Last updated: March 17, 2025
September in Dorchester, United Kingdom showcases a delightful transition into autumn, with temperatures ranging from a pleasant maximum of 27°C (81°F) to a cool minimum of 3°C (38°F). The month boasts an average temperature of 15°C (59°F), making it a comfortable time to explore the charming countryside. Although September brings about some rainfall, with a total precipitation of 48 mm (1.9 in) over 9 days, the humidity level hovers around 79%, lending a refreshing touch to the air. It's perfect for enjoying the picturesque landscapes and vibrant local culture while being prepared for the occasional shower.
As September rolls into Dorchester, the transition from summer to autumn becomes clearly evident in the temperatures. With minimums dipping to 3°C (38°F), the region welcomes cooler nights, a refreshing change after the warm summer months. The average temperature settles around 15°C (59°F), providing a comfortable backdrop for outdoor activities and strolls through the scenic countryside. Daytime highs can soar to 27°C (81°F), allowing for a few lingering sunny days before fall fully takes hold. This blend of moderate temperatures not only marks a shift in the seasons but also invites residents and visitors alike to savor the beauty of early autumn in this charming corner of the UK.
September in Dorchester sees a gentle reprieve from the summer's abundance, with precipitation measuring 48 mm (1.9 in) over 9 days. This consistent rainfall marks a slight decline compared to the wetter August, which recorded 78 mm across the month. As autumn approaches, the skies begin to shift, yet September maintains a relatively mild level of rainfall, hinting at a transition rather than an abrupt change. With precipitation trends suggesting a steady rhythm, the arrival of October ushers in a notable increase, ramping up to 106 mm and foreshadowing the wetter months ahead. Overall, September serves as a bridge between the summer warmth and the more temperate, rainier season that follows.
In September, humidity in Dorchester, United Kingdom settles at a moderate 79%, marking a slight increase from the summer months. As the year progresses, there's a noticeable trend: humidity levels begin their ascent after the drier summer, where July and August exhibit lower figures at 70% and 73%, respectively. This dip in summer humidity is gently overshadowed by the onset of autumn, where September's readings hint at the return of the wetter conditions typical of the season. Following this peak, October and November bring even higher humidity levels, climbing back up to 89% and 90%, suggesting that residents can expect a shift towards a more clammy atmosphere as the days shorten and temperatures drop. In sum, September serves as a transitional month where the lingering warmth gradually yields to the characteristic moisture that defines the later part of the year.
As summer transitions into autumn in Dorchester, United Kingdom, the UV Index begins to taper off slightly. In September, the UV Index stands at 6, maintaining a high exposure category, with a burn time of 25 minutes—similar to the peak levels experienced in late summer. This trend reflects a gradual decline from the very high indexes of July and June, when residents needed to be especially cautious about sun exposure. As we move into October with its moderate index of 4, it's clear that while the intensity of UV rays is decreasing, vigilance against sunburn is still essential. For more detailed information about monthly UV levels, visit Dorchester UV Index.
UV Risk Categories
September in Dorchester continues to bask in the soft glow of late summer, offering a commendable 317 hours of sunshine. Although this marks a decline from the peak brilliance of July and August, September still retains a generous amount of sunlight compared to the chillier months ahead. As the days shorten, the town begins transitioning into autumn, inviting residents and visitors alike to savor the lingering warmth of summer while enjoying the rich hues of the changing leaves. This month serves as a gentle reminder that even as summer recedes, the charm of Dorchester remains, making it a delightful time to explore the outdoors before the autumn rains set in.
In Dorchester, United Kingdom, the likelihood of sunny weather in September is relatively modest, with a 30% chance of sunshine. This month typically marks a transitional phase from the vibrant summer days of August, which sees a 29% chance of sun, to the cooler, cloudier conditions of autumn. While September's average isn't the highest of the year, it does show a slight increase compared to the summer months, suggesting opportunities for pleasant, sunny days. In contrast, the more promising weather of April, with its 52% chance of sun, indicates a stark seasonality in Dorchester’s climate. Overall, those hoping to enjoy sunny days in September can expect a balanced mix of cloud and sun, making it a delightful time for outdoor activities.
As the autumnal equinox approaches, September brings a gentle transition in daylight duration to Dorchester, United Kingdom. With an average of 12 hours of daylight, the days start to shorten noticeably after the long, sun-kissed days of summer. Following the peak of 16 hours in June, September experiences a soft decline, echoing the gradual retreat of summer warmth. This month serves as a bridge, blending the vibrant energy of late summer with the more muted tones of early autumn, setting the stage for the cozy evenings that follow in October and beyond. As sunlight dwindles, Dorchester's landscapes begin to reflect the changing season, inviting residents and visitors alike to relish the last golden moments of daylight.
As September arrives in Dorchester, the breeze begins to soften, with average wind speeds dipping to 3.6 m/s (8 mph), a modest continuation of the summer's gentle gusts. This trend reflects a gradual decline from the more boisterous winds of earlier months, particularly August, which recorded a slightly higher average of 4.0 m/s (9 mph). The transition into autumn showcases a shift in the atmosphere, where the winds become calmer, inviting residents to enjoy the fading warmth with refreshing, albeit gentler, currents. This mellow September wind sets the stage for the cooler months ahead, reminding us of the cyclical nature of Dorchester's weather patterns.
The weather in Dorchester 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 Dorchester and find detailed weather information for every month.
September weather is marked by relatively mild temperatures, with minimums around 3°C (38°F) and average highs reaching up to 27°C (81°F). The month experiences some rainfall, with 48 mm (1.9 in) of precipitation over about 9 days, and humidity levels averaging 79%. In contrast, January brings significantly colder conditions, with minimum temperatures dropping to -4°C (25°F) and average highs peaking at just 14°C (57°F). Although the total precipitation slightly increases to 51 mm (2.0 in) over the same number of rainy days, humidity is higher at 88%. For a closer look at January weather specifics, you can check out Dorchester weather in January.
When comparing the weather in September and February, notable differences emerge in temperatures and precipitation patterns. September typically boasts a milder climate, with minimum temperatures around 3°C (38°F) and an average of 15°C (59°F), peaking at 27°C (81°F). With an average of 48 mm (1.9 in) of precipitation over 9 days, humidity remains relatively moderate at 79%. In contrast, February sees significantly colder weather, with minimum temperatures plummeting to -6°C (22°F) and an average of 7°C (44°F), warming up to a maximum of 16°C (61°F). The precipitation increases to 64 mm (2.5 in) spread over 12 days, accompanied by higher humidity at 88%. For a closer look at February's weather, you can visit Dorchester weather in February.
September and March exhibit notable differences in weather patterns. September tends to be warmer, featuring an average temperature of 15°C (59°F), with daytime highs reaching up to 27°C (81°F). In contrast, March is significantly cooler, with average temperatures around 8°C (46°F) and maximums only reaching 19°C (67°F). While September experiences about 48 mm (1.9 in) of precipitation over 9 days, March sees higher rainfall at 73 mm (2.9 in) over 13 days, contributing to a slightly higher humidity of 86%. For a more detailed look at weather specifics for March, you can visit Dorchester weather in March.
In comparing the weather between September and April, September tends to be warmer with an average temperature of 15°C (59°F) and maximums reaching up to 27°C (81°F), whereas April has a cooler average of 10°C (49°F) and highs of 23°C (75°F). Both months experience similar precipitation levels of 48 mm (1.9 in), with September averaging rainfall on 9 days compared to April's 7 days. Humidity is slightly higher in April at 84%, compared to 79% in September. For more details on April conditions, you can visit Dorchester weather in April.
When comparing the weather in September and May, we observe some notable differences. September tends to be warmer, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F), resulting in an average of 15°C (59°F). In contrast, May has slightly cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 24°C (75°F), averaging around 12°C (55°F). Precipitation also differs; September receives 48 mm (1.9 in) over approximately 9 days, while May experiences a higher total of 73 mm (2.9 in) spread across 12 days. Both months have similar humidity levels, at around 79% in September and 80% in May. For more detailed information on May weather, you can check Dorchester weather in May.
When comparing the weather in September and June, we observe notable differences in temperature and precipitation. In September, the minimum temperature is 3°C (38°F), with an average of 15°C (59°F) and a maximum of 27°C (81°F), while June generally experiences warmer temperatures, ranging from a minimum of 7°C (44°F) to a maximum of 29°C (84°F). Both months see considerable humidity, with September at 79% and June slightly higher at 80%. However, June tends to be wetter, with an average precipitation of 76 mm (3.0 in) over 11 days compared to September's 48 mm (1.9 in) over 9 days. For more detailed insights, check out Dorchester weather in June.
In comparing the weather between September and July, it’s clear that July tends to be warmer overall. July boasts an average temperature of 18°C (64°F) with maximums reaching 30°C (86°F) and a relatively mild minimum of 8°C (47°F). In contrast, September experiences a broader range, with minimums dropping to 3°C (38°F) and maximums reaching up to 27°C (81°F), resulting in an average temperature of 15°C (59°F). Additionally, July has slightly less precipitation at 53 mm (2.1 in) over 11 days compared to September's 48 mm (1.9 in) over 9 days, although July is characterized by lower humidity at 70%, compared to September's 79%. For a detailed look at July's weather, you can refer to Dorchester weather in July.
In comparing the weather between September and August, September experiences cooler temperatures, with a minimum of 3°C (38°F) and an average of 15°C (59°F), compared to August's warmer minimum of 8°C (47°F) and an average of 17°C (63°F). The maximum temperatures also reflect this shift, reaching up to 27°C (81°F) in September, while August peaks at 30°C (86°F). Precipitation in September is slightly lower at 48 mm (1.9 in) over 9 days, whereas August sees more rain at 78 mm (3.1 in) across 12 days. Additionally, September has a higher humidity level at 79%, compared to August's 73%. For a closer look at August conditions, visit Dorchester weather in August.
September experiences a milder climate with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F), and an average of 15°C (59°F). The month witnesses relatively low precipitation at 48 mm (1.9 in) over 9 days, accompanied by a humidity level of 79%. In contrast, October presents a noticeable drop in temperature, with lows reaching 0°C (32°F) and a maximum of 21°C (70°F), averaging 12°C (54°F). The rainfall significantly increases to 106 mm (4.2 in) over 14 days, resulting in higher humidity at 89%. This transition highlights October as a wetter and cooler month compared to its predecessor. For more details, you can check Dorchester weather in October.
September weather features a comfortable range of temperatures, with averages around 15°C (59°F) and highs reaching up to 27°C (81°F). The month sees relatively low precipitation, totaling 48 mm (1.9 in) over about 9 wet days and a humidity level of 79%. In contrast, November brings cooler conditions, where temperatures drop to a minimum of -1°C (30°F) and average around 9°C (48°F), with highs peaking at 16°C (61°F). Precipitation increases to 66 mm (2.6 in) over approximately 10 days, and humidity rises to 90%, contributing to a damp atmosphere. For more details, you can check Dorchester weather in November.
In September, the weather is relatively mild, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F). The month sees an average temperature of 15°C (59°F) and experiences about 48 mm (1.9 in) of precipitation over approximately 9 days, contributing to a humidity level of 79%. In contrast, December brings a much cooler climate, with temperatures dipping to a minimum of -3°C (27°F) and averaging around 7°C (46°F), peaking at 14°C (58°F). Precipitation increases to 98 mm (3.9 in) over 14 days, accompanied by a higher humidity of 89%. For more details about December weather, you can visit Dorchester weather in December.
As September unfolds in Dorchester, the weather begins to transition from the warmth of summer to the cooler embrace of autumn. With pleasant daytime temperatures averaging around 15°C (59°F), occasional peaks reaching up to 27°C (81°F) offer a delightful encore of summer's warmth. However, mornings can be brisk, dipping down to 3°C (38°F), reminding us that fall is on the horizon. This month brings a moderate 79% humidity and 48 mm (1.9 in) of rain over approximately 9 days, making it a period of lushness before the leaves start to change. For a deeper understanding of how Dorchester's climate shapes its seasons, visit Dorchester Climate.