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September Weather in Graffham, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Graffham, United Kingdom hovers around 15°C (59°F), with a range that can dip to a brisk 3°C (37°F) and peak at a warm 27°C (80°F). Expect about 47 mm (1.9 in) of precipitation spread across 9 days, contributing to an average humidity of 82%. Prepare for a month that balances mild warmth with occasional showers!

September Temperature in Graffham

In September in Graffham, the average temperature is 15°C (59°F). Maximum temperatures can reach 27°C (80°F), while minimums can drop as low as 3°C (37°F). It’s a great time to explore Graffham, so pack for both warm days and cool evenings!

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

The chart illustrates September temperature patterns in Graffham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Graffham, September typically has an average temperature of 15°C (59°F), with highs reaching up to 27°C (80°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec414346495561656359544744
Data source: Temperature data for Graffham 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 Graffham

In Graffham in September, the precipitation amount is 47 mm (1.9 in) spread over a period of 9 days.

September Precipitation Trends in Graffham

The chart displays monthly precipitation patterns in Graffham, 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 Graffham, September typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec525859356576636847936494
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Graffham

In Graffham in September, humidity is 82%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and uncomfortable for travelers.

September Average Humidity in Graffham

This chart illustrates the average monthly humidity levels in Graffham, 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 Graffham is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Graffham

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

Maximum UV Index Levels in Graffham for September

The chart shows the monthly maximum UV Index (UVI) for Graffham 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 Graffham typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Graffham 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 Graffham Compares to Other Months

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

This table compares monthly weather conditions in Graffham, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)52 mm (2.0 inches)91%low
February Weather6°C (43°F)58 mm (2.3 inches)89%low
March Weather8°C (46°F)59 mm (2.3 inches)86%moderate
April Weather9°C (49°F)35 mm (1.4 inches)85%high
May Weather13°C (55°F)65 mm (2.6 inches)79%high
June Weather16°C (61°F)76 mm (3.0 inches)80%very high
July Weather18°C (65°F)63 mm (2.5 inches)71%very high
August Weather17°C (63°F)67 mm (2.7 inches)76%high
September Weather15°C (59°F)47 mm (1.9 inches)82%high
October Weather12°C (54°F)93 mm (3.7 inches)90%moderate
November Weather8°C (47°F)64 mm (2.5 inches)92%low
December Weather7°C (45°F)94 mm (3.7 inches)92%low

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