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.
Spring is an agreeable time in Lisbon with average temperatures by May creeping up to the 17Â°C mark with daily highs reaching 21Â°C and above. Sea temperatures creep up about a degree a month too and by May reach 17Â°C.ach average 5mm of rain at most. September sees a little more rain â about 20-25mm; still very dry compared to the rest of the months of the year. Autumn is another good time to visit Lisbon, with very pleasant temperatures most of the time.