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September Weather in Irvine, United Kingdom

Last updated: August 27, 2025

In Irvine, United Kingdom, the average temperature in September hovers around 13°C (56°F). You can expect a minimum of 7°C (44°F) and a maximum reaching 24°C (75°F). With an average precipitation of 144 mm (5.7 in) over 20 days, the air feels quite humid, boasting an average humidity of 88%.

September Temperature in Irvine

In September in Irvine, the average temperature is 13°C (56°F). Maximum temperatures can reach 24°C (75°F), while minimum temperatures can drop as low as 7°C (44°F). This mild climate makes it a perfect time for travelers to explore the area's natural beauty and attractions.

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

The chart illustrates September temperature patterns in Irvine, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Irvine, September typically has an average temperature of 13°C (56°F), with highs reaching up to 24°C (75°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec434243465055585856524744
Data source: Temperature data for Irvine 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 Irvine

In Irvine in September, the precipitation amount reaches 144 mm (5.7 in) over the course of 20 days.

September Precipitation Trends in Irvine

The chart displays monthly precipitation patterns in Irvine, 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 Irvine, September typically receives around 144 mm (5.7 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec1551841394670124130154144201178198
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Irvine

In Irvine 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 Irvine

This chart illustrates the average monthly humidity levels in Irvine, 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 Irvine is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%85%81%83%82%82%88%90%92%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Irvine

In Irvine 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 Irvine.

Maximum UV Index Levels in Irvine for September

The chart shows the monthly maximum UV Index (UVI) for Irvine 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 Irvine typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123568865311
Data source: Irvine 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 Irvine Compares to Other Months

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

This table compares monthly weather conditions in Irvine, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)155 mm (6.1 inches)90%low
February Weather6°C (43°F)184 mm (7.2 inches)88%low
March Weather6°C (44°F)139 mm (5.5 inches)86%moderate
April Weather8°C (46°F)46 mm (1.8 inches)85%moderate
May Weather10°C (51°F)70 mm (2.7 inches)80%high
June Weather13°C (56°F)124 mm (4.9 inches)83%very high
July Weather14°C (58°F)130 mm (5.1 inches)82%very high
August Weather15°C (58°F)153 mm (6.0 inches)82%high
September Weather13°C (56°F)144 mm (5.7 inches)88%moderate
October Weather11°C (52°F)201 mm (7.9 inches)90%moderate
November Weather8°C (47°F)178 mm (7.0 inches)92%low
December Weather7°C (44°F)198 mm (7.8 inches)89%low

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