This article is about the modern administrative region of Greece. For the historical region, see Attica. For the former prefecture, see Attica Prefecture. For other uses, see Attica (disambiguation).
With the 2010 Kallikratis plan, the region's powers and authority were completely redefined and extended. Since 1 January 2011, the region represents the second-level local administration. While being supervised by the Decentralized Administration of Attica, it is now an independent self-governing body with powers and a budget comparable to the former prefectures.
The highest July and August temperatures are recorded in the interior of the Athens Basin and also in west areas with Nea Filadelfeia, Harokopio University and Salamina registering average summer highs over 35°C.[12][6][13] Due to land breezes, summer nights can be particularly hot in the south and especially around Piraeus which records an average August low of around 27°C.[6][14] The highest average annual temperatures are recorded in Nea Smyrni registering around 20.5°C, while the lowest is recorded in Parnitha mountain with less than 11.0°C.[6][15][16]Neos Kosmos is the warmest area of DowntownAthens with an average annual temperature of 20.2°C and a hot semi-arid climate (Köppen climate classification: BSh) closely bordering a hot-summer mediterranean (Csa) climate. During July 2024 minimum temperatures remained over 30 °C (86 °F) for 12 consecutive days in metropolitan Athens, breaking all known records for any area in the country.[17][18]
Anavysos in the Athens Riviera records the lowest average annual precipitation in mainland Greece with around 295 mm, while the highest average annual precipitation is found in Avlonas with around 930 mm.[19]Lavrio is the only area in mainland Attica that has never recorded an air frost according to the National Observatory of Athens station which operates since 2008.[20][6]
The highest temperature ever recorded in Attica was 48.0°C in Elefsina and Tatoi on July 10, 1977 which according to the World Meteorological Organization was also the highest official temperature ever recorded in Europe until 2021.[21] The lowest temperature ever recorded was -12.0°C in Parnitha mountain on January 9, 2017.[22] The highest minimum temperature in mainland Attica was 32.9 °C (91 °F) and it was recorded on July 26, 2023 in Hellinikon.[23] The highest minimum temperature in the Attica region was 37.0 °C (99 °F) in Kythira. [24][25]
Furthermore, Attica has experienced temperatures of 47.5°C and over in four different locations.
Climate data for Downtown Athens (1991–2020), Extremes (1890–present)
The Gross domestic product (GDP) of the region was 87.4 billion € in 2018, accounting for about 47% of the Greek economic output. GDP per capita adjusted for purchasing power was 28,000 € or 93% of the EU27 average in the same year. The GDP per employee was 99% of the EU average. Attica is the region in Greece with the highest GDP per capita.[34] Despite that, the unemployment rate stood at 21.6% in 2017.[35]