September Weather in Sandwich, United States

Last updated: February 24, 2025

In September, Sandwich, United States experiences a pleasant climate, with daytime temperatures peaking at a comfortable 28°C (82°F) while averaging around 19°C (67°F). As nights draw in, temperatures can dip to a minimum of 11°C (53°F), making for cozy evenings. This month sees 108 mm (4.2 in) of rainfall spread over 10 days, contributing to a humidity level of 75% that adds a touch of freshness to the air. Whether you're enjoying an outdoor activity or simply soaking in the vibrant scenery, September in Sandwich offers a delightful mix of warm days and refreshing breezes.

September Temperature in Sandwich

In September, Sandwich, United States, showcases the gentle transition from summer to fall, with temperatures reflecting a pleasant balance. The minimum temperature rests at a mild 11°C (53°F), while the average climbs to a comfortable 19°C (67°F), peaking at a maximum of 28°C (82°F). This month notably marks a decline from the heat of the previous summer, yet retains enough warmth to allow for outdoor activities. As the days grow shorter and the air turns crisper, September serves as a delightful preview of autumn, inviting residents and visitors alike to enjoy the vibrant landscapes painted in shades of red and gold.

September Weather in Sandwich: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sandwich, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec343639475666737367584739
Data source: Temperature data for Sandwich generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Sandwich

In September, Sandwich, United States, experiences a significant shift in precipitation patterns, with rainfall totaling 108 mm (4.2 in) over 10 days. This marks a notable uptick from the drier summer months, particularly August, which recorded only 78 mm (3.1 in). As autumn approaches, the increased moisture indicates a transition from the relatively dry summer to a wetter fall, setting the stage for October’s even heftier 151 mm (5.9 in). Overall, September acts as a bridge, signaling the onset of the rainy season while maintaining a balanced number of precipitation days, similar to the months preceding it.

September Precipitation Trends in Sandwich

The chart displays monthly precipitation patterns in Sandwich, 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.
JanFebMarAprMayJunJulAugSepOctNovDec8610311212510287917810815193121
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sandwich

As summer transitions to fall in Sandwich, United States, September experiences a notable dip in humidity, settling at 75%—slightly lower than the preceding months of July and August, which hover around 76%. This gradual decrease reflects a broader trend of diminishing humidity levels throughout the late summer and into autumn, with peak humidity occurring in the winter months of January and February, both at a robust 84%. The trend suggests a relief from the summer moisture, paving the way for crisp, comfortable autumn days ahead, while the humidity is expected to rise again as winter approaches. Overall, September balances humidity levels effectively, allowing residents to enjoy the changing seasons with a sense of freshness.

September Average Humidity in Sandwich

This chart illustrates the average monthly humidity levels in Sandwich, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sandwich

As September rolls in Sandwich, the UV Index remains at a lofty 8, placing it in the very high exposure category. This signifies a gradual decline from the peak summer months, yet caution is still advised, with a burn time of just 15 minutes for unprotected skin. The trend throughout the year shows a clear pattern of increasing UV levels from the beginning of spring, reaching a crescendo in June and July, and tapering off as fall approaches. Even though September’s UV Index offers a slight reprieve compared to the scorching summer, sun safety should continue to be a priority. For detailed insights on daily UV levels, visit Sandwich UV Index.

Maximum UV Index Levels in Sandwich for September

The chart shows the monthly maximum UV Index (UVI) for Sandwich 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.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998642
Data source: Sandwich 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 Sandwich

As September arrives in Sandwich, United States, the lingering warmth of summer is beautifully reflected in its 280 hours of sunshine, making it a month of gradual transition. This sunny interlude follows the peak of July and August, which together boast a remarkable 346 and 330 hours respectively, creating a vibrant atmosphere perfect for outdoor pursuits. Yet, September subtly hints at the coming cooler months, as daylight diminishes from the summer highs, but still offers more sunshine than the autumn months that follow, such as October’s 236 hours. This trend showcases September as a sweet summer farewell, where residents and visitors alike can enjoy one last splash of sun before the crisp air of fall sets in.

Monthly Sunshine Duration in Sandwich: September Highlighted

The September sunshine duration represents the total number of hours Sandwich 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.
JanFebMarAprMayJunJulAugSepOctNovDec142h184h258h243h298h326h346h330h280h236h203h165h
Data source: Sandwich September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sandwich During September

As summer fades into the crispness of autumn, September in Sandwich, United States, presents a refreshing shift in weather patterns. With a 47% chance of sunny days, this month offers a notable increase in sunshine compared to the sunniest months of summer, July and August, which plummet to 36% and 32%, respectively. The trend shows a gradual rise in sunny probabilities from the sweltering summer months to the more temperate fall, hinting that September could be an ideal time for outdoor activities. With the likelihood of sunshine outpacing several months earlier in the year, September becomes a delightful bridge between summer warmth and autumn's crisp air, inviting residents and visitors alike to bask in its moderate glow.

Percentage of Sunny Days in September in Sandwich

The chart illustrates the percentage of sunny days in Sandwich 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 Sandwich experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec40%30%59%43%40%38%36%32%47%43%54%29%
Data source: Sandwich September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sandwich in September

As summer fades into fall, September in Sandwich, United States, showcases a transition in daylight duration, offering about 12 hours of sunlight. This month reflects a gradual decrease from the height of summer, where June basked in 15 hours of daylight. Following a peak in May and June, sunlight starts to dwindle, preparing residents for the cozy approach of autumn. After September, daylight continues to decline, dipping back to 11 hours in October, signaling the onset of shorter days as the year winds down. This rhythmic ebb and flow of daylight not only marks the changing seasons but also invites locals to savor those precious hours of sun before winter sets in.

Average Daylight Hours in Sandwich for September

The chart illustrates the variation in daylight duration in Sandwich throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 31m10h 36m11h 58m13h 22m14h 33m15h 8m14h 49m13h 46m12h 25m11h 1m9h 48m9h 11m
Data source: Sandwich daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Sandwich

As September rolls in, Sandwich, United States, witnesses a modest uptick in average wind speed, reaching 4.6 m/s (10 mph). This increase marks a transition from the summer's gentle breezes, which dipped to a low of 3.8 m/s (8 mph) in August, signaling a gradual shift towards the more invigorating winds of autumn. The winds in September begin to prepare the landscape for the vibrant fall foliage, contrasting with the calmness of July and August. Looking ahead, October's winds of 5.1 m/s (11 mph) suggest a consistent pattern of increasing gusts as the seasons change, holding promise for both enthusiasts of outdoor activities and those admiring the crisp air and shifting leaves.

Average September Wind Speed in Sandwich

The chart displays monthly wind speed patterns in Sandwich, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.35.45.55.14.74.94.13.84.6 m/s5.15.05.0
Data source: Sandwich September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Sandwich Compares to Other Months

The weather in Sandwich 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 Sandwich and find detailed weather information for every month.

In September, the weather is notably milder with average temperatures hovering around 19°C (67°F), peaking at a comfortable 28°C (82°F). The month experiences 108 mm (4.2 in) of precipitation over approximately 10 days, with humidity levels at 75%. In contrast, January brings a stark chill, featuring an average temperature of just 1°C (35°F) and nighttime lows dipping to -16°C (3°F). Despite being slightly drier, with 86 mm (3.4 in) of precipitation over 9 days, the humidity rises to 84%. For a closer look at January weather specifics, you can refer to Sandwich 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 28°C (82°F) during the day, with an average of 19°C (67°F). The month sees about 108 mm (4.2 in) of precipitation over 10 days, accompanied by a humidity level of 75%. In contrast, February experiences far colder weather, with minimum temperatures plummeting to -14°C (7°F) and a maximum of only 15°C (59°F), averaging just 2°C (36°F). Though slightly less precipitation at 103 mm (4.1 in) occurs over 12 days, the humidity rises to 84%. For more specifics on February conditions, check out Sandwich weather in February.

When comparing the weather in September and March, it's clear that they present distinct seasonal characteristics. September typically enjoys a milder climate, with temperatures ranging from a minimum of 11°C (53°F) to a maximum of 28°C (82°F) and an average of 19°C (67°F). In contrast, March experiences colder temperatures, with a minimum of -10°C (15°F) and a maximum of 16°C (60°F), leading to an average of only 4°C (39°F). Both months see similar levels of precipitation, approximately 108 mm (4.2 in) in September and slightly more at 112 mm (4.4 in) in March, but March has higher humidity levels at 82% compared to September's 75%. For more detailed insights, you can check Sandwich weather in March.

When comparing the weather in September and April, we see notable differences in temperature and precipitation. September features a milder climate, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 28°C (82°F), while April is cooler, with temperatures averaging between 0°C (32°F) and 21°C (70°F). Both months experience considerable rainfall, but September receives slightly less precipitation at 108 mm (4.2 in) over 10 days, compared to April's 125 mm (4.9 in) over 13 days. Humidity levels are also relatively high in both months, with September at 75% and April slightly higher at 79%. For a detailed look at the weather specifics in April, you can check the following link: Sandwich weather in April.

September and May present unique weather patterns, highlighting the transition between seasons. In September, the temperatures are generally warmer, with averages around 19°C (67°F) and a maximum reaching 28°C (82°F), while May offers a cooler experience, averaging 13°C (56°F) with a minimum of just 4°C (39°F). Both months receive similar levels of precipitation, with September experiencing 108 mm (4.2 in) over about 10 days and May slightly less at 102 mm (4.0 in) over 12 days. Interestingly, both months share a humidity level of 75%, making the air feel quite consistent, but September's warmer averages can make it feel more comfortable. For those interested in exploring May's specific conditions, Sandwich weather in May can provide additional insights.

In comparing the weather between September and June, we observe that both months have similar average temperatures, with September slightly warmer, peaking at 28°C (82°F) compared to June's 28°C (83°F). Interestingly, September has a slightly higher minimum temperature of 11°C (53°F) versus June's 10°C (51°F). Rainfall is more pronounced in September, with 108 mm (4.2 in) over 10 days, whereas June experiences less precipitation at 87 mm (3.4 in) also over 10 days. Additionally, humidity levels are a bit lower in June at 78%, compared to September's 75%. For more detailed insights about June weather, you can check Sandwich weather in June.

When comparing the weather in September and July, it becomes clear that July is generally warmer and drier. In July, temperatures range from a minimum of 15°C (59°F) to a maximum of 34°C (93°F), with an average of 23°C (73°F). In contrast, September sees milder temperatures, with a minimum of 11°C (53°F) and a maximum of 28°C (82°F), averaging 19°C (67°F). Additionally, September experiences more precipitation, totaling 108 mm (4.2 in) over 10 days, compared to July's 91 mm (3.6 in) over just 9 days. Overall, while both months have similar humidity levels around 75-76%, July's conditions are typically hotter and slightly less rainy, making it a quintessential summer month. For a closer look at July weather specifics, visit Sandwich weather in July.

In comparing the weather of September to that of August, we notice a distinct transition. September experiences a lower minimum temperature of 11°C (53°F) compared to August's milder 15°C (60°F), leading to an average temperature drop from 23°C (73°F) in August to 19°C (67°F) in September. Although September has a maximum temperature of 28°C (82°F), which is cooler than August's peak of 32°C (90°F), it compensates with increased precipitation, totaling 108 mm (4.2 in) versus August's 78 mm (3.1 in), both occurring over 10 days. Humidity levels remain similar, with September at 75% and August at 76%. For more detailed information on August weather conditions, you can refer to Sandwich weather in August.

September generally offers warmer temperatures compared to October, with averages around 19°C (67°F) during the day, while October sees a drop to an average of 15°C (59°F). The maximum temperatures in September can reach as high as 28°C (82°F), whereas in October, they peak at 24°C (76°F). Additionally, October experiences slightly more precipitation, with 151 mm (5.9 in) over 11 days compared to September's 108 mm (4.2 in) over 10 days. Both months share the same humidity level of 75%, but the cooler temperatures in October bring a distinct autumn feel. For more specific insights, check out the Sandwich weather in October.

In September, the weather is typically warmer, with average temperatures ranging from 11°C (53°F) at night to a pleasant 28°C (82°F) during the day, accompanied by a high humidity level of 75%. Rainfall is common during this month, with around 108 mm (4.2 in) spread over about 10 days. In contrast, November sees a significant drop in temperatures, with a minimum of -7°C (20°F) and an average of 8°C (47°F), making it feel much chillier. Despite having slightly less rainfall at 93 mm (3.7 in) over the same number of days, the humidity rises to 80%, contributing to a brisk atmosphere. For a detailed look at conditions during this time, you can visit Sandwich weather in November.

September offers a much milder climate with temperatures ranging from a minimum of 11°C (53°F) to a pleasant maximum of 28°C (82°F) and an average of 19°C (67°F). In contrast, December sees a significant drop in temperatures, where the average hovers around 4°C (39°F), with lows plummeting to -13°C (8°F) and highs reaching only 16°C (62°F). Both months experience roughly the same number of rainy days—around ten—but December tends to be slightly wetter with 121 mm (4.8 in) of precipitation compared to September's 108 mm (4.2 in). Humidity levels are comparable as well, with September at 75% and December slightly higher at 80%. For a more detailed look at December’s weather, check Sandwich weather in December.

Compare Sandwich's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Sandwich

As summer fades, September in Sandwich brings a gentle transition into秋, characterized by comfortably warm days and cooler nights. The weather is notably more humid compared to the dry months of summer, resulting in a fresh, soft atmosphere. While September enjoys plenty of sunshine, the increased chance of rainfall—averaging around ten days—adds a refreshing twist to the scenery. This month serves as a delightful balance, making it distinct from both the sweltering heat of summer and the crispness of autumn. Experience the unique allure of September in Sandwich and explore more about its climate here.