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September Weather in Hartland, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Hartland, United Kingdom is a pleasant 15°C (60°F). Expect a minimum of 10°C (50°F) and a maximum of 23°C (75°F). However, be prepared for some rain, as 112 mm (4.4 in) of precipitation falls over 18 days. With an average humidity of 79%, the air can feel quite damp, so pack accordingly!

September Temperature in Hartland

In September in Hartland, the average temperature is 15°C (60°F), with maximums reaching 23°C (75°F) and minimums dipping as low as 10°C (50°F). This mild weather makes Hartland an ideal destination for travelers seeking comfortable outdoor activities."

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

The chart illustrates September temperature patterns in Hartland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hartland, September typically has an average temperature of 15°C (60°F), with highs reaching up to 23°C (75°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec464646495358626260565148
Data source: Temperature data for Hartland 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 Hartland

In Hartland in September, the precipitation amount is 112 mm (4.4 in) over a span of 18 days.

September Precipitation Trends in Hartland

The chart displays monthly precipitation patterns in Hartland, 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 Hartland, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec1091121075372928399112165140186
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hartland

In Hartland in September, humidity is 79%. With an average temperature of 15°C (60°F), this humidity feels like a warm, enveloping blanket that can make traveling feel muggy and a bit stifling, requiring frequent breaks to stay refreshed and hydrated.

September Average Humidity in Hartland

This chart illustrates the average monthly humidity levels in Hartland, 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 Hartland is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hartland

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

Maximum UV Index Levels in Hartland for September

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

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

This table compares monthly weather conditions in Hartland, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)109 mm (4.3 inches)88%low
February Weather8°C (46°F)112 mm (4.4 inches)88%low
March Weather8°C (47°F)107 mm (4.2 inches)86%moderate
April Weather9°C (49°F)53 mm (2.1 inches)84%high
May Weather12°C (53°F)72 mm (2.8 inches)80%high
June Weather15°C (58°F)92 mm (3.6 inches)80%very high
July Weather16°C (62°F)83 mm (3.3 inches)70%very high
August Weather16°C (62°F)99 mm (3.9 inches)73%high
September Weather15°C (60°F)112 mm (4.4 inches)79%high
October Weather13°C (56°F)165 mm (6.5 inches)89%moderate
November Weather11°C (51°F)140 mm (5.5 inches)90%low
December Weather9°C (49°F)186 mm (7.3 inches)89%low

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