Places like Key West are very much influenced by the surrounding water temp - with the surrounding ocean temp in the winter typically in the low to mid 70s, it is actually not too common for Key West to reach or surpass 80 degrees in the winter time (the flip side is that it is very rare for the low temps to fall into the 50's, let alone the 40's - even when there have been temps in the 30's down to Miami).
Looking at 2010, the highest temp in January in Key West was 80 deg - it hit that temp 3 times. The highest temp in February 2010 was 80 deg - it only hit that temp one day of the month. By comparison, the highest temp at Key West (airport) in January 2011 was 79 degrees (1 day) and so far has been 79 degrees in February (2 days so far).....not so different this year vs. last...less 1 degree!
By June, when the water temps head into the mid-80's, it will be hard-pressed for the nighttime temps to fall below 80 degrees in Key West.....in fact, the low temp in Key West stayed 80 degrees or higher (including multiple nights of 'low' temps of 85 deg) for 79 nights during the summer of 2010 (3 nights, in May, 26 nights in June, 18 nights in July, 20 nights in August, 11 nights in September and one night in October)
tropicana wrote:gsytch wrote:Here along the Tampa Bay Gulf coast, we can't quite get to 80f as the sea breeze is holding us in the 70's, but it did hit 78f under bright, sunny skies. Spring is popping up all over - flowers, trees and pollen!

so jealous!
It did reach 80F on Feb 1/11 at Tampa FL, after an absence of 80s for all of December and January. The last 80 degree temperature prior to Feb 1 was Nov 30/10 when it reached 83F.
At Sarasota-Bradenton, it hasn;t reached 80F as yet this month, but it did touch 80F on January 25/11.
At Miami International, it has already hit 80F 9 times already this February (including today Feb 20). The warmest day so far has been February 10 when it reached an unseasonal 87F, the warmest day since Oct 30/10.
The mercury pushed into the 80s 8 times during January 2011.
It also reached into the 80s on one day in December 2010 ( 85F on Dec 1/10)
And November 2010 reached into the 80s 25 times .
-justin-