FOMY50 PGUM 231806 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 405 AM ChST Mon Aug 24 2026 GUZ001-240600- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 405 AM ChST Mon Aug 24 2026 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 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 77 85 78 82 Temp 78 82 85 85 83 81 79 78 78 82 85 85 83 81 79 78 78 80 82 82 Dewpt 78 79 79 79 79 79 79 78 78 78 78 78 78 78 78 78 78 78 78 78 RH 100 91 82 82 88 94100100100 88 80 80 85 91 97100100 94 88 88 Wind dir SW S S S S SW SW SW SW SW SW W W W W W W W SW SW Wind spd 9 11 12 11 9 6 5 5 8 10 11 10 8 4 3 4 5 6 6 6 Clouds OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 70 70 50 40 40 QPF 12hr 0.61 0.60 0.35 0.52 0.37 Rain shwrs L L L L 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 S S S S S S S S Heat index 92 98 97 94 90 84 91 96 96 93 90 85 88 91 91 Max heat 92 98 96 89 91 96 95 89 88 91 High Surf Y Y Y Date Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 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 84 78 85 79 87 79 86 Temp 80 78 82 84 81 78 82 84 81 79 84 86 83 79 83 85 Dewpt 78 78 78 78 79 78 78 79 79 79 79 79 79 79 79 79 PWind dir W SW W W W W W W Wind char LT LT GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B2 B2 OV OV B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 60 60 60 50 40 30 Rain shwrs C C C C L L L L L C C C C C C C Tstms S S S S S S S S S S S S S S S S $$ MPZ001-240600- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 405 AM ChST Mon Aug 24 2026 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 85 77 84 77 83 Temp 79 82 85 84 83 80 78 77 77 81 83 83 82 80 78 77 78 80 83 82 Dewpt 79 79 79 79 79 79 78 77 77 78 78 78 78 78 78 77 78 78 78 78 RH 100 91 82 85 88 97100100100 91 85 85 88 94100100100 94 85 88 Wind dir S S S S S SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW Wind spd 12 13 13 11 10 9 9 9 9 10 11 10 9 6 4 3 4 4 5 5 Clouds OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 70 70 50 40 40 QPF 12hr 0.33 0.32 0.42 0.30 0.16 Rain shwrs L L L L C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S Heat index 92 97 96 93 89 89 94 93 91 86 88 92 92 Max heat 92 97 95 85 89 94 92 85 88 92 High Surf Y Y YDate Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 76 84 77 83 78 83 79 84 Temp 79 77 81 84 81 78 81 83 80 78 81 82 81 79 82 84 Dewpt 79 77 78 79 79 78 79 79 79 78 79 79 79 79 79 79 PWind dir SW SW SW SW W W W W Wind char LT LT GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B2 B2 OV OV B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 60 60 60 50 40 30 Rain shwrs C C C C L L L L L C C C C C C C Tstms S S S S S S S S S S S S S S S S $$ MPZ002-240600- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 405 AM ChST Mon Aug 24 2026 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 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 87 78 86 77 85 Temp 79 83 86 86 84 82 80 79 79 83 86 85 83 81 79 77 78 82 85 84 Dewpt 79 79 79 79 79 79 79 78 78 78 78 78 78 78 78 77 78 78 78 78 RH 100 88 80 80 85 91 97 97 97 85 77 80 85 91 97100100 88 80 82 Wind dir S S S S S S S S S S SW SW SW SW SW SW S S S S Wind spd 11 11 11 10 9 8 8 8 8 8 8 8 5 4 3 2 2 2 2 3 Clouds OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 70 70 50 40 40 QPF 12hr 0.23 0.21 0.10 0.19 0.11 Rain shwrs L L L L 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 S S S S S S S S Heat index 85 94100 99 96 93 89 85 86 93 98 97 94 89 91 96 96 Max heat 94 100 98 91 93 98 96 88 91 96 High Surf Y Y Y Date Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 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 86 78 83 78 84 79 85 Temp 81 78 82 85 81 78 81 82 80 78 82 84 81 79 83 85 Dewpt 79 78 79 79 79 78 79 79 79 78 79 79 79 79 79 79 PWind dir S S SW SW W W W W Wind char LT LT LT GN GN GN GN GN Avg clouds B1 B1 B1 B1 B2 OV OV OV B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 60 60 60 50 40 30 Rain shwrs C C C C L L L L L C C C C C C C Tstms S S S S S S S S S S S S S S S S $$ MPZ003-240600- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 405 AM ChST Mon Aug 24 2026 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 87 78 86 77 85 Temp 80 84 87 86 84 82 80 79 79 83 86 85 83 81 79 78 78 82 85 85 Dewpt 79 79 79 79 79 79 79 78 78 78 78 78 78 78 78 78 78 78 78 78 RH 97 85 77 80 85 91 97 97 97 85 77 80 85 91 97100100 88 80 80 Wind dir S S S S S S S S S S SW SW SW S S S S S S S Wind spd 11 11 10 9 9 8 6 6 8 9 8 8 5 3 2 2 2 3 2 2 Clouds OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 70 70 50 40 40 QPF 12hr 0.22 0.15 0.10 0.16 0.10 Rain shwrs L L L L C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S Heat index 86 95100100 97 93 89 85 86 93 98 97 94 90 91 97 96 Max heat 85 95 100 99 92 93 98 96 88 91 97 High Surf Y Y Y Date Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 78 86 77 83 78 85 79 85 Temp 81 78 83 85 81 78 81 83 80 78 82 84 82 79 83 85 Dewpt 79 78 79 78 79 78 79 79 79 78 79 79 79 79 79 79 PWind dir S S S SW W W W W Wind char LT LT LT GN GN GN GN GN Avg clouds B1 B1 B1 B1 B2 OV OV OV B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 60 60 60 50 40 30 Rain shwrs C C C C L L L L L C C C C C C C Tstms S S S S S S S S S S S S S S S S $$