Last updated: February 24, 2025
In September, Lambertville experiences a delightful transition into fall, characterized by a maximum temperature reaching 34°C (94°F) and a comfortable average of 21°C (70°F). However, cool evenings can dip to a brisk minimum of 6°C (42°F), showcasing the charming variability of the season. This month also brings about 91 mm (3.6 in) of precipitation over approximately 10 days, resulting in a humidity level of 66% that enhances the vibrant autumn foliage. Whether enjoying warm afternoons or cool nights, the weather in Lambertville offers a unique blend of seasonal beauty and refreshing change.
As September rolls into Lambertville, residents experience a notable shift in temperatures, signaling the gentle transition from summer into fall. With minimum temperatures averaging around 6°C (42°F) and daily highs peaking at 34°C (94°F), the month presents a delightful blend of warmth and crispness. The average temperature of 21°C (70°F) creates a comfortable atmosphere perfect for outdoor activities, making it an ideal time for enjoying the stunning autumn scenery. As days shorten and nights grow cooler, the temperature trend sets the stage for the vibrant fall foliage that Lambertville is renowned for, bridging the warmth of summer with the cool embrace of autumn.
In September, Lambertville experiences a notable shift in precipitation patterns as summer gives way to fall. With 91 mm (3.6 in) of rainfall over approximately 10 days, this month marks a decrease from the lush, rain-soaked August, which recorded 146 mm (5.8 in) over the same number of days. This transition reflects a typical trend as rainfall levels dip from the peak of the summer months, with September's precipitation aligning more closely with the upcoming autumn months, notably October's 112 mm (4.4 in). The change in precipitation not only signifies the seasonal shift but also influences local flora and fauna, as the region prepares for the cooler, wetter months ahead.
In September, Lambertville experiences a noticeable shift in humidity levels, with the average reading at 66%. This marks a slight increase from the drier summer months of July and August, which saw humidity levels drop to 65% and 62%, respectively. As the warm season transitions into fall, the air begins to retain a bit more moisture, creating a refreshing yet comfortable atmosphere for outdoor activities. Interestingly, this rise in humidity sets the stage for a more significant increase in the following months, culminating in a return to much higher humidity in the late fall and winter, where levels soar back to around 87% by November. This cyclical trend highlights the evolving climate of Lambertville throughout the year, showcasing the delicate balance between warmth and moisture.
As September rolls in Lambertville, the UV Index begins to dip slightly from the summer peak but remains in the very high category at 8, indicating a continued risk of harm from unprotected sun exposure. Residents and visitors should still take precautions, as the burn time is notably short at just 15 minutes. This trend reflects a transition from the intense UV levels experienced during the summer months, where indices soared to 10 in June and July. As autumn approaches, the UV Index will continue to decline, allowing for safer outdoor activities, but vigilance is still key during this time. For those planning outdoor adventures, stay informed about the UV Index by visiting Lambertville UV Index.
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As summer gracefully transitions into fall, September in Lambertville continues to bask in abundant sunshine, boasting 268 hours of glorious daylight. Though slightly less than the sun-kissed zenith of July's impressive 345 hours, September retains a robust light presence that shapes the landscape and invigorates community life. This month reflects a gradual decrease from the high summer months yet stands strong compared to the cooler days of October, which only offers 221 hours. The sunlit days of September serve as a vibrant bridge, inviting residents and visitors alike to enjoy the lingering warmth before the crisp embrace of autumn settles in.
In Lambertville, United States, the likelihood of sunny weather in September is 50%, marking it as one of the more promising months for those seeking clear skies. This month stands out amidst a generally unpredictable year, where months like February and August see significantly less sunshine at just 28% and 31%, respectively. Notably, March and November also offer more sun than average, at 55%, suggesting that late summer and fall have their sunny moments. Despite the dips in summer months, with June peaking at only 36%, September emerges as a solid opportunity for outdoor activities, rounding off the summer with a cheerful balance of sun and warmth.
As summer gently fades into autumn in Lambertville, September presents a notable shift in daylight duration, offering 12 hours of daylight. This month marks a gradual decrease from the peak summer months of June, July, and August, each basking in 14 hours of sunshine. As nature begins its transition, the shortening days signal the approach of fall, bringing cooler temperatures and a rich tapestry of colors to the landscape. Following the vibrant late summer, daylight starts to wane again in October, hinting at winter's early arrival with just 11 hours of daylight. Watching these changes unfold provides a beautiful reminder of nature's cyclical rhythms throughout the year.
As summer fades into fall, September in Lambertville brings a gentle transition in the wind, with average speeds reaching 2.9 m/s (7 mph). This slight uptick from the calmest months of July and August, both at 2.3 m/s (5 mph), suggests a refreshing shift as autumn approaches. Interestingly, September's breezes mirror the more stable averages seen earlier in the year, hinting at a consistent yet gentle airflow that characterizes this time of year. With fall on the horizon, the wind begins to pick up just a notch, promising a more vibrant atmosphere perfect for enjoying the changing leaves and cooler temperatures.
The weather in Lambertville 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 Lambertville and find detailed weather information for every month.
September and January present starkly contrasting weather conditions. In September, temperatures range from a mild minimum of 6°C (42°F) to a warm maximum of 34°C (94°F), with an average of 21°C (70°F). The month sees about 91 mm (3.6 in) of precipitation over 10 days and maintains a humidity level of 66%. In contrast, January brings much harsher cold, with temperatures plummeting to a minimum of -17°C (2°F) and only reaching an average high of 19°C (67°F). The month records less precipitation at 66 mm (2.6 in) over 8 days, but the humidity rises to 87%, creating a damp chill. For a more detailed overview of the conditions, you can check Lambertville weather in January.
In September, the weather features a significant temperature range, with minimums around 6°C (42°F) and maximums soaring up to 34°C (94°F), resulting in an average of 21°C (70°F). The month experiences a moderate amount of precipitation, totaling 91 mm (3.6 in) over about 10 days, and humidity levels average around 66%. In stark contrast, February brings much chillier conditions, with temperatures dipping as low as -16°C (3°F) and only reaching a maximum of 26°C (78°F), leading to a much lower average temperature of 3°C (38°F). This month also sees a slightly higher total precipitation of 108 mm (4.2 in) across 11 days and an increased humidity level of 85%. To learn more about February weather specifics, you can visit Lambertville weather in February.
September and March present contrasting weather experiences. In September, temperatures range from a mild 6°C (42°F) at night to a warm average of 21°C (70°F), peaking at 34°C (94°F), while March's temperatures are significantly lower, with minimums of -14°C (7°F) and an average of only 6°C (43°F), despite a maximum of 28°C (82°F). Precipitation is fairly similar, with September receiving 91 mm (3.6 in) and March slightly higher at 110 mm (4.3 in), with both months experiencing about 10 days of rain. However, March has a notably higher humidity level at 85%, compared to September's 66%. For those interested in more detailed weather patterns for March, you can check out Lambertville weather in March.
When comparing the weather in September and April, we see significant differences in temperature and humidity. September boasts a more comfortable average temperature of around 21°C (70°F), with maxima reaching up to 34°C (94°F), making it a warm month. In contrast, April is generally cooler, with average temperatures around 12°C (53°F) and a minimum of -2°C (28°F). While both months experience precipitation, April sees slightly higher levels at 106 mm (4.2 in) over 12 days, compared to September's 91 mm (3.6 in) over 10 days. Additionally, April has higher humidity levels at 83%, compared to September's 66%. For more detailed information on April weather, visit Lambertville weather in April.
When comparing the weather in September and May, we see distinct differences in temperature and precipitation patterns. September tends to be warmer, with an average temperature of 21°C (70°F) and maximums reaching up to 34°C (94°F), while May has a cooler average temperature of 17°C (63°F) and minimums dropping to 1°C (34°F). In terms of rainfall, May experiences more precipitation at 138 mm (5.4 in) over 14 days, compared to September's 91 mm (3.6 in) over 10 days. Additionally, the humidity in May is slightly higher at 75%, compared to 66% in September. For a closer look at the specifics, you can check Lambertville weather in May.
In comparing the weather of September and June, we observe some notable differences. September generally sees a wider temperature range, with minimums as low as 6°C (42°F) and maximums reaching 34°C (94°F), while June's temperatures start higher, with minimums around 9°C (48°F) and maximums peaking at 35°C (96°F). Precipitation is slightly higher in June, totaling 103 mm (4.0 in) over 12 days compared to September's 91 mm (3.6 in) over 10 days. Additionally, humidity levels are generally more pronounced in June at 73%, in contrast to September's average of 66%. For a detailed look at June weather, check out Lambertville weather in June.
When comparing the weather in September and July, we see distinct differences in temperature and precipitation patterns. September experiences a broader temperature range with minimums dropping to 6°C (42°F) and maximums reaching up to 34°C (94°F), while July remains warmer overall, with minimum temperatures around 13°C (56°F) and maximums peaking at 37°C (98°F).
In terms of precipitation, July is wetter, receiving 145 mm (5.7 in) of rainfall over 14 days, compared to September's 91 mm (3.6 in) over 10 days. Humidity levels are quite similar, with September at 66% and July at 65%. For a closer look at the specific weather conditions, you can check Lambertville weather in July.
In comparing the weather of September to that of August, it's evident that September experiences a notable drop in minimum temperatures, with a low of 6°C (42°F) compared to August's minimum of 13°C (56°F). While both months showcase warm average temperatures, September's average of 21°C (70°F) is slightly cooler than August's 24°C (76°F). Additionally, September sees less precipitation at 91 mm (3.6 in) over 10 days, whereas August has 146 mm (5.8 in) with 14 rainy days, indicating a drier September overall. However, September features slightly higher humidity at 66% compared to August's 62%. For more details on August weather, you can check Lambertville weather in August.
September brings warmer temperatures with an average of 21°C (70°F), while October sees a drop to about 16°C (60°F). The maximum temperature in September can reach a sweltering 34°C (94°F), but October still gets quite warm, peaking at 35°C (95°F). Both months experience significant rainfall, with September recording 91 mm (3.6 in) over 10 days and October seeing a slightly higher total of 112 mm (4.4 in) across 11 days. Additionally, humidity rises in October to 79%, compared to September's 66%. For a more detailed look at the October weather, visit Lambertville weather in October.
September and November present contrasting weather conditions. In September, temperatures range significantly from a mild minimum of 6°C (42°F) to a warm maximum of 34°C (94°F), with an average temperature of 21°C (70°F). The month experiences about 91 mm (3.6 in) of precipitation on roughly 10 days, accompanied by a humidity level of 66%. In contrast, November brings a more pronounced chill, with temperatures dropping to a minimum of -9°C (15°F) and an average of 8°C (46°F), peaking at 25°C (77°F). The precipitation is slightly lower at 83 mm (3.3 in), occurring over 9 days, but humidity rises to 87%. For more detailed insights about November weather, check Lambertville weather in November.
September and December present a marked contrast in weather conditions. In September, temperatures range from a mild 6°C (42°F) at night to a warm peak of 34°C (94°F) during the day, with an average temperature of 21°C (70°F). The month experiences an average of 91 mm (3.6 in) of precipitation over about 10 days, accompanied by a moderate humidity level of 66%. In stark contrast, December offers a much cooler atmosphere, with temperatures dropping to a minimum of -12°C (12°F) and an average of 4°C (39°F), peaking at only 19°C (66°F). This winter month sees slightly higher precipitation at 105 mm (4.1 in) over the same number of days, but with increased humidity at 85%. To learn more about the specific weather conditions in December, check out Lambertville weather in December.
As September rolls in, Lambertville experiences a pleasant transition in weather, with temperatures averaging a comfortable 21°C (70°F), making it significantly milder than the summer's peak heat. The month boasts a mix of warm days and cool nights, allowing outdoor enthusiasts to enjoy the crispness in the air while staying active. However, potential rain is not uncommon, with around 91 mm of precipitation spread across roughly 10 days, highlighting a shift from the drier summer months. The 66% humidity adds to the comfortable yet refreshing atmosphere, making early fall an ideal time to explore the area's natural beauty and vibrant community. For a deeper dive into the weather trends throughout the year, check out Lambertville Climate.