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.
Average Temperatures in Lisbon, Portugal. The average annual temperature in Lisbon, Portugal is very mild at 16.8 degrees Celsius (62.2 degrees Fahrenheit). There is a variation of mean monthly temperatures of 11.4 C (20.5F) which is a low range. The range/ variation of daily mean temperatures is 8 C (14.5 F).