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September Weather in Bourne, United Kingdom

Last updated: August 27, 2025

In Bourne, United Kingdom, the average temperature for September is a pleasant 15°C (59°F). Expect a wide range, with minimums dipping to 3°C (38°F) and soaring up to 29°C (84°F). During this month, you can anticipate 58 mm (2.3 in) of precipitation spread over about 10 days, accompanied by a high average humidity of 85%.

September Temperature in Bourne

In September in Bourne, the average temperature is 15°C (59°F). The maximum can reach 29°C (84°F), while the minimum can drop as low as 3°C (38°F). This makes it a great time to explore Bourne, as you can enjoy mild weather with a mix of pleasant warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Bourne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bourne, September typically has an average temperature of 15°C (59°F), with highs reaching up to 29°C (84°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec414245485460646359534642
Data source: Temperature data for Bourne 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 Bourne

In Bourne in September, the total precipitation amount is 58 mm (2.3 in), measured over a span of 10 days.

September Precipitation Trends in Bourne

The chart displays monthly precipitation patterns in Bourne, 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 Bourne, September typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec465458366378718058795777
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bourne

In Bourne in September, humidity is 85%. With an average temperature of 15°C (59°F), this humidity feels like a warm, damp blanket wrapping around you, making traveling quite uncomfortable and sticky. Be prepared to take frequent breaks and stay hydrated as you navigate the lush, but humid environment.

September Average Humidity in Bourne

This chart illustrates the average monthly humidity levels in Bourne, 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 Bourne is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%80%81%76%77%85%90%92%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bourne

In Bourne 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 Bourne.

Maximum UV Index Levels in Bourne for September

The chart shows the monthly maximum UV Index (UVI) for Bourne 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 Bourne typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Bourne 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 Bourne Compares to Other Months

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

This table compares monthly weather conditions in Bourne, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)46 mm (1.8 inches)90%low
February Weather6°C (43°F)54 mm (2.1 inches)88%low
March Weather7°C (45°F)58 mm (2.3 inches)86%moderate
April Weather9°C (48°F)35 mm (1.4 inches)84%moderate
May Weather12°C (54°F)63 mm (2.5 inches)80%high
June Weather16°C (61°F)78 mm (3.1 inches)81%very high
July Weather18°C (64°F)71 mm (2.8 inches)76%very high
August Weather17°C (64°F)80 mm (3.2 inches)77%high
September Weather15°C (59°F)58 mm (2.3 inches)85%moderate
October Weather11°C (53°F)79 mm (3.1 inches)90%moderate
November Weather8°C (46°F)57 mm (2.2 inches)92%low
December Weather6°C (43°F)76 mm (3.0 inches)90%low

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