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.
1 The months May, June, September and October have nice weather with a good average temperature. 2  Hot season / summer is in June, July, August and September. 3  Lisbon has dry periods in June, July, August and September. 4  On average, the warmest month is July.  On average, the coolest month is January.