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September Weather in St Anne, Guernsey

Last updated: August 23, 2025

In September, the average temperature in St Anne, Guernsey is a comfortable 16°C (62°F). You'll experience temperatures ranging from a minimum of 12°C (54°F) to a maximum of 21°C (70°F). Be prepared for some rain, as the region receives an average precipitation of 59 mm (2.3 in) over 9 days, accompanied by a humidity level of 79%. 🌧️

September Temperature in St Anne

In September in St Anne, the average temperature is 16°C (62°F). The maximum can reach 21°C (70°F) and the minimum can be as low as 12°C (54°F). This pleasant weather makes St Anne a great destination for travelers seeking comfortable conditions to explore and enjoy outdoor activities.

September Weather in St Anne: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in St Anne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St Anne, September typically has an average temperature of 16°C (62°F), with highs reaching up to 21°C (70°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec484848505357616262595451
Data source: Temperature data for St Anne 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 St Anne

In St Anne in September, the precipitation amount is 59 mm (2.3 in) over the course of 9 days.

September Precipitation Trends in St Anne

The chart displays monthly precipitation patterns in St Anne, 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 St Anne, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec998678335458385459144131170
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in St Anne

In St Anne in September, humidity is 79%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping blanket that makes walking outdoors feel languid and heavy, demanding frequent breaks and plenty of water as you navigate the bustling streets.

September Average Humidity in St Anne

This chart illustrates the average monthly humidity levels in St Anne, 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 St Anne is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%86%85%80%80%69%73%79%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in St Anne

In St Anne 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 St Anne, you can refer to this Hourly UV Index in St Anne.

Maximum UV Index Levels in St Anne for September

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

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

This table compares monthly weather conditions in St Anne, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)99 mm (3.9 inches)90%low
February Weather9°C (48°F)86 mm (3.4 inches)89%moderate
March Weather9°C (49°F)78 mm (3.1 inches)86%moderate
April Weather10°C (50°F)33 mm (1.3 inches)84%high
May Weather12°C (53°F)54 mm (2.1 inches)80%high
June Weather14°C (58°F)58 mm (2.3 inches)80%very high
July Weather16°C (61°F)38 mm (1.5 inches)69%very high
August Weather17°C (63°F)54 mm (2.1 inches)73%high
September Weather16°C (62°F)59 mm (2.3 inches)79%high
October Weather15°C (59°F)144 mm (5.7 inches)89%moderate
November Weather12°C (54°F)131 mm (5.2 inches)92%low
December Weather10°C (51°F)170 mm (6.7 inches)92%low

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