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The sea's influence in the south-west usually prevents cold temperatures, however temperatures can plummet during periods of cold easterly air flow: all of which have been recorded in January. In 1987 the minimum temperature recorded at St Mawgan , Cornwall was −9 °C (16 °F) and −7.2 °C (19.0 °F) was noted on the Isles of Scilly.
Cornwall is one of the sunniest areas in the UK, with over 1541 hours of sunshine per year, with the highest average of 7.6 hours of sunshine per day in July. [5] The moist, mild air coming from the south west brings higher amounts of rainfall than in eastern Great Britain, at 1051 to 1290 mm (41.4 to 50.8 in) per year, though not as much as in ...
Average maximum temperatures range between 19 and 22 °C (66 and 72 °F). Winters tend to be fairly wet, rainfall is excessive and the temperature usually stays above freezing. Spring and autumn feel quite similar and the temperatures tend to stay above 14 °C (57 °F) – also the average annual daytime temperature. [32]
Extreme temperatures in Cornwall are particularly rare; however, extreme weather in the form of storms and floods is common. Due to climate change Cornwall faces more heatwaves and severe droughts, faster coastal erosion, stronger storms and higher wind speeds as well as the possibility of more high-impact flooding.
As temperatures passed 40C for the first time in the UK, storms cooled Cornwall and the Isles of Scilly, with the Met Office forecasting temperatures in the low 20s in Penzance on Tuesday.
Highest monthly total (UK national average) [11] 266 hours UK (national average) May 2020 Highest monthly total (England) [2] 383.9 hours Eastbourne, Sussex: July 1911 Highest monthly total (Northern Ireland) [2] 298 hours Mount Stewart, County Down: June 1940 Highest monthly total (Scotland) [2] 329.1 hours Tiree, Argyll & Bute: May 1975
Get the Cornwall, PE local weather forecast by the hour and the next 10 days.
00:48. Includes weather reports from an extended list of coastal stations at 00:52 and an inshore waters forecast at 00:55 and concludes with a brief UK weather outlook for the coming day. The broadcast finishes at approximately 00:58. 05:20. Includes weather reports from coastal stations at 05:25, and an inshore waters forecast at 05:27.