FOUS52 KKEY 180802 PFMKEY Point Forecast Matrices National Weather Service Key West FL 402 AM EDT Mon May 18 2026 FLZ078-182000- Key West-Monroe FL 24.55N 81.75W Elev. 3 ft 402 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 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 91 80 91 80 90 Temp 82 83 88 89 89 84 83 82 81 82 87 89 89 84 83 82 80 82 87 88 88 84 Dewpt 75 75 76 76 76 75 75 75 75 75 75 75 75 74 74 74 74 74 75 74 74 73 RH 79 77 68 66 66 74 77 79 82 79 68 64 64 72 74 77 82 77 68 63 63 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 16 14 16 14 14 16 16 16 13 12 11 11 12 13 14 13 12 11 11 11 10 12 Clouds SC FW SC SC FW SC SC FW SC FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 40 40 40 30 20 QPF 12hr 0.06 0.09 0 0.02 0 Rain shwrs C C C C C C C C C C C C C C C C C S S S S S Tstms S S S S S S S S S S S S S S S S S S S S S S Heat index 89 90 99100100 92 90 89 87 89 96 99 99 91 90 88 85 88 96 97 97 90 Max heat 90 100 102 90 89 99 102 90 88 98 98 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 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 91 81 92 82 93 82 92 Temp 82 83 89 86 82 83 89 86 83 84 90 87 84 84 90 87 Dewpt 73 73 73 72 73 73 74 73 75 75 75 75 75 76 76 75 PWind dir E E E SE SE SE E E Wind char GN GN GN LT GN GN GN GN Avg clouds FW SC FW FW FW SC SC FW FW FW FW FW FW SC SC SC PoP 12hr 20 20 10 10 10 5 30 10 Rain shwrs S S S S S S S S C C Tstms S S S S S S $$ FLZ077-182000- Marathon-Monroe FL 24.72N 81.04W Elev. 5 ft 402 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 87 79 86 80 86 Temp 82 82 85 85 85 83 82 82 81 82 84 85 85 83 82 82 80 82 84 85 85 83 Dewpt 75 76 76 75 75 75 75 75 75 75 75 75 75 75 74 74 74 74 74 74 73 73 RH 79 82 75 72 72 77 79 79 82 79 74 72 72 77 77 77 82 77 72 70 67 72 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 16 16 16 14 14 16 16 16 13 12 11 11 12 13 13 13 12 11 11 11 11 12 Clouds FW SC SC SC SC SC SC SC SC SC SC SC FW SC FW FW SC SC FW FW FW FW PoP 12hr 40 40 40 30 20 QPF 12hr 0 0.05 0.02 0 0 Rain shwrs C C C C C C C C C C C C C C C C C S S S S S Tstms S S S S S S S S S S S S S S S S S S S S S S Heat index 89 89 94 94 94 90 89 89 87 89 92 94 94 90 88 88 85 88 91 93 92 89 Max heat 89 96 95 89 89 94 95 90 88 93 93 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 80 87 80 87 81 88 82 88 Temp 82 82 85 84 83 82 86 85 84 83 86 86 84 84 87 86 Dewpt 73 73 73 73 73 73 73 74 74 75 75 75 75 75 75 75 PWind dir E E E SE SE SE E E Wind char GN GN LT LT LT GN GN GN Avg clouds FW SC FW FW FW SC SC FW FW SC FW FW FW SC SC SC PoP 12hr 20 20 10 10 10 10 40 20 Rain shwrs S S S S S S S S C C S S Tstms S S S S S S S S $$