Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Hefei. The lines show the 2026 daily maximum and minimum. 32 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Hefei, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
22.1 C (71.8 F)
-20.6 C (-5.1 F)
18.3 C (64.9 F)
-8.0 C (17.6 F)
Feb
28.7 C (83.7 F)
-14.1 C (6.6 F)
22.6 C (72.7 F)
-9.8 C (14.4 F)
Mar
32.5 C (90.5 F)
-7.3 C (18.9 F)
32.5 C (90.5 F)
-0.9 C (30.4 F)
Apr
34.7 C (94.5 F)
-0.4 C (31.3 F)
32.0 C (89.6 F)
2.9 C (37.2 F)
May
37.3 C (99.1 F)
6.2 C (43.2 F)
35.3 C (95.5 F)
9.7 C (49.5 F)
Jun
38.0 C (100.4 F)
12.2 C (54.0 F)
34.9 C (94.8 F)
13.9 C (57.0 F)
Jul
41.1 C (106.0 F)
17.5 C (63.5 F)
39.7 C (103.5 F)
23.9 C (75.0 F)
Aug
41.0 C (105.8 F)
15.8 C (60.4 F)
38.3 C (100.9 F)
24.0 C (75.2 F)
Sep
38.6 C (101.5 F)
10.8 C (51.4 F)
n/a
n/a
Oct
34.7 C (94.5 F)
0.0 C (32.0 F)
n/a
n/a
Nov
30.3 C (86.5 F)
-5.1 C (22.8 F)
n/a
n/a
Dec
24.0 C (75.2 F)
-13.5 C (7.7 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hefei still stand. 2022 holds the most, with 43.
Standing records at Hefei by the year they were set
Year set
Standing records
1952
19
1953
10
1954
13
1955
39
1956
21
1957
25
1958
36
1959
21
1960
22
1961
11
1962
14
1963
14
1964
19
1965
9
1966
31
1967
30
1968
29
1969
41
1970
17
1971
8
1972
24
1973
10
1974
19
1975
9
1976
14
1977
13
1978
19
1979
20
1980
22
1981
16
1982
16
1983
11
1984
16
1985
22
1986
14
1987
39
1988
25
1989
17
1990
4
1991
23
1992
22
1993
25
1994
19
1995
9
1996
12
1997
20
1998
25
1999
25
2000
15
2001
18
2002
36
2003
34
2004
11
2005
24
2006
17
2007
22
2008
16
2009
22
2010
30
2011
27
2012
6
2013
16
2014
6
2015
7
2016
12
2017
16
2018
13
2019
10
2020
17
2021
22
2022
43
2023
40
2024
19
2025
26
All-Time Record Progression
6 new records
6 all-time records were set at Hefei between 13 June 1984 and 27 July 2017. Each dot is a new record.
When Hefei set new all-time records
Date
Kind
Detail
1984-06-13
Record daily precipitation
Record daily precipitation 238.4 mm (9.4 in)
1988-07-20
Record high minimum temperature
Record high minimum temperature 30.6 C (87.1 F)
2001-07-25
Record high minimum temperature
Record high minimum temperature 30.7 C (87.3 F)
2003-07-31
Record high minimum temperature
Record high minimum temperature 31.4 C (88.5 F)
2003-08-01
Record high minimum temperature
Record high minimum temperature 31.6 C (88.9 F)
2017-07-27
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
Wettest Day of Each Month
Jun: 238.4 mm (9.4 in)
The wettest day on record for each calendar month at Hefei. The most was 238.4 mm (9.4 in) on 13 June 1984.
Record daily precipitation for each month at Hefei
Month
Record daily precipitation (mm)
Date
Jan
39.7 mm (1.6 in)
18 January 1984
Feb
35.0 mm (1.4 in)
20 February 1990
Mar
55.4 mm (2.2 in)
26 March 2020
Apr
100.2 mm (3.9 in)
30 April 1967
May
108.1 mm (4.3 in)
19 May 1988
Jun
238.4 mm (9.4 in)
13 June 1984
Jul
199.1 mm (7.8 in)
18 July 2020
Aug
161.8 mm (6.4 in)
17 August 2018
Sep
109.6 mm (4.3 in)
24 September 1971
Oct
99.8 mm (3.9 in)
11 October 1975
Nov
52.3 mm (2.1 in)
1 November 1987
Dec
39.5 mm (1.6 in)
24 December 1991
Period of Record Coverage
1952 to 2025
Complete yearUnder 90 percent of days
74 years of record at Hefei, 1952 to 2025. 13 years have data for under 90 percent of days and are left out of rankings: 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 61 complete years at Hefei, 1952 to 2012. Blue stripes are years cooler than the station's own mean of 16.4 C (61.4 F); red stripes are warmer. The coolest year was 1952, at 15.3 C (59.6 F), and the warmest was 2007, at 17.8 C (64.1 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Hefei as warming stripes, 1952 to 2012
Year
Annual mean temperature
Difference from the station mean
1952
15.3 C
-1.01 C
1953
16.5 C
+0.11 C
1954
15.5 C
-0.81 C
1955
15.8 C
-0.56 C
1956
15.4 C
-0.96 C
1957
15.5 C
-0.87 C
1958
16.3 C
-0.09 C
1959
16.6 C
+0.20 C
1960
16.5 C
+0.10 C
1961
17.3 C
+0.92 C
1962
16.2 C
-0.17 C
1963
16.2 C
-0.17 C
1964
16.3 C
-0.06 C
1965
16.2 C
-0.20 C
1966
16.6 C
+0.21 C
1967
16.2 C
-0.20 C
1968
16.3 C
-0.05 C
1969
15.4 C
-0.98 C
1970
15.7 C
-0.67 C
1971
16.0 C
-0.40 C
1972
15.5 C
-0.88 C
1973
16.1 C
-0.23 C
1974
15.7 C
-0.62 C
1975
16.3 C
-0.06 C
1976
16.0 C
-0.32 C
1977
16.1 C
-0.30 C
1978
17.0 C
+0.65 C
1979
16.5 C
+0.16 C
1980
15.4 C
-0.96 C
1981
15.9 C
-0.48 C
1982
15.9 C
-0.41 C
1983
16.0 C
-0.35 C
1984
15.4 C
-0.91 C
1985
15.6 C
-0.72 C
1986
16.0 C
-0.31 C
1987
16.1 C
-0.23 C
1988
16.1 C
-0.24 C
1989
15.8 C
-0.58 C
1990
16.7 C
+0.35 C
1991
16.0 C
-0.40 C
1992
16.3 C
-0.03 C
1993
15.8 C
-0.53 C
1994
17.4 C
+1.03 C
1995
16.9 C
+0.51 C
1996
16.2 C
-0.20 C
1997
17.0 C
+0.60 C
1998
17.5 C
+1.10 C
1999
16.8 C
+0.46 C
2000
17.2 C
+0.80 C
2001
17.2 C
+0.86 C
2002
17.7 C
+1.37 C
2003
16.8 C
+0.48 C
2004
17.1 C
+0.79 C
2005
16.6 C
+0.27 C
2006
17.4 C
+1.07 C
2007
17.8 C
+1.47 C
2008
16.9 C
+0.50 C
2009
17.1 C
+0.74 C
2010
16.9 C
+0.56 C
2011
16.7 C
+0.31 C
2012
16.8 C
+0.47 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1952 to 2012. In Fahrenheit: 0.4 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hefei
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
1952 to 2012
61
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.5) per decade
1952 to 2012
61
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.3 to 0.5) per decade
1952 to 2012
61
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
1952 to 2025
Yearly extremes at Hefei: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
2017
37.6 C (99.7 F)
74
Coldest night (TNn)
-20.6 C (-5.1 F)
1955
-7.6 C (18.2 F)
74
Wettest day (Rx1day)
238.4 mm (9.4 in)
1984
87.9 mm (3.5 in)
74
Wettest five days (Rx5day)
330.1 mm (13.0 in)
2020
130.6 mm (5.1 in)
74
Longest dry spell (CDD)
67 days
1988
27 days
74
Hottest day (TXx)
The hottest day of the year at Hefei, 1952 to 2025. The record is 41.1 C (106.0 F) in 2017, marked on the chart; the median year is 37.6 C (99.7 F).
Hottest day (TXx) at Hefei by year
Year
Hottest day (TXx)
1952
38.0 C (100.4 F)
1953
37.9 C (100.2 F)
1954
36.4 C (97.5 F)
1955
37.0 C (98.6 F)
1956
36.7 C (98.1 F)
1957
36.4 C (97.5 F)
1958
38.8 C (101.8 F)
1959
41.0 C (105.8 F)
1960
36.1 C (97.0 F)
1961
39.7 C (103.5 F)
1962
37.5 C (99.5 F)
1963
35.5 C (95.9 F)
1964
38.1 C (100.6 F)
1965
37.1 C (98.8 F)
1966
39.1 C (102.4 F)
1967
40.3 C (104.5 F)
1968
36.6 C (97.9 F)
1969
37.1 C (98.8 F)
1970
37.7 C (99.9 F)
1971
38.9 C (102.0 F)
1972
37.2 C (99.0 F)
1973
36.3 C (97.3 F)
1974
36.3 C (97.3 F)
1975
35.7 C (96.3 F)
1976
38.2 C (100.8 F)
1977
37.2 C (99.0 F)
1978
38.3 C (100.9 F)
1979
37.4 C (99.3 F)
1980
36.3 C (97.3 F)
1981
37.8 C (100.0 F)
1982
35.7 C (96.3 F)
1983
38.0 C (100.4 F)
1984
36.7 C (98.1 F)
1985
36.6 C (97.9 F)
1986
37.4 C (99.3 F)
1987
35.0 C (95.0 F)
1988
39.1 C (102.4 F)
1989
36.4 C (97.5 F)
1990
37.5 C (99.5 F)
1991
37.7 C (99.9 F)
1992
37.9 C (100.2 F)
1993
35.7 C (96.3 F)
1994
38.1 C (100.6 F)
1995
38.6 C (101.5 F)
1996
37.0 C (98.6 F)
1997
36.2 C (97.2 F)
1998
37.6 C (99.7 F)
1999
36.4 C (97.5 F)
2000
37.8 C (100.0 F)
2001
38.5 C (101.3 F)
2002
37.9 C (100.2 F)
2003
40.3 C (104.5 F)
2004
37.4 C (99.3 F)
2005
37.6 C (99.7 F)
2006
37.1 C (98.8 F)
2007
37.2 C (99.0 F)
2008
36.1 C (97.0 F)
2009
38.1 C (100.6 F)
2010
38.8 C (101.8 F)
2011
37.1 C (98.8 F)
2012
37.8 C (100.0 F)
2013
39.6 C (103.3 F)
2014
37.7 C (99.9 F)
2015
37.1 C (98.8 F)
2016
39.1 C (102.4 F)
2017
41.1 C (106.0 F)
2018
38.1 C (100.6 F)
2019
38.3 C (100.9 F)
2020
37.6 C (99.7 F)
2021
36.2 C (97.2 F)
2022
40.1 C (104.2 F)
2023
37.8 C (100.0 F)
2024
39.4 C (102.9 F)
2025
39.7 C (103.5 F)
Coldest night (TNn)
The coldest night of the year at Hefei, 1952 to 2025. The record is -20.6 C (-5.1 F) in 1955, marked on the chart; the median year is -7.6 C (18.2 F).
Coldest night (TNn) at Hefei by year
Year
Coldest night (TNn)
1952
-6.5 C (20.3 F)
1953
-6.9 C (19.6 F)
1954
-10.6 C (12.9 F)
1955
-20.6 C (-5.1 F)
1956
-16.7 C (1.9 F)
1957
-12.8 C (9.0 F)
1958
-9.6 C (14.7 F)
1959
-7.4 C (18.7 F)
1960
-7.3 C (18.9 F)
1961
-6.2 C (20.8 F)
1962
-7.6 C (18.3 F)
1963
-7.8 C (18.0 F)
1964
-11.3 C (11.7 F)
1965
-8.4 C (16.9 F)
1966
-13.1 C (8.4 F)
1967
-8.2 C (17.2 F)
1968
-6.9 C (19.6 F)
1969
-14.1 C (6.6 F)
1970
-10.5 C (13.1 F)
1971
-7.1 C (19.2 F)
1972
-7.2 C (19.0 F)
1973
-9.9 C (14.2 F)
1974
-7.6 C (18.3 F)
1975
-5.5 C (22.1 F)
1976
-7.9 C (17.8 F)
1977
-10.2 C (13.6 F)
1978
-6.7 C (19.9 F)
1979
-6.6 C (20.1 F)
1980
-9.7 C (14.5 F)
1981
-7.4 C (18.7 F)
1982
-6.8 C (19.8 F)
1983
-5.7 C (21.7 F)
1984
-12.2 C (10.0 F)
1985
-6.2 C (20.8 F)
1986
-8.6 C (16.5 F)
1987
-5.6 C (21.9 F)
1988
-7.0 C (19.4 F)
1989
-4.5 C (23.9 F)
1990
-9.5 C (14.9 F)
1991
-13.5 C (7.7 F)
1992
-4.3 C (24.3 F)
1993
-10.0 C (14.0 F)
1994
-4.5 C (23.9 F)
1995
-5.3 C (22.5 F)
1996
-8.5 C (16.7 F)
1997
-6.5 C (20.3 F)
1998
-10.5 C (13.1 F)
1999
-6.9 C (19.6 F)
2000
-8.9 C (16.0 F)
2001
-5.8 C (21.6 F)
2002
-6.2 C (20.8 F)
2003
-6.3 C (20.7 F)
2004
-7.7 C (18.1 F)
2005
-8.8 C (16.2 F)
2006
-6.2 C (20.8 F)
2007
-3.5 C (25.7 F)
2008
-11.2 C (11.8 F)
2009
-7.9 C (17.8 F)
2010
-5.4 C (22.3 F)
2011
-7.6 C (18.3 F)
2012
-6.6 C (20.1 F)
2013
-7.8 C (18.0 F)
2014
-6.4 C (20.5 F)
2015
-5.7 C (21.7 F)
2016
-9.8 C (14.4 F)
2017
-5.1 C (22.8 F)
2018
-10.3 C (13.5 F)
2019
-5.5 C (22.1 F)
2020
-9.5 C (14.9 F)
2021
-11.0 C (12.2 F)
2022
-8.3 C (17.1 F)
2023
-11.7 C (10.9 F)
2024
-7.9 C (17.8 F)
2025
-9.8 C (14.4 F)
Wettest day (Rx1day)
The wettest day of the year at Hefei, 1952 to 2025. The record is 238.4 mm (9.4 in) in 1984, marked on the chart; the median year is 87.9 mm (3.5 in).
Wettest day (Rx1day) at Hefei by year
Year
Wettest day (Rx1day)
1952
85.4 mm (3.4 in)
1953
51.9 mm (2.0 in)
1954
129.4 mm (5.1 in)
1955
70.5 mm (2.8 in)
1956
68.7 mm (2.7 in)
1957
91.7 mm (3.6 in)
1958
129.0 mm (5.1 in)
1959
88.9 mm (3.5 in)
1960
97.9 mm (3.9 in)
1961
74.2 mm (2.9 in)
1962
105.2 mm (4.1 in)
1963
68.9 mm (2.7 in)
1964
102.2 mm (4.0 in)
1965
53.8 mm (2.1 in)
1966
46.9 mm (1.8 in)
1967
100.2 mm (3.9 in)
1968
51.9 mm (2.0 in)
1969
80.1 mm (3.2 in)
1970
96.0 mm (3.8 in)
1971
109.6 mm (4.3 in)
1972
111.0 mm (4.4 in)
1973
55.9 mm (2.2 in)
1974
129.6 mm (5.1 in)
1975
99.8 mm (3.9 in)
1976
51.0 mm (2.0 in)
1977
89.8 mm (3.5 in)
1978
101.9 mm (4.0 in)
1979
92.1 mm (3.6 in)
1980
86.2 mm (3.4 in)
1981
58.6 mm (2.3 in)
1982
82.1 mm (3.2 in)
1983
90.3 mm (3.6 in)
1984
238.4 mm (9.4 in)
1985
58.5 mm (2.3 in)
1986
45.6 mm (1.8 in)
1987
96.7 mm (3.8 in)
1988
108.1 mm (4.3 in)
1989
82.1 mm (3.2 in)
1990
86.9 mm (3.4 in)
1991
90.1 mm (3.5 in)
1992
51.4 mm (2.0 in)
1993
52.6 mm (2.1 in)
1994
78.3 mm (3.1 in)
1995
81.0 mm (3.2 in)
1996
75.5 mm (3.0 in)
1997
47.4 mm (1.9 in)
1998
63.3 mm (2.5 in)
1999
91.8 mm (3.6 in)
2000
71.6 mm (2.8 in)
2001
62.9 mm (2.5 in)
2002
104.0 mm (4.1 in)
2003
123.1 mm (4.8 in)
2004
101.2 mm (4.0 in)
2005
126.4 mm (5.0 in)
2006
78.0 mm (3.1 in)
2007
96.2 mm (3.8 in)
2008
124.7 mm (4.9 in)
2009
61.1 mm (2.4 in)
2010
146.6 mm (5.8 in)
2011
75.6 mm (3.0 in)
2012
120.4 mm (4.7 in)
2013
67.1 mm (2.6 in)
2014
98.8 mm (3.9 in)
2015
154.2 mm (6.1 in)
2016
107.2 mm (4.2 in)
2017
62.2 mm (2.4 in)
2018
161.8 mm (6.4 in)
2019
61.5 mm (2.4 in)
2020
199.1 mm (7.8 in)
2021
188.7 mm (7.4 in)
2022
49.0 mm (1.9 in)
2023
47.0 mm (1.9 in)
2024
97.8 mm (3.9 in)
2025
44.2 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hefei, 1952 to 2025. The record is 330.1 mm (13.0 in) in 2020, marked on the chart; the median year is 130.6 mm (5.1 in).
Wettest five days (Rx5day) at Hefei by year
Year
Wettest five days (Rx5day)
1952
97.5 mm (3.8 in)
1953
88.8 mm (3.5 in)
1954
212.1 mm (8.4 in)
1955
186.3 mm (7.3 in)
1956
137.3 mm (5.4 in)
1957
135.9 mm (5.4 in)
1958
165.4 mm (6.5 in)
1959
176.8 mm (7.0 in)
1960
131.7 mm (5.2 in)
1961
78.2 mm (3.1 in)
1962
165.5 mm (6.5 in)
1963
127.0 mm (5.0 in)
1964
163.9 mm (6.5 in)
1965
90.9 mm (3.6 in)
1966
87.2 mm (3.4 in)
1967
105.0 mm (4.1 in)
1968
74.2 mm (2.9 in)
1969
167.0 mm (6.6 in)
1970
148.7 mm (5.9 in)
1971
161.8 mm (6.4 in)
1972
137.3 mm (5.4 in)
1973
97.3 mm (3.8 in)
1974
250.6 mm (9.9 in)
1975
130.1 mm (5.1 in)
1976
93.4 mm (3.7 in)
1977
159.0 mm (6.3 in)
1978
102.5 mm (4.0 in)
1979
106.5 mm (4.2 in)
1980
149.5 mm (5.9 in)
1981
98.0 mm (3.9 in)
1982
154.7 mm (6.1 in)
1983
129.3 mm (5.1 in)
1984
254.2 mm (10.0 in)
1985
95.8 mm (3.8 in)
1986
108.2 mm (4.3 in)
1987
223.0 mm (8.8 in)
1988
124.2 mm (4.9 in)
1989
189.2 mm (7.4 in)
1990
131.1 mm (5.2 in)
1991
253.8 mm (10.0 in)
1992
101.4 mm (4.0 in)
1993
90.9 mm (3.6 in)
1994
118.4 mm (4.7 in)
1995
107.2 mm (4.2 in)
1996
121.2 mm (4.8 in)
1997
85.3 mm (3.4 in)
1998
121.8 mm (4.8 in)
1999
125.0 mm (4.9 in)
2000
107.0 mm (4.2 in)
2001
77.5 mm (3.1 in)
2002
153.3 mm (6.0 in)
2003
232.2 mm (9.1 in)
2004
144.2 mm (5.7 in)
2005
137.4 mm (5.4 in)
2006
96.5 mm (3.8 in)
2007
111.1 mm (4.4 in)
2008
143.3 mm (5.6 in)
2009
114.9 mm (4.5 in)
2010
207.4 mm (8.2 in)
2011
156.9 mm (6.2 in)
2012
124.8 mm (4.9 in)
2013
205.0 mm (8.1 in)
2014
132.6 mm (5.2 in)
2015
178.1 mm (7.0 in)
2016
206.3 mm (8.1 in)
2017
82.4 mm (3.2 in)
2018
279.6 mm (11.0 in)
2019
39.4 mm (1.6 in)
2020
330.1 mm (13.0 in)
2021
260.3 mm (10.2 in)
2022
123.9 mm (4.9 in)
2023
54.6 mm (2.1 in)
2024
202.7 mm (8.0 in)
2025
103.6 mm (4.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hefei, 1952 to 2025. The record is 67 days in 1988, marked on the chart; the median year is 27 days.
Longest dry spell (CDD) at Hefei by year
Year
Longest dry spell (CDD)
1952
30 days
1953
23 days
1954
37 days
1955
28 days
1956
56 days
1957
22 days
1958
37 days
1959
36 days
1960
23 days
1961
20 days
1962
25 days
1963
37 days
1964
24 days
1965
26 days
1966
31 days
1967
33 days
1968
34 days
1969
44 days
1970
26 days
1971
43 days
1972
34 days
1973
53 days
1974
31 days
1975
23 days
1976
36 days
1977
42 days
1978
20 days
1979
53 days
1980
34 days
1981
19 days
1982
21 days
1983
34 days
1984
30 days
1985
16 days
1986
29 days
1987
38 days
1988
67 days
1989
38 days
1990
21 days
1991
61 days
1992
27 days
1993
31 days
1994
28 days
1995
51 days
1996
27 days
1997
30 days
1998
47 days
1999
34 days
2000
24 days
2001
24 days
2002
25 days
2003
27 days
2004
35 days
2005
25 days
2006
24 days
2007
22 days
2008
33 days
2009
17 days
2010
26 days
2011
23 days
2012
24 days
2013
6 days
2014
4 days
2015
4 days
2016
3 days
2017
4 days
2018
4 days
2019
16 days
2020
26 days
2021
22 days
2022
31 days
2023
20 days
2024
21 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
61 years with a frost
Across 61 years with a frost, the median last spring frost at Hefei falls on 3 March and the median first autumn frost on 29 November, which leaves a median of 271 days between them.
In 1983 to 2012 the median growing season was 275 days. That is 9 days more than in 1952 to 1981.
Fitted over all years, the growing season changes by +3.0 days per decade at this station.
Frost dates and growing season at Hefei
Measure
Median, all years
Earliest period (1952 to 1981)
Recent period (1983 to 2012)
Recent against earliest
Fitted trend
Last spring frost
3 March
4 March
3 March
1 day earlier
-1.3 days per decade
First autumn frost
29 November
27 November
2 December
5 days later
+1.7 days per decade
Growing days
271 days
266 days
275 days
9 days more
+3.0 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
66 years, 1952 to 2024
A day with at least 83.6 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 208.8 mm (8.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Hefei: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
83.6 mm (3.3 in)
5 years
114.0 mm (4.5 in)
10 years
135.4 mm (5.3 in)
25 years
163.7 mm (6.4 in)
50 years
185.8 mm (7.3 in)
100 years
208.8 mm (8.2 in)
Longer than the 66 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, 66 years of values from 1952 to 2024.
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: 238.4 mm (9.4 in) in 1984; 199.1 mm (7.8 in) in 2020; 188.7 mm (7.4 in) in 2021.
Station Changes
3 suspected
3 changes were suspected in the annual mean temperature of Hefei, at 1957, 2003 and 2008. Each is measured against neighbouring stations.
Relative to 4 neighbouring stations, the station's annual mean temperature from 1957 ran 0.4 C (0.7 F) higher than in the years before (likely change).
Relative to 4 neighbouring stations, the station's annual mean temperature from 2003 ran 0.3 C (0.5 F) lower than in the years before (likely change).
Relative to 4 neighbouring stations, the station's annual mean temperature from 2008 ran 0.5 C (0.9 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Hefei, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1957
+0.4
+0.7
likely
4
2003
-0.3
-0.5
likely
4
2008
+0.5
+0.9
possible
4
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Hefei standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hefei 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.