FOCA52 TJSJ 181832 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 232 PM AST Mon May 18 2026 PRZ001-190800- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 232 PM AST Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 75 90 75 90 75 Temp 86 80 77 75 77 84 88 90 86 80 77 75 77 84 88 90 86 80 77 75 77 84 Dewpt 70 70 70 70 70 71 71 71 71 72 72 72 71 71 72 71 71 71 71 71 71 71 RH 59 72 79 84 79 65 57 54 61 77 85 90 82 65 59 54 61 74 82 87 82 65 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 14 12 12 9 10 12 18 17 13 11 11 11 9 13 17 17 14 11 11 10 11 11 Clouds SC SC B1 SC SC B1 SC B1 B1 SC SC SC SC B1 B1 B1 B1 B2 B2 B2 B2 SC PoP 12hr 40 40 50 50 50 QPF 12hr 0.11 0.26 0.13 0.23 0.14 Rain shwrs C S C S S C S C C C C S S C C C C C C C C C Heat index 91 83 89 94 96 91 84 89 95 96 91 84 89 Max heat 95 82 89 96 96 82 89 96 96 82 89 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 76 90 76 90 76 90 76 90 Temp 90 81 76 84 90 81 76 84 90 81 76 84 90 81 76 84 90 81 Dewpt 71 72 71 71 71 72 72 71 71 72 71 71 71 72 71 71 69 71 PWind dir E E E E E E E E E Wind char GN GN GN GN GN GN BZ GN BZ Avg clouds SC SC B1 B1 B2 B1 SC SC SC B1 B2 B2 B2 B1 B2 B2 B2 B2 PoP 12hr 40 50 50 20 50 60 60 60 60 Rain shwrs C C C C C C S S C C C L L L L L L L Tstms S S $$ PRZ002-190800- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 232 PM AST Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 77 87 76 86 77 Temp 84 80 79 77 78 83 86 87 84 80 78 76 77 82 85 86 83 80 78 77 78 83 Dewpt 72 72 72 72 72 73 74 73 73 73 73 73 72 73 73 73 73 73 72 72 72 73 RH 67 77 79 85 82 72 68 63 70 79 85 90 85 74 67 65 72 79 82 85 82 72 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 13 14 16 12 13 16 19 16 13 13 13 13 13 17 16 14 13 13 13 14 13 12 Clouds SC SC B1 SC SC B1 SC B1 B1 SC SC SC SC B1 B1 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 40 40 50 50 50 QPF 12hr 0.13 0.29 0.15 0.25 0.17 Rain shwrs S S C S S C S C C C C C C C C C C C C C C C Heat index 90 84 89 94 94 90 84 87 92 93 90 84 89 Max heat 93 83 89 94 94 87 93 93 83 89 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 0006 12 18 00 06 12 18 00 06 12 18 00 Max/Min 87 77 87 77 87 77 87 77 87 Temp 87 80 77 83 87 80 77 83 87 80 77 83 87 80 77 83 87 80 Dewpt 73 73 73 73 74 73 73 73 74 73 72 73 73 73 73 73 72 72 PWind dir E E E E E E E E E Wind char GN GN GN GN GN GN GN GN GN Avg clouds B1 B1 B2 B2 B1 B1 B1 SC SC B2 B2 B2 B2 B1 B2 B2 B2 B2 PoP 12hr 50 50 50 40 50 60 60 60 60 Rain shwrs C C C C C C C C C C C L L L L L L L $$ PRZ007-190800- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 232 PM AST Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 74 89 74 89 75 Temp 85 79 76 74 76 83 87 89 85 79 76 74 76 83 87 89 85 80 77 75 77 83 Dewpt 67 67 67 67 67 68 68 70 70 69 68 69 68 67 70 66 68 69 69 69 67 65 RH 55 67 74 79 74 61 53 54 61 72 76 84 76 59 57 47 57 69 76 82 71 55 Wind dir E E NE NE NE E E SE E E NE NE E E E E E E E E E E Wind spd 16 9 6 8 5 10 14 14 13 9 5 4 4 8 14 16 14 9 9 6 6 10 Wind gust 26 25 25 26 26 Clouds SC FW CL FW FW SC CL SC SC FW FW FW FW SC SC SC SC SC SC SC SC B1 PoP 12hr 10 10 20 20 40 QPF 12hr 0.01 0.04 0.03 0.05 0.07 Rain shwrs S S S S S S S S S S S S S S S S C Heat index 88 81 86 91 94 89 82 85 92 92 88 83 85 Max heat 93 86 94 94 85 93 92 85 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 89 75 89 75 89 75 90 75 90 Temp 89 80 75 83 89 80 75 83 89 80 75 84 90 80 75 84 90 80 Dewpt 68 71 68 69 71 69 70 70 70 70 69 69 70 67 69 68 66 69 PWind dir E E E E E NE E E E Wind char GN LT GN LT GN LT BZ GN GN Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 SC SC SC SC PoP 12hr 40 10 20 20 20 30 40 20 30 Rain shwrs C S S S S S S S S S S C C C S S C C $$ PRZ008-190800- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 232 PM AST Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 73 86 74 86 73 Temp 82 77 75 73 75 81 85 86 83 78 76 74 75 81 85 86 82 77 75 73 75 81 Dewpt 74 73 71 70 68 71 73 75 75 74 73 72 69 72 73 75 75 74 72 71 71 72 RH 77 87 87 90 79 72 67 70 77 88 90 93 82 74 67 70 79 90 90 93 87 74 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 18 16 13 11 11 10 11 19 10 14 16 13 14 14 13 18 19 18 16 13 12 12 Clouds B1 SC CL CL CL FW FW B2 B2 SC SC CL CL SC SC B2 B2 B1 B1 SC SC SC PoP 12hr 30 60 30 60 40QPF 12hr 0.03 0.65 0.05 0.64 0.06 Rain shwrs C C S L L C C S S L L C C S S S Tstms S S S Heat index 89 84 91 95 90 85 91 95 89 85 Max heat 93 84 95 94 85 95 94 85 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 86 74 86 74 86 74 86 74 86 Temp 86 78 74 81 86 78 74 81 86 78 74 81 86 78 74 81 86 78 Dewpt 74 74 71 73 75 75 72 73 75 74 72 72 74 74 71 72 69 73 PWind dir E E E E E E E E E Wind char GN GN BZ GN BZ BZ BZ BZ BZ Avg clouds SC B2 B1 SC SC B2 B1 SC SC SC SC SC B1 B2 B1 B1 B1 B1 PoP 12hr 60 40 60 40 20 30 60 40 40 Rain shwrs L L C C L L C C S S S C L L C C C C Tstms S S S S S S $$ PRZ010-190800- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 232 PM AST Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 71 91 72 91 72 Temp 85 78 74 72 73 83 89 91 86 78 75 73 74 83 89 91 86 78 75 73 74 83 Dewpt 75 73 72 69 69 71 73 75 75 74 72 71 70 72 74 75 75 74 72 70 70 72 RH 72 85 93 90 87 67 59 60 70 88 90 93 87 70 61 60 70 88 90 90 87 70 Wind dir E E E E E E E NE E NE E E E E E E E E E E E E Wind spd 4 2 4 5 4 4 3 5 3 2 5 6 6 5 2 5 4 6 5 5 4 4 Clouds OV SC FW CL CL CL CL B2 B2 SC SC CL CL SC SC B2 B2 SC SC CL CL SC PoP 12hr 20 60 20 50 30 QPF 12hr 0.03 0.51 0.03 0.56 0.03 Rain shwrs L S S L L S S S S C C C C S Tstms S S S Heat index 94 87 97102 95 89 98102 95 89 Max heat 101 87 102 101 89 102 101 89 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 72 91 72 91 72 91 72 91 Temp 91 78 73 83 91 78 73 83 91 78 73 83 91 78 73 83 91 78 Dewpt 75 74 71 72 75 74 72 73 75 74 71 72 75 73 71 72 69 71 PWind dir E E NE E E E E E E Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC B2 SC SC SC B1 B2 B1 SC B1 SC SC SC B2 B2 B1 SC B2 PoP 12hr 70 30 50 50 50 20 60 50 60 Rain shwrs L L C C C C C C C C S S L L C C L L Tstms S S S S S S S S S S S S S $$ VIZ001-190800- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 232 PM AST Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 79 88 79 87 79 Temp 85 82 80 79 80 84 87 88 85 82 80 79 80 84 86 87 85 82 80 79 80 84 Dewpt 72 72 72 73 73 73 73 73 74 73 73 74 73 73 73 73 73 73 73 73 73 73 RH 65 72 77 82 79 70 63 61 70 74 79 85 79 70 65 63 67 74 79 82 79 70 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 18 21 21 20 20 21 23 19 19 19 21 20 23 23 19 18 19 20 21 21 19 17 Clouds SC CL SC SC SC B1 B1 SC SC SC SC FW FW SC SC B1 B1 CL CL SC SC B1 PoP 12hr 40 40 30 40 40 QPF 12hr 0.10 0.16 0.04 0.14 0.04 Rain shwrs S S S S C C C S S S C C C C S S C Heat index 91 86 84 83 84 91 94 96 93 87 85 83 84 90 93 94 91 87 85 83 84 90 Max heat 93 85 91 96 95 87 90 94 94 86 90 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 87 79 87 79 87 80 88 79 88 Temp 87 82 79 84 87 82 79 84 87 82 80 85 88 82 79 84 88 82 Dewpt 73 73 73 73 74 73 74 73 73 74 73 73 73 74 73 73 71 72 PWind dir E E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds B1 SC SC B1 SC SC SC SC SC B1 SC SC SC SC B1 B1 B2 B2 PoP 12hr 40 40 40 20 50 30 40 50 60 Rain shwrs C C C C C S S S C C C C C C C C L L $$ VIZ002-190800- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 232 PM AST Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 88 75 88 75 Temp 85 80 78 76 77 83 87 88 84 79 77 75 77 83 87 88 84 79 77 75 77 83 Dewpt 73 72 72 72 72 73 73 73 73 73 73 72 72 73 73 73 73 72 72 72 72 73 RH 67 77 82 87 85 72 63 61 70 82 87 90 85 72 63 61 70 79 85 90 85 72 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 17 18 19 17 16 18 19 19 18 18 19 18 19 19 19 18 18 17 16 17 13 16 Clouds SC CL SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 FW FW CL CL SC PoP 12hr 30 30 20 40 10 QPF 12hr 0.08 0.13 0.06 0.11 0.01 Rain shwrs S S S S C C C S S S S S S S C C S Heat index 91 84 89 94 96 91 83 88 94 96 91 83 88 Max heat 95 82 89 96 95 88 96 95 88 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 76 88 76 88 76 88 76 88 Temp 88 80 76 83 88 80 76 83 88 80 76 83 88 80 76 83 88 80 Dewpt 73 73 72 73 73 73 73 73 74 73 72 73 73 73 73 73 72 71 PWind dir E E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds SC SC SC SCSC SC SC SC SC B1 B1 B1 B1 B1 B2 B1 B1 B1 PoP 12hr 30 20 30 30 40 40 50 50 50 Rain shwrs C C S S S C C C C C C C C C C C C C $$