Summer 2009 round-up

7 September 2009

Figures released today confirm that for much of the UK the summer has been both warmer and wetter than average, in what has been a summer of mixed fortunes with wide contrasts across the UK, and through the season.

  • UK mean temperature over the three months of June, July and August was 0.6 °C above the long-term average at 14.7 °C.
  • UK rainfall reached 318.5 mm, 40% more than average.
  • Summer 2009 was warmer than both 2007 and 2008.
  • Unlike 2008, each summer month saw temperatures in excess of 30 °C.
  • In the south-east of England rainfall was very close to normal and temperature was 0.6 °C above normal.
  • In western Scotland 60% more rain than normal fell through the summer months, although it was almost a degree warmer than normal.
Observed mean temperature and the difference from the 1971-2000 long-term average.
Region June 2009 July 2009 August 2009 Summer 2009
Actual (°C) Difference (°C) Actual (°C) Difference (°C) Actual (°C) Difference (°C) Actual (°C) Difference (°C)
UK 13.6 1.0 15.1 0.3 15.3 0.6 14.7 0.6
England 14.5 1.0 16.1 0.1 16.6 0.7 15.7 0.6
Wales 14.0 1.3 14.8 -0.2 15 0.2 14.6 0.4
Scotland 12.0 1.0 13.8 0.8 13.5 0.7 13.1 0.8
Northern Ireland 13.6 1.3 14.6 0.2 14.5 0.3 14.2 0.6

Mean temperature

UK map of average temperatures in Summer 2009

Fig 1. UK map of average temperatures in Summer 2009

Observed rainfall and as a percentage of the 1971-2000 long-term average.
Region June 2009 July 2009 August 2009 Summer 2009
Actual (mm) % of normal Actual (mm) % of normal Actual (mm) % of normal Actual (mm) % of normal
UK 63.4 87 142.9 205 112.2 133 318.5 140
England 55.5 88 129.8 239 58.5 88 243.8 133
Wales 77.4 90 215.9 275 95.1 90 388.4 144
Scotland 73.8 87 148.3 161 197.1 183 419.2 147
Northern Ireland 57.5 80 127.1 173 159.9 176 344.5 146

Summer 2009 rainfall

UK map of observed rainfall in Summer 2009

Fig 2. UK map of observed rainfall in Summer 2009

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Last updated: 13 May 2011