Last updated: February 24, 2025
September in Manhattan, United States showcases a spectrum of weather that captures the essence of early fall. With a maximum temperature peaking at 33°C (92°F) and an average of 21°C (70°F), the city experiences warm days ideal for outdoor activities. However, as chilly evenings set in, temperatures can dip to a cool 9°C (49°F). This month also brings about a moderate precipitation level of 92 mm (3.6 in) over 9 days, adding a refreshing touch to the atmosphere while maintaining a humidity level of 68%. Overall, September offers a dynamic blend of warmth and coolness, perfect for enjoying Manhattan's vibrant urban life.
As summer gracefully transitions into autumn, September in Manhattan showcases a delightful shift in temperatures. The month begins with crisp mornings, where lows drop to around 9°C (49°F), inviting residents to embrace the outdoors in cozy layers. By midday, the average temperature reaches a comfortable 21°C (70°F), perfect for exploring the city’s cultural offerings. As the sun sets, temperatures can peak at a toasty 33°C (92°F), offering a final taste of summer warmth. This blend of cool breezes and warm afternoons makes September a vibrant time to experience the dynamic pace of Manhattan while enjoying the beginning of the fall season.
In September, Manhattan experiences a moderate shift in precipitation patterns, with 92 mm (3.6 in) of rainfall spread over approximately 9 days. This amount is on par with the drier months of January and November, suggesting a transition from the summer's wetter conditions where July and August recorded significantly higher rainfall at 148 mm (5.8 in) and 127 mm (5.0 in), respectively. The decrease in rainy days compared to the summer peaks, paired with a gradual increase leading into October's average of 128 mm, indicates a backdrop of change as the city heads into fall. This balance of rain highlights a unique characteristic of early autumn in Manhattan, making it a time of refreshing breezes and occasional showers.
In September, Manhattan experiences a notable shift in humidity, with levels averaging 68%. This marks an increase from the summer months, where July and August recorded 62% and 65%, respectively. As the city transitions into fall, the humidity begins to rise again, reflecting the typical characteristics of autumn in urban environments. Interestingly, this slight uptick positions September as a bridge between the drier summer season and the more humid months that follow, with October climbing to 74%. Overall, the humidity trend reveals a gradual return to the moisture-laden air that defines the winter months, where averages soar back to the 80% range by December.
As summer fades into autumn, September in Manhattan maintains a notably high UV Index of 8, classifying the sun exposure risk as very high. With a burn time of just 15 minutes, it's crucial for residents and visitors alike to remain vigilant about sun protection, especially as they transition from the more intense summer months. The UV Index has seen a gradual decline from the peak values of 10 in June and July, but caution is still warranted. This trend reveals a notable shift in late summer sun intensity, illustrating the need for ongoing awareness as we head into cooler months. To stay informed about daily UV levels and protection measures, be sure to check the detailed forecasts at Manhattan UV Index.
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As summer wanes, September in Manhattan still basks in the warmth of 272 hours of sunshine, a testament to the lingering glow of the season. This month marks a gentle transition, gradually dipping from the sun-drenched peaks of July and August, which feature 339 and 309 hours respectively. The sunny days in September are a reflection of nature's balance, as the vibrant energy of summer gives way to the crispness of autumn. Following the pattern established earlier in the year, sunshine hours begin to decline, hinting at the brisk October ahead with its 218 hours. Yet, September's abundant light invites residents to savor the mellow days and celebrate the last hurrahs of summer before the cooler months set in.
In Manhattan, the likelihood of sunny weather in September stands at 45%, reflecting a slight uptick from the summer months, particularly August, which plummets to 29%. This signals a transition into the fall season, where the chances of sunshine are akin to those seen in April and May. Notably, September's sunny prospects are more favorable than those in the sweltering peak of summer, yet still lower than the sunny spells anticipated in November. As the city begins to cool, early September can offer delightful sunny days, making it an ideal time for outdoor activities before the brisk autumn air fully sets in.
As autumn draws near in Manhattan, September marks a transition in daylight duration, with the city basking in an average of 12 hours of sunlight. This month sees a gradual decline from the vibrant 14 hours often enjoyed in May and June, gently leading into the shorter days of fall. The trend reflects nature’s rhythm, as daylight fades from summer’s peak toward winter’s early dusk, inviting New Yorkers to savor the lingering warmth before the brisk chill settles in. With each passing week in September, the balance of light and shadow shifts, adding a unique charm to the early autumn atmosphere.
As September unfolds in Manhattan, the city experiences a gentle increase in wind speed, averaging 3.1 m/s (7 mph). This slight uptick compared to the summer months—where wind speeds lingered around 2.5 to 2.6 m/s (6 mph)—suggests a refreshing transition into fall. While the early months of the year boast a steadier breeze, hovering between 3.4 and 3.7 m/s (8 mph), the summer's calm gives way to a milder but still invigorating airflow as autumn approaches. With the winds picking up just as the leaves begin to change, September in Manhattan serves as a beautiful harbinger of the season's transformation, inviting both residents and visitors to enjoy the crisp air while exploring the vibrant cityscape.
The weather in Manhattan 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 Manhattan and find detailed weather information for every month.
September and January present starkly contrasting weather patterns. In September, temperatures range from a mild 9°C (49°F) at night to a warm 33°C (92°F) during the day, with an average of 21°C (70°F). The month experiences about 92 mm (3.6 in) of precipitation over 9 days, accompanied by a humidity level of 68%. Conversely, January sees frigid conditions, with temperatures plunging to a minimum of -18°C (-1°F) and averaging just 1°C (34°F), peaking at 18°C (64°F). This month brings slightly less rainfall, totaling 67 mm (2.7 in) over 7 days, but with a higher humidity level of 84%. For more details on the cold January weather, visit Manhattan weather in January.
September and February present notably contrasting weather conditions. In September, the minimum temperature hovers around 9°C (49°F), with an average of 21°C (70°F) and highs reaching up to 33°C (92°F). This month experiences moderate precipitation, totaling 92 mm (3.6 in) over approximately 9 days, accompanied by a humidity level of 68%. In stark contrast, February is much colder, with temperatures ranging from a minimum of -16°C (4°F) to a maximum of 20°C (68°F) and an average of just 2°C (36°F). February sees slightly higher precipitation at 102 mm (4.0 in), spread over about 10 days, and a higher humidity level of 82%. For a closer look at what to expect, check out Manhattan weather in February.
September and March exhibit striking differences in weather conditions. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 33°C (92°F), creating a warm and pleasant atmosphere with an average temperature of 21°C (70°F). The month sees about 92 mm (3.6 in) of precipitation over 9 days, and humidity levels sit at 68%. In contrast, March experiences much cooler temperatures, with a minimum of -9°C (16°F) and a maximum of 25°C (77°F), averaging only 5°C (42°F). Although March has slightly higher precipitation at 98 mm (3.8 in) over 10 days, the humidity rises to 81%, making it feel damp and chilly. For a more detailed look at March's climate, check out Manhattan weather in March.
When comparing the weather in September and April, we observe notable differences in temperature and precipitation. September typically enjoys warmer temperatures, with a minimum of 9°C (49°F) and an average of 21°C (70°F), peaking at 33°C (92°F). In contrast, April starts off cooler, featuring minimum temperatures of -1°C (31°F) and an average of just 11°C (52°F), though it can reach highs of 27°C (82°F). Precipitation is slightly more frequent in April with 112 mm (4.4 in) over 12 days, compared to September's 92 mm (3.6 in) over 9 days. Additionally, April tends to be more humid, with levels reaching 78% compared to September's 68%. For more detailed insights, you can refer to Manhattan weather in April.
September and May both showcase transitional weather, though they differ significantly in temperature and precipitation patterns. September typically enjoys a warmer climate with average temperatures around 21°C (70°F) and highs reaching up to 33°C (92°F), whereas May has a cooler average of 17°C (62°F) and peaks at 31°C (88°F). In terms of precipitation, May sees slightly more rainfall with 114 mm (4.5 in) over 13 days compared to September's 92 mm (3.6 in) over 9 days. Despite the differences, both months maintain a similar humidity level, hovering around 68-69%. For more detailed insights, you can check out Manhattan weather in May.
Comparing the weather in September and June reveals some interesting similarities and differences. Both months feature comparable average temperatures, with September averaging around 21°C (70°F) and June slightly warmer at 22°C (72°F). The maximum temperatures in June can reach up to 35°C (94°F), which is higher than September's peak of 33°C (92°F). Precipitation levels are the same at 92 mm (3.6 in), but June tends to be wetter with rain on 13 days compared to September's 9 days. Humidity remains fairly consistent, with September at 68% and June slightly higher at 69%. For more detailed insights, you can check Manhattan weather in June.
When comparing the weather in September to July, it's clear that July tends to be warmer and more humid. July features a higher average temperature of 26°C (78°F), with maximums reaching up to 36°C (96°F), whereas September’s average temperature is milder at 21°C (70°F), with max temperatures hitting 33°C (92°F). Additionally, July experiences more precipitation, totaling 148 mm (5.8 in) over approximately 13 days, compared to September's 92 mm (3.6 in) over 9 days. However, September enjoys slightly higher humidity levels at 68% compared to July's 62%. For more detailed insights on July’s climate, you can refer to Manhattan weather in July.
In comparing the weather between September and August, September exhibits a more moderate temperature range, with a minimum of 9°C (49°F) and a maximum of 33°C (92°F), leading to an average temperature of 21°C (70°F). In contrast, August tends to be warmer, showcasing a minimum of 16°C (61°F) and a maximum of 34°C (93°F), with an average of 25°C (76°F). Additionally, September experiences less rainfall, totaling 92 mm (3.6 in) over 9 days, compared to August's 127 mm (5.0 in) over 14 days. Humidity levels are slightly higher in September at 68%, compared to 65% in August. For more detailed information, you can check Manhattan weather in August.
September weather presents a milder warmth, with average temperatures ranging from a low of 9°C (49°F) to a high of 33°C (92°F), while generally maintaining a comfortable average of 21°C (70°F). In contrast, October experiences a noticeable drop in temperatures, with averages around 16°C (61°F), and nighttime lows plunging to 4°C (39°F). Despite both months sharing similar maximum temperatures, October sees an increase in precipitation, measuring 128 mm (5.0 in) over 10 days, compared to September's 92 mm (3.6 in) over 9 days. Additionally, October's humidity rises slightly to 74%, making the air feel a bit heavier than in September, which had a humidity level of 68%. For a more detailed look at October weather conditions, check out Manhattan weather in October.
September and November showcase contrasting weather patterns. In September, temperatures range from a mild 9°C (49°F) at night to a warm average of 21°C (70°F), peaking at a scorching 33°C (92°F), accompanied by a relatively high humidity of 68%. This month experiences about 92 mm (3.6 in) of rainfall over 9 days, making it a transition from summer to autumn.
In sharp contrast, November brings cooler temperatures, with nighttime lows dipping to -9°C (17°F) and an average of 8°C (47°F), while the maximum reaches a comfortable 24°C (75°F). Despite slightly lower precipitation at 83 mm (3.3 in) over 8 days, humidity rises to 82%, contributing to a crisp atmosphere. For more details on November's weather patterns, you can explore Manhattan weather in November.
In September, the weather is generally warm with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 33°C (92°F) and an average of 21°C (70°F). The month experiences about 92 mm (3.6 in) of precipitation over 9 days, and humidity levels sit at 68%, creating a relatively comfortable atmosphere. In contrast, December sees a significant drop in temperatures, with minimums plunging to -11°C (13°F) and an average of only 4°C (39°F), peaking at a mild 18°C (64°F). This month receives slightly more precipitation at 106 mm (4.2 in) over 10 days, coupled with higher humidity at 80%. For more about weather conditions during this month, refer to Manhattan weather in December.
As summer transitions into autumn, September in Manhattan offers a unique blend of warmth and early fall charm that sets it apart from the sweltering months of July and August. The average temperatures hover comfortably around 21°C (70°F), while the potential for warmer days can reach up to a maximum of 33°C (92°F). However, the cooler nights, with lows dipping to 9°C (49°F), provide a refreshing contrast to the heat of summer. Unlike the peak summer humidity, September's average humidity of 68% begins to ease, making outdoor activities more enjoyable. With approximately 92 mm of precipitation spread over about 9 days, this month marks a gentle transition, offering just the right amount of rain to keep the city vibrant. For those looking to plan a visit or simply revel in the beauty of September in Manhattan, the weather provides an inviting backdrop. For more detailed insights, visit Manhattan Climate.