Sundial at Approximately 20 Metres in Front of Tretheague House is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 17 June 1988. Sundial.

Sundial at Approximately 20 Metres in Front of Tretheague House

WRENN ID
old-mortar-acorn
Grade
II
Local Planning Authority
Cornwall
Constituency
Camborne and Redruth MP: Perran Moon (Lab)
Country
England
Date first listed
17 June 1988
Type
Sundial
OS grid reference
SW 728 361
Coordinates
50.18215, -5.18245
Source
Historic England listing

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

Description

This is an 18th-century sundial located approximately 20 metres in front of Tretheague House. It is made of dressed granite and features a brass clock face and pointer. The sundial has an octagonal shaft, which may be reused, and is topped with a projecting square-edged cap that has the sundial set into the middle.

Local climate

Sundial at Approximately 20 Metres in Front of Tretheague House receives an average of 870 mm of rain a year. This makes it wetter than 62% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 86% of listed buildings.

It experiences an average of 5 freeze-thaw cycles a year, fewer than 97% of listed buildings. Of these, 2 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.

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