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Autumn 2009

The following represents an assessment of the weather experienced across the UK during autumn 2009 (September, October and November) and how it compares with the averages for 1971 to 2000 (the period used for the seasonal forecast).

The UK mean temperature for autumn was 10.3 °C, which is 1.2 °C above the 1971-2000 average. It was warmest in south-east England, where it was close to 1.5 °C above. It was the sixth-warmest autumn in the UK series from 1914. For England, only the autumns of 2005 and 2006 were warmer. Mean temperatures were 0.9 °C above average during September, 1.2 °C above during October and 1.4 °C above in November. There was a notable absence of frost in November.

Autumn overall was wetter than normal in most areas, particularly in much of northern England and eastern Scotland, with the drier exceptions being in East Anglia, the east Midlands and the far north-west of Scotland. The three months had contrasting rainfall patterns. September was very dry across England, Wales and Northern Ireland, all of which received well below half the normal amount. October was also drier than normal over most of the UK, with the driest areas stretching from London across the Midlands to Merseyside, while it was very wet across eastern Scotland. In November, almost all the UK recorded well above average rainfall, with large areas having over twice the normal amount. The wettest areas were Cumbria, Northumberland, the Scottish Borders and parts of Northern Ireland, mid-Wales and southern England.

Sunshine totals for the autumn across the UK were mostly within 10% of the 1971-2000 average. Southern England was sunniest in September. October was generally rather dull. East Anglia, other eastern areas of England and the far north of Scotland were brightest in November.

UK statistical summary
Mean temperature Rainfall Sunshine
The mean value is 10.3 °C, which is 1.2 °C above the 1971-2000 average. The total is 388 mm, which is 116% of the 1971-2000 average. The total is 274 hours, which is 100% of the 1971-2000 average.

Provisional graph of UK daily mean temperature for Autumn 2009 (September, October and November)


Mean temperature anomaly (difference from average) map for Autumn 2009 (September, October and November)


Rainfall percent of average map for Autumn 2009 (September, October and November)


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