Chatom Weather Records (USC00011566)

Record envelope, standing records and threshold days for Chatom (USC00011566), Alabama, United States, with 71 years of record.

Key Facts for Chatom

Chatom (USC00011566) is a weather station in Alabama, United States at 31.47 latitude and -88.25 longitude, 87 m (285 ft) above sea level.
The station reports from 1949 to 2019, 71 years of record.
1,464 records set at Chatom still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Chatom set a daily record high maximum temperature of 36.7 C (98.1 F) on 2 October 2019.

About the Station

Location: Alabama, United States, 31.47 latitude, -88.25 longitude.
Elevation: 87 m (285 ft).
Period of record: 1949 to 2019, 71 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 Chatom. 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 Chatom, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.7 C (89.1 F)	-17.2 C (1.0 F)	n/a	n/a
Feb	31.1 C (88.0 F)	-14.4 C (6.1 F)	n/a	n/a
Mar	33.3 C (91.9 F)	-10.0 C (14.0 F)	n/a	n/a
Apr	33.9 C (93.0 F)	-2.8 C (27.0 F)	n/a	n/a
May	40.6 C (105.1 F)	2.2 C (36.0 F)	n/a	n/a
Jun	41.1 C (106.0 F)	5.6 C (42.1 F)	n/a	n/a
Jul	41.7 C (107.1 F)	10.6 C (51.1 F)	n/a	n/a
Aug	41.1 C (106.0 F)	9.4 C (48.9 F)	n/a	n/a
Sep	39.4 C (102.9 F)	2.2 C (36.0 F)	n/a	n/a
Oct	37.8 C (100.0 F)	-6.7 C (19.9 F)	n/a	n/a
Nov	32.2 C (90.0 F)	-10.0 C (14.0 F)	n/a	n/a
Dec	30.6 C (87.1 F)	-15.6 C (3.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chatom still stand. 1996 holds the most, with 61.

Standing records at Chatom by the year they were set
Year set	Standing records
1949	5
1950	33
1951	46
1952	48
1953	29
1954	58
1955	42
1956	31
1957	33
1958	15
1959	16
1960	28
1961	21
1962	30
1963	22
1964	16
1965	10
1966	12
1967	30
1968	8
1969	14
1970	16
1971	28
1972	26
1973	16
1974	17
1975	19
1976	13
1977	19
1978	7
1979	13
1980	19
1981	23
1982	34
1983	23
1984	46
1985	25
1986	17
1987	18
1988	14
1989	20
1990	4
1991	22
1992	40
1993	33
1994	12
1995	19
1996	61
1997	11
1998	25
1999	23
2000	30
2001	17
2002	20
2003	10
2004	11
2005	11
2006	11
2007	14
2008	13
2009	11
2010	17
2011	11
2012	3
2013	14
2014	10
2015	14
2016	7
2017	12
2018	13
2019	5

All-Time Record Progression

6 new records

6 all-time records were set at Chatom between 11 January 1982 and 3 January 2017. Each dot is a new record.

When Chatom set new all-time records
Date	Kind	Detail
1982-01-11	Record low minimum temperature	Record low minimum temperature -16.7 C (1.9 F)
1982-01-12	Record low minimum temperature	Record low minimum temperature -17.2 C (1.0 F)
1986-08-17	Record high minimum temperature	Record high minimum temperature 28.9 C (84.0 F)
1993-03-14	Record low maximum temperature	Record low maximum temperature -3.9 C (25.0 F)
1998-09-29	Record daily precipitation	Record daily precipitation 261.6 mm (10.3 in)
2017-01-03	Record daily precipitation	Record daily precipitation 264.2 mm (10.4 in)

Wettest Day of Each Month

Jan: 264.2 mm (10.4 in)

The wettest day on record for each calendar month at Chatom. The most was 264.2 mm (10.4 in) on 3 January 2017.

Record daily precipitation for each month at Chatom
Month	Record daily precipitation (mm)	Date
Jan	264.2 mm (10.4 in)	3 January 2017
Feb	164.6 mm (6.5 in)	18 February 1961
Mar	121.9 mm (4.8 in)	16 March 1990
Apr	180.3 mm (7.1 in)	15 April 2018
May	123.2 mm (4.9 in)	3 May 2010
Jun	148.6 mm (5.9 in)	8 June 1978
Jul	253.7 mm (10.0 in)	8 July 1956
Aug	135.9 mm (5.4 in)	4 August 1995
Sep	261.6 mm (10.3 in)	29 September 1998
Oct	125.7 mm (4.9 in)	31 October 1993
Nov	119.1 mm (4.7 in)	14 November 1957
Dec	155.7 mm (6.1 in)	10 December 1961

Period of Record Coverage

1949 to 2019

71 years of record at Chatom, 1949 to 2019. 9 years have data for under 90 percent of days and are left out of rankings: 1949, 1987, 1988, 1989, 1990, 2005, 2016, 2018 and others.

Days with data per year at Chatom
Year	Days with data	Share of year	Complete
1949	122	33%	No
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	360	99%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	362	99%	Yes
1963	355	97%	Yes
1964	365	100%	Yes
1965	363	99%	Yes
1966	364	100%	Yes
1967	363	99%	Yes
1968	365	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	355	97%	Yes
1972	366	100%	Yes
1973	334	92%	Yes
1974	364	100%	Yes
1975	361	99%	Yes
1976	350	96%	Yes
1977	363	99%	Yes
1978	356	98%	Yes
1979	363	99%	Yes
1980	332	91%	Yes
1981	354	97%	Yes
1982	342	94%	Yes
1983	329	90%	Yes
1984	338	92%	Yes
1985	337	92%	Yes
1986	348	95%	Yes
1987	276	76%	No
1988	228	62%	No
1989	209	57%	No
1990	111	30%	No
1991	362	99%	Yes
1992	346	95%	Yes
1993	364	100%	Yes
1994	343	94%	Yes
1995	356	98%	Yes
1996	344	94%	Yes
1997	350	96%	Yes
1998	351	96%	Yes
1999	352	96%	Yes
2000	355	97%	Yes
2001	360	99%	Yes
2002	349	96%	Yes
2003	343	94%	Yes
2004	343	94%	Yes
2005	299	82%	No
2006	339	93%	Yes
2007	359	98%	Yes
2008	361	99%	Yes
2009	364	100%	Yes
2010	365	100%	Yes
2011	362	99%	Yes
2012	362	99%	Yes
2013	348	95%	Yes
2014	353	97%	Yes
2015	355	97%	Yes
2016	275	75%	No
2017	333	91%	Yes
2018	302	83%	No
2019	219	60%	No

Latest Records

Latest records at Chatom
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 October 2019	Chatom, US	daily high max	36.7 C (98.1 F)	0.6 C (1.1 F)	64 years	27 of 100 (Routine)
27 September 2019	Chatom, US	daily high min (Tie)	23.3 C (73.9 F)	tie	64 years	6 of 100 (Routine)
25 September 2019	Chatom, US	daily high max (Tie)	36.1 C (97.0 F)	tie	2 years	1 of 100 (Routine)
19 September 2019	Chatom, US	daily high max	37.2 C (99.0 F)	0.5 C (0.9 F)	64 years	27 of 100 (Routine)
18 September 2019	Chatom, US	daily high max (Tie)	37.2 C (99.0 F)	tie	22 years	3 of 100 (Routine)
29 August 2019	Chatom, US	daily rain	22.9 mm (0.9 in)	10.7 mm (0.4 in)	48 years	20 of 100 (Routine)
27 July 2019	Chatom, US	daily low min (Tie)	16.7 C (62.1 F)	tie	34 years	4 of 100 (Routine)
21 July 2019	Chatom, US	daily rain	90.2 mm (3.6 in)	4.1 mm (0.16 in)	44 years	22 of 100 (Routine)
15 July 2019	Chatom, US	daily rain	89.9 mm (3.5 in)	22.6 mm (0.9 in)	13 years	22 of 100 (Routine)
11 May 2019	Chatom, US	daily rain (Tie)	26.7 mm (1.1 in)	tie	40 years	4 of 100 (Routine)
20 April 2019	Chatom, US	daily low max	16.7 C (62.1 F)	1.6 C (2.9 F)	65 years	30 of 100 (Routine)
19 April 2019	Chatom, US	daily rain	64.8 mm (2.6 in)	40.4 mm (1.6 in)	30 years	31 of 100 (Routine)
1 April 2019	Chatom, US	daily low max	11.1 C (52.0 F)	5.0 C (9.0 F)	68 years	40 of 100 (Notable)
15 March 2019	Chatom, US	daily rain	53.1 mm (2.1 in)	17.5 mm (0.7 in)	28 years	23 of 100 (Routine)
7 February 2019	Chatom, US	daily high min	17.8 C (64.0 F)	3.4 C (6.1 F)	68 years	32 of 100 (Routine)
24 January 2019	Chatom, US	daily rain	182.9 mm (7.2 in)	91.5 mm (3.6 in)	8 years	49 of 100 (Notable)
4 January 2019	Chatom, US	daily rain	42.4 mm (1.7 in)	1.8 mm (0.07 in)	9 years	9 of 100 (Routine)
2 January 2019	Chatom, US	daily rain	43.2 mm (1.7 in)	4.6 mm (0.18 in)	20 years	15 of 100 (Routine)
28 December 2018	Chatom, US	daily rain	87.6 mm (3.4 in)	16.0 mm (0.6 in)	35 years	24 of 100 (Routine)
9 December 2018	Chatom, US	daily rain	73.7 mm (2.9 in)	30.5 mm (1.2 in)	13 years	24 of 100 (Routine)

Climate Trend

56 complete years, 1950 to 2018

One stripe for each of 56 complete years at Chatom, 1950 to 2018. Blue stripes are years cooler than the station's own mean of 18.5 C (65.3 F); red stripes are warmer. The coolest year was 1993, at 16.0 C (60.8 F), and the warmest was 1998, at 19.9 C (67.8 F). The strongest colour marks a difference of 2.5 C (4.5 F).

Annual mean temperature at Chatom as warming stripes, 1950 to 2018
Year	Annual mean temperature	Difference from the station mean
1950	18.7 C	+0.20 C
1951	19.3 C	+0.78 C
1952	18.6 C	+0.10 C
1953	19.0 C	+0.46 C
1954	19.2 C	+0.71 C
1955	19.0 C	+0.48 C
1956	18.9 C	+0.38 C
1957	19.3 C	+0.76 C
1958	17.7 C	-0.85 C
1959	18.4 C	-0.12 C
1960	17.8 C	-0.70 C
1961	17.9 C	-0.58 C
1962	18.3 C	-0.18 C
1963	17.8 C	-0.71 C
1964	18.9 C	+0.34 C
1965	19.2 C	+0.68 C
1966	18.6 C	+0.04 C
1967	18.8 C	+0.29 C
1968	18.1 C	-0.41 C
1969	18.4 C	-0.09 C
1970	18.3 C	-0.19 C
1971	18.9 C	+0.34 C
1972	19.0 C	+0.47 C
1974	19.0 C	+0.53 C
1975	18.2 C	-0.29 C
1977	19.0 C	+0.48 C
1978	18.7 C	+0.19 C
1979	18.2 C	-0.31 C
1981	18.9 C	+0.42 C
1982	19.7 C	+1.23 C
1983	17.3 C	-1.26 C
1984	17.6 C	-0.91 C
1985	18.4 C	-0.14 C
1986	19.1 C	+0.58 C
1991	19.0 C	+0.48 C
1993	16.0 C	-2.50 C
1995	18.1 C	-0.39 C
1997	18.2 C	-0.27 C
1998	19.9 C	+1.36 C
1999	19.1 C	+0.60 C
2000	19.2 C	+0.70 C
2001	18.6 C	+0.13 C
2002	19.0 C	+0.51 C
2003	18.6 C	+0.10 C
2004	18.5 C	-0.01 C
2007	18.6 C	+0.04 C
2008	17.7 C	-0.86 C
2009	17.9 C	-0.58 C
2010	17.8 C	-0.71 C
2011	18.2 C	-0.27 C
2012	19.1 C	+0.54 C
2013	17.7 C	-0.77 C
2014	17.4 C	-1.11 C
2015	18.3 C	-0.21 C
2017	18.9 C	+0.36 C
2018	18.5 C	+0.01 C

The fitted trend in annual mean temperature here over 1950 to 2018 is -0.06 C (-0.14 to 0.03) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.10 F (-0.26 to 0.05) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Chatom
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.06 C (-0.14 to 0.03) per decade	-0.10 F (-0.26 to 0.05) per decade	1950 to 2018	56	Not clearly different from zero
Mean daily maximum	-0.12 C (-0.21 to -0.02) per decade	-0.21 F (-0.39 to -0.04) per decade	1950 to 2018	56	Fall
Mean daily minimum	0.0 C (-0.1 to 0.1) per decade	0.0 F (-0.2 to 0.2) per decade	1950 to 2018	56	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

1949 to 2019

Yearly extremes at Chatom: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	1952	37.2 C (99.0 F)	71
Coldest night (TNn)	-17.2 C (1.0 F)	1982	-9.4 C (15.1 F)	71
Wettest day (Rx1day)	264.2 mm (10.4 in)	2017	101.6 mm (4.0 in)	71
Wettest five days (Rx5day)	510.5 mm (20.1 in)	1998	150.4 mm (5.9 in)	71
Longest dry spell (CDD)	42 days	2010	23 days	71

Hottest day (TXx)

The hottest day of the year at Chatom, 1949 to 2019. The record is 41.7 C (107.1 F) in 1952, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Chatom by year
Year	Hottest day (TXx)
1949	35.0 C (95.0 F)
1950	37.8 C (100.0 F)
1951	40.0 C (104.0 F)
1952	41.7 C (107.1 F)
1953	38.9 C (102.0 F)
1954	41.1 C (106.0 F)
1955	37.8 C (100.0 F)
1956	37.2 C (99.0 F)
1957	36.7 C (98.1 F)
1958	36.1 C (97.0 F)
1959	36.7 C (98.1 F)
1960	37.2 C (99.0 F)
1961	35.6 C (96.1 F)
1962	37.8 C (100.0 F)
1963	39.4 C (102.9 F)
1964	40.6 C (105.1 F)
1965	37.2 C (99.0 F)
1966	37.2 C (99.0 F)
1967	37.2 C (99.0 F)
1968	36.7 C (98.1 F)
1969	38.9 C (102.0 F)
1970	37.2 C (99.0 F)
1971	36.1 C (97.0 F)
1972	37.2 C (99.0 F)
1973	36.1 C (97.0 F)
1974	36.1 C (97.0 F)
1975	34.4 C (93.9 F)
1976	36.7 C (98.1 F)
1977	41.1 C (106.0 F)
1978	37.8 C (100.0 F)
1979	36.1 C (97.0 F)
1980	40.0 C (104.0 F)
1981	38.9 C (102.0 F)
1982	36.7 C (98.1 F)
1983	36.7 C (98.1 F)
1984	37.2 C (99.0 F)
1985	39.4 C (102.9 F)
1986	37.2 C (99.0 F)
1987	37.8 C (100.0 F)
1988	37.8 C (100.0 F)
1989	36.1 C (97.0 F)
1990	28.3 C (82.9 F)
1991	37.2 C (99.0 F)
1992	33.9 C (93.0 F)
1993	35.6 C (96.1 F)
1994	35.0 C (95.0 F)
1995	37.2 C (99.0 F)
1996	40.6 C (105.1 F)
1997	36.7 C (98.1 F)
1998	39.4 C (102.9 F)
1999	38.3 C (100.9 F)
2000	41.1 C (106.0 F)
2001	36.1 C (97.0 F)
2002	37.8 C (100.0 F)
2003	35.0 C (95.0 F)
2004	36.1 C (97.0 F)
2005	36.1 C (97.0 F)
2006	38.9 C (102.0 F)
2007	39.4 C (102.9 F)
2008	37.2 C (99.0 F)
2009	37.8 C (100.0 F)
2010	38.9 C (102.0 F)
2011	39.4 C (102.9 F)
2012	37.2 C (99.0 F)
2013	36.7 C (98.1 F)
2014	36.7 C (98.1 F)
2015	36.7 C (98.1 F)
2016	37.8 C (100.0 F)
2017	35.0 C (95.0 F)
2018	36.7 C (98.1 F)
2019	37.2 C (99.0 F)

Coldest night (TNn)

The coldest night of the year at Chatom, 1949 to 2019. The record is -17.2 C (1.0 F) in 1982, marked on the chart; the median year is -9.4 C (15.1 F).

Coldest night (TNn) at Chatom by year
Year	Coldest night (TNn)
1949	-5.6 C (21.9 F)
1950	-7.8 C (18.0 F)
1951	-13.3 C (8.1 F)
1952	-7.8 C (18.0 F)
1953	-8.3 C (17.1 F)
1954	-7.8 C (18.0 F)
1955	-9.4 C (15.1 F)
1956	-8.9 C (16.0 F)
1957	-10.0 C (14.0 F)
1958	-9.4 C (15.1 F)
1959	-9.4 C (15.1 F)
1960	-10.0 C (14.0 F)
1961	-10.6 C (12.9 F)
1962	-15.0 C (5.0 F)
1963	-15.6 C (3.9 F)
1964	-11.1 C (12.0 F)
1965	-10.0 C (14.0 F)
1966	-13.9 C (7.0 F)
1967	-7.2 C (19.0 F)
1968	-7.2 C (19.0 F)
1969	-10.0 C (14.0 F)
1970	-13.3 C (8.1 F)
1971	-11.1 C (12.0 F)
1972	-11.7 C (10.9 F)
1973	-8.3 C (17.1 F)
1974	-6.7 C (19.9 F)
1975	-8.9 C (16.0 F)
1976	-9.4 C (15.1 F)
1977	-15.0 C (5.0 F)
1978	-11.1 C (12.0 F)
1979	-11.7 C (10.9 F)
1980	-9.4 C (15.1 F)
1981	-11.1 C (12.0 F)
1982	-17.2 C (1.0 F)
1983	-15.6 C (3.9 F)
1984	-10.0 C (14.0 F)
1985	-16.1 C (3.0 F)
1986	-12.8 C (9.0 F)
1987	-6.7 C (19.9 F)
1988	-7.8 C (18.0 F)
1989	-8.9 C (16.0 F)
1990	-6.1 C (21.0 F)
1991	-8.3 C (17.1 F)
1992	-5.6 C (21.9 F)
1993	-10.0 C (14.0 F)
1994	-9.4 C (15.1 F)
1995	-7.8 C (18.0 F)
1996	-12.8 C (9.0 F)
1997	-8.9 C (16.0 F)
1998	-5.6 C (21.9 F)
1999	-10.0 C (14.0 F)
2000	-9.4 C (15.1 F)
2001	-8.3 C (17.1 F)
2002	-8.3 C (17.1 F)
2003	-10.6 C (12.9 F)
2004	-5.6 C (21.9 F)
2005	-5.6 C (21.9 F)
2006	-6.1 C (21.0 F)
2007	-6.1 C (21.0 F)
2008	-8.9 C (16.0 F)
2009	-7.2 C (19.0 F)
2010	-10.0 C (14.0 F)
2011	-8.3 C (17.1 F)
2012	-8.9 C (16.0 F)
2013	-7.8 C (18.0 F)
2014	-11.7 C (10.9 F)
2015	-10.0 C (14.0 F)
2016	-7.8 C (18.0 F)
2017	-8.3 C (17.1 F)
2018	-12.2 C (10.0 F)
2019	-5.0 C (23.0 F)

Wettest day (Rx1day)

The wettest day of the year at Chatom, 1949 to 2019. The record is 264.2 mm (10.4 in) in 2017, marked on the chart; the median year is 101.6 mm (4.0 in).

Wettest day (Rx1day) at Chatom by year
Year	Wettest day (Rx1day)
1949	63.2 mm (2.5 in)
1950	61.5 mm (2.4 in)
1951	96.0 mm (3.8 in)
1952	56.1 mm (2.2 in)
1953	96.0 mm (3.8 in)
1954	171.5 mm (6.8 in)
1955	106.7 mm (4.2 in)
1956	253.7 mm (10.0 in)
1957	119.1 mm (4.7 in)
1958	81.8 mm (3.2 in)
1959	144.0 mm (5.7 in)
1960	123.2 mm (4.9 in)
1961	164.6 mm (6.5 in)
1962	89.7 mm (3.5 in)
1963	68.6 mm (2.7 in)
1964	87.9 mm (3.5 in)
1965	101.6 mm (4.0 in)
1966	64.3 mm (2.5 in)
1967	78.7 mm (3.1 in)
1968	90.2 mm (3.6 in)
1969	60.2 mm (2.4 in)
1970	106.7 mm (4.2 in)
1971	63.5 mm (2.5 in)
1972	93.0 mm (3.7 in)
1973	73.7 mm (2.9 in)
1974	104.1 mm (4.1 in)
1975	132.1 mm (5.2 in)
1976	63.5 mm (2.5 in)
1977	75.4 mm (3.0 in)
1978	148.6 mm (5.9 in)
1979	121.9 mm (4.8 in)
1980	111.8 mm (4.4 in)
1981	108.0 mm (4.3 in)
1982	94.0 mm (3.7 in)
1983	147.3 mm (5.8 in)
1984	113.0 mm (4.4 in)
1985	105.2 mm (4.1 in)
1986	94.0 mm (3.7 in)
1987	71.1 mm (2.8 in)
1988	101.6 mm (4.0 in)
1989	99.6 mm (3.9 in)
1990	121.9 mm (4.8 in)
1991	114.3 mm (4.5 in)
1992	81.3 mm (3.2 in)
1993	125.7 mm (4.9 in)
1994	62.2 mm (2.4 in)
1995	135.9 mm (5.4 in)
1996	108.2 mm (4.3 in)
1997	76.7 mm (3.0 in)
1998	261.6 mm (10.3 in)
1999	154.9 mm (6.1 in)
2000	80.0 mm (3.1 in)
2001	106.9 mm (4.2 in)
2002	112.5 mm (4.4 in)
2003	96.5 mm (3.8 in)
2004	96.5 mm (3.8 in)
2005	137.7 mm (5.4 in)
2006	96.5 mm (3.8 in)
2007	109.2 mm (4.3 in)
2008	71.1 mm (2.8 in)
2009	128.3 mm (5.1 in)
2010	123.2 mm (4.9 in)
2011	100.3 mm (3.9 in)
2012	91.4 mm (3.6 in)
2013	79.2 mm (3.1 in)
2014	106.7 mm (4.2 in)
2015	94.0 mm (3.7 in)
2016	81.5 mm (3.2 in)
2017	264.2 mm (10.4 in)
2018	180.3 mm (7.1 in)
2019	182.9 mm (7.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chatom, 1949 to 2019. The record is 510.5 mm (20.1 in) in 1998, marked on the chart; the median year is 150.4 mm (5.9 in).

Wettest five days (Rx5day) at Chatom by year
Year	Wettest five days (Rx5day)
1949	114.0 mm (4.5 in)
1950	123.7 mm (4.9 in)
1951	172.7 mm (6.8 in)
1952	83.4 mm (3.3 in)
1953	236.7 mm (9.3 in)
1954	180.6 mm (7.1 in)
1955	222.0 mm (8.7 in)
1956	281.6 mm (11.1 in)
1957	164.8 mm (6.5 in)
1958	113.6 mm (4.5 in)
1959	224.0 mm (8.8 in)
1960	146.6 mm (5.8 in)
1961	346.4 mm (13.6 in)
1962	89.7 mm (3.5 in)
1963	143.8 mm (5.7 in)
1964	185.9 mm (7.3 in)
1965	121.5 mm (4.8 in)
1966	140.1 mm (5.5 in)
1967	111.8 mm (4.4 in)
1968	122.0 mm (4.8 in)
1969	95.8 mm (3.8 in)
1970	128.3 mm (5.1 in)
1971	130.0 mm (5.1 in)
1972	119.4 mm (4.7 in)
1973	133.4 mm (5.3 in)
1974	153.1 mm (6.0 in)
1975	181.4 mm (7.1 in)
1976	135.4 mm (5.3 in)
1977	112.9 mm (4.4 in)
1978	150.7 mm (5.9 in)
1979	228.3 mm (9.0 in)
1980	250.7 mm (9.9 in)
1981	154.0 mm (6.1 in)
1982	143.8 mm (5.7 in)
1983	174.5 mm (6.9 in)
1984	128.2 mm (5.0 in)
1985	196.8 mm (7.7 in)
1986	227.9 mm (9.0 in)
1987	117.1 mm (4.6 in)
1988	150.4 mm (5.9 in)
1989	121.2 mm (4.8 in)
1990	157.5 mm (6.2 in)
1991	196.5 mm (7.7 in)
1992	177.8 mm (7.0 in)
1993	125.7 mm (4.9 in)
1994	137.2 mm (5.4 in)
1995	184.2 mm (7.3 in)
1996	145.3 mm (5.7 in)
1997	103.6 mm (4.1 in)
1998	510.5 mm (20.1 in)
1999	177.7 mm (7.0 in)
2000	109.0 mm (4.3 in)
2001	162.3 mm (6.4 in)
2002	218.2 mm (8.6 in)
2003	182.9 mm (7.2 in)
2004	128.3 mm (5.1 in)
2005	221.5 mm (8.7 in)
2006	170.0 mm (6.7 in)
2007	128.5 mm (5.1 in)
2008	96.5 mm (3.8 in)
2009	259.8 mm (10.2 in)
2010	138.4 mm (5.4 in)
2011	120.6 mm (4.7 in)
2012	161.2 mm (6.3 in)
2013	119.8 mm (4.7 in)
2014	176.3 mm (6.9 in)
2015	130.5 mm (5.1 in)
2016	96.6 mm (3.8 in)
2017	297.2 mm (11.7 in)
2018	239.8 mm (9.4 in)
2019	182.9 mm (7.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chatom, 1949 to 2019. The record is 42 days in 2010, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Chatom by year
Year	Longest dry spell (CDD)
1949	33 days
1950	17 days
1951	41 days
1952	32 days
1953	24 days
1954	22 days
1955	21 days
1956	21 days
1957	19 days
1958	17 days
1959	15 days
1960	20 days
1961	30 days
1962	19 days
1963	33 days
1964	22 days
1965	26 days
1966	20 days
1967	29 days
1968	24 days
1969	21 days
1970	20 days
1971	36 days
1972	30 days
1973	15 days
1974	17 days
1975	19 days
1976	20 days
1977	19 days
1978	23 days
1979	31 days
1980	18 days
1981	22 days
1982	26 days
1983	20 days
1984	25 days
1985	31 days
1986	19 days
1987	34 days
1988	30 days
1989	29 days
1990	12 days
1991	29 days
1992	15 days
1993	22 days
1994	15 days
1995	20 days
1996	27 days
1997	24 days
1998	34 days
1999	21 days
2000	30 days
2001	39 days
2002	29 days
2003	28 days
2004	24 days
2005	25 days
2006	31 days
2007	32 days
2008	24 days
2009	20 days
2010	42 days
2011	27 days
2012	23 days
2013	22 days
2014	23 days
2015	27 days
2016	30 days
2017	16 days
2018	11 days
2019	9 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

56 years with a frost

Across 56 years with a frost, the median last spring frost at Chatom falls on 27 March and the median first autumn frost on 8 November, which leaves a median of 230 days between them.

Fitted over all years, the growing season changes by +3.3 days per decade at this station.

Frost dates and growing season at Chatom
Measure	Median, all years	Earliest period	Recent period (1978 to 2018)	Recent against earliest	Fitted trend
Last spring frost	27 March	n/a	26 March	n/a	-1.6 days per decade
First autumn frost	8 November	n/a	14 November	n/a	+1.7 days per decade
Growing days	230 days	n/a	235 days	n/a	+3.3 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

58 years, 1950 to 2015

A day with at least 98.4 mm (3.9 in) of rain is expected about once in 2 years. A day with at least 243.5 mm (9.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Chatom: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	98.4 mm (3.9 in)
5 years	130.4 mm (5.1 in)
10 years	154.1 mm (6.1 in)
25 years	187.2 mm (7.4 in)
50 years	214.3 mm (8.4 in)
100 years	243.5 mm (9.6 in)	Longer than the 58 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, 58 years of values from 1950 to 2015.

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: 261.6 mm (10.3 in) in 1998; 253.7 mm (10.0 in) in 1956; 171.5 mm (6.8 in) in 1954.

Station Changes

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

Climate Twins

2001 to 2018 against 1961 to 1990

Over 2001 to 2018, Chatom had a mean temperature of 18.3 C (65.0 F) and 1,569.8 mm (61.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are McComb AP (United States, 213 km away), Hattiesburg 5SW (United States, 106 km away) and Collins (United States, 125 km away).

Climate twins of Chatom: stations whose 1961 to 1990 climate is closest to its 2001 to 2018 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
McComb AP	United States	213 km (132 mi)	18.4 C (65.0 F)	1,591.7 mm (62.7 in)	0.39
Hattiesburg 5SW	United States	106 km (66 mi)	18.6 C (65.5 F)	1,522.6 mm (59.9 in)	0.47
Collins	United States	125 km (78 mi)	18.3 C (64.9 F)	1,511.3 mm (59.5 in)	0.47

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Chatom standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chatom 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 2026-10-17 (17 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).