Record envelope, standing records and threshold days for St Marks 5 SSE (USC00087867), Florida, United States, with 75 years of record.
Key Facts for St Marks 5 SSE
St Marks 5 SSE (USC00087867) is a weather station in Florida, United States at 30.10 latitude and -84.17 longitude, 3 m (10 ft) above sea level.
The station reports from 1907 to 1981, 75 years of record.
1,464 records set at St Marks 5 SSE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
St Marks 5 SSE tied a daily record low maximum temperature of 26.7 C (80.1 F) on 21 September 1981.
About the Station
Location: Florida, United States, 30.10 latitude, -84.17 longitude.
Elevation: 3 m (10 ft).
Period of record: 1907 to 1981, 75 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at St Marks 5 SSE. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at St Marks 5 SSE, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
27.8 C (82.0 F)
-11.1 C (12.0 F)
n/a
n/a
Feb
29.4 C (84.9 F)
-8.3 C (17.1 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-7.2 C (19.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-0.6 C (30.9 F)
n/a
n/a
May
38.9 C (102.0 F)
5.6 C (42.1 F)
n/a
n/a
Jun
42.2 C (108.0 F)
11.7 C (53.1 F)
n/a
n/a
Jul
40.0 C (104.0 F)
15.6 C (60.1 F)
n/a
n/a
Aug
38.9 C (102.0 F)
15.0 C (59.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
5.6 C (42.1 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-1.1 C (30.0 F)
n/a
n/a
Nov
30.0 C (86.0 F)
-6.7 C (19.9 F)
n/a
n/a
Dec
27.2 C (81.0 F)
-11.7 C (10.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at St Marks 5 SSE still stand. 1915 holds the most, with 93.
Standing records at St Marks 5 SSE by the year they were set
Year set
Standing records
1907
8
1908
41
1909
47
1910
52
1911
21
1912
4
1913
33
1914
31
1915
93
1916
18
1942
30
1943
32
1944
31
1945
19
1946
31
1947
42
1948
48
1949
34
1950
39
1951
30
1952
20
1953
25
1954
27
1955
33
1956
33
1957
30
1958
26
1959
27
1960
21
1961
34
1962
29
1963
30
1964
29
1965
10
1966
36
1967
33
1968
26
1969
26
1970
19
1971
25
1972
23
1973
16
1974
32
1975
22
1976
21
1977
31
1978
22
1979
20
1980
22
1981
32
Wettest Day of Each Month
Apr: 212.3 mm (8.4 in)
The wettest day on record for each calendar month at St Marks 5 SSE. The most was 212.3 mm (8.4 in) on 28 April 1964.
Record daily precipitation for each month at St Marks 5 SSE
Month
Record daily precipitation (mm)
Date
Jan
152.4 mm (6.0 in)
17 January 1915
Feb
154.9 mm (6.1 in)
27 February 1964
Mar
190.5 mm (7.5 in)
17 March 1946
Apr
212.3 mm (8.4 in)
28 April 1964
May
106.7 mm (4.2 in)
13 May 1954
Jun
183.1 mm (7.2 in)
17 June 1960
Jul
177.8 mm (7.0 in)
30 July 1948
Aug
170.4 mm (6.7 in)
7 August 1952
Sep
195.8 mm (7.7 in)
30 September 1915
Oct
102.4 mm (4.0 in)
8 October 1976
Nov
101.6 mm (4.0 in)
6 November 1912
Dec
114.3 mm (4.5 in)
9 December 1907
Period of Record Coverage
1907 to 1981
Complete yearUnder 90 percent of days
50 years of record at St Marks 5 SSE, 1907 to 1981. 13 years have data for under 90 percent of days and are left out of rankings: 1907, 1908, 1911, 1912, 1913, 1914, 1916, 1942 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 32 complete years at St Marks 5 SSE, 1910 to 1979. Blue stripes are years cooler than the station's own mean of 20.1 C (68.1 F); red stripes are warmer. The coolest year was 1910, at 18.6 C (65.5 F), and the warmest was 1949, at 21.6 C (70.9 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at St Marks 5 SSE as warming stripes, 1910 to 1979
Year
Annual mean temperature
Difference from the station mean
1910
18.6 C
-1.43 C
1915
20.1 C
+0.04 C
1943
20.2 C
+0.15 C
1946
21.2 C
+1.14 C
1947
20.6 C
+0.57 C
1948
20.9 C
+0.84 C
1949
21.6 C
+1.54 C
1950
20.2 C
+0.16 C
1951
20.2 C
+0.14 C
1952
20.1 C
+0.08 C
1953
20.5 C
+0.40 C
1954
19.9 C
-0.17 C
1955
20.2 C
+0.16 C
1956
20.1 C
+0.00 C
1957
20.8 C
+0.69 C
1958
19.6 C
-0.48 C
1959
20.4 C
+0.38 C
1960
19.7 C
-0.40 C
1961
19.8 C
-0.24 C
1962
20.2 C
+0.15 C
1963
19.6 C
-0.47 C
1966
19.6 C
-0.47 C
1967
20.1 C
+0.03 C
1968
19.4 C
-0.70 C
1970
19.7 C
-0.41 C
1971
20.2 C
+0.18 C
1973
20.0 C
-0.07 C
1974
20.3 C
+0.20 C
1975
20.3 C
+0.26 C
1976
19.0 C
-1.03 C
1977
19.3 C
-0.72 C
1979
19.5 C
-0.53 C
The fitted trend in annual mean temperature here over 1910 to 1979 is -0.05 C (-0.19 to 0.10) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.2) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at St Marks 5 SSE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.05 C (-0.19 to 0.10) per decade
-0.1 F (-0.3 to 0.2) per decade
1910 to 1979
32
Not clearly different from zero
Mean daily maximum
-0.09 C (-0.22 to 0.04) per decade
-0.2 F (-0.4 to 0.1) per decade
1910 to 1979
32
Not clearly different from zero
Mean daily minimum
0.0 C (-0.2 to 0.2) per decade
0.0 F (-0.3 to 0.4) per decade
1910 to 1979
32
Not clearly different from zero
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1907 to 1981
Yearly extremes at St Marks 5 SSE: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1944
36.7 C (98.1 F)
50
Coldest night (TNn)
-11.7 C (10.9 F)
1962
-6.1 C (21.0 F)
50
Wettest day (Rx1day)
212.3 mm (8.4 in)
1964
98.8 mm (3.9 in)
50
Wettest five days (Rx5day)
384.0 mm (15.1 in)
1957
144.3 mm (5.7 in)
50
Longest dry spell (CDD)
88 days
1910
23 days
50
Hottest day (TXx)
The hottest day of the year at St Marks 5 SSE, 1907 to 1981. The record is 42.2 C (108.0 F) in 1944, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at St Marks 5 SSE by year
Year
Hottest day (TXx)
1907
28.3 C (82.9 F)
1908
35.6 C (96.1 F)
1909
35.6 C (96.1 F)
1910
34.4 C (93.9 F)
1911
28.9 C (84.0 F)
1912
26.7 C (80.1 F)
1913
31.1 C (88.0 F)
1914
34.4 C (93.9 F)
1915
37.8 C (100.0 F)
1916
27.8 C (82.0 F)
1942
40.0 C (104.0 F)
1943
37.8 C (100.0 F)
1944
42.2 C (108.0 F)
1945
36.7 C (98.1 F)
1946
34.4 C (93.9 F)
1947
37.8 C (100.0 F)
1948
36.1 C (97.0 F)
1949
36.1 C (97.0 F)
1950
40.6 C (105.1 F)
1951
36.1 C (97.0 F)
1952
39.4 C (102.9 F)
1953
38.9 C (102.0 F)
1954
36.7 C (98.1 F)
1955
37.2 C (99.0 F)
1956
38.9 C (102.0 F)
1957
35.6 C (96.1 F)
1958
36.1 C (97.0 F)
1959
38.3 C (100.9 F)
1960
36.7 C (98.1 F)
1961
38.9 C (102.0 F)
1962
37.8 C (100.0 F)
1963
36.7 C (98.1 F)
1964
36.1 C (97.0 F)
1965
36.7 C (98.1 F)
1966
37.2 C (99.0 F)
1967
35.6 C (96.1 F)
1968
37.8 C (100.0 F)
1969
37.2 C (99.0 F)
1970
36.7 C (98.1 F)
1971
35.0 C (95.0 F)
1972
37.8 C (100.0 F)
1973
35.0 C (95.0 F)
1974
36.1 C (97.0 F)
1975
35.6 C (96.1 F)
1976
35.0 C (95.0 F)
1977
38.9 C (102.0 F)
1978
37.8 C (100.0 F)
1979
36.1 C (97.0 F)
1980
40.0 C (104.0 F)
1981
39.4 C (102.9 F)
Coldest night (TNn)
The coldest night of the year at St Marks 5 SSE, 1907 to 1981. The record is -11.7 C (10.9 F) in 1962, marked on the chart; the median year is -6.1 C (21.0 F).
Coldest night (TNn) at St Marks 5 SSE by year
Year
Coldest night (TNn)
1907
6.1 C (43.0 F)
1908
-3.9 C (25.0 F)
1909
-7.8 C (18.0 F)
1910
-4.4 C (24.1 F)
1911
-4.4 C (24.1 F)
1912
-3.3 C (26.1 F)
1913
-3.9 C (25.0 F)
1914
-6.7 C (19.9 F)
1915
-4.4 C (24.1 F)
1916
-3.9 C (25.0 F)
1942
-2.8 C (27.0 F)
1943
-7.8 C (18.0 F)
1944
-5.0 C (23.0 F)
1945
-5.0 C (23.0 F)
1946
-2.2 C (28.0 F)
1947
-5.6 C (21.9 F)
1948
-7.2 C (19.0 F)
1949
-1.7 C (28.9 F)
1950
-6.7 C (19.9 F)
1951
-8.3 C (17.1 F)
1952
-6.7 C (19.9 F)
1953
-4.4 C (24.1 F)
1954
-4.4 C (24.1 F)
1955
-6.7 C (19.9 F)
1956
-3.9 C (25.0 F)
1957
-6.7 C (19.9 F)
1958
-6.7 C (19.9 F)
1959
-7.2 C (19.0 F)
1960
-5.6 C (21.9 F)
1961
-7.8 C (18.0 F)
1962
-11.7 C (10.9 F)
1963
-7.8 C (18.0 F)
1964
-7.2 C (19.0 F)
1965
-2.8 C (27.0 F)
1966
-11.1 C (12.0 F)
1967
-6.1 C (21.0 F)
1968
-5.6 C (21.9 F)
1969
-6.1 C (21.0 F)
1970
-8.3 C (17.1 F)
1971
-6.7 C (19.9 F)
1972
-4.4 C (24.1 F)
1973
-6.7 C (19.9 F)
1974
-6.1 C (21.0 F)
1975
-5.6 C (21.9 F)
1976
-6.1 C (21.0 F)
1977
-10.0 C (14.0 F)
1978
-5.6 C (21.9 F)
1979
-8.3 C (17.1 F)
1980
-7.2 C (19.0 F)
1981
-8.9 C (16.0 F)
Wettest day (Rx1day)
The wettest day of the year at St Marks 5 SSE, 1907 to 1981. The record is 212.3 mm (8.4 in) in 1964, marked on the chart; the median year is 98.8 mm (3.9 in).
Wettest day (Rx1day) at St Marks 5 SSE by year
Year
Wettest day (Rx1day)
1907
114.3 mm (4.5 in)
1908
63.5 mm (2.5 in)
1909
77.5 mm (3.1 in)
1910
93.5 mm (3.7 in)
1911
50.8 mm (2.0 in)
1912
101.6 mm (4.0 in)
1913
55.9 mm (2.2 in)
1914
143.0 mm (5.6 in)
1915
195.8 mm (7.7 in)
1916
23.4 mm (0.9 in)
1942
123.4 mm (4.9 in)
1943
81.3 mm (3.2 in)
1944
78.7 mm (3.1 in)
1945
88.9 mm (3.5 in)
1946
190.5 mm (7.5 in)
1947
76.7 mm (3.0 in)
1948
177.8 mm (7.0 in)
1949
66.5 mm (2.6 in)
1950
83.1 mm (3.3 in)
1951
81.3 mm (3.2 in)
1952
170.4 mm (6.7 in)
1953
152.4 mm (6.0 in)
1954
106.7 mm (4.2 in)
1955
144.8 mm (5.7 in)
1956
83.8 mm (3.3 in)
1957
174.5 mm (6.9 in)
1958
141.0 mm (5.6 in)
1959
96.0 mm (3.8 in)
1960
183.1 mm (7.2 in)
1961
93.2 mm (3.7 in)
1962
116.8 mm (4.6 in)
1963
115.8 mm (4.6 in)
1964
212.3 mm (8.4 in)
1965
129.8 mm (5.1 in)
1966
101.9 mm (4.0 in)
1967
113.0 mm (4.4 in)
1968
134.4 mm (5.3 in)
1969
75.2 mm (3.0 in)
1970
93.5 mm (3.7 in)
1971
81.0 mm (3.2 in)
1972
85.3 mm (3.4 in)
1973
83.1 mm (3.3 in)
1974
171.2 mm (6.7 in)
1975
110.5 mm (4.4 in)
1976
141.7 mm (5.6 in)
1977
75.9 mm (3.0 in)
1978
72.6 mm (2.9 in)
1979
94.7 mm (3.7 in)
1980
152.9 mm (6.0 in)
1981
82.0 mm (3.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at St Marks 5 SSE, 1907 to 1981. The record is 384.0 mm (15.1 in) in 1957, marked on the chart; the median year is 144.3 mm (5.7 in).
Wettest five days (Rx5day) at St Marks 5 SSE by year
Year
Wettest five days (Rx5day)
1907
114.3 mm (4.5 in)
1908
81.0 mm (3.2 in)
1909
119.5 mm (4.7 in)
1910
180.3 mm (7.1 in)
1911
53.6 mm (2.1 in)
1912
101.6 mm (4.0 in)
1913
89.7 mm (3.5 in)
1914
143.8 mm (5.7 in)
1915
235.9 mm (9.3 in)
1916
23.4 mm (0.9 in)
1942
123.7 mm (4.9 in)
1943
148.3 mm (5.8 in)
1944
159.2 mm (6.3 in)
1945
88.9 mm (3.5 in)
1946
263.6 mm (10.4 in)
1947
106.2 mm (4.2 in)
1948
377.4 mm (14.9 in)
1949
121.9 mm (4.8 in)
1950
111.8 mm (4.4 in)
1951
128.3 mm (5.1 in)
1952
230.1 mm (9.1 in)
1953
208.2 mm (8.2 in)
1954
106.7 mm (4.2 in)
1955
144.8 mm (5.7 in)
1956
101.6 mm (4.0 in)
1957
384.0 mm (15.1 in)
1958
185.0 mm (7.3 in)
1959
176.2 mm (6.9 in)
1960
291.8 mm (11.5 in)
1961
93.2 mm (3.7 in)
1962
124.4 mm (4.9 in)
1963
129.6 mm (5.1 in)
1964
282.1 mm (11.1 in)
1965
234.4 mm (9.2 in)
1966
157.5 mm (6.2 in)
1967
185.6 mm (7.3 in)
1968
210.3 mm (8.3 in)
1969
175.0 mm (6.9 in)
1970
135.3 mm (5.3 in)
1971
123.7 mm (4.9 in)
1972
138.6 mm (5.5 in)
1973
218.5 mm (8.6 in)
1974
258.6 mm (10.2 in)
1975
204.8 mm (8.1 in)
1976
275.9 mm (10.9 in)
1977
121.9 mm (4.8 in)
1978
120.4 mm (4.7 in)
1979
156.9 mm (6.2 in)
1980
298.2 mm (11.7 in)
1981
96.0 mm (3.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at St Marks 5 SSE, 1907 to 1981. The record is 88 days in 1910, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at St Marks 5 SSE by year
Year
Longest dry spell (CDD)
1907
10 days
1908
54 days
1909
55 days
1910
88 days
1911
36 days
1912
12 days
1913
28 days
1914
36 days
1915
29 days
1916
15 days
1942
25 days
1943
23 days
1944
26 days
1945
20 days
1946
18 days
1947
17 days
1948
22 days
1949
22 days
1950
37 days
1951
32 days
1952
33 days
1953
17 days
1954
21 days
1955
31 days
1956
30 days
1957
33 days
1958
25 days
1959
20 days
1960
31 days
1961
39 days
1962
27 days
1963
22 days
1964
23 days
1965
41 days
1966
20 days
1967
22 days
1968
16 days
1969
21 days
1970
20 days
1971
29 days
1972
23 days
1973
19 days
1974
22 days
1975
13 days
1976
15 days
1977
24 days
1978
28 days
1979
20 days
1980
18 days
1981
23 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
30 years with a frost
Across 30 years with a frost, the median last spring frost at St Marks 5 SSE falls on 28 February and the median first autumn frost on 16 November, which leaves a median of 263 days between them.
Fitted over all years, the growing season changes by +1.7 days per decade at this station.
Frost dates and growing season at St Marks 5 SSE
Measure
Median, all years
Earliest period
Recent period (1910 to 1979)
Recent against earliest
Fitted trend
Last spring frost
28 February
n/a
28 February
n/a
-1.4 days per decade
First autumn frost
16 November
n/a
16 November
n/a
+0.4 days per decade
Growing days
263 days
n/a
263 days
n/a
+1.7 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
38 years, 1908 to 1980
A day with at least 108.8 mm (4.3 in) of rain is expected about once in 2 years. A day with at least 271.5 mm (10.7 in) of rain is expected about once in 100 years.
Rainfall return levels at St Marks 5 SSE: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
108.8 mm (4.3 in)
5 years
147.9 mm (5.8 in)
10 years
175.4 mm (6.9 in)
25 years
212.3 mm (8.4 in)
50 years
241.3 mm (9.5 in)
Longer than the 38 years of record
100 years
271.5 mm (10.7 in)
Longer than the 38 years of record
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 38 years of values from 1908 to 1980.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 212.3 mm (8.4 in) in 1964; 195.8 mm (7.7 in) in 1915; 190.5 mm (7.5 in) in 1946.
Download the Data
Data for St Marks 5 SSE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for St Marks 5 SSE threshold days by year: CSV or JSON. Field meanings are on the data page.
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Records are computed by this site and are not official.