In the south-west, it is rare that snow settles on the ground. Marine / ocean climate data updated daily, surface sea temperatures and recorded in degrees centigrade and farenheit. In spring and summer, the sea is cool compared to the air temperature, causing less convective cloud cover. Extremely high temperatures (heat waves) are rare in the south-west. Rainfall 70 mm. Based on average water temperature observations over the past ten years, the warmest sea in Cornwall in April was 10.4°C/50.7°F (in Isles of Scilly), and the coldest water 9.9°C/49.8°F (in Flexbury). Cornwall, United Kingdom: Annual Weather Averages July is the hottest month in Cornwall with an average temperature of 16°C (61°F) and the coldest is February at 5.5°C (42°F) with the most daily sunshine hours at 7 in August. Inland areas are affected by their altitude: the mean temperature decreases as altitude increases. google_ad_width = 728;  maximum features: { With rising sea levels the work required to maintain the current sea defences is likely to become more expensive and it has been proposed by Ian Liddell-Grainger (Bridgwater-MP), that two inland seas are created. Inland areas received between 8–15 days of snow falling; more days of snow fall were noted particularly to the north-east. In summer, a large proportion of the rainfall is caused by sun heating the ground leading to convection and to showers and thunderstorms. [12] The Bristol Channel floods on 30 January 1607 apparently caused "many thousand" deaths and may have destroyed several small harbours. Towards the north-east of the region, the annual mean temperature decreases and is closer to just over 10 °C/51 °F. Cornwall has a temperate Oceanic climate (Köppen climate classification: Cfb), with mild winters and cool summers, and hot weather is rare. [3], Most of the rainfall in the south-west is caused by Atlantic depressions or by convection. In June 1925, the highest monthly sunshine totals were recorded: 381.7 hours at Pendennis Point, Cornwall and 334.8 hours at Long Ashton, Somerset. Based on weather reports collected during 2005–2015. In winter these values increase to 15–16 on the coast, 12–13 in the north-east and over 18 days in high altitude. [2], 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. background: '#2f97ff', } of sunshine per year. [6] People have attempted to drain the area for hundreds of years. They have the highest summer maxima temperatures, but winter minima are lower than those of the coast. Rainfall is lowest at the coast and snowfall there is rarer than the rest of the region. Daytime maximum temperatures average around 18°C (65°F), whilst at night 9°C (49°F… In September sea water temperature throughout Cornwall is not yet warm enough for swimming and does not exceed 20°C/68°F. Cornwall - Weather warnings issued 14-day forecast. This typical climate of inland areas is more noticeable the further north-east into the region. There are a lot of attractions December is a very cold and rainy time for sunbathing in Cornwall, and not recommended.December is too cold for swimming in Cornwall for any length of time, unless you have a wetsuit. [11], The south-west, although the mildest region of the British Isles, has been affected by some of the most severe blizzards. links: '#809c2a' In late spring/summer, 9–10 days per month recorded rain in coastal areas, 7–9 days in the north-east and 12–13 days at high altitude (Princetown). All major government investments will have to consider the risks as a result of future climate change.[15]. [4], The sea reaches its highest temperature in late summer/autumn and its lowest in late winter/spring. “More climate info” is based on statistics, climate data and personal experience. You can choose the units of measurement for displaying … [4], The Isles of Scilly have annual rainfall totals of about 850–900 mm (33–35 in). Cornwall Weather by month // weather averages live: true, Truro, Cornwall, United Kingdom - Monthly weather averages including average high and low Temperature, Precipitation, Pressure, Wind Charts to assist you in planning your travel, holiday or an outdoor activity at Truro, United Kingdom Rainfall Days 19 days. Indoor and outdoor, weather permitting, farmers market event in Cornwall. contact. The wettest station of the region, Princetown, has recorded 7 millimetres (0.28 in) of rain during May. ", £357 million on flood risk management in Cornwall, Devon, Dorset, Somerset, South Gloucestershire and Wiltshire has been spent since 2002, which includes spending continuing into 2009/10. //-->, Climate information Both of these factors also result in the highest levels of snowfall and the lowest levels of sunshine. Wind speeds can vary on local topography: wooded or urban areas sheltered by hills receive fewer days of gales and lower wind speeds. subject: 'England', Showing: All Year January February March April May June July August September October November December. The oceanic climate is typified by cool winters with warmer summers and precipitation all year round, with more experienced in winter. [15], Rising sea levels are likely to cause more flooding on the Somerset Levels. climate data for any destination ● [13], According to a study by the Met Office, within 40 years the average temperature is likely to increase by 2 °C (4 °F) in the south-west and the average warmest summer day will increase by 3 °C (6 °F) to be 31 °C (88 °F). It caused the highest wind speed during the 1971–2001 period to be recorded in two stations: 84 knots (156 km/h; 97 mph) at Plymouth and 85 knots (157 km/h; 98 mph) at St Mawgan. This year it takes place between the 13th-22nd September. The climate can vary from some pleasantly mild days particularly at the start of September to cooler and colder days in October and November. Information in this article relates to the Met Office definition of south-west England, which covers Cornwall, Devon, Somerset, North Somerset, Bath and North East Somerset, South Gloucestershire, the City of Bristol and the Isles of Scilly. On the coast, most months have recorded less than 20 millimetres (0.79 in) and, some months, less than 10 millimetres (0.39 in) at some point. Cornwall weather & climate: all about temperatures, precipitation, sunshine, snow, … "The Prime Minister will use the first in-person G7 summit in almost … Temperature September. Temperature 14.5 °C 58 °F. I want part to be a walking trip and have dialogued with Encounter Walking Holidays. new TWTR.Widget({ cottages and old fishing villages. Coastal areas of Cornwall and Devon typically receive 900–1,000 mm (35–39 in) of rainfall annually. Weather warnings issued. We are in our late 30ies and want to definitely stay near the sea. Convective showers on 12 January 1987 left parts of Cornwall with deep snow: 35 cm (14 in) at Falmouth, 39 cm (15 in) Penzance and 23 cm (9.1 in) on the Isles of Scilly. Cornwall gets about 1,541 hours 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 Weather September Averages, United Kingdom. If a depression passes along the English Channel, strong winds can occur from the east or north-east. Much of the landscape of Devon and Cornwall consists of plateaux at varying levels. } type: 'search', We provide information, it’s up to the reader to use it to it’s benefit. Widespread winds from the Burns' Day storm on 25 January 1990 overturned vehicles and damaged buildings. Based on average water temperature observations over the past ten years, the warmest sea in Cornwall in September was 16.5°C/61.7°F (in Flexbury), and the coldest water 15.3°C/59.5°F (in St Ives). Occur from the Burns ' Day storm on 25 January 1990 overturned vehicles damaged! °C across the south-west, it i... s caused by deep depressions across or to! 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