Jacksonville Cecil Fld NAS Weather Records (USW00093832)

Record envelope, standing records and threshold days for Jacksonville Cecil Fld NAS (USW00093832), Florida, United States, with 52 years of record.

Key Facts for Jacksonville Cecil Fld NAS

Jacksonville Cecil Fld NAS (USW00093832) is a weather station in Florida, United States at 30.22 latitude and -81.88 longitude, 27 m (89 ft) above sea level.
The station reports from 1947 to 1998, 52 years of record.
1,464 records set at Jacksonville Cecil Fld NAS still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Jacksonville Cecil Fld NAS tied a daily record high minimum temperature of 16.1 C (61.0 F) on 22 December 1998.

About the Station

Location: Florida, United States, 30.22 latitude, -81.88 longitude.
Elevation: 27 m (89 ft).
Period of record: 1947 to 1998, 52 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Jacksonville Cecil Fld NAS. 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 Jacksonville Cecil Fld NAS, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.6 C (87.1 F)	-13.3 C (8.1 F)	n/a	n/a
Feb	31.7 C (89.1 F)	-8.3 C (17.1 F)	n/a	n/a
Mar	33.9 C (93.0 F)	-4.4 C (24.1 F)	n/a	n/a
Apr	35.6 C (96.1 F)	0.0 C (32.0 F)	n/a	n/a
May	38.3 C (100.9 F)	7.2 C (45.0 F)	n/a	n/a
Jun	40.0 C (104.0 F)	10.6 C (51.1 F)	n/a	n/a
Jul	39.4 C (102.9 F)	16.1 C (61.0 F)	n/a	n/a
Aug	38.9 C (102.0 F)	15.6 C (60.1 F)	n/a	n/a
Sep	37.8 C (100.0 F)	9.4 C (48.9 F)	n/a	n/a
Oct	37.8 C (100.0 F)	1.7 C (35.1 F)	n/a	n/a
Nov	33.3 C (91.9 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	31.1 C (88.0 F)	-11.1 C (12.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Jacksonville Cecil Fld NAS still stand. 1986 holds the most, with 53.

Standing records at Jacksonville Cecil Fld NAS by the year they were set
Year set	Standing records
1947	23
1953	40
1954	39
1955	15
1956	31
1957	28
1958	27
1959	26
1960	15
1961	29
1962	34
1963	19
1964	26
1965	26
1966	26
1967	48
1968	32
1969	15
1970	36
1971	33
1972	34
1973	24
1974	46
1975	27
1976	22
1977	32
1978	43
1979	23
1980	44
1981	41
1982	24
1983	30
1984	46
1985	51
1986	53
1987	29
1988	36
1989	26
1990	33
1991	23
1992	23
1993	24
1994	15
1995	24
1996	52
1997	33
1998	38

All-Time Record Progression

4 new records

4 all-time records were set at Jacksonville Cecil Fld NAS between 25 December 1983 and 23 December 1989. Each dot is a new record.

When Jacksonville Cecil Fld NAS set new all-time records
Date	Kind	Detail
1983-12-25	Record low maximum temperature	Record low maximum temperature -1.1 C (30.0 F)
1985-01-21	Record low minimum temperature	Record low minimum temperature -13.3 C (8.1 F)
1985-06-04	Record high maximum temperature	Record high maximum temperature 40.0 C (104.0 F)
1989-12-23	Record low maximum temperature	Record low maximum temperature -1.7 C (28.9 F)

Wettest Day of Each Month

Jun: 198.1 mm (7.8 in)

The wettest day on record for each calendar month at Jacksonville Cecil Fld NAS. The most was 198.1 mm (7.8 in) on 6 June 1968.

Record daily precipitation for each month at Jacksonville Cecil Fld NAS
Month	Record daily precipitation (mm)	Date
Jan	68.1 mm (2.7 in)	19 January 1978
Feb	115.8 mm (4.6 in)	3 February 1970
Mar	121.2 mm (4.8 in)	28 March 1970
Apr	102.1 mm (4.0 in)	27 April 1997
May	150.6 mm (5.9 in)	2 May 1964
Jun	198.1 mm (7.8 in)	6 June 1968
Jul	109.7 mm (4.3 in)	17 July 1995
Aug	126.7 mm (5.0 in)	28 August 1968
Sep	148.8 mm (5.9 in)	10 September 1964
Oct	159.8 mm (6.3 in)	3 October 1992
Nov	82.6 mm (3.3 in)	4 November 1987
Dec	69.1 mm (2.7 in)	6 December 1979

Period of Record Coverage

1947 to 1998

47 years of record at Jacksonville Cecil Fld NAS, 1947 to 1998. 1 years have data for under 90 percent of days and are left out of rankings: 1947.

Days with data per year at Jacksonville Cecil Fld NAS
Year	Days with data	Share of year	Complete
1947	208	57%	No
1953	357	98%	Yes
1954	364	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	364	100%	Yes
1959	365	100%	Yes
1960	365	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	364	99%	Yes
1981	362	99%	Yes
1982	359	98%	Yes
1983	364	100%	Yes
1984	366	100%	Yes
1985	364	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	363	99%	Yes
1990	365	100%	Yes
1991	364	100%	Yes
1992	365	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	361	99%	Yes

Latest Records

Latest records at Jacksonville Cecil Fld NAS
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
22 December 1998	Jacksonville Cecil Fld NAS, US	daily high min (Tie)	16.1 C (61.0 F)	tie	41 years	4 of 100 (Routine)
7 November 1998	Jacksonville Cecil Fld NAS, US	daily low min (Tie)	3.3 C (37.9 F)	tie	31 years	3 of 100 (Routine)
31 October 1998	Jacksonville Cecil Fld NAS, US	daily high max	30.6 C (87.1 F)	0.6 C (1.1 F)	36 years	17 of 100 (Routine)
29 September 1998	Jacksonville Cecil Fld NAS, US	daily high min	23.9 C (75.0 F)	0.6 C (1.1 F)	24 years	14 of 100 (Routine)
27 September 1998	Jacksonville Cecil Fld NAS, US	daily high min	23.9 C (75.0 F)	0.6 C (1.1 F)	37 years	18 of 100 (Routine)
26 September 1998	Jacksonville Cecil Fld NAS, US	daily high min	25.0 C (77.0 F)	1.1 C (2.0 F)	44 years	23 of 100 (Routine)
24 September 1998	Jacksonville Cecil Fld NAS, US	daily high min (Tie)	23.9 C (75.0 F)	tie	20 years	2 of 100 (Routine)
20 September 1998	Jacksonville Cecil Fld NAS, US	daily rain	20.8 mm (0.8 in)	2.8 mm (0.11 in)	4 years	7 of 100 (Routine)
20 September 1998	Jacksonville Cecil Fld NAS, US	daily high min (Tie)	23.3 C (73.9 F)	tie	23 years	2 of 100 (Routine)
19 September 1998	Jacksonville Cecil Fld NAS, US	daily high min	23.9 C (75.0 F)	0.6 C (1.1 F)	28 years	15 of 100 (Routine)
13 September 1998	Jacksonville Cecil Fld NAS, US	daily low min	15.6 C (60.1 F)	2.2 C (4.0 F)	41 years	27 of 100 (Routine)
12 September 1998	Jacksonville Cecil Fld NAS, US	daily low min	16.7 C (62.1 F)	1.1 C (2.0 F)	44 years	23 of 100 (Routine)
11 September 1998	Jacksonville Cecil Fld NAS, US	daily low min (Tie)	17.8 C (64.0 F)	tie	41 years	4 of 100 (Routine)
4 September 1998	Jacksonville Cecil Fld NAS, US	daily low min	17.8 C (64.0 F)	0.5 C (0.9 F)	3 years	7 of 100 (Routine)
2 September 1998	Jacksonville Cecil Fld NAS, US	daily low max	25.6 C (78.1 F)	0.5 C (0.9 F)	31 years	15 of 100 (Routine)
27 August 1998	Jacksonville Cecil Fld NAS, US	daily high max (Tie)	36.1 C (97.0 F)	tie	44 years	4 of 100 (Routine)
9 August 1998	Jacksonville Cecil Fld NAS, US	daily rain	32.3 mm (1.3 in)	5.1 mm (0.20 in)	27 years	16 of 100 (Routine)
6 August 1998	Jacksonville Cecil Fld NAS, US	daily low min	18.9 C (66.0 F)	0.5 C (0.9 F)	24 years	15 of 100 (Routine)
5 August 1998	Jacksonville Cecil Fld NAS, US	daily low min	16.1 C (61.0 F)	3.9 C (7.0 F)	24 years	40 of 100 (Notable)
2 August 1998	Jacksonville Cecil Fld NAS, US	daily low max	27.8 C (82.0 F)	1.6 C (2.9 F)	3 years	11 of 100 (Routine)

Climate Trend

46 complete years, 1953 to 1998

One stripe for each of 46 complete years at Jacksonville Cecil Fld NAS, 1953 to 1998. Blue stripes are years cooler than the station's own mean of 20.7 C (69.2 F); red stripes are warmer. The coolest year was 1996, at 19.4 C (66.8 F), and the warmest was 1990, at 22.4 C (72.3 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Jacksonville Cecil Fld NAS as warming stripes, 1953 to 1998
Year	Annual mean temperature	Difference from the station mean
1953	21.0 C	+0.35 C
1954	20.6 C	-0.06 C
1955	20.7 C	-0.02 C
1956	20.7 C	+0.00 C
1957	21.2 C	+0.51 C
1958	19.9 C	-0.80 C
1959	20.7 C	+0.06 C
1960	20.2 C	-0.51 C
1961	20.9 C	+0.20 C
1962	20.3 C	-0.41 C
1963	20.0 C	-0.67 C
1964	20.3 C	-0.33 C
1965	20.3 C	-0.33 C
1966	19.9 C	-0.80 C
1967	20.6 C	-0.05 C
1968	19.8 C	-0.88 C
1969	19.8 C	-0.87 C
1970	20.3 C	-0.37 C
1971	21.0 C	+0.29 C
1972	21.2 C	+0.53 C
1973	20.7 C	+0.03 C
1974	20.7 C	+0.03 C
1975	21.2 C	+0.57 C
1976	20.0 C	-0.65 C
1977	20.2 C	-0.46 C
1978	20.8 C	+0.11 C
1979	20.4 C	-0.23 C
1980	20.8 C	+0.13 C
1981	20.4 C	-0.30 C
1982	21.6 C	+0.90 C
1983	20.0 C	-0.63 C
1984	21.3 C	+0.61 C
1985	21.7 C	+0.99 C
1986	21.9 C	+1.20 C
1987	20.9 C	+0.22 C
1988	20.2 C	-0.47 C
1989	21.2 C	+0.49 C
1990	22.4 C	+1.70 C
1991	21.5 C	+0.82 C
1992	21.1 C	+0.39 C
1993	20.8 C	+0.11 C
1994	21.3 C	+0.60 C
1995	20.1 C	-0.54 C
1996	19.4 C	-1.32 C
1997	19.9 C	-0.76 C
1998	21.1 C	+0.42 C

The fitted trend in annual mean temperature here over 1953 to 1998 is 0.10 C (-0.03 to 0.24) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Jacksonville Cecil Fld NAS
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.10 C (-0.03 to 0.24) per decade	0.2 F (-0.1 to 0.4) per decade	1953 to 1998	46	Not clearly different from zero
Mean daily maximum	0.3 C (0.2 to 0.5) per decade	0.6 F (0.3 to 0.8) per decade	1953 to 1998	46	Rise
Mean daily minimum	-0.1 C (-0.3 to 0.1) per decade	-0.2 F (-0.5 to 0.1) per decade	1953 to 1998	46	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

1947 to 1998

Yearly extremes at Jacksonville Cecil Fld NAS: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1985	37.8 C (100.0 F)	47
Coldest night (TNn)	-13.3 C (8.1 F)	1985	-4.4 C (24.1 F)	47
Wettest day (Rx1day)	198.1 mm (7.8 in)	1968	85.3 mm (3.4 in)	47
Wettest five days (Rx5day)	309.1 mm (12.2 in)	1968	145.6 mm (5.7 in)	47
Longest dry spell (CDD)	38 days	1955	20 days	47

Hottest day (TXx)

The hottest day of the year at Jacksonville Cecil Fld NAS, 1947 to 1998. The record is 40.0 C (104.0 F) in 1985, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Jacksonville Cecil Fld NAS by year
Year	Hottest day (TXx)
1947	36.7 C (98.1 F)
1953	38.3 C (100.9 F)
1954	37.8 C (100.0 F)
1955	37.2 C (99.0 F)
1956	37.8 C (100.0 F)
1957	36.1 C (97.0 F)
1958	35.0 C (95.0 F)
1959	35.6 C (96.1 F)
1960	35.6 C (96.1 F)
1961	37.8 C (100.0 F)
1962	37.8 C (100.0 F)
1963	37.8 C (100.0 F)
1964	37.8 C (100.0 F)
1965	35.0 C (95.0 F)
1966	37.8 C (100.0 F)
1967	38.3 C (100.9 F)
1968	37.8 C (100.0 F)
1969	36.7 C (98.1 F)
1970	38.9 C (102.0 F)
1971	37.2 C (99.0 F)
1972	38.3 C (100.9 F)
1973	38.3 C (100.9 F)
1974	35.0 C (95.0 F)
1975	36.7 C (98.1 F)
1976	37.2 C (99.0 F)
1977	38.9 C (102.0 F)
1978	38.9 C (102.0 F)
1979	37.8 C (100.0 F)
1980	38.3 C (100.9 F)
1981	38.9 C (102.0 F)
1982	36.7 C (98.1 F)
1983	38.3 C (100.9 F)
1984	37.8 C (100.0 F)
1985	40.0 C (104.0 F)
1986	38.9 C (102.0 F)
1987	38.3 C (100.9 F)
1988	38.9 C (102.0 F)
1989	37.8 C (100.0 F)
1990	39.4 C (102.9 F)
1991	36.1 C (97.0 F)
1992	37.2 C (99.0 F)
1993	38.3 C (100.9 F)
1994	36.7 C (98.1 F)
1995	36.1 C (97.0 F)
1996	36.7 C (98.1 F)
1997	36.1 C (97.0 F)
1998	39.4 C (102.9 F)

Coldest night (TNn)

The coldest night of the year at Jacksonville Cecil Fld NAS, 1947 to 1998. The record is -13.3 C (8.1 F) in 1985, marked on the chart; the median year is -4.4 C (24.1 F).

Coldest night (TNn) at Jacksonville Cecil Fld NAS by year
Year	Coldest night (TNn)
1947	-2.2 C (28.0 F)
1953	-2.8 C (27.0 F)
1954	-2.8 C (27.0 F)
1955	-3.9 C (25.0 F)
1956	-2.2 C (28.0 F)
1957	-6.1 C (21.0 F)
1958	-5.0 C (23.0 F)
1959	-4.4 C (24.1 F)
1960	-3.9 C (25.0 F)
1961	-5.0 C (23.0 F)
1962	-11.1 C (12.0 F)
1963	-4.4 C (24.1 F)
1964	-5.6 C (21.9 F)
1965	-2.8 C (27.0 F)
1966	-6.1 C (21.0 F)
1967	-5.6 C (21.9 F)
1968	-4.4 C (24.1 F)
1969	-1.7 C (28.9 F)
1970	-6.1 C (21.0 F)
1971	-7.2 C (19.0 F)
1972	-2.2 C (28.0 F)
1973	-4.4 C (24.1 F)
1974	-3.9 C (25.0 F)
1975	-3.9 C (25.0 F)
1976	-3.3 C (26.1 F)
1977	-6.1 C (21.0 F)
1978	-4.4 C (24.1 F)
1979	-6.1 C (21.0 F)
1980	-4.4 C (24.1 F)
1981	-9.4 C (15.1 F)
1982	-8.3 C (17.1 F)
1983	-11.1 C (12.0 F)
1984	-2.2 C (28.0 F)
1985	-13.3 C (8.1 F)
1986	-7.2 C (19.0 F)
1987	-2.2 C (28.0 F)
1988	-5.0 C (23.0 F)
1989	-8.9 C (16.0 F)
1990	-1.7 C (28.9 F)
1991	-2.2 C (28.0 F)
1992	-4.4 C (24.1 F)
1993	-2.2 C (28.0 F)
1994	-2.8 C (27.0 F)
1995	-5.6 C (21.9 F)
1996	-8.3 C (17.1 F)
1997	-7.2 C (19.0 F)
1998	-3.9 C (25.0 F)

Wettest day (Rx1day)

The wettest day of the year at Jacksonville Cecil Fld NAS, 1947 to 1998. The record is 198.1 mm (7.8 in) in 1968, marked on the chart; the median year is 85.3 mm (3.4 in).

Wettest day (Rx1day) at Jacksonville Cecil Fld NAS by year
Year	Wettest day (Rx1day)
1947	85.3 mm (3.4 in)
1953	57.2 mm (2.3 in)
1954	42.9 mm (1.7 in)
1955	72.9 mm (2.9 in)
1956	146.1 mm (5.8 in)
1957	75.2 mm (3.0 in)
1958	59.4 mm (2.3 in)
1959	96.0 mm (3.8 in)
1960	88.9 mm (3.5 in)
1961	97.3 mm (3.8 in)
1962	76.7 mm (3.0 in)
1963	99.1 mm (3.9 in)
1964	150.6 mm (5.9 in)
1965	74.9 mm (2.9 in)
1966	83.3 mm (3.3 in)
1967	59.2 mm (2.3 in)
1968	198.1 mm (7.8 in)
1969	86.4 mm (3.4 in)
1970	121.2 mm (4.8 in)
1971	60.5 mm (2.4 in)
1972	84.6 mm (3.3 in)
1973	53.6 mm (2.1 in)
1974	98.3 mm (3.9 in)
1975	101.6 mm (4.0 in)
1976	100.1 mm (3.9 in)
1977	76.2 mm (3.0 in)
1978	82.3 mm (3.2 in)
1979	69.1 mm (2.7 in)
1980	102.9 mm (4.1 in)
1981	89.7 mm (3.5 in)
1982	82.3 mm (3.2 in)
1983	73.4 mm (2.9 in)
1984	112.5 mm (4.4 in)
1985	110.2 mm (4.3 in)
1986	79.8 mm (3.1 in)
1987	82.6 mm (3.3 in)
1988	89.7 mm (3.5 in)
1989	73.9 mm (2.9 in)
1990	51.3 mm (2.0 in)
1991	73.4 mm (2.9 in)
1992	159.8 mm (6.3 in)
1993	87.9 mm (3.5 in)
1994	135.1 mm (5.3 in)
1995	121.9 mm (4.8 in)
1996	78.7 mm (3.1 in)
1997	102.1 mm (4.0 in)
1998	104.6 mm (4.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Jacksonville Cecil Fld NAS, 1947 to 1998. The record is 309.1 mm (12.2 in) in 1968, marked on the chart; the median year is 145.6 mm (5.7 in).

Wettest five days (Rx5day) at Jacksonville Cecil Fld NAS by year
Year	Wettest five days (Rx5day)
1947	152.4 mm (6.0 in)
1953	104.2 mm (4.1 in)
1954	88.1 mm (3.5 in)
1955	103.3 mm (4.1 in)
1956	212.9 mm (8.4 in)
1957	146.8 mm (5.8 in)
1958	90.0 mm (3.5 in)
1959	178.3 mm (7.0 in)
1960	145.6 mm (5.7 in)
1961	176.3 mm (6.9 in)
1962	108.0 mm (4.3 in)
1963	225.4 mm (8.9 in)
1964	299.8 mm (11.8 in)
1965	124.2 mm (4.9 in)
1966	114.1 mm (4.5 in)
1967	115.0 mm (4.5 in)
1968	309.1 mm (12.2 in)
1969	119.3 mm (4.7 in)
1970	162.0 mm (6.4 in)
1971	94.5 mm (3.7 in)
1972	136.6 mm (5.4 in)
1973	113.8 mm (4.5 in)
1974	120.7 mm (4.8 in)
1975	118.8 mm (4.7 in)
1976	155.2 mm (6.1 in)
1977	194.6 mm (7.7 in)
1978	129.1 mm (5.1 in)
1979	98.3 mm (3.9 in)
1980	153.0 mm (6.0 in)
1981	163.2 mm (6.4 in)
1982	114.6 mm (4.5 in)
1983	113.8 mm (4.5 in)
1984	122.7 mm (4.8 in)
1985	236.1 mm (9.3 in)
1986	170.5 mm (6.7 in)
1987	125.9 mm (5.0 in)
1988	163.1 mm (6.4 in)
1989	163.3 mm (6.4 in)
1990	75.5 mm (3.0 in)
1991	179.4 mm (7.1 in)
1992	168.7 mm (6.6 in)
1993	116.1 mm (4.6 in)
1994	139.9 mm (5.5 in)
1995	169.4 mm (6.7 in)
1996	165.1 mm (6.5 in)
1997	222.0 mm (8.7 in)
1998	181.1 mm (7.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Jacksonville Cecil Fld NAS, 1947 to 1998. The record is 38 days in 1955, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Jacksonville Cecil Fld NAS by year
Year	Longest dry spell (CDD)
1947	12 days
1953	18 days
1954	17 days
1955	38 days
1956	31 days
1957	20 days
1958	14 days
1959	16 days
1960	17 days
1961	21 days
1962	15 days
1963	17 days
1964	20 days
1965	15 days
1966	25 days
1967	30 days
1968	28 days
1969	23 days
1970	26 days
1971	25 days
1972	22 days
1973	30 days
1974	27 days
1975	15 days
1976	17 days
1977	18 days
1978	38 days
1979	19 days
1980	18 days
1981	22 days
1982	15 days
1983	15 days
1984	21 days
1985	17 days
1986	27 days
1987	32 days
1988	30 days
1989	21 days
1990	18 days
1991	15 days
1992	32 days
1993	16 days
1994	22 days
1995	17 days
1996	31 days
1997	18 days
1998	31 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

41 years with a frost

Across 41 years with a frost, the median last spring frost at Jacksonville Cecil Fld NAS falls on 22 February and the median first autumn frost on 30 November, which leaves a median of 278 days between them.

Fitted over all years, the growing season changes by -3.4 days per decade at this station.

Frost dates and growing season at Jacksonville Cecil Fld NAS
Measure	Median, all years	Earliest period	Recent period (1965 to 1998)	Recent against earliest	Fitted trend
Last spring frost	22 February	n/a	23 February	n/a	+3.7 days per decade
First autumn frost	30 November	n/a	29 November	n/a	+0.3 days per decade
Growing days	278 days	n/a	278 days	n/a	-3.4 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

46 years, 1953 to 1998

A day with at least 85.7 mm (3.4 in) of rain is expected about once in 2 years. A day with at least 195.1 mm (7.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Jacksonville Cecil Fld NAS: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	85.7 mm (3.4 in)
5 years	111.8 mm (4.4 in)
10 years	130.2 mm (5.1 in)
25 years	155.1 mm (6.1 in)
50 years	174.7 mm (6.9 in)	Longer than the 46 years of record
100 years	195.1 mm (7.7 in)	Longer than the 46 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, 46 years of values from 1953 to 1998.

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: 198.1 mm (7.8 in) in 1968; 159.8 mm (6.3 in) in 1992; 150.6 mm (5.9 in) in 1964.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Jacksonville Cecil Fld NAS standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Jacksonville Cecil Fld NAS 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.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).