How are prayer times calculated for Watford?
Sitting at roughly 51.66°N in Hertfordshire, Watford has its own sunrise and sunset each day, so its prayer times are worked out from its exact position rather than a regional average.
Today the sun rises at 07:39 and Maghrib falls at 17:51, giving 10h 12m between the two. As the year turns this daylight window lengthens and shortens, which is why Fajr (currently 05:47) and Isha (currently 19:37) shift gradually from week to week.
When praying in Watford, the Qibla is faced towards the Kaaba in Makkah, which lies on a bearing of 119° from here, roughly to the south-east — a great-circle distance of about 4,818 km.
Prayer times in Watford are very close to those in neighbouring towns, though they differ by a minute or two with distance. Nearby you can also check Harrow (9 km), St Albans (11 km) and Hemel Hempstead (12 km).