September Weather in Glastonbury, United Kingdom

Last updated: March 17, 2025

In Glastonbury, United Kingdom, September showcases a blend of warm and crisp weather, with maximum temperatures reaching a pleasant 29°C (84°F), while the average hovers around 15°C (59°F). This month experiences variable conditions, featuring a minimum temperature of 2°C (36°F). Rainfall contributes to the lush landscape, with 56 mm (2.2 in) of precipitation spread over 9 days, resulting in a humidity level of 79%. Visitors can expect an enchanting yet occasionally damp atmosphere, perfect for exploring the rich history and scenic beauty of this vibrant locale.

September Temperature in Glastonbury

As summer gracefully transitions into autumn, Glastonbury experiences a delightful change in temperatures during September. With minimums around 2°C (36°F) and a pleasant average of 15°C (59°F), the month offers a comfortable escape from the humid warmth of the peak summer. The maximum temperature can reach up to 29°C (84°F), making it one of the last opportunities to enjoy warmer days before the chill of October sets in. This gradual cooling trend not only signifies a shift in seasons but also invites locals and visitors alike to relish in the beautiful, crisp air, making September a truly enchanting time to explore the historic charm of Glastonbury.

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

The chart illustrates September temperature patterns in Glastonbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec424446495461646259544745
Data source: Temperature data for Glastonbury 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 Glastonbury

September in Glastonbury sees a moderate precipitation total of 56 mm (2.2 in), marking a brief respite in rainfall as summer transitions to autumn. With just 9 days of rain, it stands out against the wetter months that precede and follow it, notably August's 80 mm (3.1 in) and October's substantial 106 mm (4.2 in). This relatively low rainfall and fewer precipitation days suggest a trend towards drier weather, allowing residents and visitors alike to enjoy the remnants of summer while preparing for the cooler, wetter months ahead. Overall, September offers a balance in Glastonbury's climate, providing a perfect opportunity to relish the changing seasons.

September Precipitation Trends in Glastonbury

The chart displays monthly precipitation patterns in Glastonbury, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5567764966726880561066694
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Glastonbury

September in Glastonbury, United Kingdom, experiences a typical transition in humidity as summer wanes. With humidity levels settling at 79%, this month marks a gentle dip from the peak summer months, which saw July and August hovering around 70% and 73% respectively. This gradual decrease indicates a shift towards the more stable, cooler weather of autumn. However, as the year progresses, the climate tends to regain its moisture, with October’s humidity rising sharply back to 89%, underscoring Glastonbury's characteristic dampness in the latter part of the year. Overall, the trend reflects a blend of gradual decreases followed by a remarkable return to the high humidity typical of the UK’s fall and winter seasons.

September Average Humidity in Glastonbury

This chart illustrates the average monthly humidity levels in Glastonbury, 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 Glastonbury

As summer fades into autumn, the UV Index in Glastonbury shows a gradual decline, landing at a high level of 6 in September. This marks a transition from the peak summer months of July and August, where UV exposure was very high, necessitating caution with a burn time of just 15 minutes. Although September still requires attention, with a burn time of 25 minutes, the risk of overexposure is lower than in the hotter months. Throughout the year, Glastonbury experiences a spectrum of UV Index levels, ranging from a minimal 1 in January to this summer's peak. It's essential for residents and visitors alike to stay informed about UV exposure to enjoy the beautiful autumn days safely. For more details, check the Glastonbury UV Index.

Maximum UV Index Levels in Glastonbury for September

The chart shows the monthly maximum UV Index (UVI) for Glastonbury 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.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Glastonbury 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 Glastonbury

September in Glastonbury brings a delightful blend of warmth and sunlight, with 286 hours of sunshine that capture the tail end of summer. This month sees a remarkable contrast to the earlier months of the year, with a significant increase from 90 hours in January and even more than 132 hours in November. After the sun-drenched days of July—with a peak of 403 hours—September showcases a gentle dip, yet remains basked in brightness compared to the darker autumn months ahead. As the days gradually shorten, the sun continues to cast its golden glow over Glastonbury, inviting both locals and visitors to savor the last whispers of summer before the cooler months set in.

Monthly Sunshine Duration in Glastonbury: September Highlighted

The September sunshine duration represents the total number of hours Glastonbury 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.
JanFebMarAprMayJunJulAugSepOctNovDec90h141h195h311h384h366h403h353h286h234h132h106h
Data source: Glastonbury September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Glastonbury During September

In Glastonbury, the month of September brings a 26% chance of sunny weather, a slight dip from the summer months but still promising compared to the earlier part of the year. As autumn approaches, September transitions from the more vibrant sunny days of April (53%) and May (36%) to a period where clear skies become less frequent. While the likelihood of sunshine is lower than during the peak summer months of July (38%) and August (27%), it remains more favorable than the chillier, cloudier winters ahead. This trend highlights September as a month where pleasant weather can still surprise, making it a charming time to enjoy Glastonbury's scenic beauty before winter sets in.

Percentage of Sunny Days in September in Glastonbury

The chart illustrates the percentage of sunny days in Glastonbury 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 Glastonbury experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec21%23%30%53%36%26%38%27%26%23%29%21%
Data source: Glastonbury September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Glastonbury in September

As September arrives in Glastonbury, the daylight begins to shift, offering approximately 12 hours of light, a subtle transition from the summer's peak of 16 hours in June and July. This month serves as a gentle reminder of the approaching autumn, as daylight gradually decreases from the more abundant hours of summer. The change is marked by a blend of vibrant fall colors and cooler temperatures, transitioning from the 14 hours seen in August. With each passing day, residents and visitors are treated to cozy evenings, embracing the softer light as the days shorten and prepare for the crispness of October, which brings just 10 hours of daylight.

Average Daylight Hours in Glastonbury for September

The chart illustrates the variation in daylight duration in Glastonbury throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 26m9h 59m11h 55m13h 53m15h 35m16h 29m16h14h 28m12h 34m10h 37m8h 52m7h 56m
Data source: Glastonbury daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Glastonbury

As September unfolds in Glastonbury, the winds take on a gentle demeanor, averaging 3.5 m/s (8 mph)—a slight dip from the bustling breezes of summer. Following the lively gusts of August, which saw a minor uptick in speed, the early autumn air offers a softer caress, inviting moments of reflection as nature transitions. This calm contributes to a gradual trend that marks the arrival of October, where winds pick up again to 4.4 m/s (10 mph). The variability throughout the year illustrates Glastonbury's charming character; it's in September's tranquil winds that one can feel the subtle shift from summer's vibrancy to the serene embrace of autumn.

Average September Wind Speed in Glastonbury

The chart displays monthly wind speed patterns in Glastonbury, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.75.44.63.54.63.33.43.83.5 m/s4.43.84.8
Data source: Glastonbury September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Glastonbury Compares to Other Months

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

September and January exhibit strikingly different weather patterns. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 29°C (84°F), with an average of 15°C (59°F), making it a warm month. The humidity is relatively high at 79%, and there is approximately 56 mm (2.2 in) of precipitation over 9 days. In contrast, January is much colder, with temperatures ranging from -4°C (25°F) to a maximum of 14°C (58°F), averaging around 6°C (42°F). January also experiences higher humidity at 88% and slightly more precipitation, measuring 55 mm (2.2 in) over 11 days. For more details on January weather, check Glastonbury weather in January.

September and February present contrasting weather patterns. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 29°C (84°F), with a comfortable average of 15°C (59°F) and relatively moderate precipitation totaling 56 mm (2.2 in) over 9 days. The humidity also sits at a notable 79%, making it a month that often feels warm and inviting.

In contrast, February experiences much cooler temperatures, with a minimum of -5°C (23°F) and a maximum of 17°C (63°F). The average temperature is a brisk 7°C (44°F), and precipitation is slightly higher at 67 mm (2.6 in), occurring over 13 days. The humidity rises to 88%, contributing to a chilly and damp atmosphere. For more detailed climate insights, check out Glastonbury weather in February.

In September, the weather tends to be warmer, with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 29°C (84°F), and an average temperature of 15°C (59°F). The month experiences moderate rainfall, totaling 56 mm (2.2 in) over about 9 days, with a humidity level of 79%. In contrast, March is significantly cooler, with temperatures ranging from a minimum of -5°C (22°F) to a maximum of 21°C (70°F), and an average temperature of 8°C (46°F). March also sees more rainfall, totaling 76 mm (3.0 in) across approximately 15 days, with a higher humidity of 86%. For more details on what to expect during this time, you can check out Glastonbury weather in March.

When comparing the weather in September and April, distinct differences become apparent. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 29°C (84°F), with an average of 15°C (59°F). The month experiences 56 mm (2.2 in) of precipitation over 9 days and maintains a humidity level of 79%. In contrast, April is cooler overall, with temperatures dipping as low as -3°C (27°F) and peaking at 23°C (73°F), averaging 10°C (50°F). Precipitation in April is slightly lower at 49 mm (1.9 in), also spread across 9 days, but the humidity is a bit higher at 84%. For a deeper look into April weather specifics, you can check Glastonbury weather in April.

In September, temperatures range from a chilly 2°C (36°F) at night to a warm 29°C (84°F) during the day, making it more variable than May, where the temperatures typically span from 1°C (33°F) to a maximum of 26°C (79°F). While both months see significant humidity, September’s average of 79% is quite similar to May’s 80%. Precipitation is slightly higher in May at 66 mm (2.6 in), occurring over 11 days compared to September's 56 mm (2.2 in) over 9 days. This makes May feel a touch wetter despite its warmer overall temperatures. For a detailed look at May's climate, you can check Glastonbury weather in May.

September and June exhibit notable differences in weather patterns, reflecting the transition from summer to autumn. In June, temperatures range from a minimum of 6°C (44°F) to a maximum of 30°C (87°F), with an average temperature of 16°C (61°F). Meanwhile, September features a wider range, with temperatures dipping to a minimum of 2°C (36°F) and peaking at 29°C (84°F), averaging at 15°C (59°F). Rainfall is also more pronounced in June, with 71 mm (2.8 in) of precipitation over 11 days, compared to September's 56 mm (2.2 in) over 9 days. Humidity levels remain relatively high in both months, with September at 79% and June slightly higher at 80%. For a more detailed look at June weather, you can visit Glastonbury weather in June.

When comparing the weather in September to that of July, notable differences emerge. September typically starts off warmly, with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 29°C (84°F) and an average of 15°C (59°F). In contrast, July's temperatures are generally milder, with minimums around 8°C (46°F) and a maximum of 30°C (86°F), averaging at 18°C (64°F). Precipitation is slightly more prevalent in July, with 68 mm (2.7 in) falling over 11 days compared to September's 56 mm (2.2 in) over 9 days. Additionally, September experiences higher humidity levels, averaging at 79%, while July's humidity sits at a more comfortable 70%. For a closer look at July's climate specifics, you can refer to Glastonbury weather in July.

In comparing the weather between August and September, it is evident that September experiences a more significant temperature drop, with minimums dipping to 2°C (36°F) compared to August's 8°C (47°F). The average temperatures in September are also cooler at 15°C (59°F), while August maintains a slightly warmer average of 17°C (63°F). Additionally, September sees a maximum temperature of 29°C (84°F), which is a decrease from the 31°C (88°F) peak in August. Precipitation is notably higher in August, totaling 80 mm (3.1 in) over 13 days, compared to September's 56 mm (2.2 in) over 9 days, though September has slightly higher humidity at 79% versus August's 73%. For more details, check out Glastonbury weather in August.

September and October display notable contrasts in weather conditions. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 29°C (84°F), with an average of 15°C (59°F). This month experiences less precipitation, totaling 56 mm (2.2 in) over 9 days, and has a relative humidity of 79%. In contrast, October sees a drop in temperatures, with lows reaching -1°C (31°F), an average of 12°C (54°F), and highs of 23°C (73°F). This month is also wetter, accumulating 106 mm (4.2 in) of rainfall over 14 days, accompanied by a higher humidity level of 89%. For those interested in more details about the October climate, you can refer to Glastonbury weather in October.

In September, temperatures range from a mild 2°C (36°F) at night to a warm 29°C (84°F) during the day, offering an average of 15°C (59°F). The month sees about 56 mm (2.2 in) of precipitation over approximately 9 days, with humidity levels around 79%. In contrast, November brings significantly cooler temperatures, with nightly lows reaching -2°C (29°F) and daytime highs peaking at 17°C (62°F), culminating in an average of 9°C (48°F). Precipitation increases to 66 mm (2.6 in) over 13 days, and humidity rises to 90%. For more insights into November weather specifics, check out Glastonbury weather in November.

In September, the weather presents a comfortable range, with temperatures varying from a low of 2°C (36°F) to a warm maximum of 29°C (84°F), averaging around 15°C (59°F). Precipitation is moderate at 56 mm (2.2 in) over about 9 days, and humidity levels sit at a relatively pleasant 79%. In contrast, December brings a significant drop in temperature, with a minimum of -2°C (28°F) and a much cooler average of 7°C (45°F), peaking at just 14°C (58°F). The month is wetter, featuring 94 mm (3.7 in) of rain spread over 16 days, and higher humidity at 89%. For a more detailed view of December’s weather, you can check Glastonbury weather in December.

Compare Glastonbury's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Glastonbury

As summer gives way to autumn, September in Glastonbury offers a delightful blend of mild days and cool nights, setting it apart from the balmy months that precede it. With an average temperature around 15°C, it's a time when the warmth of early fall pleasantly contrasts with the briskness of approaching winter. While the total precipitation of 56 mm over nine days may seem significant, the scenery is beautifully vibrant, reflecting the season's transition. Humidity levels hover at a comfortable 79%, ensuring that the air remains refreshing and crisp. For a detailed look at how Glastonbury's September weather fits into the bigger climate picture, check out Glastonbury Climate.