Last updated: February 24, 2025
In September, Rockland, United States, experiences a delightful transition into autumn, characterized by an average temperature of 16°C (61°F). The month sees maximum temperatures reaching up to 22°C (72°F), while the cooler evenings bring temperatures down to a pleasant 10°C (50°F). Rainfall is moderate, with a total of 97 mm (3.8 in) spread over 8 days, contributing to the region's lush greenery. Coupled with a humidity level of 80%, the atmosphere can feel quite refreshing, making September a charming and inviting time for outdoor activities.
In September, Rockland transitions into a delightful autumnal embrace, with temperatures reflecting a gentle shift from summer warmth to cooler fall days. The minimum temperature starts at a mild 10°C (50°F), while the average settles around a comfortable 16°C (61°F) and peaks at a pleasant 22°C (72°F). This month marks a significant change from the sweltering heights of summer, providing a perfect backdrop for enjoying outdoor activities amid the changing leaves. As September progresses, residents and visitors alike can expect crisp mornings and inviting afternoons, making it an ideal time to savor the beauty of the season.
In September, Rockland experiences a transitional shift in precipitation, with an average of 97 mm (or 3.8 inches) of rainfall spread across 8 days. This marks a slight increase from the drier month of August, which recorded 84 mm (3.3 in) of rain. Notably, September's rainfall continues the pattern of inconsistent precipitation that characterizes the late summer and early autumn months, overshadowing the more substantial downpours typical of spring. As the days gradually shorten and temperatures begin to dip, the adjustment in precipitation hints at the approaching wetter months of October and November, which are forecasted to deliver significantly higher averages of 147 mm (5.8 in) and 128 mm (5.0 in), respectively.
In September, Rockland experiences a gentle shift in humidity, averaging around 80%. This marks a noticeable decrease from the sweltering summer months of June and July, where humidity peaks at 86% and 85% respectively. The transition towards fall brings a slight relief from the summer’s stickiness, although the humidity remains higher than the more drier months of October and April. As autumn approaches, it's clear that while September may not be the driest month, it offers a refreshing change that sets the stage for the cooler, crisper air of the following months. The gradual decline in humidity from the summer's highs showcases the typical climatic progression in Rockland, encouraging both comfort and outdoor enjoyment.
As September rolls into Rockland, the UV Index stands at a high level of 7, indicating that sun exposure can lead to skin damage within 25 minutes for those unprotected. This marks a slight decline from the peak very high readings observed during the summer months, where UV levels reached up to 10 in June and July. The transition towards fall reflects a gradual decrease in the sun’s intensity, making it a pivotal time to remain vigilant with sun safety while enjoying the last rays of summer. For more detailed information, check out the Rockland UV Index.
UV Risk Categories
As summer gradually wanes, September in Rockland embraces a delightful blend of warmth and sunshine, offering an impressive 283 hours of daylight. This is a notable drop from the peak 335 hours in August, yet it still outshines earlier months like July and April. The gradual decline in sunlight hours is part of an expected seasonal rhythm, as the vibrant brightness of June and July gives way to the softer, more mellow days of autumn. With autumn's arrival in October, Rockland will see even less sun, reducing to 222 hours, but September stands as a perfect transition, allowing residents to bask in the lingering sunlight before embracing the cooler, shorter days ahead.
In Rockland, September brings a noticeable uptick in sunshine, with a 44% chance of clear skies, making it one of the brighter months of the year. This increase follows a somewhat gloomy summer, where July and August see lower odds of sunny days at 28% and 31%, respectively. As the seasons transition, the likelihood of sunshine begins to recover, hinting at a delightful autumn ahead. Interestingly, while the sun frequently shines during the spring months of March and November, September stands out as a key point where summer gives way to clearer skies, providing residents and visitors alike with an inviting atmosphere to enjoy outdoor activities before the cooler months set in.
As September arrives in Rockland, the daylight begins to wane, offering approximately 12 hours of sunlight each day. This marks a gentle decline from the summer peak of 15 hours in June and July, signaling the transition into the cozy embrace of autumn. The gradual tapering of daylight reflects a broader yearly trend where longer days in spring and summer gradually give way to shorter ones in fall and winter. The daylight duration in September not only invites shorter evenings but also sets the stage for the stunning fall foliage that captures the heart of the season. As we approach October, one can almost feel the shift in the air, blending the last warm hues of summer with the crispness of autumn days.
As summer fades into the beautiful autumn landscape of Rockland, September brings a gentle resurgence in wind speed, averaging 5.4 m/s (12 mph), similar to the more tranquil breezes of May. This slight uptick in wind is part of a broader trend where the months following the hottest summer days tend to show a gradual increase in airflow, peaking again in the cooler months of October and November. After the lazy, languid breezes of July and August, September's winds begin to signal the approach of fall, creating a refreshing atmosphere that's perfect for outdoor activities and enjoying nature’s transition. This rhythm of blustery months following serene summer days illustrates the dynamic weather patterns that characterize the coastal region, offering both locals and visitors the chance to revel in the shifting seasons.
The weather in Rockland 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 Rockland and find detailed weather information for every month.
In September, the weather is relatively mild, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 22°C (72°F) and an average of 16°C (61°F). There is some rainfall, totaling 97 mm (3.8 in) over about 8 days, accompanied by a humidity level of 80%. In contrast, January presents a starkly different climate, characterized by much colder temperatures that can plunge to a minimum of -17°C (1°F) and only reach a maximum of 11°C (51°F), averaging at -1°C (31°F). January also sees slightly more precipitation at 106 mm (4.2 in) across 9 days, with a humidity level of 85%. For more details on this chilling season, visit Rockland weather in January.
September and February present a stark contrast in weather characteristics. In September, temperatures range from a mild 10°C (50°F) at night to a pleasant high of 22°C (72°F) during the day, with an average of 16°C (61°F). The month experiences about 97 mm (3.8 in) of precipitation over approximately 8 days, accompanied by a humidity level of 80%. In contrast, February is much colder, with temperatures dipping as low as -14°C (7°F) at night and peaking at just 10°C (50°F) during the day, averaging -1°C (31°F). It also sees slightly more precipitation, around 108 mm (4.3 in) over roughly 10 days, and a higher humidity of 86%. The differences in temperatures and precipitation highlight the seasonal shifts between late summer and mid-winter. For more detailed insights, check Rockland weather in February.
September and March present contrasting weather experiences. In September, temperatures range from a mild 10°C (50°F) to a warm 22°C (72°F), with an average of 16°C (61°F). During this month, the region experiences around 97 mm (3.8 in) of precipitation over 8 days, and humidity levels hover around 80%, creating a comfortable early autumn atmosphere.
In contrast, March sees much cooler conditions, with temperatures ranging from a chilly -13°C (8°F) to a maximum of 11°C (52°F), averaging just 1°C (34°F). Despite slightly less precipitation at 86 mm (3.4 in) over about 10 days, the increased humidity of 84% makes the cold feel even more biting. For more details on Rockland's March weather, check out Rockland weather in March.
September and April present quite contrasting weather conditions. In September, temperatures are generally milder, ranging from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), with an average of 16°C (61°F). The month experiences less precipitation, totaling 97 mm (3.8 in) over 8 days, and a humidity level of 80%. In contrast, April is significantly cooler, with temperatures dipping as low as -3°C (28°F) and averaging only 5°C (42°F). It also sees more rainfall, with 151 mm (5.9 in) spread over 14 days, while maintaining a slightly lower humidity of 79%. For more details about weather patterns in April, you can visit Rockland weather in April.
When comparing the weather in September and May, September tends to be milder, with average temperatures ranging from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), while May features cooler conditions, with temperatures spanning from 3°C (37°F) to a maximum of 20°C (68°F). Both months experience similar levels of precipitation, with September seeing about 97 mm (3.8 in) over 8 days and May also receiving 97 mm (3.8 in) but spread over 10 days. Humidity levels are comparable as well, with September at 80% and May slightly lower at 79%. For more detailed information on May weather, you can check Rockland weather in May.
When comparing the weather in September and June, we can see some notable differences. September experiences slightly warmer temperatures with an average of 16°C (61°F), compared to June's average of 14°C (57°F). Both months share the same maximum temperature of 22°C (72°F), but September has a higher minimum temperature of 10°C (50°F) versus June's 8°C (46°F). Precipitation levels are also slightly higher in September, with 97 mm (3.8 in) of rain over 8 days, compared to June's 82 mm (3.2 in) over the same number of days. Humidity tends to be a bit lower in September at 80%, compared to June's 86%. For a more detailed look at June weather specifics, you can refer to Rockland weather in June.
In comparing the weather of September and July, September experiences slightly cooler temperatures with a minimum of 10°C (50°F) and an average of 16°C (61°F), while July is a bit warmer, with a minimum of 12°C (54°F) and an average of 17°C (62°F). Both months have similar precipitation levels, with September receiving 97 mm (3.8 in) over approximately 8 days, whereas July sees a similar total of 98 mm (3.9 in) spread over 10 days. Additionally, humidity is a touch lower in September at 80%, compared to 85% in July, making September feel a bit more comfortable overall. For a closer look at July's weather specifics, check out Rockland weather in July.
In comparing the weather between August and September, September experiences cooler temperatures overall, with a minimum of 10°C (50°F) and an average of 16°C (61°F), while August maintains slightly warmer temperatures, with a minimum of 14°C (57°F) and an average of 18°C (64°F). Both months see a similar number of rainy days, with precipitation recorded at 97 mm (3.8 in) for September and 84 mm (3.3 in) for August. Humidity levels are also relatively close, with September at 80% and August at 83%. For more details on August weather, visit Rockland weather in August.
September tends to be milder, with average temperatures ranging from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), while October sees a noticeable drop, featuring a minimum of 2°C (35°F) and an average around 12°C (54°F). In terms of precipitation, October is wetter, accumulating 147 mm (5.8 in) over 12 days compared to September's 97 mm (3.8 in) over 8 days. Despite the higher humidity in September at 80%, October's humidity is still significant at 77%, indicating a dampness that often characterizes autumn. For a more detailed look at the October weather, check out Rockland weather in October.
In comparing the weather between September and November, there is a notable shift in temperature and precipitation. September typically enjoys milder temperatures, ranging from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), with an average of 16°C (61°F). In contrast, November sees much cooler conditions, with temperatures dipping as low as -11°C (12°F) and averaging only 6°C (44°F). Although September has substantial precipitation of 97 mm (3.8 in) over about 8 days, November experiences even greater rainfall at 128 mm (5.0 in) across 11 days. Both months exhibit high humidity levels of 80%, but the overall chill in November signals the transition into the winter season. For more detailed insights on this month’s climate, visit Rockland weather in November.
In September, temperatures range from a minimum of 10°C (50°F) to a maximum of 22°C (72°F), with an average temperature of 16°C (61°F). The month experiences about 97 mm (3.8 in) of precipitation over 8 days, and humidity sits at around 80%. In contrast, December brings a stark change in weather, with temperatures dipping significantly, ranging from a minimum of -17°C (1°F) to a maximum of 14°C (57°F), and an average temperature of just 1°C (35°F). December is wetter, with 143 mm (5.6 in) of precipitation spread over 11 days and a slightly higher humidity level of 81%. For more information, you can visit Rockland weather in December.
As September rolls in, Rockland's weather showcases a delightful transition, marked by a gentle cooling from the summer heat. With an average temperature of 16°C (61°F), the month sees a blend of mild days and cool evenings. Unlike the hotter summer months, the air feels refreshing and crisp, though you may also notice a significant 80% humidity, adding a touch of moisture to the atmosphere. Rainfall is also on the rise, with about 97 mm over 8 days, making the month busier in terms of precipitation compared to the typically drier summer. If you're keen on understanding more about Rockland's weather patterns throughout the year, check out Rockland Climate.