Florida Chill Hours...

Another map of chill hours. I love how every one is different...


Map shows hours below 45 degrees received to February 10th in 75% of winters.

I guess this puts DeLand firmly in the 350-hour range.

From IFAS:

The model most used in the SE United States is the total number of hours below 45°F and above 32°F. Temperatures from 40 to 50°F are most effective, with higher or lower temperatures being less effective. Unseasonal high temperatures greater than 60°F during November - February cancel or negate some of the accumulated chilling. The effect of higher temperatures on previously accumulated chilling has not been clearly defined and higher temperatures are thought to affect only recently acquired chilling.

I thought this table was very useful:

Year	Location
	Tallahassee (Monticello)**		Jacksonville (Macclenny) **	Alachua	Orlando (Avalon) **	Tampa (Dover) **	Ft. Pierce	Immokalee
1999 - 2000	NA		NA	490	251	271	141	168
200-2001	NA		NA	609	388	394	223	217
2001-2002	NA		NA	407	156	170	95	88
2002-2003	NA		759	751	388	440	267	256
2003-2004	674		518	538	227	284	126	180
2004-2005	602		542	517	196	222	139	177
2005-2006	590		545	560	212	298	153	195
2006-2007	564		456	438	98	167	75	81
http://fawn.ifas.ufl.edu/data/chart_historical.asp NA: Not Available. **(Closest Weather Station)