Porto, Portugal
- Position
- 41.15°N, 8.6°W
- temperate latitudes, northern hemisphere
- Time zone
- Europe/Lisbon
- Clocks run 34 minutes ahead of the local sun
- Lines that can reach it
- All forty
- A body more than 48.9° from the celestial equator never rises or sets here
- Longest day
- 14 hours 58 minutes
- At the summer solstice
in the temperate middle latitudes, where the difference between a summer and a winter day is something you plan around