Record envelope, standing records and threshold days for Heflin (USC00013775), Alabama, United States, with 70 years of record.
Key Facts for Heflin
Heflin (USC00013775) is a weather station in Alabama, United States at 33.64 latitude and -85.61 longitude, 308 m (1,010 ft) above sea level.
The station reports from 1956 to 2025, 70 years of record.
1,464 records set at Heflin still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Heflin set a daily record high minimum temperature of 13.3 C (55.9 F) on 22 November 2025.
About the Station
Location: Alabama, United States, 33.64 latitude, -85.61 longitude.
Elevation: 308 m (1,010 ft).
Period of record: 1956 to 2025, 70 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
2 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 Heflin. The lines show the 2026 daily maximum and minimum. 2 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Heflin, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
26.1 C (79.0 F)
-20.0 C (-4.0 F)
21.1 C (70.0 F)
-13.3 C (8.1 F)
Feb
28.3 C (82.9 F)
-17.2 C (1.0 F)
25.6 C (78.1 F)
-8.9 C (16.0 F)
Mar
30.6 C (87.1 F)
-13.3 C (8.1 F)
26.1 C (79.0 F)
-2.8 C (27.0 F)
Apr
32.2 C (90.0 F)
-5.6 C (21.9 F)
30.0 C (86.0 F)
0.6 C (33.1 F)
May
36.7 C (98.1 F)
-1.1 C (30.0 F)
30.6 C (87.1 F)
6.7 C (44.1 F)
Jun
41.1 C (106.0 F)
3.3 C (37.9 F)
33.9 C (93.0 F)
12.8 C (55.0 F)
Jul
41.7 C (107.1 F)
8.3 C (46.9 F)
34.4 C (93.9 F)
17.8 C (64.0 F)
Aug
40.6 C (105.1 F)
9.4 C (48.9 F)
33.3 C (91.9 F)
10.6 C (51.1 F)
Sep
37.8 C (100.0 F)
-1.7 C (28.9 F)
32.8 C (91.0 F)
12.2 C (54.0 F)
Oct
35.6 C (96.1 F)
-6.1 C (21.0 F)
28.9 C (84.0 F)
3.3 C (37.9 F)
Nov
30.6 C (87.1 F)
-12.2 C (10.0 F)
26.7 C (80.1 F)
-5.0 C (23.0 F)
Dec
25.6 C (78.1 F)
-23.3 C (-9.9 F)
21.1 C (70.0 F)
-10.0 C (14.0 F)
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Heflin still stand. 2010 holds the most, with 49.
Standing records at Heflin by the year they were set
Year set
Standing records
1956
35
1957
33
1958
22
1959
20
1960
36
1961
15
1962
42
1963
36
1964
24
1965
28
1966
30
1967
28
1968
31
1969
22
1970
29
1971
28
1972
18
1973
18
1974
31
1975
21
1976
26
1977
32
1978
27
1979
32
1980
29
1981
16
1982
13
1983
23
1984
13
1986
13
1987
16
1988
14
1989
17
1990
30
1991
24
1992
18
1993
14
1994
14
1995
16
1996
14
1997
19
1998
25
1999
17
2000
20
2001
13
2002
21
2003
13
2004
21
2005
16
2006
9
2007
22
2008
9
2009
10
2010
49
2011
39
2012
9
2013
14
2014
19
2015
22
2016
5
2017
13
2018
19
2019
16
2020
30
2021
8
2022
14
2023
13
2024
13
2025
18
All-Time Record Progression
4 new records
4 all-time records were set at Heflin between 17 August 2010 and 3 July 2011. Each dot is a new record.
When Heflin set new all-time records
Date
Kind
Detail
2010-08-17
Record high minimum temperature
Record high minimum temperature 25.6 C (78.1 F)
2011-06-20
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
2011-07-02
Record high minimum temperature
Record high minimum temperature 27.2 C (81.0 F)
2011-07-03
Record high minimum temperature
Record high minimum temperature 28.3 C (82.9 F)
Wettest Day of Each Month
Aug: 165.1 mm (6.5 in)
The wettest day on record for each calendar month at Heflin. The most was 165.1 mm (6.5 in) on 24 August 1967.
Record daily precipitation for each month at Heflin
Month
Record daily precipitation (mm)
Date
Jan
102.9 mm (4.1 in)
25 January 2010
Feb
137.2 mm (5.4 in)
2 February 1982
Mar
146.1 mm (5.8 in)
20 March 1970
Apr
153.7 mm (6.1 in)
13 April 1979
May
163.3 mm (6.4 in)
15 May 1968
Jun
125.5 mm (4.9 in)
9 June 1992
Jul
119.4 mm (4.7 in)
4 July 1976
Aug
165.1 mm (6.5 in)
24 August 1967
Sep
97.5 mm (3.8 in)
17 September 2004
Oct
134.6 mm (5.3 in)
5 October 1995
Nov
124.0 mm (4.9 in)
17 November 2014
Dec
109.2 mm (4.3 in)
3 December 1983
Period of Record Coverage
1956 to 2025
Complete yearUnder 90 percent of days
69 years of record at Heflin, 1956 to 2025. 10 years have data for under 90 percent of days and are left out of rankings: 1959, 1961, 1980, 1981, 1984, 1986, 2011, 2012 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 55 complete years at Heflin, 1956 to 2025. Blue stripes are years cooler than the station's own mean of 15.6 C (60.1 F); red stripes are warmer. The coolest year was 1976, at 13.8 C (56.8 F), and the warmest was 2019, at 17.0 C (62.6 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Heflin as warming stripes, 1956 to 2025
Year
Annual mean temperature
Difference from the station mean
1956
16.2 C
+0.64 C
1957
16.5 C
+0.91 C
1958
14.7 C
-0.88 C
1960
15.0 C
-0.61 C
1964
15.2 C
-0.43 C
1965
15.4 C
-0.20 C
1966
14.5 C
-1.13 C
1967
14.5 C
-1.13 C
1968
14.2 C
-1.37 C
1969
14.4 C
-1.20 C
1970
15.1 C
-0.48 C
1971
15.1 C
-0.46 C
1972
15.0 C
-0.63 C
1973
15.3 C
-0.28 C
1975
15.2 C
-0.43 C
1976
13.8 C
-1.84 C
1978
15.0 C
-0.55 C
1979
14.9 C
-0.73 C
1987
15.7 C
+0.10 C
1988
15.1 C
-0.53 C
1989
15.3 C
-0.27 C
1990
16.8 C
+1.22 C
1991
16.4 C
+0.81 C
1992
15.2 C
-0.37 C
1993
15.4 C
-0.15 C
1994
15.7 C
+0.08 C
1995
15.6 C
+0.01 C
1996
14.9 C
-0.69 C
1997
15.2 C
-0.38 C
1998
16.5 C
+0.92 C
1999
16.0 C
+0.40 C
2000
15.6 C
0.00 C
2001
15.4 C
-0.18 C
2002
15.8 C
+0.17 C
2003
15.5 C
-0.12 C
2004
15.8 C
+0.22 C
2005
15.7 C
+0.13 C
2006
16.0 C
+0.37 C
2007
16.1 C
+0.52 C
2008
15.4 C
-0.22 C
2009
15.4 C
-0.16 C
2010
16.2 C
+0.59 C
2012
16.4 C
+0.84 C
2013
15.1 C
-0.52 C
2014
14.8 C
-0.80 C
2015
16.5 C
+0.87 C
2016
16.2 C
+0.61 C
2018
16.5 C
+0.88 C
2019
17.0 C
+1.39 C
2020
16.6 C
+0.99 C
2021
16.1 C
+0.55 C
2022
16.1 C
+0.53 C
2023
16.9 C
+1.27 C
2024
16.8 C
+1.24 C
2025
16.1 C
+0.52 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1956 to 2025. In Fahrenheit: 0.4 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Heflin
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.5) per decade
1956 to 2025
55
Rise
Mean daily maximum
-0.01 C (-0.11 to 0.08) per decade
-0.03 F (-0.19 to 0.14) per decade
1956 to 2025
55
Not clearly different from zero
Mean daily minimum
0.4 C (0.3 to 0.5) per decade
0.8 F (0.6 to 1.0) per decade
1956 to 2025
55
Rise
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
1956 to 2025
Yearly extremes at Heflin: 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)
1980
36.1 C (97.0 F)
69
Coldest night (TNn)
-23.3 C (-9.9 F)
1983
-12.8 C (9.0 F)
69
Wettest day (Rx1day)
165.1 mm (6.5 in)
1967
88.9 mm (3.5 in)
69
Wettest five days (Rx5day)
309.7 mm (12.2 in)
1961
131.5 mm (5.2 in)
69
Longest dry spell (CDD)
87 days
2016
20 days
69
Hottest day (TXx)
The hottest day of the year at Heflin, 1956 to 2025. The record is 41.7 C (107.1 F) in 1980, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Heflin by year
Year
Hottest day (TXx)
1956
37.2 C (99.0 F)
1957
37.2 C (99.0 F)
1958
36.7 C (98.1 F)
1959
36.7 C (98.1 F)
1960
37.8 C (100.0 F)
1961
36.1 C (97.0 F)
1962
37.2 C (99.0 F)
1963
35.0 C (95.0 F)
1964
37.8 C (100.0 F)
1965
35.0 C (95.0 F)
1966
40.0 C (104.0 F)
1967
35.0 C (95.0 F)
1968
38.3 C (100.9 F)
1969
39.4 C (102.9 F)
1970
37.2 C (99.0 F)
1971
36.1 C (97.0 F)
1972
36.7 C (98.1 F)
1973
36.1 C (97.0 F)
1974
35.6 C (96.1 F)
1975
36.1 C (97.0 F)
1976
36.1 C (97.0 F)
1977
38.9 C (102.0 F)
1978
36.7 C (98.1 F)
1979
36.1 C (97.0 F)
1980
41.7 C (107.1 F)
1981
37.2 C (99.0 F)
1982
35.0 C (95.0 F)
1983
40.6 C (105.1 F)
1984
36.7 C (98.1 F)
1986
37.2 C (99.0 F)
1987
35.6 C (96.1 F)
1988
36.7 C (98.1 F)
1989
33.9 C (93.0 F)
1990
36.7 C (98.1 F)
1991
37.2 C (99.0 F)
1992
34.4 C (93.9 F)
1993
36.7 C (98.1 F)
1994
32.8 C (91.0 F)
1995
36.7 C (98.1 F)
1996
35.0 C (95.0 F)
1997
33.9 C (93.0 F)
1998
35.6 C (96.1 F)
1999
37.2 C (99.0 F)
2000
37.2 C (99.0 F)
2001
32.8 C (91.0 F)
2002
34.4 C (93.9 F)
2003
32.8 C (91.0 F)
2004
33.9 C (93.0 F)
2005
33.9 C (93.0 F)
2006
35.6 C (96.1 F)
2007
37.8 C (100.0 F)
2008
35.6 C (96.1 F)
2009
33.3 C (91.9 F)
2010
37.2 C (99.0 F)
2011
41.1 C (106.0 F)
2012
38.9 C (102.0 F)
2013
32.2 C (90.0 F)
2014
34.4 C (93.9 F)
2015
35.0 C (95.0 F)
2016
35.0 C (95.0 F)
2017
32.8 C (91.0 F)
2018
35.6 C (96.1 F)
2019
37.2 C (99.0 F)
2020
34.4 C (93.9 F)
2021
32.8 C (91.0 F)
2022
34.4 C (93.9 F)
2023
35.0 C (95.0 F)
2024
36.7 C (98.1 F)
2025
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Heflin, 1956 to 2025. The record is -23.3 C (-9.9 F) in 1983, marked on the chart; the median year is -12.8 C (9.0 F).
Coldest night (TNn) at Heflin by year
Year
Coldest night (TNn)
1956
-9.4 C (15.1 F)
1957
-13.9 C (7.0 F)
1958
-16.7 C (1.9 F)
1959
-16.1 C (3.0 F)
1960
-13.9 C (7.0 F)
1961
-15.0 C (5.0 F)
1962
-17.2 C (1.0 F)
1963
-15.6 C (3.9 F)
1964
-15.6 C (3.9 F)
1965
-13.9 C (7.0 F)
1966
-20.0 C (-4.0 F)
1967
-13.3 C (8.1 F)
1968
-12.2 C (10.0 F)
1969
-15.6 C (3.9 F)
1970
-17.8 C (0.0 F)
1971
-13.9 C (7.0 F)
1972
-15.6 C (3.9 F)
1973
-12.8 C (9.0 F)
1974
-11.1 C (12.0 F)
1975
-12.2 C (10.0 F)
1976
-13.9 C (7.0 F)
1977
-18.3 C (-0.9 F)
1978
-12.2 C (10.0 F)
1979
-12.8 C (9.0 F)
1980
-13.3 C (8.1 F)
1981
-15.6 C (3.9 F)
1982
-19.4 C (-2.9 F)
1983
-23.3 C (-9.9 F)
1984
-14.4 C (6.1 F)
1986
-6.1 C (21.0 F)
1987
-11.7 C (10.9 F)
1988
-12.8 C (9.0 F)
1989
-17.8 C (0.0 F)
1990
-10.0 C (14.0 F)
1991
-11.1 C (12.0 F)
1992
-9.4 C (15.1 F)
1993
-13.3 C (8.1 F)
1994
-15.6 C (3.9 F)
1995
-12.8 C (9.0 F)
1996
-17.2 C (1.0 F)
1997
-11.1 C (12.0 F)
1998
-8.9 C (16.0 F)
1999
-12.8 C (9.0 F)
2000
-12.2 C (10.0 F)
2001
-12.2 C (10.0 F)
2002
-11.7 C (10.9 F)
2003
-14.4 C (6.1 F)
2004
-10.6 C (12.9 F)
2005
-10.0 C (14.0 F)
2006
-10.6 C (12.9 F)
2007
-10.0 C (14.0 F)
2008
-11.7 C (10.9 F)
2009
-12.2 C (10.0 F)
2010
-11.1 C (12.0 F)
2011
-11.7 C (10.9 F)
2012
-8.9 C (16.0 F)
2013
-7.8 C (18.0 F)
2014
-17.2 C (1.0 F)
2015
-13.9 C (7.0 F)
2016
-8.3 C (17.1 F)
2017
-12.2 C (10.0 F)
2018
-12.8 C (9.0 F)
2019
-8.3 C (17.1 F)
2020
-7.2 C (19.0 F)
2021
-8.3 C (17.1 F)
2022
-14.4 C (6.1 F)
2023
-6.1 C (21.0 F)
2024
-13.9 C (7.0 F)
2025
-13.3 C (8.1 F)
Wettest day (Rx1day)
The wettest day of the year at Heflin, 1956 to 2025. The record is 165.1 mm (6.5 in) in 1967, marked on the chart; the median year is 88.9 mm (3.5 in).
Wettest day (Rx1day) at Heflin by year
Year
Wettest day (Rx1day)
1956
63.5 mm (2.5 in)
1957
77.5 mm (3.1 in)
1958
85.1 mm (3.4 in)
1959
110.5 mm (4.4 in)
1960
52.8 mm (2.1 in)
1961
131.6 mm (5.2 in)
1962
83.8 mm (3.3 in)
1963
110.7 mm (4.4 in)
1964
103.6 mm (4.1 in)
1965
64.3 mm (2.5 in)
1966
87.9 mm (3.5 in)
1967
165.1 mm (6.5 in)
1968
163.3 mm (6.4 in)
1969
88.9 mm (3.5 in)
1970
146.1 mm (5.8 in)
1971
57.2 mm (2.3 in)
1972
103.4 mm (4.1 in)
1973
79.8 mm (3.1 in)
1974
67.3 mm (2.6 in)
1975
91.4 mm (3.6 in)
1976
124.0 mm (4.9 in)
1977
132.8 mm (5.2 in)
1978
74.4 mm (2.9 in)
1979
153.7 mm (6.1 in)
1980
71.1 mm (2.8 in)
1981
102.4 mm (4.0 in)
1982
137.2 mm (5.4 in)
1983
109.2 mm (4.3 in)
1984
106.4 mm (4.2 in)
1986
44.5 mm (1.8 in)
1987
61.0 mm (2.4 in)
1988
67.3 mm (2.6 in)
1989
61.5 mm (2.4 in)
1990
115.1 mm (4.5 in)
1991
104.6 mm (4.1 in)
1992
125.5 mm (4.9 in)
1993
65.5 mm (2.6 in)
1994
104.1 mm (4.1 in)
1995
134.6 mm (5.3 in)
1996
85.1 mm (3.4 in)
1997
98.0 mm (3.9 in)
1998
91.2 mm (3.6 in)
1999
61.0 mm (2.4 in)
2000
88.9 mm (3.5 in)
2001
78.5 mm (3.1 in)
2002
74.7 mm (2.9 in)
2003
111.0 mm (4.4 in)
2004
97.5 mm (3.8 in)
2005
104.6 mm (4.1 in)
2006
68.8 mm (2.7 in)
2007
30.7 mm (1.2 in)
2008
89.2 mm (3.5 in)
2009
91.7 mm (3.6 in)
2010
102.9 mm (4.1 in)
2011
76.5 mm (3.0 in)
2012
67.1 mm (2.6 in)
2013
89.4 mm (3.5 in)
2014
124.0 mm (4.9 in)
2015
88.9 mm (3.5 in)
2016
50.8 mm (2.0 in)
2017
75.4 mm (3.0 in)
2018
81.3 mm (3.2 in)
2019
78.2 mm (3.1 in)
2020
83.3 mm (3.3 in)
2021
85.9 mm (3.4 in)
2022
90.2 mm (3.6 in)
2023
54.9 mm (2.2 in)
2024
87.1 mm (3.4 in)
2025
119.4 mm (4.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Heflin, 1956 to 2025. The record is 309.7 mm (12.2 in) in 1961, marked on the chart; the median year is 131.5 mm (5.2 in).
Wettest five days (Rx5day) at Heflin by year
Year
Wettest five days (Rx5day)
1956
125.4 mm (4.9 in)
1957
148.6 mm (5.9 in)
1958
92.7 mm (3.6 in)
1959
138.0 mm (5.4 in)
1960
72.4 mm (2.9 in)
1961
309.7 mm (12.2 in)
1962
131.5 mm (5.2 in)
1963
163.8 mm (6.4 in)
1964
116.1 mm (4.6 in)
1965
85.7 mm (3.4 in)
1966
177.3 mm (7.0 in)
1967
233.9 mm (9.2 in)
1968
235.7 mm (9.3 in)
1969
167.8 mm (6.6 in)
1970
183.0 mm (7.2 in)
1971
97.8 mm (3.9 in)
1972
128.8 mm (5.1 in)
1973
110.5 mm (4.4 in)
1974
101.6 mm (4.0 in)
1975
140.2 mm (5.5 in)
1976
181.1 mm (7.1 in)
1977
132.8 mm (5.2 in)
1978
116.1 mm (4.6 in)
1979
196.4 mm (7.7 in)
1980
130.2 mm (5.1 in)
1981
103.4 mm (4.1 in)
1982
160.8 mm (6.3 in)
1983
201.1 mm (7.9 in)
1984
176.3 mm (6.9 in)
1986
64.4 mm (2.5 in)
1987
111.3 mm (4.4 in)
1988
85.6 mm (3.4 in)
1989
117.6 mm (4.6 in)
1990
187.5 mm (7.4 in)
1991
139.7 mm (5.5 in)
1992
149.5 mm (5.9 in)
1993
94.3 mm (3.7 in)
1994
137.8 mm (5.4 in)
1995
209.3 mm (8.2 in)
1996
118.4 mm (4.7 in)
1997
112.8 mm (4.4 in)
1998
135.2 mm (5.3 in)
1999
150.8 mm (5.9 in)
2000
135.7 mm (5.3 in)
2001
96.3 mm (3.8 in)
2002
128.8 mm (5.1 in)
2003
187.0 mm (7.4 in)
2004
145.6 mm (5.7 in)
2005
183.1 mm (7.2 in)
2006
114.0 mm (4.5 in)
2007
55.5 mm (2.2 in)
2008
163.3 mm (6.4 in)
2009
104.5 mm (4.1 in)
2010
128.1 mm (5.0 in)
2011
181.6 mm (7.1 in)
2012
115.6 mm (4.6 in)
2013
151.4 mm (6.0 in)
2014
124.0 mm (4.9 in)
2015
193.3 mm (7.6 in)
2016
94.7 mm (3.7 in)
2017
154.9 mm (6.1 in)
2018
114.1 mm (4.5 in)
2019
113.6 mm (4.5 in)
2020
154.4 mm (6.1 in)
2021
127.8 mm (5.0 in)
2022
129.3 mm (5.1 in)
2023
68.1 mm (2.7 in)
2024
130.6 mm (5.1 in)
2025
176.9 mm (7.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Heflin, 1956 to 2025. The record is 87 days in 2016, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Heflin by year
Year
Longest dry spell (CDD)
1956
18 days
1957
19 days
1958
37 days
1959
21 days
1960
21 days
1961
14 days
1962
18 days
1963
33 days
1964
33 days
1965
20 days
1966
17 days
1967
16 days
1968
20 days
1969
21 days
1970
24 days
1971
18 days
1972
16 days
1973
16 days
1974
21 days
1975
17 days
1976
24 days
1977
17 days
1978
27 days
1979
13 days
1980
20 days
1981
15 days
1982
12 days
1983
19 days
1984
25 days
1986
20 days
1987
23 days
1988
24 days
1989
17 days
1990
20 days
1991
16 days
1992
15 days
1993
18 days
1994
14 days
1995
17 days
1996
18 days
1997
21 days
1998
31 days
1999
28 days
2000
16 days
2001
29 days
2002
17 days
2003
31 days
2004
20 days
2005
28 days
2006
15 days
2007
20 days
2008
22 days
2009
12 days
2010
28 days
2011
12 days
2012
12 days
2013
16 days
2014
20 days
2015
13 days
2016
87 days
2017
16 days
2018
23 days
2019
23 days
2020
17 days
2021
15 days
2022
30 days
2023
24 days
2024
44 days
2025
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
55 years with a frost
Across 55 years with a frost, the median last spring frost at Heflin falls on 10 April and the median first autumn frost on 26 October, which leaves a median of 196 days between them.
Fitted over all years, the growing season changes by +4.6 days per decade at this station.
Frost dates and growing season at Heflin
Measure
Median, all years
Earliest period
Recent period (1994 to 2025)
Recent against earliest
Fitted trend
Last spring frost
10 April
n/a
5 April
n/a
-2.3 days per decade
First autumn frost
26 October
n/a
1 November
n/a
+2.3 days per decade
Growing days
196 days
n/a
209 days
n/a
+4.6 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
60 years, 1956 to 2025
A day with at least 89.8 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 164.9 mm (6.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Heflin: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
89.8 mm (3.5 in)
5 years
114.1 mm (4.5 in)
10 years
128.3 mm (5.1 in)
25 years
144.4 mm (5.7 in)
50 years
155.2 mm (6.1 in)
100 years
164.9 mm (6.5 in)
Longer than the 60 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, 60 years of values from 1956 to 2025.
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: 165.1 mm (6.5 in) in 1967; 153.7 mm (6.1 in) in 1979; 146.1 mm (5.8 in) in 1970.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2009 to 2025 against 1961 to 1990
Over 2009 to 2025, Heflin had a mean temperature of 16.2 C (61.1 F) and 1,483.6 mm (58.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Rockford 3 ESE (United States, 101 km away), Pickens (United States, 299 km away) and Opelika (United States, 110 km away).
Climate twins of Heflin: stations whose 1961 to 1990 climate is closest to its 2009 to 2025 climate
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 Heflin standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Heflin 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.