Last updated: February 24, 2025
September in Great Barrington boasts a vibrant tapestry of weather, with temperatures ranging from a chilly 1°C (34°F) at night to a warm maximum of 31°C (88°F) during the day. The month unravels with an average temperature of 17°C (64°F), perfect for enjoying the early autumn scenery. However, prepare for some rain, as 111 mm (4.4 in) of precipitation graces the region over nine days, contributing to a humidity level of 72%. This blend of warmth and moisture sets the stage for rich fall colors and lush landscapes, making September a captivating time to experience Great Barrington's outdoor charm.
In September, Great Barrington basks in a delightful transition from summer's heat to the crisp embrace of autumn. With average temperatures hovering around 17°C (64°F), residents can enjoy pleasant days where the maximums reach up to 31°C (88°F), fostering activities outdoors. The evenings, however, announce the inevitable arrival of fall, with minimum temperatures dipping to 1°C (34°F). This gentle shift is marked by the vibrant foliage that begins to paint the landscape, inviting both locals and visitors to savor the beauty of nature as it begins to change. Overall, September serves as a beautiful prelude to the cooler months ahead, blending warmth and coolness harmoniously.
In September, Great Barrington experiences a delightful transition as summer fades and autumn approaches, evidenced by 111 mm (4.4 in) of precipitation over 9 days. This month typically sees a slight increase in rainfall compared to the summer's average, giving way to the crispness of fall. Interestingly, September's precipitation is consistent with August's 107 mm (4.2 in), indicating a steady moisture availability as nature prepares for the changing season. Overall, as the region gears up for October's anticipated 152 mm (6.0 in), the gradual shift in precipitation underscores the importance of September as a bridge into the more dynamic weather patterns of autumn.
As summer gives way to autumn in Great Barrington, September experiences a noticeable increase in humidity, rising to 72%. This marks a shift from the drier months of July and August, which recorded 66% and 64% respectively. The trend showcases a gradual reintroduction of moisture into the air, reminiscent of late spring's more humid conditions. As the seasons transition, this uptick not only brings a slight stickiness but also hints at the lush, vibrant fall foliage that thrives in such atmospheric conditions, setting the stage for the picturesque landscapes that Great Barrington is known for.
As summer transitions into fall, September in Great Barrington, United States, maintains a very high UV Index of 8, reflecting a continued need for sun protection. This month mirrors the intensity of late summer, with a burn time of just 15 minutes—shorter than the earlier months in the year. Following peaks of 10 in both May and June, September shows a slight dip yet remains a time when outdoor enthusiasts should be vigilant. With the gradual decrease in UV exposure anticipated in the coming months, such as October's drop to a high index of 6, it's crucial to stay informed about UV levels and enjoy the beautiful early fall days safely. For more details on UV trends throughout the year, visit Great Barrington UV Index.
UV Risk Categories
As summer's warmth gradually transitions into the crispness of fall, September shines in Great Barrington with an impressive 280 hours of sunshine. This month marks a gentle decline from the peak of July and August, which basked in over 320 hours of sunlight each, reflecting the area's vibrant summer allure. Interestingly, September's hours remain significantly higher than the colder months, showcasing a consistent trend of abundant sunshine that begins in spring. As daylight begins to wane in October, the lingering rays of September serve as a delightful reminder of the lively summer days, inviting residents and visitors alike to soak up the last golden hues before autumn’s chill sets in.
In Great Barrington, the likelihood of sunny weather in September stands at a moderate 41%, echoing trends seen in the spring and fall months. As summer transitions into autumn, the percentage of sunny days reflects a stable pattern similar to that of October and notably higher than the peak of summer, particularly July and August, which experience only 34% and 31% sunny chances, respectively. This consistency suggests that while the warm days of summer wane, September offers a delightful balance of sunshine, making it an inviting month for outdoor activities and enjoying the vibrant fall foliage that begins to emerge.
As summer wanes, September in Great Barrington ushers in a gentle decline in daylight, offering about 12 hours of sunlight. This marks a subtle transition from the sun-drenched days of June and July, which basked in 15 and 14 hours respectively. The gradual decrease in daylight hours is a precursor to autumn, setting the stage for vibrant foliage as we move toward fall. In this month, the balance of light and shadow invites a reflective mood, reminding us that the warm, long days of summer are giving way to the crispness of October, where daylight further dwindles to 11 hours. Each season unfolds its unique charm, with September striking a harmonious balance as nature prepares for the shifts ahead.
As September rolls into Great Barrington, the winds begin to pick up slightly, averaging 3.0 m/s (7 mph). This subtle increase marks a transition from the calmer breezes of summer, where July and August both languished at 2.5 m/s (6 mph). Interestingly, September's wind speed remains consistent with October, indicating a gentle yet dependable shift as the seasons change. This trend suggests that while summer's stillness dissipates, autumn brings a refreshing breath of air, continuing the tradition of fluctuating breezy conditions that define the region's character throughout the year.
The weather in Great Barrington 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 Great Barrington and find detailed weather information for every month.
In September, temperatures range from a chilly 1°C (34°F) at night to a warm 31°C (88°F) during the day, with an average of 17°C (64°F). The month experiences about 111 mm (4.4 in) of precipitation over 9 days, accompanied by a humidity level of 72%. In contrast, January is characterized by significantly colder weather, with temperatures dipping as low as -25°C (-13°F) and peaking at 16°C (61°F), averaging -4°C (26°F). The precipitation in January is somewhat lower at 81 mm (3.2 in), also spread across 9 days, but the humidity is higher at 89%. For more detailed information about January weather, you can check out Great Barrington weather in January.
September and February present stark contrasts in weather patterns. In September, temperatures range from a minimum of 1°C (34°F) to a maximum of 31°C (88°F), with an average of 17°C (64°F) and humidity at 72%. The month experiences about 111 mm (4.4 in) of precipitation over 9 days. In contrast, February is much colder, with temperatures falling between a minimum of -24°C (-10°F) and a maximum of 21°C (70°F), averaging -2°C (29°F). The month sees slightly less precipitation at 98 mm (3.9 in) across 12 days and higher humidity at 88%. For a detailed overview of February weather patterns, check out Great Barrington weather in February.
The weather in September contrasts significantly with that of March. In September, temperatures range from a chilly 1°C (34°F) to a warm 31°C (88°F), with an average of 17°C (64°F), making it a more temperate month overall. Conversely, March experiences much cooler temperatures, with a minimum of -18°C (-1°F) and a maximum of 22°C (72°F), averaging just around 1°C (34°F). Additionally, September sees higher precipitation at 111 mm (4.4 in) over 9 days, while March has slightly less at 87 mm (3.4 in) over 11 days, contributing to increased humidity levels in March at 86%, compared to September's 72%. For more detailed insights, check out Great Barrington weather in March.
September and April present distinct weather contrasts, particularly in temperature and precipitation patterns. In September, temperatures range from a cool minimum of 1°C (34°F) to a comfortable maximum of 31°C (88°F), with an average of 17°C (64°F), reflecting the transition into autumn. In contrast, April experiences a chillier minimum of -6°C (22°F) and a higher average of 8°C (46°F), peaking at 28°C (82°F). Both months see considerable rainfall, with September receiving 111 mm (4.4 in) over 9 days, while April has slightly more precipitation at 132 mm (5.2 in) over 14 days, indicating wet conditions. Humidity is higher in April at 84%, compared to September’s 72%. For a detailed look at how April weather unfolds, you can check out Great Barrington weather in April.
In comparing the weather conditions of September and May, September boasts warmer average temperatures, ranging from a minimum of 1°C (34°F) to a maximum of 31°C (88°F), while May experiences slightly cooler temperatures, with a minimum of -1°C (30°F) and a maximum reaching 32°C (89°F). Both months see significant precipitation, with September receiving 111 mm (4.4 in) over 9 days and May slightly higher at 115 mm (4.5 in) spread across 14 rainy days. Humidity levels are also comparable, with September at 72% and May slightly higher at 76%. For more details on May's weather patterns, visit Great Barrington weather in May.
September and June offer distinct weather experiences, with September displaying a wider temperature range. In September, temperatures can dip to 1°C (34°F) at night but can reach up to 31°C (88°F) during the day, with an average of 17°C (64°F). The month also sees significant rainfall, averaging 111 mm (4.4 in) over approximately 9 days, while humidity remains consistent at 72%. Conversely, June tends to be slightly warmer overall, with a minimum temperature of 4°C (40°F) and a maximum of 33°C (91°F), averaging 19°C (66°F). Rainfall is less abundant, with 85 mm (3.4 in) expected over about 12 days, also with 72% humidity. For further details, check out Great Barrington weather in June.
When comparing the weather in September and July, we see notable differences in temperature and precipitation. September features a wider temperature range, with minimums dropping to around 1°C (34°F) and maximums reaching up to 31°C (88°F), while July maintains milder lows of 10°C (51°F) and highs peaking at 34°C (93°F). Additionally, September experiences more rainfall, accumulating 111 mm (4.4 in) over about 9 days, compared to July’s 136 mm (5.4 in) across 13 days. Humidity levels also vary slightly, with September being more humid at 72%, contrasting with July's 66%. For a closer look at July weather specifics, you can check out Great Barrington weather in July.
In comparing the weather of September to August, we see some intriguing contrasts. September experiences a broader temperature range, with minimums dropping to 1°C (34°F) and maximums reaching 31°C (88°F), while August maintains warmer temperatures, ranging from 9°C (48°F) at night to a peak of 33°C (91°F). Interestingly, September also sees slightly more precipitation, totaling 111 mm (4.4 inches) over 9 days, compared to August's 107 mm (4.2 inches) across 11 days. Additionally, humidity levels rise in September to 72%, compared to August’s 64%. This shift in weather suggests a transition as summer wanes, marked by cooler nights and increased moisture. For a more detailed look at August conditions, you can visit Great Barrington weather in August.
September weather in Great Barrington tends to be warmer, with average temperatures around 17°C (64°F) and highs reaching up to 31°C (88°F). However, it is also relatively humid, with 72% humidity and significant rainfall of 111 mm (4.4 inches) over about 9 days. In contrast, October sees a notable drop in temperatures, with an average of 11°C (53°F) and nighttime lows dipping to -7°C (19°F). The precipitation increases as well, totaling 152 mm (6.0 inches) across 12 days, and humidity rises to 81%. For more details on October weather, you can visit Great Barrington weather in October.
September and November present distinct contrasts in weather patterns. In September, temperatures are relatively warm with a minimum of 1°C (34°F) and an average of 17°C (64°F), peaking at a maximum of 31°C (88°F). Despite having substantial precipitation of 111 mm (4.4 in) over 9 days, the humidity sits at a moderate 72%. In stark contrast, November features a much colder climate, with minimum temperatures dropping to -21°C (-5°F) and an average of only 4°C (39°F), while the maximum reaches 22°C (72°F). Precipitation is slightly lower at 101 mm (4.0 in) over 11 days, accompanied by increased humidity at 87%. For more detailed insights, visit Great Barrington weather in November.
September and December present stark contrasts in weather. September enjoys a mild climate with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 31°C (88°F), and an average of 17°C (64°F). The month sees about 111 mm (4.4 in) of precipitation over 9 days and maintains a humidity level of 72%. In contrast, December experiences chilly conditions, with temperatures dipping as low as -21°C (-5°F), reaching an average of -1°C (30°F) and peaking at 15°C (59°F). It also has slightly increased precipitation at 113 mm (4.4 in) but over 11 days, accompanied by higher humidity at 84%. To learn more about how December weather unfolds, check out Great Barrington weather in December.
September in Great Barrington showcases a distinct transition, where cooler temperatures emerge alongside lingering warmth. Unlike the summer months, this month strikes a perfect balance with its refreshing average temperatures and occasional chilly nights. While rainfall is quite moderate, it does add a touch of freshness, contributing to the vibrant scenery of early autumn. With a humidity level that feels comfortable rather than oppressive, September invites residents and visitors alike to embrace the beauty of nature's shift. For a deeper look into the region's unique climate patterns, check out Great Barrington Climate.