Seasonality in Turbine Installation Duration Seasonality in Turbine Installation Duration Seasonality in Turbine Installation Duration Days / Pos Jan 3 Feb 2.7 Mar 2.1 Apr 1.7 May 1.5 Jun 1.5 Jul 1.6 Aug 1.7 Sep 1.8 Oct 2.4 Nov 2.4 Dec 2.8