Using R, the fitdistr function will accomplish both Weibull and Exponential (from the MASS library)

https://stat.ethz.ch/R-manual/R-devel/library/MASS/html/fitdistr.html

There is a procedure here for the Rayleigh:

http://avrilomics.blogspot.com/2013/04/making-maximum-likelihood-estimate-of.html

These aren't things I do myself very often, though I do know what these procedures are as I am formally trained in Reliability Engineering.

Hello,

this tool may help you for the shape parameters of the weibull distribution.

http://wind-data.ch/tools/weibull.php

Regards

Hello Mr. Rabiu,

The most accepted method for evaluation of Weibull Parameter is Maximum Likelihood Method. However, you can use method of moments because it is in closed form, easy to use and reliable. For method of moment you only need to calculate mean of sample and its standard deviation.

I have used method of moments in this paper. You can follow the link.

Article A Statistical Analysis of Wind Speed and Power Density Based...

Wind Atlas and Analysis Program (WAsP)  model considered as standard software. The program contains a complete set of models to calculate the effects on the wind of sheltering obstacles, surface roughness changes, and terrain height variations. The analysis part consists of the analysis of raw wind data (speed and direction) and generation of wind atlas data. The wind atlas data set can subsequently be applied for

estimation of the wind climate and wind power potential, as well as siting of

specific wind turbines. I have used the model in these papers. you can follow the link.

regards

Data Integrating WAsP and GIS Tools for Establishing Best Positio...

Research Wind Resource Estimation and Mapping at Ali Al-Gharby Site (...

Check these 2 webs. Hope they can help you

Excel:

http://www.real-statistics.com/distribution-fitting/distribution-fitting-via-maximum-likelihood/fitting-weibull-parameters-mle/

Matlab:

http://nl.mathworks.com/help/stats/wblfit.html (ready and easy to use)