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September Weather in Saint Saviour, Guernsey

Last updated: August 23, 2025

In September, the average temperature in Saint Saviour, Guernsey hovers around 17°C (62°F). Expect a minimum of 12°C (54°F) and a maximum of 21°C (70°F), perfect for enjoying the outdoors. However, be prepared for some rain, as precipitation averages 63 mm (2.5 in) over 9 days. With an average humidity of 76%, it’s a great time to experience the vibrant atmosphere of the season!

September Temperature in Saint Saviour

In September in Saint Saviour, the average temperature is 17°C (62°F). The maximum can reach 21°C (70°F), while the minimum can drop as low as 12°C (54°F). This mild climate makes it an ideal destination for travelers seeking pleasant weather.

September Weather in Saint Saviour: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint Saviour, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Saviour, September typically has an average temperature of 17°C (62°F), with highs reaching up to 21°C (70°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec484849505358616362595451
Data source: Temperature data for Saint Saviour 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 Saint Saviour

In Saint Saviour in September, the total precipitation amount is 63 mm (2.5 in) spread over a duration of 9 days.

September Precipitation Trends in Saint Saviour

The chart displays monthly precipitation patterns in Saint Saviour, 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 Saint Saviour, September typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec988675356058415063144127162
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint Saviour

In Saint Saviour in September, humidity is 76%. With an average temperature of 17°C (62°F), this humidity feels like a warm, enveloping embrace, making travel feel slightly more challenging as it can lead to a sticky discomfort, especially during outdoor excursions.

September Average Humidity in Saint Saviour

This chart illustrates the average monthly humidity levels in Saint Saviour, 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 Saint Saviour is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%85%84%81%77%63%71%76%89%90%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint Saviour

In Saint Saviour in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Saint Saviour, you can refer to this Hourly UV Index in Saint Saviour.

Maximum UV Index Levels in Saint Saviour for September

The chart shows the monthly maximum UV Index (UVI) for Saint Saviour 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 Saint Saviour typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234679876421
Data source: Saint Saviour 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 Saint Saviour Compares to Other Months

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

This table compares monthly weather conditions in Saint Saviour, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)98 mm (3.9 inches)89%low
February Weather9°C (48°F)86 mm (3.4 inches)88%moderate
March Weather9°C (49°F)75 mm (3.0 inches)85%moderate
April Weather10°C (50°F)35 mm (1.4 inches)84%high
May Weather12°C (54°F)60 mm (2.4 inches)81%high
June Weather14°C (58°F)58 mm (2.3 inches)77%very high
July Weather16°C (62°F)41 mm (1.6 inches)63%very high
August Weather17°C (63°F)49 mm (1.9 inches)71%high
September Weather17°C (62°F)63 mm (2.5 inches)76%high
October Weather15°C (59°F)144 mm (5.7 inches)89%moderate
November Weather12°C (54°F)127 mm (5.0 inches)90%low
December Weather11°C (51°F)162 mm (6.4 inches)90%low

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