NWS Fall Temperature stats for Florida

Discussion in 'Florida Lawn Care Forum' started by zturncutter, Sep 22, 2013.

  1. zturncutter

    zturncutter LawnSite Bronze Member
    Posts: 1,308

    ...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.
     
  2. Keith

    Keith LawnSite Gold Member
    Posts: 3,977


    Dew points in the mid-60s? I don't think we've had a daytime dew point in the mid-60s since May :cry:
     
  3. zturncutter

    zturncutter LawnSite Bronze Member
    Posts: 1,308

    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 :clapping:
     
  4. Mark Oomkes

    Mark Oomkes LawnSite Fanatic
    Posts: 11,883

    Our dewpoint is 41 right now.

    Actual air temp is 58. :waving:
     
  5. zturncutter

    zturncutter LawnSite Bronze Member
    Posts: 1,308


    Go ahead rub it in, that's January weather here :waving:
     
  6. Keith

    Keith LawnSite Gold Member
    Posts: 3,977

    Overcast and raining right now. 79.4F...Dew point 77F. Was 85F and 78dp before I came home.
     
  7. Mark Oomkes

    Mark Oomkes LawnSite Fanatic
    Posts: 11,883

    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.
     
  8. zturncutter

    zturncutter LawnSite Bronze Member
    Posts: 1,308

    Been raining here for about 4 hours, good thing I left the pontoons on the equipment.
     
  9. We have now had 6 days in a row with low humidity
    Posted via Mobile Device
     
  10. Keith

    Keith LawnSite Gold Member
    Posts: 3,977

    Are you sure you're in Florida?
     

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