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September Weather in Attica, United States

Last updated: June 24, 2025

In September, the average temperature in Attica, United States is a pleasant 18°C (64°F). However, be prepared for some variability; temperatures can drop to a chilly 1°C (34°F) or soar to a warm 34°C (93°F). You'll likely encounter 85 mm (3.4 in) of precipitation over about 11 days, coupled with an average humidity of 80%, creating a uniquely vibrant atmosphere.

September Temperature in Attica

In September in Attica, the average temperature is 18°C (64°F). The maximum can reach 34°C (93°F), while the minimum can be as low as 1°C (34°F). This variation in temperatures makes it essential to pack a variety of clothing options for your trip.

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

The chart illustrates September temperature patterns in Attica, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Attica, September typically has an average temperature of 18°C (64°F), with highs reaching up to 34°C (93°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec252735455868737164533831
Data source: Temperature data for Attica 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 Attica

In Attica in September, the precipitation amount is 85 mm (3.4 in) over the course of 11 days.

September Precipitation Trends in Attica

The chart displays monthly precipitation patterns in Attica, 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 Attica, September typically receives around 85 mm (3.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec626769971061058897851106853
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Attica

In Attica in September humidity is 80%. With an average temperature of 18°C (64°F), this humidity feels like a warm, damp blanket wrapping around you, making travel a bit more exhausting as the air thickens and the heat clings to your skin.

September Average Humidity in Attica

This chart illustrates the average monthly humidity levels in Attica, 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 Attica is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Attica

In Attica in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Attica.

Maximum UV Index Levels in Attica for September

The chart shows the monthly maximum UV Index (UVI) for Attica 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 Attica typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Attica 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 Attica Compares to Other Months

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

This table compares monthly weather conditions in Attica, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)62 mm (2.5 inches)88%low
February Weather-3°C (27°F)67 mm (2.6 inches)87%moderate
March Weather2°C (36°F)69 mm (2.7 inches)85%moderate
April Weather7°C (46°F)97 mm (3.8 inches)86%very high
May Weather15°C (59°F)106 mm (4.2 inches)80%very high
June Weather20°C (69°F)105 mm (4.1 inches)80%very high
July Weather23°C (74°F)88 mm (3.4 inches)80%very high
August Weather22°C (71°F)97 mm (3.8 inches)80%very high
September Weather18°C (64°F)85 mm (3.4 inches)80%high
October Weather11°C (53°F)110 mm (4.3 inches)84%moderate
November Weather3°C (38°F)68 mm (2.7 inches)89%moderate
December Weather0°C (32°F)53 mm (2.1 inches)86%low

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