Register free!
Search
 
     

Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 09-22-2013, 08:18 PM
zturncutter's Avatar
zturncutter zturncutter is online now
LawnSite Bronze Member
 
Join Date: Feb 2003
Location: Interior South Florida
Posts: 1,220
NWS Fall Temperature stats for Florida

...Autumn has officially begun so when is it going to cool off?...

Astronomically speaking autumn began at 4:44 PM Sunday September
22...but across west central and southwest Florida the temperatures
are anything but fall-like. We are continuing to have rather high
humidity with dew points in the mid 60s to lower 70s during the
afternoon hours...along with high temperatures in the upper 80s to
lower 90s.

During most years we do not see the first shot of cooler drier air
until the middle of October...albeit usually is rather short lived
lasting only a day or two...with the real cool down not occurring
until November. A good way to examine the timing of the first cool
down is by looking at overnight low temperatures. The overnight low
temperatures are highly dependent on a few factors...not the least
being the amount of cloud cover...how strong the winds are and the
amount of moisture in the air near the ground measured by looking
at the dew point. In general overnight low temperatures cannot
fall below the dew point...therefore if the dew points are still in
the mid 60s to lower 70s as they are now...then the overnight low
temperatures will most likely also be in the mid 60s to lower 70s
unless a cool front moves through during the night. So to see when
the first cool front moves across the region lets look at the dates
when low temperatures fall below different thresholds at some
locations.

Examining the tables below we do see that the average time of the
first real cool front appears to be during mid-October. This is
when temperatures generally fall into the mid 50s across inland
portions of the Nature Coast and below 60 degrees elsewhere across
west central and southwest Florida. The only exception is near the
coast where the water keeps temperatures higher and these areas
take longer to fall below 60 degrees...as seen at St. Petersburg.


Date of first low temperature <= 60 degrees fahrenheit

records
location earliest latest average began

Chiefland 5 se Aug 27 1969 Oct 25 1959 Sep 27 1956
Inverness 3 se Sep 09 1997 Oct 25 1959 Oct 06 1948
Bushnell 2 E Sep 09 1997 Nov 03 1969 Oct 06 1948
Weeki Wachee Sep 07 1982 Oct 23 1998 Oct 02 1969
St Leo Sep 14 2001 Nov 08 1919 Oct 12 1895
Tarpon Springs Sep 19 1981* Nov 15 1919 Oct 12 1892
Tampa Sep 19 1981 Nov 15 1919 Oct 17 1890
St Petersburg Oct 01 1920 Dec 04 1986 Oct 26 1914
Plant City Sep 15 1918 Nov 05 1900 Oct 10 1893
Lakeland Sep 19 1981 Nov 14 1946 Oct 15 1946
Bartow Sep 16 1913 Nov 14 1946 Oct 13 1892
Winter Haven Sep 19 1981 Nov 14 1946 Oct 17 1941
Mountain Lake Sep 19 1981 Nov 04 2007* Oct 12 1935
Parrish Sep 19 1981 Nov 03 2007 Oct 14 1958
Sarasota-Bradenton Sep 20 1981 Nov 04 2007 Oct 15 1948
Myakka River St pk Sep 19 1981 Nov 04 1969 Oct 11 1956
Wauchula 2 N Sep 19 1981 Nov 07 1941 Oct 13 1933
Avon Park 2 W Sep 20 1981 Nov 14 1946 Oct 16 1902
Arcadia Sep 16 1962 Nov 19 1911 Oct 12 1901
Archbold Bio stn Sep 08 1997 Nov 04 2007 Oct 05 1969
Venice Sep 27 1956 Nov 05 1998* Oct 18 1956
Punta Gorda 4 ESE Oct 02 2001* Nov 05 1985 Oct 18 1965
Fort Myers Oct 01 1920* Dec 03 1986 Oct 26 1902

---------------------------------------------------------------------


Date of first low temperature <= 55 degrees fahrenheit

records
location earliest latest average began

Chiefland 5 se Sep 10 1963 Oct 27 1994 Oct 07 1956
Inverness 3 se Sep 16 1956 Nov 04 1985 Oct 15 1948
Bushnell 2 E Sep 27 1956 Nov 05 1950 Oct 15 1948
Weeki Wachee Sep 19 1981 Nov 02 2007 Oct 13 1969
St Leo Sep 19 1981 Nov 15 1919 Oct 20 1895
Tarpon Springs Sep 20 1981 Nov 25 1922 Oct 22 1892
Tampa Sep 22 1897 Nov 25 1948* Oct 27 1890
St Petersburg Oct 01 1920 Dec 15 1998* Nov 07 1915
Plant City Sep 20 1981 Nov 22 1986 Oct 20 1893
Lakeland Oct 03 1984 Nov 25 1948 Oct 22 1946
Bartow Sep 24 1916 Nov 25 1922 Oct 23 1892
Winter Haven Oct 04 1974 Dec 03 1986 Oct 27 1941
Mountain Lake Sep 21 1938 Nov 15 2003* Oct 20 1935
Parrish Oct 02 1984 Nov 14 2003 Oct 21 1958
Sarasota-Bradenton Oct 01 1920 Nov 24 1994 Oct 26 1911
Myakka River St pk Oct 02 1984 Nov 21 1994 Oct 22 1956
Wauchula 2 N Sep 27 1956 Nov 22 1986 Oct 23 1933
Avon Park 2 W Oct 01 1920 Nov 25 1948* Oct 26 1902
Arcadia Oct 01 1920 Dec 04 1986 Oct 25 1901
Archbold Bio stn Sep 29 2006 Dec 03 1986 Oct 19 1969
Venice Oct 03 1974 Dec 03 1986 Oct 29 1956
Punta Gorda 4 ESE Oct 10 2000 Dec 04 1986 Oct 30 1965
Fort Myers Oct 01 1920 Dec 11 1994 Nov 04 1902

---------------------------------------------------------------------


Date of first low temperature <= 50 degrees fahrenheit
year
records
location earliest latest average began

Chiefland 5 se Sep 20 1981 Nov 06 1998 Oct 14 1956
Inverness 3 se Oct 02 2001* Nov 21 1986 Oct 23 1948
Bushnell 2 E Oct 02 1984 Nov 14 2003 Oct 24 1948
Weeki Wachee Sep 20 1981 Nov 14 2003 Oct 19 1969
St Leo Sep 22 1897 Nov 30 1958 Oct 30 1895
Tarpon Springs Oct 01 1920 Dec 05 1919 Nov 01 1892
Tampa Oct 11 1906 Dec 15 1998* Nov 07 1890
St Petersburg Oct 17 1943 Jan 02 1987 Nov 20 1915
Plant City Oct 04 1929 Nov 25 1948 Oct 28 1893
Lakeland Oct 10 2000 Dec 11 1958 Nov 02 1946
Bartow Oct 01 1920 Dec 16 1998 Nov 02 1892
Winter Haven Oct 10 2000 Dec 16 1998 Nov 05 1941
Mountain Lake Oct 08 1987 Dec 05 1946 Oct 30 1935
Parrish Oct 10 1976 Dec 16 1998 Nov 02 1958
Sarasota-Bradenton Oct 02 1920 Dec 19 2001 Nov 05 1911
Myakka River St pk Oct 08 1987 Dec 15 1998 Nov 01 1956
Wauchula 2 N Oct 10 2000 Dec 04 1986 Nov 01 1933
Avon Park 2 W Oct 04 1929 Dec 12 1994 Nov 04 1902
Arcadia Oct 01 1920 Dec 12 1994 Nov 01 1901
Archbold Bio stn Oct 08 2010 Dec 12 1994 Oct 29 1969
Venice Oct 14 1977 Dec 16 1998 Nov 09 1956
Punta Gorda 4 ESE Oct 14 1977 Jan 02 1987 Nov 09 1965
Fort Myers Oct 18 1977 Jan 16 1972 Nov 18 1902

* last of multiple occurrences


As a side note...for those who miss or would like to see where
the foliage has begun to change color across the United States...
visit the usda Forest service web site listed below.

Http://www.Fs.Fed.US/fallcolors/2013/

For more local climate information...please see our web Page at
http://weather.Gov/tampabay and click on the "local" link under
the climate subsection on the left side of the Page.
__________________
ZTurnCutter
Reply With Quote
  #2  
Old 09-22-2013, 09:31 PM
Keith's Avatar
Keith Keith is offline
LawnSite Gold Member
 
Join Date: Dec 1999
Location: Central Florida
Posts: 3,795
Quote:
Originally Posted by zturncutter View Post

Astronomically speaking autumn began at 4:44 PM Sunday September
22...but across west central and southwest Florida the temperatures
are anything but fall-like. We are continuing to have rather high
humidity with dew points in the mid 60s to lower 70s during the
afternoon hours...along with high temperatures in the upper 80s to
lower 90s.

Dew points in the mid-60s? I don't think we've had a daytime dew point in the mid-60s since May
Reply With Quote
  #3  
Old 09-23-2013, 07:36 AM
zturncutter's Avatar
zturncutter zturncutter is online now
LawnSite Bronze Member
 
Join Date: Feb 2003
Location: Interior South Florida
Posts: 1,220
Quote:
Originally Posted by Keith View Post
Dew points in the mid-60s? I don't think we've had a daytime dew point in the mid-60s since May
Looks like they are going to be high this week, Sauna like until the end of the week. At least the clouds will give us some shade
__________________
ZTurnCutter
Reply With Quote
  #4  
Old 09-23-2013, 12:29 PM
Mark Oomkes Mark Oomkes is online now
LawnSite Fanatic
 
Join Date: Dec 2000
Location: Grand Rapids, MI
Posts: 6,670
Quote:
Originally Posted by Keith View Post
Dew points in the mid-60s? I don't think we've had a daytime dew point in the mid-60s since May
Our dewpoint is 41 right now.

Actual air temp is 58.
__________________
"Science is the belief in the ignorance of the experts" – Richard Feynman

I like my guns like Obama likes his voters: Undocumented

Criminals obey gun laws like politicians follow their oaths of office
Reply With Quote
  #5  
Old 09-23-2013, 01:38 PM
zturncutter's Avatar
zturncutter zturncutter is online now
LawnSite Bronze Member
 
Join Date: Feb 2003
Location: Interior South Florida
Posts: 1,220
Quote:
Originally Posted by Mark Oomkes View Post
Our dewpoint is 41 right now.

Actual air temp is 58.

Go ahead rub it in, that's January weather here
__________________
ZTurnCutter
Reply With Quote
  #6  
Old 09-23-2013, 03:13 PM
Keith's Avatar
Keith Keith is offline
LawnSite Gold Member
 
Join Date: Dec 1999
Location: Central Florida
Posts: 3,795
Overcast and raining right now. 79.4F...Dew point 77F. Was 85F and 78dp before I came home.
Reply With Quote
  #7  
Old 09-23-2013, 03:17 PM
Mark Oomkes Mark Oomkes is online now
LawnSite Fanatic
 
Join Date: Dec 2000
Location: Grand Rapids, MI
Posts: 6,670
Up to 63 air temp and 42 for a dewpoint.

It's a beautiful fall day.

It was about 37-38 at my shop. Lots of frost too.
__________________
"Science is the belief in the ignorance of the experts" – Richard Feynman

I like my guns like Obama likes his voters: Undocumented

Criminals obey gun laws like politicians follow their oaths of office
Reply With Quote
  #8  
Old 09-23-2013, 09:55 PM
zturncutter's Avatar
zturncutter zturncutter is online now
LawnSite Bronze Member
 
Join Date: Feb 2003
Location: Interior South Florida
Posts: 1,220
Been raining here for about 4 hours, good thing I left the pontoons on the equipment.
__________________
ZTurnCutter
Reply With Quote
  #9  
Old 09-23-2013, 09:58 PM
Florida Gardener's Avatar
Florida Gardener Florida Gardener is online now
LawnSite Fanatic
 
Join Date: Sep 2008
Location: Humid S. Fl. with sights set on San Diego
Posts: 5,062
We have now had 6 days in a row with low humidity
Posted via Mobile Device
Reply With Quote
  #10  
Old 09-23-2013, 10:26 PM
Keith's Avatar
Keith Keith is offline
LawnSite Gold Member
 
Join Date: Dec 1999
Location: Central Florida
Posts: 3,795
Are you sure you're in Florida?
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.com™ - Moose River Media
All times are GMT -4. The time now is 12:08 AM.

Page generated in 0.07412 seconds with 9 queries