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.
Lisbon nights in January are cooler, around 8 Â°C. Both Lisbon and Porto are rainy during this month, with 11 days of rain in the capital and 13 days in Porto, which is farther north and has an Atlantic climate. Half as much rain falls in Faro, in the Algarve, than in Porto in January, but there are still seven days of rain.