Wednesday, June 24, 2009

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)

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