Sundial in the Churchyard of St Mary's Parish Church is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 1 February 1988. A C19 Sundial.

Sundial in the Churchyard of St Mary's Parish Church

WRENN ID
hallowed-bailey-mallow
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
1 February 1988
Type
Sundial
Address
Sundial in the Churchyard of St Mary's Parish Church, Hay, Powys
OS grid reference
SO 225 421
Coordinates
52.07199, -3.13084
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The sundial in the churchyard of St Mary's Parish Church is made of a square stem that stands about 4 feet high. The stem flares out at the top, where it holds a lead octagonal dial and gnomon. The sundial is inscribed with "Parish of Hay 1826, Joseph Huil (?) fecit Birmingham" and includes the names of four churchwardens and overseers.

Local climate

Sundial in the Churchyard of St Mary's Parish Church receives an average of 900 mm of rain a year. This makes it wetter than 67% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 54% of listed buildings.

It experiences an average of 52 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 29 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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