However, the jury is still out on many of these issues, as there is a lack of comprehensive studies. According to data collected by NCSL : -Twenty-one states currently have school districts (with public schools) operating on a four-day week.
In the capital Lisbon average temperatures range from 8 degrees Centigrade in January to 29 degrees Centigrade in July. But it is not unusual to get temperatures well over 30 degrees Centigrade in some summers particularly at the holiday resort of Faro in far south of Portugal.
Averages for Lisbon in May. May brings very pleasant, warm temperatures to Lisbon. The average temperature reaches up to around 17Â°C (that's about 62Â°F), and dips no lower than 13Â°C (about 55Â°F) in the evenings.