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 April. April sees temperatures climb steadily as the summer season kicks off. The average temperature reaches up to around 19Â°C (that's about 66Â°F), and at night only dips as low as 11Â°C (about 52Â°F). In April you can expect at least 10 days where the temperature reaches between 21Â°C and up to 26Â°C.