FOMY50 PGUM 191640 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 240 AM ChST Wed May 20 2026 GUZ001-200600- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 240 AM ChST Wed May 20 2026 Date Wed 05/20/26 Thu 05/21/26 Fri 05/22/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 88 78 87 78 88 Temp 77 78 83 88 87 85 83 80 79 79 84 87 87 85 82 80 78 79 84 87 87 Dewpt 77 77 77 77 77 78 78 78 77 77 77 77 77 78 78 78 78 78 78 78 78 RH 100 97 82 70 72 80 85 94 94 94 80 72 72 80 88 94100 97 82 75 75 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 11 13 16 17 16 14 13 12 11 14 17 16 14 13 12 10 10 12 16 16 14 Clouds SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 30 30 QPF 12hr 0.10 0.06 0.08 0.13 0.15 Rain shwrs S S S S S S S S S S S S S C C C C C C C C Heat index 93100 99 97 92 87 93 99 99 96 91 85 94100 99 Max heat 93 100 99 90 93 99 98 90 94 100 Date Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 Tue 05/26/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 78 87 78 86 81 84 81 86 Temp 82 78 83 86 82 78 83 85 83 81 82 83 82 81 84 85 Dewpt 79 78 78 78 78 78 78 78 79 78 78 78 78 78 77 77 PWind dir E E E E E E E SE Wind char GN GN GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B1 B2 B2 PoP 12hr 30 30 30 30 50 50 50 50 Rain shwrs C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S $$ MPZ001-200600- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 240 AM ChST Wed May 20 2026 Date Wed 05/20/26 Thu 05/21/26 Fri 05/22/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 86 78 86 77 86 Temp 78 79 83 86 86 84 82 80 78 79 83 86 86 84 81 79 77 78 82 86 85 Dewpt 77 77 77 77 77 77 77 77 77 77 77 77 77 78 78 78 77 78 78 78 78 RH 97 94 82 75 75 80 85 91 97 94 82 75 75 82 91 97100100 88 77 80 Wind dir E E E E E E E E E E E E E E E E E E E E E Wind spd 12 14 17 17 17 17 16 13 12 14 17 17 14 13 12 11 10 12 14 14 14 Clouds SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 30 30 QPF 12hr 0.04 0.03 0.06 0.10 0.07 Rain shwrs S S S S S S S S S S S S S C C C C C C C C Heat index 92 97 96 94 90 85 92 98 97 94 90 91 98 97 Max heat 92 97 96 89 92 98 96 88 91 98 Date Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 Tue 05/26/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 77 85 77 85 81 82 81 84 Temp 81 77 82 85 81 77 82 85 83 82 82 82 82 82 83 83 Dewpt 78 77 78 78 78 77 78 78 78 78 78 78 78 78 77 77 PWind dir E E E E E E E E Wind char GN GN GN GN GN BZ BZ GN Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 30 30 30 30 50 50 50 40 Rain shwrs C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S $$ MPZ002-200600- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 240 AM ChST Wed May 20 2026 Date Wed 05/20/26 Thu 05/21/26 Fri 05/22/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 88 76 87 76 88 Temp 77 78 84 88 87 85 82 79 77 77 83 87 86 84 81 78 77 77 83 88 87 Dewpt 76 76 76 76 76 76 76 76 76 76 77 77 77 78 78 78 77 77 77 77 77 RH 97 94 77 68 70 75 82 91 97 97 82 72 75 82 91100100100 82 70 72 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 14 17 18 17 17 16 13 11 13 17 16 14 14 13 11 10 12 14 16 14 Clouds SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 30 30 QPF 12hr 0.05 0.04 0.06 0.06 0.05 Rain shwrs S S S S S S S S S S S S S C C C C C C C C Heat index 92 99 98 94 89 91 98 98 95 89 92100 99 Max heat 92 99 97 87 91 98 97 88 92 100 Date Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 Tue 05/26/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 76 87 76 86 80 84 80 85 Temp 82 77 83 86 81 77 82 85 83 80 82 83 82 81 83 85 Dewpt 77 77 77 77 78 77 78 78 78 77 77 77 77 77 77 77 PWind dir E E E E E E E SE Wind char GN GN GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 30 30 30 40 50 50 50 40 Rain shwrs C C C C C C C C C C C C C C C C Tstms S S S S S S S S S $$ MPZ003-200600- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 240 AM ChST Wed May 20 2026 Date Wed 05/20/26 Thu 05/21/26 Fri 05/22/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 88 76 87 76 88 Temp 77 78 83 88 87 85 82 79 77 77 83 87 86 84 81 78 77 77 83 88 87 Dewpt 76 76 76 76 76 76 76 76 76 76 77 77 77 78 78 78 77 77 77 77 77 RH 97 94 80 68 70 75 82 91 97 97 82 72 75 82 91100100100 82 70 72 Wind dir E E E E E E E E E E E E E E E E E E E E E Wind spd 12 14 17 18 17 17 16 13 11 13 16 16 14 14 13 11 10 12 14 16 14 Clouds SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 30 30 QPF 12hr 0.05 0.03 0.06 0.07 0.04 Rain shwrs S S S S S S S S S S S S S C C C C C C C C Heat index 92 99 97 94 89 91 99 98 95 89 92100 99 Max heat 92 99 97 87 91 99 97 88 92 100 Date Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 Tue 05/26/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 76 88 76 86 80 84 80 85 Temp 82 77 83 87 81 77 82 85 83 80 82 83 82 81 83 85 Dewpt 77 77 77 77 78 77 78 78 78 77 77 77 77 77 77 77 PWind dir E E E E E E E SE Wind char GN GN GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 30 30 30 40 50 50 50 40 Rain shwrs C C C C C C C C C C C C C C C C Tstms S S S S S S S S S $$