Llangadfan is a village and a parish, which lies on the banks of the River Vyrnwy and extends into the Banwy River and Nant-yn-Eira stream. Llanfyllin railway station is to its north-east and Llanfair is away to its east-south-east. The pub here is known as "Cann Office Hotel".
Climate
The lowest average temperature recorded is in January and the average maximum is during August. The average annual rainfall is with a maximum monthly average of in December and lowest average of in June.
Notable landmarks
Llangadfan is home to St Cadfan's church, a medieval church whose original features have been obscured by a 19th century restoration. The church was originally said to have been established by Saint Cadfan somewhere between 510 and 515, shortly before he departed and founded a monastery on Bardsey Island where he served as its abbot from 516–542. This church was the seat of the Parish of Llangadfan for centuries, then being part of the County of Montgomeryshire. ;Features of St Cadfan's church St Cadfan's church, in the Diocese of St Asaph, located 14 miles to the west of Welshpool, originally of 15th century medieval vintage, was restored in 1867–68. It has been built over a raised sub-circular churchyard which was expanded in 1910 in the western direction. It has a small single chamber with an east facing window in east west layout. While the porch, vestry, chancel arch, new windows, and bell turret belong to the nineteenth century restoration, a stoup and a few other older structures are still visible. Stone masonry with square blocks of greyish shalesiltstone is irregularly coursed in the porch, the vestry and the bell turret and fully plastered. The roof is made of slates with black ceramic red ridge tiles with a cross finial to chancel. Peaked arches with louver boards are provided on the Northern and southern sides. The north wall has three windows, "two to the nave, one to the chancel; each has a two-centred arch with two trefoiled two-centred lights of grey freestone; and continuous hoodmoulds ending in head stops and having a central stop as well." Cobblestone floor is provided inside the church. The roof is made of timber where rafters and purlins are exposed. The north and south walls are fitted with wooden benches fixed over stone plinths. The main entrance to the church is through a pair of wrought iron gates set in stone pillars in the north-west wall, which is the main entrance. Entry to the church is also through a gravelled path from the lychgate. The southern wall has stone steps which lead to Tyn-llan. Church yard is closed within a boundary wall except the extended part of western end of the church. There is an earthen bank of 1 m height, which delimits the earlier boundary of the church where there is a lychgate made of stone. The church yard has plantation of many trees of yews, sycamores and ashes; some are dated to 1732.
Other buildings
One of the buildings of Llangadfan, Abernodwydd, a timber-framed house originally built in 1678, has been removed and re-erected at the St Fagans National History Museum, near Cardiff. In 1849, the village was said to contain a mansion and 1931 acres of land. The Cann Office Hotel dates back to at least the 17th century when it was a post office known as the "Can Office". It later became an inn, and the chief village pub and restaurant. Some interesting ancient artefacts have been unearthed in the Llangadfan area, including a stone implement unearthed during a drain maintenance job in August 1931 and a bronze palstave which was discovered in the spring of 1833 in the second field from Parc farmhouse.
Notable people
Famous residents of the village include Welsh poet, physician and radical William Jones and the medieval poet Einion Llygltw . Bynner David a local educator and publisher of a small arrangement of music was born and died in the village. John Cadvan Davies 1846–1923 Wesleyan Methodist Minister, poet and Archdruid was born in Yr Allt Farm, Llangadfan on 1 October 1846 Successful painter Shani Rhys James MBE is based in the village.