September Weather in Manchester-by-the-Sea, United States

Last updated: February 24, 2025

September in Manchester-by-the-Sea offers a delightful blend of temperatures and refreshing coastal breezes. With a maximum temperature reaching 26°C (80°F) and an average hovering around 18°C (65°F), visitors can expect pleasantly mild days. The month sees a minimum temperature of 11°C (53°F), making for crisp evenings ideal for cozy gatherings. While precipitation can total up to 97 mm (3.8 in) over 8 days, the humidity remains a comfortable 71%, contributing to the charming, refreshing ambiance. This perfect mix of weather conditions invites locals and tourists alike to embrace outdoor activities and explore the scenic beauty of this coastal gem.

September Temperature in Manchester-by-the-Sea

As September arrives in Manchester-by-the-Sea, the summer warmth gradually begins to wane, welcoming the onset of fall. The month showcases a comforting range of temperatures, with minimums averaging around 11°C (53°F) and maximums peaking at 26°C (80°F). This delightful balance results in an average temperature of 18°C (65°F), providing ideal conditions for outdoor activities and coastal strolls. Compared to the sweltering heights of July and August, September offers a refreshing respite, marked by crisper air and cooler evenings, making it a perfect time for locals and visitors alike to savor the beauty of the transition into autumn.

September Weather in Manchester-by-the-Sea: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Manchester-by-the-Sea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec333437445361697065574537
Data source: Temperature data for Manchester-by-the-Sea generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Manchester-by-the-Sea

In September, Manchester-by-the-Sea experiences a notable shift in precipitation patterns, with 97 mm (3.8 in) of rain spread over just 8 days, indicating a balance between dry spells and necessary downpours. This month's rainfall is a slight uptick compared to August's 62 mm, suggesting a return of wetter conditions as summer gives way to fall. While September's precipitation is lower than the more substantial October average of 177 mm, it still plays a crucial role in replenishing local ecosystems. As the days grow shorter and temperatures begin to cool, this moderate rainfall sets the stage for the vibrant autumn foliage that the region is famous for.

September Precipitation Trends in Manchester-by-the-Sea

The chart displays monthly precipitation patterns in Manchester-by-the-Sea, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec92118111165104901056297177116150
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Manchester-by-the-Sea

As summer fades into fall, September humidity in Manchester-by-the-Sea settles at a comfortable 71%, a slight increase from the more arid August levels of 66%. This subtle rise marks a transition as the warm season gives way to cooler temperatures, providing a refreshing change without overwhelming the atmosphere. Throughout the year, humidity levels have shown a notable pattern: they peak during the winter months, hovering around 86% in January, and gradually decline to their lowest in the summer, particularly in July and August. As autumn approaches, humidity levels begin to climb again, setting the stage for the wetter months ahead.

September Average Humidity in Manchester-by-the-Sea

This chart illustrates the average monthly humidity levels in Manchester-by-the-Sea, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Manchester-by-the-Sea

As September arrives in Manchester-by-the-Sea, the UV Index reflects a shift towards high levels of sun exposure, registering at 7. This marks a slight decline from the peak summer months, where UV Index levels reached 9 and 10, indicating very high exposure risk. With a burn time of just 25 minutes, it’s crucial for residents and visitors to remain vigilant, especially during mid-day hours. The September sun brings the opportunity for enjoyable outdoor activities, but it's essential to balance this with adequate sun protection to minimize skin damage. As fall approaches, this month serves as a reminder of the lingering summer sun, encouraging everyone to embrace safety measures. For detailed updates throughout the year, visit the Manchester-by-the-Sea UV Index.

Maximum UV Index Levels in Manchester-by-the-Sea for September

The chart shows the monthly maximum UV Index (UVI) for Manchester-by-the-Sea in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997642
Data source: Manchester-by-the-Sea September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Manchester-by-the-Sea

September in Manchester-by-the-Sea brings a beautiful transition as the summer warmth lingers with 280 hours of sunshine. This month showcases a notable decline from the sun-drenched July and August, which boast an impressive 340 hours each, yet it still surpasses the earlier months of the year. The gradual decrease hints at the approach of fall, as the sun's embrace gives way to the crispness of October, which offers 228 hours. The overall trend reflects a seasonal rhythm, where the vibrant summer days gradually cede to the gentle light of autumn, inviting residents and visitors alike to enjoy the tranquil charm of this coastal town before the winter months set in.

Monthly Sunshine Duration in Manchester-by-the-Sea: September Highlighted

The September sunshine duration represents the total number of hours Manchester-by-the-Sea experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec152h188h255h244h295h330h340h330h280h228h202h176h
Data source: Manchester-by-the-Sea September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Manchester-by-the-Sea During September

In September, the likelihood of sunny weather in Manchester-by-the-Sea begins to rise, offering a 46% chance of sunshine, making it one of the more favorable months for blue skies. This increase follows a pattern where summer months like July and August dip to 34% and 32%, respectively, indicating that the sunny spells are less frequent during peak summer. As autumn approaches, the chance of sun sees a slight uptick compared to the summer. Overall, while September remains relatively moderate in sun exposure, it suggests a promising transition into the fall, where sunnier days become more common again, peaking with a 55% chance in November.

Percentage of Sunny Days in September in Manchester-by-the-Sea

The chart illustrates the percentage of sunny days in Manchester-by-the-Sea throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Manchester-by-the-Sea experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec41%34%61%42%39%41%34%32%46%39%55%31%
Data source: Manchester-by-the-Sea September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Manchester-by-the-Sea in September

As summer fades into autumn, September brings a gradual decline in daylight hours in Manchester-by-the-Sea, offering about 12 hours of sunlight. This shift is part of a broader trend observed throughout the year, where daylight peaks in June with 15 hours before slowly tapering off. May and June enjoy extended evenings, encouraging outdoor activities, while July and August begin the slow descent toward shorter days. As September rolls in, the community can savor the lingering warmth of summer days, even as nature's clock signals that shorter evenings are on the horizon, a gentle reminder of the impending seasonal changes.

Average Daylight Hours in Manchester-by-the-Sea for September

The chart illustrates the variation in daylight duration in Manchester-by-the-Sea throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 26m10h 33m11h 57m13h 24m14h 37m15h 14m14h 54m13h 49m12h 26m10h 59m9h 44m9h 5m
Data source: Manchester-by-the-Sea daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Manchester-by-the-Sea

As September graces Manchester-by-the-Sea, the winds begin to shift, signaling a transition from the balmy summer months. With an average wind speed of 5.0 m/s (11 mph), September's breezes are a gentle sigh compared to the stronger gusts of earlier months. The trend shows a gradual decline from the summer lull, where winds dipped to their lowest in July and August. However, this slight uptick from the summer's calm brings a refreshing crispness to the air, hinting at the invigorating fall season ahead. The winds will soon pick up again in October, creating a dynamic landscape where the playful whispers of September foretell the bolder voices of autumn.

Average September Wind Speed in Manchester-by-the-Sea

The chart displays monthly wind speed patterns in Manchester-by-the-Sea, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.66.46.75.65.45.14.44.35.0 m/s5.96.06.1
Data source: Manchester-by-the-Sea September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Manchester-by-the-Sea Compares to Other Months

The weather in Manchester-by-the-Sea 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 Manchester-by-the-Sea and find detailed weather information for every month.

When comparing the weather in September and January, notable differences emerge. September boasts milder temperatures, with averages around 18°C (65°F) and maximums reaching 26°C (80°F), while January experiences a significant drop, averaging just 1°C (33°F) and maxing out at 15°C (59°F). Precipitation levels are relatively similar, with September recording 97 mm (3.8 in) over 8 days, compared to January's 92 mm (3.6 in) over 9 days. Additionally, January's humidity is higher at 86%, contrasted with September's more moderate 71%. For further details about January weather, you can check Manchester-by-the-Sea weather in January.

September and February present starkly contrasting weather conditions. In September, temperatures range from a mild 11°C (53°F) at night to a warm average of 18°C (65°F), peaking at 26°C (80°F) during the day. The month sees an average of 97 mm (3.8 in) of precipitation over about 8 days, with a humidity level of 71%, creating a comfortable yet slightly humid atmosphere.

Conversely, February is marked by much colder temperatures, with nightly lows plunging to -14°C (8°F) and daytime highs averaging around 1°C (34°F), reaching a maximum of 12°C (55°F). Precipitation is more frequent in February, totaling 118 mm (4.6 in) over approximately 11 days, and the humidity rises to 84%, contributing to a chillier and damp sensation. For more details on February weather, you can follow this link: Manchester-by-the-Sea weather in February.

September and March exhibit strikingly different weather patterns. September typically enjoys milder temperatures, with an average of 18°C (65°F) and highs reaching up to 26°C (80°F), whereas March experiences much colder conditions, averaging just 3°C (37°F) with maximum temperatures of 14°C (57°F). While September has a total precipitation of 97 mm (3.8 in) spread over about 8 days, March sees slightly more rain at 111 mm (4.4 in) over approximately 11 days. Additionally, humidity levels in March can be higher, averaging at 82%, compared to September's 71%. For more details on the weather in March, you can visit Manchester-by-the-Sea weather in March.

When comparing the weather in September and April, a noticeable contrast emerges. September typically enjoys milder temperatures, with averages around 18°C (65°F) and highs reaching 26°C (80°F), whereas April tends to be cooler, averaging just 7°C (45°F) and experiencing occasional lows below freezing. Additionally, September sees less precipitation, averaging 97 mm (3.8 in) over 8 days, compared to April's 165 mm (6.5 in) across 13 days. The humidity is slightly lower in September at 71%, while April experiences higher humidity levels at 80%. For more detailed information on April weather, you can check Manchester-by-the-Sea weather in April.

When comparing the weather in September and May, notable differences emerge in temperature and precipitation patterns. September typically enjoys milder temperatures with a minimum of 11°C (53°F) and a maximum of 26°C (80°F), averaging around 18°C (65°F). In contrast, May starts cooler, with a minimum of 4°C (39°F) and a maximum of 22°C (72°F), averaging only 11°C (53°F). While both months experience significant rainfall, September sees around 97 mm (3.8 in) over approximately 8 days, whereas May has slightly more precipitation at 104 mm (4.1 in) over 10 days. Humidity levels are quite similar, with September at 71% and May at 72%. For more specific details on the weather in May, you can check Manchester-by-the-Sea weather in May.

In comparing the weather between September and June, both months feature similar maximum temperatures, reaching around 26°C (79°F). September, however, enjoys a slightly higher average temperature of 18°C (65°F) compared to June's 16°C (62°F). Precipitation levels are fairly comparable, with September receiving 97 mm (3.8 in) over 8 days, while June records 90 mm (3.6 in) over 9 days, resulting in just a marginally wetter early fall. Both months also exhibit high humidity, with September at 71% and June at 72%. For more detailed insights into June's weather, you can refer to Manchester-by-the-Sea weather in June.

In comparing the weather of September to that of July, we see a noticeable shift in temperatures and precipitation patterns. September experiences a lower minimum temperature of 11°C (53°F) and a maximum of 26°C (80°F), with an average temperature of 18°C (65°F), while July is warmer overall, with a minimum of 15°C (59°F), an average of 20°C (69°F), and a peak temperature of 28°C (83°F). Additionally, September brings slightly more rainfall, with 97 mm (3.8 in) over 8 days, compared to July's 105 mm (4.1 in) over 11 days. Humidity levels are relatively similar, with September at 71% and July at 67%. For those interested in more specific details about July weather, you can check Manchester-by-the-Sea weather in July.

In comparing the weather between September and August, it’s evident that September experiences a notable drop in temperatures, with minimums of 11°C (53°F) and averages around 18°C (65°F), compared to August's warmer minimum of 16°C (60°F) and an average of 21°C (70°F). While September boasts a maximum temperature of 26°C (80°F), it is slightly cooler than August's peak of 28°C (82°F). Additionally, September sees increased precipitation, accumulating 97 mm (3.8 in) over the month, compared to August's 62 mm (2.5 in), although both months share the same number of rainy days at 8. Humidity levels also rise in September, averaging 71% compared to August's 66%. For more detailed information, visit Manchester-by-the-Sea weather in August.

September and October showcase a significant shift in weather patterns. In September, temperatures range from a mild minimum of 11°C (53°F) to a high of 26°C (80°F), with an average of 18°C (65°F). The month experiences moderate precipitation of 97 mm (3.8 in) over about 8 days, accompanied by a relatively comfortable humidity level of 71%.

Conversely, October brings cooler temperatures, with a minimum dipping to 3°C (37°F) and an average of 14°C (57°F), peaking at 22°C (72°F). Precipitation increases to 177 mm (7.0 in) spread over 12 days, and humidity rises slightly to 78%. The transition from September to October highlights the progression from the warmth of early fall into the chillier and wetter conditions typical of late autumn. For more detailed insights, you can check out Manchester-by-the-Sea weather in October.

September and November exhibit markedly different weather patterns. September enjoys milder temperatures, with averages around 18°C (65°F) and highs reaching up to 26°C (80°F), making it a more pleasant month overall. In contrast, November sees a significant drop in temperature, with averages around 7°C (46°F) and nighttime lows plunging to -9°C (16°F). Additionally, November tends to be wetter, with 115 mm (4.5 in) of precipitation over 11 days, compared to September's 97 mm (3.8 in) over just 8 days. The humidity also rises in November, reaching 84%, compared to 71% in September. For more detailed information, check out Manchester-by-the-Sea weather in November.

September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 11°C (53°F) at night to a pleasant average of 18°C (65°F) during the day, peaking at a warm 26°C (80°F). The month sees around 97 mm (3.8 in) of precipitation over approximately 8 days, with humidity levels at 71%. In contrast, December experiences much colder temperatures, with lows plunging to -16°C (4°F) and an average high of only 14°C (58°F). This month brings even more precipitation at 150 mm (5.9 in) over about 10 days, accompanied by increased humidity at 81%. For a more detailed look at December's weather, visit Manchester-by-the-Sea weather in December.

Compare Manchester-by-the-Sea's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Manchester-by-the-Sea

As September unfolds in Manchester-by-the-Sea, the weather often delivers a delightful mix of warmth and coastal breezes, making it a standout month compared to the more extreme conditions of summer and the crispness of fall. With an average temperature hovering around a comfortable 18°C (65°F), the transition from the heat of summer becomes gently apparent, inviting locals and visitors alike to enjoy outdoor activities before the chill sets in. While rainfall occurs on an average of 8 days, the overall humidity lingers at a moderate 71%, creating a refreshing atmosphere. This harmonious blend of sun and occasional showers sets September apart, making it an ideal time to experience the charm of this coastal town. For a deeper dive into the region's weather patterns, check out Manchester-by-the-Sea Climate.