CFSv2 monthly mean SSTs (clim19912020)
 TrgMonth     SST34
   202504    -0.34
   202505    -0.21
   202506     0.02
   202507     0.12
   202508     0.09
   202509     0.11
   202510     0.25
   202511     0.25
   202512     0.30