CFSv2 monthly mean SSTs (clim19912020)
 TrgMonth     SST34
   202405     0.20
   202406    -0.29
   202407    -0.61
   202408    -0.95
   202409    -1.15
   202410    -1.41
   202411    -1.60
   202412    -1.52
   202501    -1.26