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September Weather in Gibraltar, United States

Last updated: June 24, 2025

In Gibraltar, United States, the average temperature in September is a pleasant 20°C (68°F). However, be prepared for a temperature range that can dip to a cool 9°C (48°F) and soar to a warm 30°C (87°F). With an average precipitation of 68 mm (2.7 in) over 9 days, and humidity levels sitting at a comfortable 78%, it's wise to pack accordingly for your visit!

September Temperature in Gibraltar

In September in Gibraltar, the average temperature is 20°C (68°F). The maximum can reach 30°C (87°F), and the minimum can be as low as 9°C (48°F). This makes it an ideal time to explore outdoor attractions and enjoy various activities in pleasant weather.

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

The chart illustrates September temperature patterns in Gibraltar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gibraltar, September typically has an average temperature of 20°C (68°F), with highs reaching up to 30°C (87°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec283036455869757468564134
Data source: Temperature data for Gibraltar 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 Gibraltar

In Gibraltar in September, the precipitation amount is 68 mm (2.7 in) spread over 9 days.

September Precipitation Trends in Gibraltar

The chart displays monthly precipitation patterns in Gibraltar, 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 Gibraltar, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8583881011218396806811810274
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Gibraltar

In Gibraltar in September humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

September Average Humidity in Gibraltar

This chart illustrates the average monthly humidity levels in Gibraltar, 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 Gibraltar is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Gibraltar

In Gibraltar in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Gibraltar.

Maximum UV Index Levels in Gibraltar for September

The chart shows the monthly maximum UV Index (UVI) for Gibraltar 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 Gibraltar typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101098642
Data source: Gibraltar 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 Gibraltar Compares to Other Months

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

This table compares monthly weather conditions in Gibraltar, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)85 mm (3.3 inches)88%low
February Weather-1°C (30°F)83 mm (3.3 inches)87%moderate
March Weather2°C (37°F)88 mm (3.5 inches)87%moderate
April Weather7°C (46°F)101 mm (4.0 inches)87%very high
May Weather14°C (58°F)121 mm (4.8 inches)81%very high
June Weather21°C (69°F)83 mm (3.3 inches)82%very high
July Weather24°C (75°F)96 mm (3.8 inches)81%very high
August Weather23°C (74°F)80 mm (3.2 inches)78%very high
September Weather20°C (68°F)68 mm (2.7 inches)78%very high
October Weather13°C (57°F)118 mm (4.6 inches)82%high
November Weather5°C (41°F)102 mm (4.0 inches)89%moderate
December Weather1°C (34°F)74 mm (2.9 inches)86%low

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