CFSv2 monthly mean SSTs (clim19912020)
 TrgMonth     SST34
   202404     0.59
   202405    -0.11
   202406    -0.71
   202407    -1.06
   202408    -1.46
   202409    -1.74
   202410    -1.97
   202411    -2.12
   202412    -2.06