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September Weather in Kastelli, Greece

Last updated: August 23, 2025

In September, the average temperature in Kastelli, Greece is a pleasant 23°C (74°F). However, you might experience a range with minimums dipping to 14°C (58°F) and maximums soaring up to 37°C (99°F). Expect 16 mm (0.6 in) of rain over just 2 days, and don't forget the humidity, which averages a steamy 80%.

September Temperature in Kastelli

In September in Kastelli, the average temperature is 23°C (74°F). Maximums can reach 37°C (99°F), while minimums can drop as low as 14°C (58°F). Be prepared for warm weather with potential heatwaves, making it a great time to explore outdoor activities and attractions.

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

The chart illustrates September temperature patterns in Kastelli, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kastelli, September typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (99°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec505254606874787874676154
Data source: Temperature data for Kastelli 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 Kastelli

In Kastelli in September, the precipitation amount is 16 mm (0.6 in) over a period of 2 days.

September Precipitation Trends in Kastelli

The chart displays monthly precipitation patterns in Kastelli, 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 Kastelli, September typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec606658323826211016386069
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kastelli

In Kastelli in September humidity is 80%. With an average temperature of 23°C (74°F), this humidity feels like walking through a warm, damp blanket, making travel feel sticky and muggy, where every step leaves you yearning for a cool breeze.

September Average Humidity in Kastelli

This chart illustrates the average monthly humidity levels in Kastelli, 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 Kastelli is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%73%75%79%85%84%83%81%80%77%73%73%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kastelli

In Kastelli in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Kastelli.

Maximum UV Index Levels in Kastelli for September

The chart shows the monthly maximum UV Index (UVI) for Kastelli 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 Kastelli typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111119753
Data source: Kastelli 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 Kastelli Compares to Other Months

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

This table compares monthly weather conditions in Kastelli, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)60 mm (2.4 inches)72%moderate
February Weather11°C (52°F)66 mm (2.6 inches)72%moderate
March Weather12°C (54°F)58 mm (2.3 inches)75%high
April Weather15°C (60°F)32 mm (1.3 inches)79%very high
May Weather20°C (68°F)38 mm (1.5 inches)85%very high
June Weather23°C (74°F)26 mm (1.0 inches)84%extreme
July Weather26°C (78°F)21 mm (0.8 inches)83%extreme
August Weather26°C (78°F)10 mm (0.4 inches)81%extreme
September Weather23°C (74°F)16 mm (0.6 inches)80%very high
October Weather19°C (67°F)38 mm (1.5 inches)77%high
November Weather16°C (61°F)60 mm (2.4 inches)73%moderate
December Weather12°C (55°F)69 mm (2.7 inches)72%moderate

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