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Summer 2009 forecast appraisal

The forecast appraisal refers to the summer forecast issued in May 2009. To see an assessment of the weather experienced across the UK see the Summer 2009 summary.

Summer 2009 forecast appraisal
    Prediction Outcome
Sping 2009 mean temperature difference from long term average (1971-2000)

Europe mean temperature

For much of Europe, temperatures likely to be above average.

Over most of Europe, the mean temperature was above average.

UK mean temperature

Likely to be above average.

UK-mean temperature was above average — see Summer 2009 summary.

Summer 2009 precipitation percentage of long term average (1971-2000)

Europe precipitation totals

Western Europe: rainfall likely to be near or below average.

Eastern Europe: rainfall likely to be below average.

Approximately a third of Western Europe was in each of the dry, average and wet categories (see map).

Almost half of Eastern Europe was drier than average. The remainder was either near or wetter than average.

UK precipitation totals

UK-mean rainfall likely to be near or below average; unlikely to be as wet as summers of 2007 or 2008

UK-mean rainfall was above average — see Summer 2009 summary. UK summer rainfall total in 2009 was less than in 2007, but only marginally less than in 2008.

*Areas are defined as: Northern Europe, 48°–75°N / 10°W–40°E; Southern Europe, 30°–48°N / 10°W–40°E; Western Europe, 10°W–20°E / 30°–75°N; Eastern Europe, 20°E–40°E / 30°–75°N.