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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 20°C (68°F). However, temperatures can vary, with a minimum of 5°C (41°F) and soaring up to a maximum of 34°C (93°F). Visitors can expect 75 mm (3.0 in) of precipitation spread over 9 days, accompanied by an average humidity of 78%.

September Temperature in Attica

In September in Attica, the average temperature is 20°C (68°F). Maximums can reach 34°C (93°F) and minimums can be as low as 5°C (41°F). Travelers should be prepared for warm days and cool nights, making layering essentials for this time of year.

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 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec293240506271757268574135
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 75 mm (3.0 in) distributed over 9 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 75 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7390961121281271228375938973
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 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 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 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 Attica

In Attica 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 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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-2°C (30°F)73 mm (2.9 inches)88%moderate
February Weather0°C (32°F)90 mm (3.6 inches)87%moderate
March Weather5°C (41°F)96 mm (3.8 inches)87%high
April Weather10°C (50°F)112 mm (4.4 inches)87%very high
May Weather17°C (62°F)128 mm (5.0 inches)81%very high
June Weather22°C (71°F)127 mm (5.0 inches)82%very high
July Weather24°C (75°F)122 mm (4.8 inches)81%very high
August Weather22°C (73°F)83 mm (3.3 inches)78%very high
September Weather20°C (68°F)75 mm (3.0 inches)78%very high
October Weather14°C (57°F)93 mm (3.7 inches)82%high
November Weather5°C (42°F)89 mm (3.5 inches)89%moderate
December Weather2°C (35°F)73 mm (2.9 inches)86%low

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