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September Weather in Hartley Wintney, United Kingdom

Last updated: August 27, 2025

Average Temperature in Hartley Wintney, United Kingdom during September:

The average temperature hovers around 15°C (59°F), with a minimum of 2°C (37°F) and a maximum reaching 28°C (83°F). Expect 46 mm (1.8 in) of precipitation spread over 9 days, contributing to an average humidity of 82%. Prepare for a mix of breezy and refreshing days!

September Temperature in Hartley Wintney

In September in Hartley Wintney, the average temperature is 15°C (59°F). Maximum temperatures can reach 28°C (83°F), while the minimum can drop to as low as 2°C (37°F). This makes Hartley Wintney a great destination for travelers seeking mild weather, but it's wise to pack layers for varying conditions.

September Weather in Hartley Wintney: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Hartley Wintney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hartley Wintney, September typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (83°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec414345495561656359534643
Data source: Temperature data for Hartley Wintney 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 Hartley Wintney

In Hartley Wintney in September, the precipitation amount is 46 mm (1.8 in) over the course of 9 days.

September Precipitation Trends in Hartley Wintney

The chart displays monthly precipitation patterns in Hartley Wintney, 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 Hartley Wintney, September typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec495461387379687046965786
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hartley Wintney

In Hartley Wintney 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 Hartley Wintney

This chart illustrates the average monthly humidity levels in Hartley Wintney, 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 Hartley Wintney 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 Hartley Wintney

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

Maximum UV Index Levels in Hartley Wintney for September

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

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

This table compares monthly weather conditions in Hartley Wintney, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)49 mm (1.9 inches)91%low
February Weather6°C (43°F)54 mm (2.1 inches)89%low
March Weather7°C (45°F)61 mm (2.4 inches)86%moderate
April Weather9°C (49°F)38 mm (1.5 inches)85%high
May Weather13°C (55°F)72 mm (2.9 inches)79%high
June Weather16°C (61°F)79 mm (3.1 inches)80%very high
July Weather18°C (65°F)68 mm (2.7 inches)71%very high
August Weather17°C (63°F)70 mm (2.7 inches)76%high
September Weather15°C (59°F)46 mm (1.8 inches)82%high
October Weather12°C (53°F)96 mm (3.8 inches)90%moderate
November Weather8°C (46°F)57 mm (2.3 inches)92%low
December Weather6°C (44°F)86 mm (3.4 inches)92%low

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