CFSv2 monthly mean SSTs (clim19912020)
 TrgMonth     SST34
   202408    -0.35
   202409    -0.96
   202410    -1.17
   202411    -1.48
   202412    -1.52
   202501    -1.24
   202502    -0.85
   202503    -0.46
   202504    -0.10