nomadseason

September Weather in Deganwy, United Kingdom

Last updated: August 27, 2025

In Deganwy, United Kingdom, the average temperature in September hovers around 14°C (57°F), with a minimum dipping to 3°C (37°F) and a maximum soaring to 27°C (81°F). Expect 96 mm (3.8 in) of precipitation over approximately 15 days, contributing to a high average humidity of 85%.

September Temperature in Deganwy

In September, in Deganwy, the average temperature is 14°C (57°F). Maximum temperatures can reach 27°C (81°F), while minimums can drop as low as 3°C (37°F). This pleasant variability makes it an ideal time for travelers to explore the outdoor attractions and enjoy the local scenery.

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

The chart illustrates September temperature patterns in Deganwy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deganwy, September typically has an average temperature of 14°C (57°F), with highs reaching up to 27°C (81°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344485358616057524643
Data source: Temperature data for Deganwy 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 Deganwy

In Deganwy in September, the precipitation amount is 96 mm (3.8 in) over the course of 15 days.

September Precipitation Trends in Deganwy

The chart displays monthly precipitation patterns in Deganwy, 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. In Deganwy, September typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec71929656719992969610791115
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Deganwy

In Deganwy in September, humidity is 85%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and sluggish.

September Average Humidity in Deganwy

This chart illustrates the average monthly humidity levels in Deganwy, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Deganwy is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%85%79%81%78%79%85%90%91%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Deganwy

In Deganwy in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Deganwy.

Maximum UV Index Levels in Deganwy for September

The chart shows the monthly maximum UV Index (UVI) for Deganwy 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. In September, the maximum UV index in Deganwy typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Deganwy 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.

How September Weather in Deganwy Compares to Other Months

Weather in Deganwy varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Deganwy, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Deganwy, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)71 mm (2.8 inches)89%low
February Weather6°C (43°F)92 mm (3.6 inches)88%low
March Weather7°C (44°F)96 mm (3.8 inches)86%moderate
April Weather9°C (48°F)56 mm (2.2 inches)84%moderate
May Weather12°C (53°F)71 mm (2.8 inches)79%high
June Weather15°C (59°F)99 mm (3.9 inches)81%very high
July Weather16°C (61°F)92 mm (3.6 inches)78%very high
August Weather16°C (60°F)96 mm (3.8 inches)79%high
September Weather14°C (57°F)96 mm (3.8 inches)85%moderate
October Weather11°C (52°F)107 mm (4.2 inches)90%moderate
November Weather8°C (47°F)91 mm (3.6 inches)91%low
December Weather6°C (44°F)115 mm (4.5 inches)89%low

Compare Deganwy's Climate with Cities Worldwide