Key West has a tropical climate with warm temperatures throughout the year, but summers are hot and humid, and prone to squalls and hurricanes. Winters are warm and dry, making for a pleasant climate. The presence of sea breezes also makes it relatively mild.

Key West, FL Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Highest Temperature 24 24 26 28 30 31 32 32 31 29 27 25 Lowest Temperature 18 19 21 22 25 26 26 26 26 24 22 19 Precipitation 51 46 43 44 88 129 92 128 149 112 72 51 　New York Highest Temperature 3 5 10 16 22 27 30 29 25 19 12 6 Lowest Temperature -4 -3 2 7 12 17 20 20 16 10 5 -1 Precipitation 87 83 104 107 112 93 111 102 99 90 114 99 Precipitation number of days 11 10 12 11 12 10 10 10 8 8 9 10

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The time difference of Key West is UTC-5 UTC-4 for daylight saving time Winter time Daylight savings time UTC 0:00 1:00 5:00 1:00 2:00 6:00 2:00 3:00 7:00 3:00 4:00 8:00 4:00 5:00 9:00 5:00 6:00 10:00 6:00 7:00 11:00 7:00 8:00 12:00 8:00 9:00 13:00 9:00 10:00 14:00 10:00 11:00 15:00 11:00 12:00 16:00 12:00 13:00 17:00 13:00 14:00 18:00 14:00 15:00 19:00 15:00 16:00 20:00 16:00 17:00 21:00 17:00 18:00 22:00 18:00 19:00 23:00 19:00 20:00 0:00 20:00 21:00 1:00 21:00 22:00 2:00 22:00 23:00 3:00 23:00 0:00 4:00