September Weather in Launceston, United Kingdom

Last updated: March 17, 2025

In September, Launceston, United Kingdom experiences a diverse climate, with daytime temperatures reaching a pleasant maximum of 27°C (80°F) while averaging around 14°C (58°F). The month marks a transition into autumn, with nighttime temperatures dipping to a cool minimum of 3°C (37°F). Despite the allure of mild days, residents can expect significant precipitation, accumulating to 79 mm (3.1 in) over approximately 12 days. Coupled with a humidity level of 79%, this month reflects the quintessential English weather, blending warmth with the season's characteristic drizzle.

September Temperature in Launceston

In September, Launceston begins to transition from the warmth of summer to the cooler embrace of autumn. The temperatures range from a minimum of 3°C (37°F) to a pleasant maximum of 27°C (80°F), with an average hovering around 14°C (58°F). This marks a noticeable decline from the summer highs, yet the early autumn days still offer a delightful warmth, inviting outdoor activities amidst the changing foliage. As the month progresses, you can expect crisp mornings and gradually cooling evenings, highlighting the shift in season and setting a picturesque scene for those exploring the scenic beauty of Launceston.

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

The chart illustrates September temperature patterns in Launceston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec424445485359626057534745
Data source: Temperature data for Launceston 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 Launceston

September in Launceston brings a moderate 79 mm (3.1 in) of precipitation, a slight dip from the summer months but still reflective of the region's damp climate. With 12 days of rainfall, the month continues the trend of wet weather typical for this part of the United Kingdom. While September doesn't reach the levels of the wetter October, which averages 120 mm (4.7 in), it maintains a sense of continuity from the 97 mm (3.8 in) rainfall seen in August. The gradual transition into autumn is marked by these patterns, as the days grow shorter and the likelihood of steady rains contributes to the lush greenery that defines Launceston's landscape.

September Precipitation Trends in Launceston

The chart displays monthly precipitation patterns in Launceston, 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.
JanFebMarAprMayJunJulAugSepOctNovDec73989658869691977912092130
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Launceston

As summer gives way to autumn in Launceston, September ushers in a noticeable shift in humidity levels. With a humidity reading of 79%, September marks a transitional period, where moisture in the air begins to decrease from the higher levels experienced in the summer months—70% in July and 73% in August. This reduction hints at the approaching chill of fall, yet it remains relatively comfortable compared to the persistently high humidity of winter, peaking at 90% in November. Overall, September serves as a gentle reminder of the dynamic climate in Launceston, balancing not quite comfortably humid but still pleasant enough to enjoy early autumn activities.

September Average Humidity in Launceston

This chart illustrates the average monthly humidity levels in Launceston, 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.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Launceston

As September rolls in Launceston, the UV Index reflects a high exposure level at 6, which means it's essential to be mindful of sun safety—especially with a burn time of just 25 minutes. This trend follows a summer marked by very high UV readings in June and July, peaking at 9 and 8, respectively. While August saw a slight dip to 7, the consistent high levels over the summer months signify a persistent need for protection against harmful UV rays. As we ease into autumn, remembering to guard against UV exposure remains crucial. For detailed insights, check out the full guide at Launceston UV Index.

Maximum UV Index Levels in Launceston for September

The chart shows the monthly maximum UV Index (UVI) for Launceston 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.
JanFebMarAprMayJunJulAugSepOctNovDec224679876421
Data source: Launceston 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 Launceston

September in Launceston, United Kingdom, offers a delightful transition from the sun-soaked days of summer to the crispness of autumn, boasting an impressive 320 hours of sunshine. While this marks a noticeable dip from July’s peak of 422 hours, it still reflects a robust brightness, surpassing the earlier months of the year. September stands out as the last glimpse of extended daylight before the days shorten significantly, with October bringing only 253 hours. This trend underscores September as a perfect time to enjoy the lingering warmth, making it a cherished month for outdoor activities and vibrant autumnal celebrations.

Monthly Sunshine Duration in Launceston: September Highlighted

The September sunshine duration represents the total number of hours Launceston 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.
JanFebMarAprMayJunJulAugSepOctNovDec98h158h228h353h406h404h422h386h320h253h144h118h
Data source: Launceston September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Launceston During September

In Launceston, the chances of enjoying sunny weather in September stand at a modest 26%, which reflects the transitional nature of early autumn in the United Kingdom. This is slightly lower than the summer months of July and August, where the likelihood of sun peaks at 34% and 27%, respectively. Interestingly, while April boasts the highest chance at 52% among the year, September's numbers highlight a gradual decrease in sunny spells as the days grow shorter and cooler. With October trailing at 19%, it's evident that September offers one last opportunity for sun-seekers before the more overcast months of late autumn arrive.

Percentage of Sunny Days in September in Launceston

The chart illustrates the percentage of sunny days in Launceston 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 Launceston experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec18%22%30%52%29%22%34%27%26%19%23%19%
Data source: Launceston September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Launceston in September

As summer gracefully fades into autumn, September in Launceston, United Kingdom, heralds a notable transition with 12 hours of daylight. This month showcases a gentle decline from the sun-soaked days of summer, where June reached its peak at 16 hours, before settling into the softer, more tranquil light of autumn. In September, daylight begins to wane, yet it still offers richer, longer evenings compared to the forthcoming October and November, both of which retreat to a mere 10 hours and 8 hours of daylight, respectively. This gradual shift not only influences the landscape but also invites a sense of reflection as nature prepares for the colder months ahead.

Average Daylight Hours in Launceston for September

The chart illustrates the variation in daylight duration in Launceston throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 31m10h 2m11h 55m13h 50m15h 31m16h 23m15h 55m14h 25m12h 34m10h 39m8h 56m8h 2m
Data source: Launceston daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Launceston

As September arrives in Launceston, the wind tends to mellow, averaging a gentle 3.3 m/s (7 mph). This marks a decrease from the breezier months of summer, where winds hovered around 3.9 m/s (9 mph) in August. It's a transition towards the autumn chill, as the winds seem to mirror the gradual shift in season. While the gusts pick up again in October at 4.6 m/s (10 mph), September often feels like a pause, inviting residents and visitors alike to savor the last whispers of summer before the winds of fall sweep in.

Average September Wind Speed in Launceston

The chart displays monthly wind speed patterns in Launceston, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.65.64.63.64.63.23.43.93.3 m/s4.63.85.2
Data source: Launceston September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Launceston Compares to Other Months

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

September and January present quite contrasting weather conditions. In September, temperatures range from a minimum of 3°C (37°F) to a comfortable maximum of 27°C (80°F), with an average of 14°C (58°F). The month experiences relatively high humidity at 79% and receives about 79 mm (3.1 in) of precipitation over 12 days. In stark comparison, January sees much colder temperatures, with a minimum of -4°C (25°F) and a maximum reaching only 14°C (57°F), averaging around 6°C (43°F). While January has slightly less precipitation at 73 mm (2.9 in) over the same number of days, it also has a higher humidity level of 88%. For more detailed information on January weather, visit Launceston weather in January.

September and February present distinct weather patterns. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 27°C (80°F), with an average of 14°C (58°F). The month sees a moderate amount of precipitation, totaling 79 mm (3.1 in) over approximately 12 days, accompanied by a humidity level of 79%. In contrast, February is colder, with temperatures dipping as low as -4°C (25°F) and peaking at 16°C (62°F), averaging around 6°C (44°F). This month experiences slightly higher precipitation, totaling 97 mm (3.8 in) across 15 days, and a higher humidity level of 88%. For more insights into February weather, visit Launceston weather in February.

When comparing the weather conditions in September and March, notable differences emerge. September typically enjoys milder temperatures, with a range from a minimum of 3°C (37°F) to a maximum of 27°C (80°F) and an average of 14°C (58°F). In contrast, March experiences cooler temperatures, with a low of -6°C (22°F) and a high of 20°C (67°F), averaging at 7°C (45°F). Precipitation is also a factor, with September receiving 79 mm (3.1 in) over 12 days, while March sees slightly higher precipitation at 96 mm (3.8 in) spread across 17 days. Additionally, humidity levels are higher in March at 86%, compared to 79% in September. For more detailed insights on March weather specifics, you can check Launceston weather in March.

In September, temperatures typically range from a minimum of 3°C (37°F) to a maximum of 27°C (80°F), with an average of 14°C (58°F), making it generally warmer than April. In contrast, April sees a chillier range, with minimum temperatures dropping to -1°C (31°F) and maximums reaching 22°C (72°F), averaging around 9°C (49°F). While September experiences more rainfall with about 79 mm (3.1 in) on around 12 days, April has slightly less precipitation at 58 mm (2.3 in) over 9 days. Additionally, humidity levels are relatively high in both months, with April being at 84% and September at 79%. For a detailed look at what to expect, check Launceston weather in April.

September and May present distinct weather characteristics, each with its own charm. In September, temperatures range from a cool 3°C (37°F) to a warm 27°C (80°F), with an average of 14°C (58°F), making it generally milder than May. However, September experiences slightly more rainfall, with 79 mm (3.1 in) over 12 days, while May sees an average of 86 mm (3.4 in) across 14 days. The humidity levels are closely matched, with September at 79% and May at 80%, suggesting a similar feel in the air during both months. For those interested in a deeper look into May's climate, visit Launceston weather in May.

When comparing the weather in September and June, both months display mild temperatures but with some notable differences. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 27°C (80°F), averaging around 14°C (58°F). Meanwhile, June sees slightly warmer temperatures, with a low of 5°C (42°F) and a high of 28°C (83°F), averaging 15°C (59°F). Precipitation patterns also vary, with September experiencing 79 mm (3.1 inches) over approximately 12 days, compared to June's 96 mm (3.8 inches) across 14 days, highlighting that June tends to be wetter overall. Humidity levels remain similar, with September at 79% and June slightly higher at 80%. For more details on June weather, you can visit Launceston weather in June.

When comparing the weather patterns of September and July, notable differences emerge. September experiences a minimum temperature of 3°C (37°F), an average of 14°C (58°F), and a maximum of 27°C (80°F), alongside a relatively high precipitation level of 79 mm (3.1 in) over approximately 12 days, contributing to a humidity of 79%. In contrast, July tends to be warmer, with minimum temperatures of 7°C (46°F), an average of 16°C (62°F), and a maximum of 28°C (82°F). However, it sees slightly more rainfall, totaling 91 mm (3.6 in) across about 14 days, accompanied by lower humidity at 70%. For a full overview, you can check Launceston weather in July.

In comparing the weather of September and August, September features a broader temperature range with a minimum of 3°C (37°F) and an average of 14°C (58°F), while August's temperatures are slightly warmer, with a minimum of 8°C (47°F) and an average of 16°C (61°F). Both months reach a maximum temperature of 27°C (81°F), but September experiences lower overall humidity at 79% compared to August's 73%. Precipitation is also noteworthy; September has 79 mm (3.1 in) of rain over 12 days, while August sees a higher total of 97 mm (3.8 in) over 16 days. For a more detailed overview of August weather, you can visit Launceston weather in August.

September and October bring notable shifts in weather patterns. In September, temperatures range from a mild 3°C (37°F) to a warm 27°C (80°F), with an average of 14°C (58°F). Precipitation is moderate at 79 mm (3.1 in) over approximately 12 days, accompanied by a humidity level of 79%. In contrast, October sees a drop in temperatures, with minimums reaching -2°C (28°F) and maximums of only 20°C (69°F), averaging around 11°C (53°F). This month experiences increased precipitation at 120 mm (4.7 in) spread over 16 days, while humidity rises to 89%. For more detailed insights, check out Launceston weather in October.

September and November present contrasting weather patterns. In September, temperatures range from a mild 3°C (37°F) at night to a warm 27°C (80°F) during the day, with an average temperature of 14°C (58°F). The month experiences 79 mm (3.1 in) of precipitation over approximately 12 days and a humidity level of 79%. In stark contrast, November sees a drop in temperatures, with minimums reaching -2°C (28°F) and maximums peaking at 16°C (60°F), averaging around 8°C (48°F). This month is also wetter, receiving 92 mm (3.6 in) of rain over 16 days, accompanied by higher humidity at 90%. For more detailed insights, visit Launceston weather in November.

In September, the weather is generally warmer, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 27°C (80°F) and an average of 14°C (58°F). The month sees 79 mm (3.1 in) of precipitation spread over about 12 days, along with a humidity level of 79%. By contrast, December brings cooler temperatures, with a minimum of -2°C (30°F), an average of 7°C (45°F), and a maximum of 13°C (56°F). This month is also wetter, accumulating around 130 mm (5.1 in) of precipitation over 19 days, while humidity rises slightly to 89%. For more detailed insights, you can explore Launceston weather in December.

Compare Launceston's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Launceston

As September unfolds in Launceston, the weather transitions noticeably from the warmer months of summer to the cooler embrace of autumn. With an average temperature of 14°C, the days are still pleasantly mild, yet the crisp mornings hint at the approaching chill. The significant humidity of 79% adds a touch of dampness, complemented by frequent precipitation, averaging 79 mm over about 12 days. This combination creates a refreshing atmosphere that contrasts sharply with the dry and hotter spells earlier in the year. For those keen to explore the nuances of Launceston's climate throughout the year, details can be found at Launceston Climate.