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In page Aalen:

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The sunshine duration is about 1800 hours per year, which averages 4.93 hours per day. So Aalen is above the German average of 1550 hours per year. However, with 167 days of precipitation, Aalen's region also ranks above the German average of 138. The annual rainfall is 807 mm (31.8 in), about the average within Baden-Württemberg.[citation needed] The annual mean temperature is 9.9 °C (49.8 °F). Here Aalen ranks above the German average of 8.2 °C (46.8 °F) and the Baden-Württemberg average of 8.1 °C (46.6 °F).