The CHELSA timeseries data is a monthly dataset of precipitation, maximum-, minimum-, and mean temperatures at 30 arc sec resolution for the earths land surface areas. There are separate files for each month starting January 1979 – December 2013. For temperatures also air temperature over the oceans is included.
If you are interested in the performance of the timeseries in comparison to other climate products, check out Table 2 , Table 4 , Figure 3 , and Figure 6 in the publication describing CHELSA in Scientific Data.
The data can be downloaded here: DOWNLOADS
When using the data, you agree to cite the respective original peer-reviewed publication AND the respective dataset (Why are data citations neccessary?):
Karger, D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E., Linder, P., Kessler, M. (2017). Climatologies at high resolution for the Earth land surface areas. Scientific Data. 4 170122. https://doi.org/10.1038/sdata.2017.122
Karger D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E,, Linder, H.P., Kessler, M.. Data from: Climatologies at high resolution for the earth’s land surface areas. Dryad Digital Repository. http://dx.doi.org/doi:10.5061/dryad.kd1d4