How was life in 2009

Annual weather 2009

January started with a cold -1.1 degrees Celsius on a monthly average. The first month was 2.1 degrees below the long-term monthly mean of one degree. The year ended with a cold spell and snow from December 18, 2009, and 2010 began with a comparatively mild transition.

The mean temperature in 2009 was 11.3 degrees Celsius, which was roughly the average for the past ten years at the Wiesbaden weather station. The decade from 2000 to 2010 is characterized by consistently high annual mean values ​​which so far in Wiesbaden have always been above ten degrees. With a deviation of +1.5 degrees from the normal value, it can be seen that 2009 was also an extraordinarily warm year. The high average temperature was mainly “carried” through the months of April and May, at around five and almost four degrees above the long-term normal value. With the exception of January, all other months were above the long-term average. This picture has been observed by meteorologists for a long time. In Frankfurt, too, in the last decade it was usually only one or two months too cold, while the other months were comparatively mild.

Also to be mentioned are the heavy precipitation events, which clearly emerged in June and November 2009 with precipitation amounts of 160 to 170 percent compared to the average value.

Looking at the long-term temperature development (see weather history), it becomes clear that there has been a clear increase in mean temperatures since the mid-1980s. With the exception of 1991 and 1996, all years since 1988 have been above the long-term average.

In general, it is important to be prepared for hotter and drier summers and warmer and wetter winters. Since hot air can store large amounts of moisture, extreme weather events such as thunderstorms, hailstorms and tornadoes (in the open countryside) can be expected despite all the summer drought.

The current changes in climatic events will make adjustments necessary. In the future, the health protection of the (urban) population from heat, flood protection and the climate issues in building projects will have to be taken into account to a greater extent. The path to a climate-friendly city will play an increasingly important role in the planning and redesign of urban spaces in the future.