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Weather reporte: September in Penzance

By The Cornishman  |  Posted: October 10, 2013

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IN A regular monthly feature Graham Easterling rounds up the weather across Penwith for September.

AFTER the best summer for years September was rather disappointing. Although both temperature and rainfall were near normal, there was often a good deal of cloud.

The first three days saw a continuation of real summer weather, but then a breakdown in the warm, settled conditions set in. September 6 and 7 saw distinctly cool, showery north-westerly winds. It remained unsettled and generally rather cool until September 19.

After a sunny, pleasant day with light winds on September 20, warm and humid air swept north to the east of an area of low pressure in mid Atlantic. This depression was to remain for the rest of the month. As a result there were mild, muggy, often misty nights. September 28 saw an exceptionally warm night for late in the month, with a minimum temperature of 16C. Although there was some warm sunshine, particularly where the wind was offshore, days were generally plagued by low cloud, mist and drizzle.

Temperature: Maximum temperature: 20.4 on Sept 5; Minimum temperature: 6.8 on Sept 15; Average temperature: 14.9 (0.4C below the 1981-2010 average).

Rainfall: Wettest day: 15.1mm on Sept 8. Total rainfall: 85.1mm (96 per cent of the 1981-2010 norm); Rain fell on 18 days.

Sunshine (figures for Bosullow, provided by Alan Blake): Total Sunshine: 107.6 hours (74 per cent of the long-term Camborne average); Sunniest day: 11.5 hours on Sept 1. There were eight sunless days.

See more at penzanceweather.atspace.com/weather.html

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