.
As summer fades into autumn, September in Rehoboth Beach brings a refreshing change with an average wind speed of 5.6 m/s (12 mph). This gentle breeze signifies a transition from the calm of summer, where wind speeds typically drop to their lowest in July and August, to a more energetic October, which sees a slight uptick to 6.1 m/s (14 mph). Unlike the winter months when gusts pick up significantly, September's winds, though modest, provide a pleasant backdrop for beachgoers savoring the last warm days of the year. The consistent wind patterns throughout the year highlight a cycle where spring and early summer exhibit lighter breezes, while fall and winter bring more robust winds, making September a sweet spot for those seeking a balance between warmth and cooling winds.
The weather in Rehoboth 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 Rehoboth Beach and find detailed weather information for every month.
September and January present starkly contrasting weather conditions. In September, temperatures range from a comfortable minimum of 15°C (59°F) to a warm maximum of 29°C (84°F), with an average of 22°C (73°F). The month also experiences considerable precipitation, totaling 102 mm (4.0 in) over about nine days, paired with a moderate humidity level of 75%. In contrast, January brings much colder weather with temperatures dipping to a minimum of -11°C (13°F) and peaking at 16°C (62°F), resulting in a chilly average of just 4°C (39°F). Precipitation in January amounts to 83 mm (3.3 in) over a similar number of rainy days, but with a higher humidity of 84%. For more detailed insights into January weather, you can visit Rehoboth Beach weather in January.
September and February present starkly contrasting weather conditions. In September, temperatures range from a mild 15°C (59°F) at night to a warm 29°C (84°F) during the day, accompanied by an average humidity of 75% and a total precipitation of 102 mm (4.0 in) over 9 days. Conversely, February is characterized by significantly colder temperatures, with a minimum of -10°C (14°F) and a maximum of 14°C (58°F), along with a higher average humidity of 83%. Precipitation in February is also greater, totaling 125 mm (4.9 in) over 12 days. For more detailed information about February weather specifics, you can visit Rehoboth Beach weather in February.
When comparing the weather in September and March, a stark contrast emerges. September enjoys mild temperatures, with an average of 22°C (73°F) and highs reaching up to 29°C (84°F), making it a comfortable month for outdoor activities. However, it is accompanied by a notable amount of rainfall, totaling 102 mm (4.0 in) over approximately 9 days. In contrast, March presents a much cooler climate, with average temperatures around 7°C (44°F) and a maximum of 18°C (65°F). The month is slightly wetter, receiving 113 mm (4.5 in) of precipitation over about 10 days, and humidity levels are higher at 83%. For more detailed information, you can check Rehoboth Beach weather in March.
In comparing the weather of September and April, it’s evident that September enjoys warmer temperatures, with averages around 22°C (73°F) and maximums reaching 29°C (84°F), contrasting sharply with April, where the average hovers at a cool 11°C (52°F) and highs only reach 22°C (72°F). While September experiences 102 mm (4.0 in) of precipitation over 9 days, April's conditions are slightly drier, with 91 mm (3.6 in) falling over a slightly longer 11-day span. Additionally, humidity levels in April are a bit higher at 81%, compared to 75% in September, contributing to the overall feeling of dampness as the spring season transitions into warmer months. For more details, check out Rehoboth Beach weather in April.
In comparing the weather of September and May, September tends to be warmer with average temperatures around 22°C (73°F), peaking at a comfortable 29°C (84°F). In contrast, May has cooler averages at 16°C (61°F) and a maximum of 26°C (79°F). While September features fewer rainy days with 9 days of precipitation totaling 102 mm (4.0 in), May experiences slightly more rainfall at 135 mm (5.3 in) over 11 days, contributing to a higher humidity level of 78%. For a more detailed look at the weather in May, check out Rehoboth Beach weather in May.
In comparing the weather of September and June, both months feature relatively mild temperatures, but September tends to be slightly warmer, with average highs reaching 29°C (84°F) compared to June's 28°C (83°F). September also experiences higher precipitation, totaling 102 mm (4.0 in) over 9 days, while June has less rainfall at 78 mm (3.1 in) across 8 days. Humidity levels are similar, with September at 75% and June slightly higher at 79%. For a more detailed look at conditions during this time, check out Rehoboth Beach weather in June.
In comparing the weather of September and July, September experiences slightly cooler temperatures, with minimums around 15°C (59°F) and averages of 22°C (73°F), while July's temperatures start higher, with minimums around 20°C (69°F) and averages of 25°C (77°F). July typically boasts more warmth, peaking at 31°C (88°F), compared to September's maximum of 29°C (84°F). Rainfall is relatively consistent between the two months, with September recording 102 mm (4.0 in) and July slightly higher at 112 mm (4.4 in), both experiencing precipitation on about nine days. Humidity levels remain similar, with September at 75% and July at 74%. For more detailed insights, you can check Rehoboth Beach weather in July.
In comparing the weather of September and August, September tends to be slightly cooler with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 29°C (84°F), while August is warmer, featuring a minimum of 19°C (66°F) and a maximum of 30°C (86°F). Additionally, September experiences more precipitation, with 102 mm (4.0 in) over 9 days, compared to August, which has 111 mm (4.4 in) over 12 days. Humidity levels are also comparable, with September at 75% and August slightly lower at 72%. For a more detailed look at the conditions in August, you can check out Rehoboth Beach weather in August.
September temperatures are generally warmer, with minimums around 15°C (59°F) and averages reaching 22°C (73°F), while October experiences cooler nights, dropping to a minimum of 8°C (47°F) with an average of 18°C (65°F). Both months see significant humidity levels, but October is slightly higher at 81% compared to September's 75%. Precipitation increases in October, with an average of 146 mm (5.8 in) across 11 days, compared to September's 102 mm (4.0 in) over 9 days. For a detailed look at the weather specific to Rehoboth Beach, check out this link: Rehoboth Beach weather in October.
September weather is typically warmer, with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 29°C (84°F), while November experiences much cooler temperatures, dipping as low as -1°C (30°F) and averaging around 11°C (52°F). Both months see a similar amount of precipitation, with September recording 102 mm (4.0 in) and November slightly less at 100 mm (3.9 in), though humidity is slightly higher in November at 85% compared to September's 75%. Overall, September offers a more temperate climate, making it ideal for outdoor activities, whereas November brings the chill of early winter. For more detailed weather insights, you can visit Rehoboth Beach weather in November.
In September, temperatures are mild, ranging from a minimum of 15°C (59°F) to a maximum of 29°C (84°F), with an average of 22°C (73°F). The month experiences moderate precipitation, with about 102 mm (4.0 in) spread over 9 days and a humidity level of 75%. In contrast, December brings much colder weather, with temperatures dropping significantly to a minimum of -6°C (22°F) and averaging just 7°C (45°F), peaking at a maximum of 17°C (64°F). Precipitation slightly increases to 125 mm (4.9 in) over 10 days, while humidity rises to 84%. For a detailed look at the December weather in this region, you can visit Rehoboth Beach weather in December.
As summer fades into fall, September in Rehoboth Beach offers a delightful transition, marked by comfortably warm temperatures and a noticeable increase in humidity. While the maximum warmth lingers, the evenings cool down, creating a more refreshing atmosphere compared to the sweltering highs of July and August. Rainfall becomes a bit more frequent, with September experiencing a few more drizzly days, yet overall, the month remains enjoyable for outdoor activities. This combination of warmth and occasional rain sets September apart from the hotter summer months, while still providing a perfect backdrop to experience the serene beauty of the beach. For a deeper dive into how these weather patterns evolve throughout the year, visit Rehoboth Beach Climate.