FOMY50 PGUM 180600 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 400 PM ChST Mon May 18 2026 GUZ001-181800- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 400 PM ChST Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 77 87 76 88 78 Temp 86 84 81 79 77 78 83 87 86 84 81 79 77 78 83 88 87 85 83 80 79 Dewpt 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 78 78 78 RH 75 80 88 94100 97 82 72 75 80 88 94100 97 82 70 72 77 85 94 97 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 14 13 11 10 10 13 16 16 14 13 12 11 10 13 17 17 16 16 14 12 11 Clouds B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 30 20 20 20 QPF 12hr 0.05 0.03 0.07 0.07 0.10 Rain shwrs S C C C C S S S S S S S S S S S S S S S S Heat index 98 94 89 91 98 97 94 89 92100 99 96 92 87 Max heat 98 97 88 91 98 96 87 92 100 98 90 Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 87 78 88 78 87 78 86 81 84 Temp 84 87 82 78 84 87 82 78 83 86 82 78 83 85 83 81 82 83 Dewpt 77 77 78 78 78 78 78 78 78 78 79 78 78 78 79 78 78 78 PWind dir E 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 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 20 30 30 30 30 30 Rain shwrs S S S S S S S S C C C C C C C C C C Tstms S S S S S S S S $$ MPZ001-181800- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 400 PM ChST Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 77 87 78 86 78 Temp 85 84 81 79 78 78 83 86 86 84 82 80 79 79 83 86 86 84 82 80 78 Dewpt 77 77 77 77 76 76 77 77 77 77 77 77 77 77 77 77 77 77 78 78 77 RH 77 80 88 94 94 94 82 75 75 80 85 91 94 94 82 75 75 80 88 94 97 Wind dir E E E E E E E E E E E E E E E E E E E E E Wind spd 14 14 13 12 12 14 17 16 14 14 14 12 11 14 17 18 17 16 14 12 11 Clouds B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 30 20 20 20 QPF 12hr 0.16 0.05 0.06 0.04 0.10 Rain shwrs S C C C C S S S S S S S S S S S S S S S S Heat index 96 93 89 84 92 98 97 94 90 85 92 97 96 94 90 86 Max heat 96 95 87 92 98 96 89 92 97 96 89 Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 1800 06 12 18 00 06 12 18 00 06 Max/Min 86 77 86 77 85 77 85 81 82 Temp 83 86 81 77 82 85 81 77 82 85 81 77 82 85 83 82 82 82 Dewpt 77 78 78 77 78 78 78 77 78 78 78 77 78 78 78 78 78 78 PWind dir E E E E E E E E E Wind char BZ GN GN GN GN GN GN GN GN Avg clouds SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 20 20 30 30 30 30 Rain shwrs S S S S S S S S S S C C C C C C C S Tstms S S S S S S S S $$ MPZ002-181800- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 400 PM ChST Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 76 87 77 88 76 Temp 86 84 81 78 77 77 83 87 86 84 82 79 77 78 84 88 87 85 82 79 77 Dewpt 76 76 76 76 76 76 77 77 76 76 76 77 77 77 77 76 77 77 77 77 77 RH 72 77 85 94 97 97 82 72 72 77 82 94100 97 80 68 72 77 85 94100 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 14 14 14 13 12 14 17 17 17 16 14 12 11 14 17 17 17 16 14 12 11 Clouds SC B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 PoP 12hr 30 30 20 20 20 QPF 12hr 0.07 0.11 0.05 0.03 0.10 Rain shwrs S C C C C S S S S S S S S S S S S S S S S Heat index 97 93 87 91 98 97 94 89 93 99 98 95 90 Max heat 97 96 86 91 98 96 87 93 99 97 88 Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 87 76 88 76 87 76 86 80 84 Temp 83 86 81 77 83 87 82 77 83 86 81 77 82 85 83 80 82 83 Dewpt 77 77 78 77 77 77 78 77 78 77 78 77 78 78 78 78 77 77 PWind dir E E E E E E E E E Wind char BZ GN GN GN GN GN GN GN GN Avg clouds B1 SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 20 20 30 30 30 30 Rain shwrs S S S S S S S S S S C C C C C C C S Tstms S S S $$ MPZ003-181800- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 400 PM ChST Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 76 87 77 88 76 Temp 86 84 81 78 77 77 83 87 86 84 81 79 77 78 83 88 87 85 82 79 77 Dewpt 77 76 76 76 76 76 77 77 77 76 76 77 77 77 77 77 77 77 77 77 77 RH 75 77 85 94 97 97 82 72 75 77 85 94100 97 82 70 72 77 85 94100 Wind dir E E E E E E E E E E E E E E E E E E E E E Wind spd 14 14 14 13 13 14 17 17 16 16 14 12 11 14 17 17 17 16 14 12 11 Clouds SC B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr30 30 20 20 20 QPF 12hr 0.04 0.11 0.06 0.03 0.08 Rain shwrs S C C C C S S S S S S S S S S S S S S S S Heat index 97 93 87 91 98 97 93 88 92 99 98 95 89 Max heat 97 96 86 91 98 96 87 92 99 97 88 Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 87 76 88 76 88 76 86 80 84 Temp 83 86 81 77 83 87 82 77 83 87 81 77 82 85 83 80 82 83 Dewpt 77 77 78 77 77 77 78 77 78 77 78 77 78 78 78 78 77 77 PWind dir E E E E E E E E E Wind char BZ GN GN GN GN GN GN GN GN Avg clouds SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 20 20 20 30 30 30 Rain shwrs S S S S S S S S S S S S C C C C C S Tstms S S S $$