St Mary's Weather Forecast, Cornwall TR21 0

Today 7 Dec South West England

Dull with pulses of rain, particularly heavy over south-facing hills and coastal areas. Becoming drier in western counties by the end of the afternoon. Windy with local coastal gales. Milder. Maximum Temperature 10C.

Tonight 7 Dec South West England

Often clear skies with blustery showers overnight, these perhaps thundery in western coastal regions. Winds easing this evening before strengthening again overnight, especially in coastal areas. Turning rather cold in sheltered rural and inland areas but staying largely frost free. Minimum Temperature 3C.

Fri 8 Dec South West England

A brighter day on Friday, however a chance of brief heavy showers, though also some sunny spells. Milder but windy with coastal gales possible, especially through the Bristol Channel. Maximum Temperature 10C.

Sat 9 Dec South West England

Mild and windy this weekend with periods of heavy rain interspersed with drier/clearer and more showery spells. Coastal gales at times. Turning somewhat less mild on Monday with sunny spells.

Sun 10 Dec South West England

Mild and windy this weekend with periods of heavy rain interspersed with drier/clearer and more showery spells. Coastal gales at times. Turning somewhat less mild on Monday with sunny spells.

Mon 11 Dec South West England

Mild and windy this weekend with periods of heavy rain interspersed with drier/clearer and more showery spells. Coastal gales at times. Turning somewhat less mild on Monday with sunny spells.

Tue 12 Dec South West England

Initially unsettled but mild, with rain clearing northern areas whilst showers and sunny spells expected in the south - potential for heavier showers merging into longer spells of rain. By mid-week becoming more settled as high pressure affects southern areas whilst remaining a more wet and windy regime in the north. As such, the wettest weather likely across western high ground, mainly in Scotland and occasionally parts of Northern Ireland and northwest England. Settled conditions in the south with average temperatures and cloudy at times with patchy light rain near coasts and over hills. Clearer spells favouring the southeast but these also allowing potential for fog or frost overnight. The following week returns to unsettled conditions but average to mild temperatures, though favouring the northwest for wettest and windiest conditions.

Wed 13 Dec South West England

Initially unsettled but mild, with rain clearing northern areas whilst showers and sunny spells expected in the south - potential for heavier showers merging into longer spells of rain. By mid-week becoming more settled as high pressure affects southern areas whilst remaining a more wet and windy regime in the north. As such, the wettest weather likely across western high ground, mainly in Scotland and occasionally parts of Northern Ireland and northwest England. Settled conditions in the south with average temperatures and cloudy at times with patchy light rain near coasts and over hills. Clearer spells favouring the southeast but these also allowing potential for fog or frost overnight. The following week returns to unsettled conditions but average to mild temperatures, though favouring the northwest for wettest and windiest conditions.

St Mary's Weather Forecast

Today 7 Dec South West England

Tonight 7 Dec South West England

Fri 8 Dec South West England

Sat 9 Dec South West England

Sun 10 Dec South West England

Mon 11 Dec South West England

Tue 12 Dec South West England

Wed 13 Dec South West England

Temperature Forecast Met Office

Temperature Real-Time

Predannack (Cornwall) Radar

National Satellite

National Synoptic

St Mary's Temperature Statistics

December Temperature

Scilly St Marys (1km)

Lowest 17 January, 2023

Average 2023

Highest 9 September, 2023

Lowest 30 November, 2023

Average November

Highest 18 November, 2023

Lowest 2 December, 2023

Average December

Highest 3 December, 2023

Climate (2018–Present)

Scilly St Marys (1km)

Average Low 2018–2023

Average 2018–2023

Average High 2018–2023