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September Weather in Newmarket, Ireland

Last updated: August 23, 2025

In September, the average temperature in Newmarket, Ireland hovers around 13°C (56°F). Expect a range from a chilly 0°C (33°F) to a warm 25°C (78°F). During this month, anticipate 78 mm (3.1 in) of precipitation over approximately 14 days, alongside a high average humidity of 88%. Stay prepared for a mix of weather conditions!

September Temperature in Newmarket

In September in Newmarket, the average temperature is 13°C (56°F). Maximums can reach 25°C (78°F), while minimums can drop as low as 0°C (33°F). Packing layers is essential for travelers, as you may experience a wide range of temperatures throughout the day.

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

The chart illustrates September temperature patterns in Newmarket, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Newmarket, September typically has an average temperature of 13°C (56°F), with highs reaching up to 25°C (78°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec424343475256595855504644
Data source: Temperature data for Newmarket 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 Newmarket

In Newmarket in September, the precipitation amount is 78 mm (3.1 in) over a period of 14 days.

September Precipitation Trends in Newmarket

The chart displays monthly precipitation patterns in Newmarket, 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 Newmarket, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec6711098677365701067810084114
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Newmarket

In Newmarket in September, humidity is 88%. With an average temperature of 13°C (56°F), this humidity feels like a thick, warm blanket wrapping around you, making outdoor adventures sticky and challenging.

September Average Humidity in Newmarket

This chart illustrates the average monthly humidity levels in Newmarket, 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 Newmarket is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%86%83%83%85%85%88%91%92%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Newmarket

In Newmarket 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 Newmarket.

Maximum UV Index Levels in Newmarket for September

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

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

This table compares monthly weather conditions in Newmarket, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)67 mm (2.6 inches)88%low
February Weather6°C (43°F)110 mm (4.3 inches)88%low
March Weather6°C (44°F)98 mm (3.9 inches)87%moderate
April Weather8°C (47°F)67 mm (2.6 inches)86%moderate
May Weather11°C (52°F)73 mm (2.9 inches)83%high
June Weather13°C (57°F)65 mm (2.6 inches)83%very high
July Weather15°C (60°F)70 mm (2.7 inches)85%very high
August Weather15°C (59°F)106 mm (4.2 inches)85%high
September Weather13°C (56°F)78 mm (3.1 inches)88%moderate
October Weather10°C (51°F)100 mm (3.9 inches)91%moderate
November Weather8°C (46°F)84 mm (3.3 inches)92%low
December Weather7°C (44°F)114 mm (4.5 inches)89%low

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