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I'm looking for monthly averages for wind speed and wind direction at surface level for South America, preferably (but not exclusively) as GIS layers.

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    openweathermap.org/history sign up for an API key to group by days
    – Mapperz ♦
    Commented Nov 10, 2015 at 21:11
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    Which countries are you looking for? Maybe you should contact the metorological offices. An overview of the services is given here: wmo.int/pages/members/members_en.html
    – countryman
    Commented Nov 10, 2015 at 21:40
  • openweathermap charges pretty much for historical data. The chilean meteorological office doesn't have much data in digital form.
    – bmclain
    Commented Nov 11, 2015 at 0:54
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    You can contact metgis.com (note: I am working for this company). Depending on the requirement need we can customize the output.
    – bennos
    Commented Nov 11, 2015 at 8:33

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You can get the monthly mean data of wind speed, u and v component of wind from the website of Earth System Research Laboratory here. The data is in the form of NetCDF files.From u and v components, you can find the direction of wind. In this direction there is a helpful link.

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Alternatively, you could check out the Global Wind Atlas by DTU Energy and the World Bank Group. There you can find wind speed, power density and capacity factor layers in GIS format free of charge. Besides that the website has data on wind direction, wind speed frequency and much more.

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