CFSv2 monthly mean SSTs (clim19912020)
 TrgMonth     SST34
   202405     0.30
   202406    -0.28
   202407    -0.77
   202408    -1.09
   202409    -1.31
   202410    -1.63
   202411    -1.81
   202412    -1.77
   202501    -1.60