Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
304 FOCA52 TJSJ 310903 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 503 AM AST Sun Aug 31 2025 PRZ001-312000- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 503 AM AST Sun Aug 31 2025 Date Sun 08/31/25 Mon 09/01/25 Tue 09/02/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 92 79 92 79 90 Temp 87 91 92 88 83 81 80 79 87 91 92 86 83 81 80 79 85 89 90 85 82 Dewpt 75 76 75 75 75 76 75 74 75 76 76 75 75 76 76 75 76 76 77 76 76 RH 68 62 58 66 77 85 85 85 68 62 60 70 77 85 88 88 75 66 66 75 82 Wind dir E E E E E E SE SE E E E E E SE SE E E E E E E Wind spd 6 13 12 12 9 6 5 5 6 11 14 12 8 8 5 6 9 12 14 12 8 Clouds B1 SC SC SC SC SC SC SC SC B2 B1 SC SC SC SC SC B1 B1 B2 B2 SC PoP 12hr 40 30 50 40 50 QPF 12hr 0.18 0.17 0.33 0.06 0.20 Rain shwrs C S S S C C C C C C C S S S S S C C C C C Tstms S S S Heat index 97103103 98 90 87 84 83 96102104 96 90 88 84 83 95101102 95 90 Max heat 97 103 102 89 96 104 103 89 95 103 102 Date Wed 09/03/25 Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 79 90 79 89 79 89 79 90 Temp 80 85 90 82 80 85 89 82 80 85 89 82 80 85 90 82 Dewpt 75 75 75 75 74 75 76 75 75 76 76 76 76 76 77 76 PWind dir E E E E E E E E Wind char LT GN LT GN LT GN GN GN Avg clouds SC B1 B1 B1 SC SC SC SC SC SC B1 B1 SC SC SC B1 PoP 12hr 40 40 30 30 30 40 20 40 Rain shwrs C C C C S C C S S C C C S S C C Tstms S S S S $$ PRZ002-312000- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 503 AM AST Sun Aug 31 2025 Date Sun 08/31/25 Mon 09/01/25 Tue 09/02/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 79 90 79 90 Temp 86 89 90 87 82 81 80 79 85 89 90 85 82 81 80 79 85 89 90 85 82 Dewpt 77 77 76 77 76 76 76 76 77 78 77 77 76 78 77 76 78 78 77 78 77 RH 75 68 64 72 82 85 88 91 77 70 66 77 82 91 91 91 80 70 66 80 85 Wind dir E E E E E E E E E E E SE E E E E E E E E E Wind spd 9 12 9 8 8 8 6 6 8 10 10 9 8 9 10 9 11 11 11 10 10 Clouds B2 SC SC SC B1 SC B2 B1 B2 B2 B1 SC SC SC SC SC B2 B2 B1 B1 B2 PoP 12hr 50 60 50 50 50 QPF 12hr 0.21 0.29 0.40 0.11 0.19 Rain shwrs C C S C C C L C C C C C S S S S C C C C C Tstms S S S Heat index 97102102 98 90 87 84 84 96103103 96 90 89 85 84 97103103 96 89 Max heat 97 102 101 89 96 104 102 89 97 104 103 Date Wed 09/03/25 Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 78 90 79 89 79 89 80 90 Temp 79 85 90 82 80 85 89 82 80 85 89 83 80 86 90 84 Dewpt 77 77 76 76 76 77 77 76 76 77 77 77 77 78 78 77 PWind dir E E E E E E E E Wind char GN GN GN GN GN GN GN GN Avg clouds B2 B2 B1 SC SC SC SC SC SC SC B1 B1 B1 B1 SC B1 PoP 12hr 50 50 30 30 30 40 40 50 Rain shwrs C C C C S C C C C C C C C C C C Tstms S $$ PRZ007-312000- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 503 AM AST Sun Aug 31 2025 Date Sun 08/31/25 Mon 09/01/25 Tue 09/02/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 78 90 77 89 Temp 84 89 90 86 82 80 79 78 85 89 90 84 81 79 78 77 84 88 89 84 81 Dewpt 71 73 72 72 72 72 71 70 70 73 74 74 74 74 73 72 73 73 74 74 74 RH 65 59 56 63 72 77 77 76 61 59 60 72 79 85 85 85 70 61 61 72 79 Wind dir E SE SE SE E NE NE NE E SE SE SE E NE E E E SE SE E E Wind spd 4 13 11 8 4 4 3 4 4 11 10 8 6 5 4 4 5 11 10 10 8 Clouds SC SC SC SC SC SC SC SC SC SC SC SC FW FW FW FW FW FW SC SC SC PoP 12hr 30 20 30 5 20 QPF 12hr 0.13 0.06 0.18 0.02 0.06 Rain shwrs S C C S S S S S C S S S S S S Heat index 89 97 97 93 86 84 89 97 99 92 86 83 90 95 98 91 86 Max heat 89 98 96 85 89 99 98 85 90 98 97 Date Wed 09/03/25 Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 77 89 77 88 77 88 77 89 Temp 78 84 89 81 78 83 88 80 78 83 88 80 78 84 89 81 Dewpt 73 73 73 73 72 70 74 72 69 71 73 74 71 71 74 74 PWind dir E E E E E E E E Wind char LT GN LT GN LT GN LT GN Avg clouds SC SC SC SC SC FW FW SC SC SC SC SC SC SC SC SC PoP 12hr 20 20 10 20 10 20 5 10 Rain shwrs S S S S S S S S S S S S S S S S $$ PRZ008-312000- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 503 AM AST Sun Aug 31 2025 Date Sun 08/31/25 Mon 09/01/25 Tue 09/02/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 79 88 77 88 Temp 84 87 88 85 82 80 79 79 84 87 88 83 80 79 78 77 83 87 88 83 80 Dewpt 75 75 76 75 75 76 75 74 75 75 77 75 76 76 76 74 75 76 77 75 76 RH 74 68 68 72 79 88 88 85 74 68 70 77 88 91 94 90 77 70 70 77 88 Wind dir E E NE NE E E E E E NE E NE E SE E E E E E E E Wind spd 10 5 8 11 13 9 8 9 8 2 8 6 8 5 5 5 8 5 8 6 3 Clouds FW FW OV B2 B2 SC SC SC FW SC B2 B2 CL CL CL CL FW FW B2 B2 SC PoP 12hr 70 50 60 5 60 QPF 12hr 0.96 0.12 1.12 0.01 0.81 Rain shwrs L L C S S S L C S S L L S Tstms S S S S S S S Heat index 91 97 99 93 88 86 84 83 92 97 99 91 86 91 98 99 91 86 Max heat 91 99 98 87 92 99 98 84 91 100 98 Date Wed 09/03/25 Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 77 88 77 88 77 88 77 88 Temp 78 83 88 80 78 83 88 80 78 83 88 80 78 83 88 80 Dewpt 75 75 76 75 75 75 76 75 75 75 77 76 76 76 77 76 PWind dir E E E E E E E E Wind char LT GN GN GN GN GN GN GN Avg clouds SC FW SC B1 SC SC SC B1 SC SC SC B1 SC SC SC SC PoP 12hr 10 60 10 50 10 50 5 60 Rain shwrs S S L L S S C C S S C C S S L L Tstms S S S S S S S S $$ PRZ010-312000- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 503 AM AST Sun Aug 31 2025 Date Sun 08/31/25 Mon 09/01/25 Tue 09/02/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 93 78 93 75 93 Temp 87 92 93 88 83 80 79 78 87 92 93 85 80 78 76 76 85 91 93 85 80 Dewpt 76 77 79 78 77 76 76 74 76 78 79 77 76 76 75 74 76 78 79 78 77 RH 70 62 64 72 82 88 91 88 70 64 64 77 88 94 97 94 75 66 64 80 91 Wind dir E SW NW NE E E E E E S N NE E E E E E SE E E E Wind spd 4 2 4 5 6 4 5 5 4 2 2 6 5 4 5 4 3 1 2 4 5 Clouds FW SC OV OV B2 SC SC SC FW SC B2 B2 FW FW FW FW FW FW B2 B2 FW PoP 12hr 80 50 60 5 60 QPF 12hr 1.26 0.10 1.12 0.01 0.81 Rain shwrs S D D C C L C L L Tstms S S S S S S S Heat index 96106110102 91 86 97106110 96 86 95107110 96 85 Max heat 96 110 109 89 97 110 108 84 95 110 108 Date Wed 09/03/25 Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 74 93 74 93 75 93 75 93 Temp 75 85 93 80 75 85 93 80 76 85 93 80 76 85 93 80 Dewpt 75 76 78 76 74 75 78 76 75 76 79 77 76 76 79 77 PWind dir E E E E E E E E Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW SC B1 SC FW SC B1 SC FW FW SC CL CL SC B1 PoP 12hr 5 60 10 50 10 50 0 60 Rain shwrs L L S S C C S S C C L L Tstms S S S S S S S S $$ VIZ001-312000- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 503 AM AST Sun Aug 31 2025 Date Sun 08/31/25 Mon 09/01/25 Tue 09/02/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 92 81 92 80 92 Temp 87 91 92 89 84 83 82 81 87 91 92 87 84 82 81 80 87 91 92 87 84 Dewpt 77 76 76 76 76 76 76 77 77 77 77 77 77 78 78 77 78 78 77 78 77 RH 72 62 60 66 77 80 82 88 72 64 62 72 80 88 91 91 75 66 62 75 80 Wind dir E E SE E E E E E E E SE E E E E E E E E E E Wind spd 14 13 10 11 12 12 12 11 11 12 12 11 12 13 13 14 16 16 13 13 14 Clouds SC SC SC SC SC B1 B1 SC B1 B1 SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 40 40 20 10 QPF 12hr 0.12 0.20 0.21 0.08 0.04 Rain shwrs S S S S C C C C C C S S S S S S S S S S S Heat index 99106109104 93 91 89 88 99105106 99 93 91 88 87100105106 99 93 Max heat 99 109 107 92 99 106 105 92 100 106 105 Date Wed 09/03/25 Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 80 92 80 92 80 92 81 92 Temp 81 87 92 84 81 87 92 84 81 87 92 84 82 87 92 84 Dewpt 77 77 76 76 77 77 77 76 77 78 77 78 79 78 78 77 PWind dir E E E E E E E E Wind char BZ GN GN GN BZ BZ BZ BZ Avg clouds SC SC SC SC SC SC SC SC SC SC SC B1 SC SC SC B1 PoP 12hr 20 20 20 20 20 40 30 40 Rain shwrs S S S S S S S S S S C C C C C C Tstms S $$ VIZ002-312000- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 503 AM AST Sun Aug 31 2025 Date Sun 08/31/25 Mon 09/01/25 Tue 09/02/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 78 90 79 91 Temp 86 89 90 86 82 80 79 78 85 89 90 85 82 81 80 79 86 90 91 85 82 Dewpt 76 76 76 76 76 76 76 76 77 77 77 77 76 77 77 76 77 77 77 77 77 RH 72 66 64 72 82 88 91 94 77 68 66 77 82 88 91 91 75 66 64 77 85 Wind dir E E E E E E E E E E E E E E E E E E E E E Wind spd 12 12 11 10 10 12 11 10 12 13 12 11 10 11 11 12 14 14 12 12 11 Clouds CL SC SC SC SC SC B1 SC B1 B1 SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 20 40 40 30 10 QPF 12hr 0.10 0.14 0.24 0.09 0.04 Rain shwrs S S S S S C S C C S S S S C C S S S S S Heat index 95100102 96 89 85 95101103 95 90 88 85 84 97102104 96 90 Max heat 95 102 101 87 95 103 102 89 97 104 103 Date Wed 09/03/25 Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 78 91 78 91 78 91 79 91 Temp 79 86 91 82 79 86 91 82 79 86 91 83 80 86 91 83 Dewpt 76 76 75 75 75 77 76 76 76 77 76 77 77 78 77 77 PWind dir E E E E E E E E Wind char GN GN GN GN GN GN GN GN Avg clouds SC FW FW SC SC SC SC SC SC SC SC B1 SC SC SC SC PoP 12hr 10 20 20 30 30 40 30 30 Rain shwrs S S S S S S S C C C C C S C C C $$