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.
The average weather conditions for Lisbon in mid February (one week for example): The average daily maximum temperature is between 14Â°C and 18Â°C. At night it cool down to temperatures between 7Â°C and 10Â°C. On average there are 2 days with precipitation, 5 days without it. The daily sunshine duration is about 6 hours.