Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
714 FOCA52 TJSJ 181832 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 232 PM AST Fri Sep 18 2026 PRZ001-190800- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 232 PM AST Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 80 92 79 92 79 Temp 86 83 82 81 80 87 91 92 86 83 81 80 79 87 91 92 86 83 81 80 79 87 Dewpt 75 75 75 75 75 75 75 76 76 75 76 75 75 75 75 76 75 75 76 75 75 75 RH 70 77 79 82 85 68 60 60 72 77 85 85 88 68 60 60 70 77 85 85 88 68 Wind dir E E E E SE E E E E E SE SE SE SE E E E SE SE SE SE SE Wind spd 12 9 9 6 5 5 11 16 12 9 6 5 5 6 11 13 11 8 5 5 4 8 Clouds SC SC B2 B2 SC SC FW SC B1 SC SC SC SC SC SC B2 B2 SC SC SC SC SC PoP 12hr 50 40 30 50 30 QPF 12hr 0.16 0.33 0.10 0.39 0.11 Rain shwrs S S C C C S S C S S C C C C C C S S C C S Tstms S S Heat index 94 90 88 86 85 96102104 97 90 88 84 84 96102104 96 90 88 84 84 96 Max heat 100 89 96 105 103 89 96 105 103 89 96 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 92 79 92 79 91 79 91 79 92 Temp 92 83 80 87 92 83 80 86 91 83 80 86 91 83 80 87 92 83 Dewpt 76 75 75 75 75 75 75 75 76 76 75 75 76 76 75 76 73 75 PWind dir E SE E E E E E SE SE Wind char GN LT GN GN GN LT GN LT GN Avg clouds SC SC SC SC SC SC FW SC SC SC SC SC SC SC SC SC SC B1 PoP 12hr 20 20 30 10 20 20 30 20 40 Rain shwrs S S S S C C S S S S S S C C S S C C $$ PRZ002-190800- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 232 PM AST Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 81 90 81 90 81 Temp 86 84 82 81 81 86 89 90 86 84 82 81 81 86 89 90 86 84 82 81 81 86 Dewpt 76 75 75 74 74 76 76 76 76 75 75 75 75 75 75 75 75 75 75 75 75 75 RH 72 74 79 79 79 72 66 64 72 74 79 82 82 70 64 62 70 74 79 82 82 70 Wind dir E E E E E E E E E E E E E E E SE SE E E E E E Wind spd 9 9 9 9 6 6 10 9 9 9 9 6 6 8 9 9 6 6 6 6 8 9 Clouds SC SC B2 SC B1 B1 SC SC SC SC B1 B1 B1 SC SC SC SC SC SC B2 B2 SC PoP 12hr 60 40 40 30 50 QPF 12hr 0.17 0.14 0.15 0.24 0.21 Rain shwrs S S L C C C S S C S C C C C C C C C C C C C Heat index 96 92 89 87 87 96101102 96 91 89 88 87 95 99100 95 91 89 88 87 95 Max heat 100 91 96 102 102 91 95 101 100 91 95 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 90 81 90 80 90 81 89 81 90 Temp 90 84 81 86 90 83 81 86 90 84 81 86 89 83 81 86 90 84 Dewpt 75 75 75 76 76 75 75 75 76 76 75 76 76 75 76 76 73 76 PWind dir SE E E E E E SE E SE Wind char GN GN GN GN GN GN GN GN GN Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 SC SC B1 B1 PoP 12hr 30 30 30 30 30 30 40 30 40 Rain shwrs C C C C C C C C C C C C C C C C C C $$ PRZ007-190800- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 232 PM AST Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 77 90 77 90 77 Temp 86 82 80 78 77 85 89 90 84 81 79 78 77 85 89 90 84 81 79 78 77 85 Dewpt 74 73 71 70 71 75 77 78 78 77 76 74 73 76 77 77 77 76 75 74 73 76 RH 68 74 74 76 82 72 68 68 82 88 91 88 87 75 68 66 80 85 88 88 87 75 Wind dir SE E NE NE NE E SE SE SE E NE NE NE E SE SE SE E E E E E Wind spd 9 6 4 3 3 4 11 12 8 4 4 3 4 5 10 10 8 5 4 4 5 10 Clouds SC CL SC FW SC SC SC SC SC SC CL SC B1 FW FW FW FW FW FW SC SC FW PoP 12hr 20 20 40 0 30 QPF 12hr 0.02 0.15 0.10 0.01 0.07 Rain shwrs S S S S S S S S S C C C Heat index 94 87 83 93101104 96 88 83 94101103 95 87 83 94 Max heat 102 86 93 105 103 87 94 103 102 86 94 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 90 77 90 76 90 76 89 77 90 Temp 90 81 78 85 90 80 77 84 90 80 77 84 89 81 78 85 90 81 Dewpt 77 76 74 71 72 74 72 72 74 74 72 75 77 76 74 76 74 73 PWind dir SE E E NE E E E E SE Wind char GN LT GN LT GN LT GN LT GN Avg clouds SC SC FW FW SC SC SC SC SC SC FW FW SC SC SC FW FW SC PoP 12hr 20 5 10 20 20 10 10 10 10 Rain shwrs S S S S S S S S S S S S S S S S $$ PRZ008-190800- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 232 PM AST Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 77 88 76 88 76 Temp 83 80 79 78 77 83 87 88 83 80 78 77 76 83 87 88 83 80 78 77 76 83 Dewpt 77 77 76 74 73 76 77 77 77 77 76 75 74 77 77 77 77 77 76 75 74 76 RH 82 91 91 88 87 80 72 70 82 91 94 94 94 82 72 70 82 91 94 94 94 80 Wind dir E E E E E E E NE E E E E E E E NE NE E SE SE E E Wind spd 11 16 8 9 8 8 8 10 11 12 12 6 8 8 6 9 8 9 6 3 5 6 Clouds B1 SC FW FW SC FW FW SC SC SC SC SC SC SC SC OV OV B2 B2 FW FW FW PoP 12hr 20 30 30 80 50 QPF 12hr 0.03 0.18 0.05 1.24 0.14 Rain shwrs C S S S C C S S S S S D D C C Tstms S S S S Heat index 93 87 92 99100 92 85 92 99100 92 85 91 Max heat 99 85 92 102 100 92 100 99 91 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 88 77 88 77 88 76 87 76 88 Temp 88 80 78 83 88 80 78 83 88 80 77 82 87 79 77 83 88 80 Dewpt 77 77 75 76 77 77 74 76 77 77 74 77 77 77 75 77 73 74 PWind dir E E E E E E E E E Wind char LT LT GN GN GN GN GN LT LT Avg clouds SC SC FW FW FW SC CL CL FW SC FW FW SC B1 SC SC SC B1 PoP 12hr 40 5 30 0 20 5 60 20 60 Rain shwrs C C C C S S S S L L S S L L $$ PRZ010-190800- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 232 PM AST Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 76 94 75 93 75 Temp 85 81 79 77 77 86 92 94 86 81 78 76 76 85 91 93 85 80 78 76 76 85 Dewpt 78 76 76 74 73 76 78 78 78 77 76 75 74 77 78 78 78 77 76 75 74 76 RH 80 85 91 90 87 72 64 60 77 88 94 97 94 77 66 62 80 91 94 97 94 75 Wind dir NE S E E E E S W NE NE E E E E SE W NE E E E E E Wind spd 6 5 5 3 2 3 2 5 2 5 5 4 4 3 1 4 3 2 5 5 5 4 Clouds B2 B2 FW FW FW FW FW SC OV B2 B2 CL CL FW FW B2 B2 SC SC FW FW FW PoP 12hr 50 80 60 50 20 QPF 12hr 0.20 1.11 0.09 0.38 0.03 Rain shwrs C C S D L C C C S S Tstms S S S S S S S Heat index 96 87 97108110 98 88 96107108 97 87 95 Max heat 104 85 97 112 109 85 96 109 107 84 95 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 93 75 92 75 92 75 94 75 94 Temp 93 80 76 85 92 80 76 85 92 80 76 86 94 81 76 86 94 81 Dewpt 78 77 75 76 78 77 75 76 78 77 75 76 77 77 75 76 72 75 PWind dir SE E E E S E SE E E Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC B1 CL CL SC SC CL CL SC B1 SC SC SC B1 SC FW SC B1 PoP 12hr 60 0 50 0 50 20 60 10 60 Rain shwrs L L C C C C S S L L S S L L Tstms S S S S S S $$ VIZ001-190800- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 232 PM AST Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 82 88 82 89 82 Temp 87 85 83 82 82 85 87 88 85 84 83 82 82 86 88 89 86 84 83 82 82 87 Dewpt 75 75 76 75 75 76 75 75 76 75 76 76 76 75 75 74 75 75 76 76 76 75 RH 68 72 80 79 79 75 68 66 75 74 80 82 82 70 66 61 70 74 80 82 82 68 Wind dir E E E E E E E E E E E E E E E SE E E E E E E Wind spd 12 13 14 12 11 12 10 10 10 12 12 11 10 11 11 10 11 12 12 11 12 12 Clouds SC SC SC SC B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 40 20 30 30 30 QPF 12hr 0.08 0.06 0.08 0.08 0.09 Rain shwrs S S C S C S S S S S C S S C C C C S S C C C Heat index 96 93 91 90 89 95 97 98 95 92 91 90 90 95 98 98 95 92 91 90 90 97 Max heat 100 92 95 98 97 92 95 99 98 92 97 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 91 82 91 81 89 82 89 82 91 Temp 91 85 82 87 91 84 82 86 89 84 82 86 89 84 82 87 91 85 Dewpt 75 75 76 74 73 74 74 74 73 73 75 76 75 76 77 76 75 75 PWind dir SE E E E E E SE E E Wind char GN BZ GN GN BZ GN GN GN BZ Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 30 20 20 20 20 20 20 20 Rain shwrs C C C C S S S S S S S S S S S S S S $$ VIZ002-190800- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 232 PM AST Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 80 88 81 91 81 Temp 86 83 82 81 80 85 87 88 85 83 82 81 81 87 90 91 87 84 83 82 81 85 Dewpt 75 76 76 76 75 76 76 76 75 75 76 75 75 76 76 76 75 75 76 76 75 76 RH 70 80 82 85 85 75 70 68 72 77 82 82 82 70 64 62 68 74 80 82 82 75 Wind dir E E E E E E E E E E E E E E SE SE E E E E E E Wind spd 12 11 12 11 10 11 11 10 11 10 10 9 8 9 10 10 10 10 10 10 11 11 Clouds SC SC SC B2 B2 B1 SC SC SC SC CL CL CL FW FW SC SC SC SC SC SC SC PoP 12hr 50 40 10 20 30 QPF 12hr 0.16 0.06 0 0.03 0.06 Rain shwrs S S S C C C S S S S S S S S S S C Heat index 96 91 89 86 85 94 98 99 93 91 90 87 87 97102103 96 92 90 88 87 95 Max heat 102 90 94 99 98 90 97 103 102 91 95 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 88 81 88 80 91 81 90 81 91 Temp 88 83 81 85 88 82 80 86 91 84 82 86 90 84 81 87 91 84 Dewpt 76 75 76 76 75 76 76 76 76 76 76 76 77 76 76 76 74 75 PWind dir SE E E E E E E E E Wind char GN GN GN GN GN GN GN GN GN Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 30 20 20 20 20 20 20 20 Rain shwrs C C C C S S S S S S S S S S S S S S $$