 However, an automatic weather station has been installed on North Island since 1990, and hourly measures of precipitation, air temperature, wind speed, wind direction, relative humidity and atmospheric pressure have been publicly available since then.Based on this and other data, researchers have put together a picture of the Abrolhos' climate.The islands have a Mediterranean climate (semi-arid climate, or Bsh, under Köppen climate classification) with warm dry summers and cooler, wet winters.