There are several tools and I recommend RETScreen (www.retscreen.net) which will allow technical-economic feasibility analyses, including the assessment of the reduction of CO2 emissions (both environmentally and financially).
With this tool, you have access to 1000´s of local-ground and satellite (NASA) data sets that will permit to develop prefeasibility analysis with moderate resources. Also, you may upload your locally measured data if you want to develop more accurate feasibility analysis.
With this tool you may also perform sensitivity and risk analysis and therefore, it can help you in better policy-making or just to foresee critical aspects to be accounted for in the detailed feasibility analysis.
I suggest to review our paper in which we assessed the level of accuracy of RETScreen in the prediction of the power generation in a set of Wind Farms in Canada, at: