Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Hezuo. The lines show the 2026 daily maximum and minimum. 13 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Hezuo, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.1 C (62.8 F)
-33.0 C (-27.4 F)
9.8 C (49.6 F)
-24.9 C (-12.8 F)
Feb
18.6 C (65.5 F)
-29.9 C (-21.8 F)
13.6 C (56.5 F)
-20.1 C (-4.2 F)
Mar
23.6 C (74.5 F)
-25.1 C (-13.2 F)
20.0 C (68.0 F)
-15.2 C (4.6 F)
Apr
29.2 C (84.6 F)
-20.2 C (-4.4 F)
26.4 C (79.5 F)
-8.8 C (16.2 F)
May
27.2 C (81.0 F)
-10.0 C (14.0 F)
26.5 C (79.7 F)
-4.9 C (23.2 F)
Jun
28.5 C (83.3 F)
-5.2 C (22.6 F)
25.4 C (77.7 F)
0.8 C (33.4 F)
Jul
30.4 C (86.7 F)
-0.6 C (30.9 F)
27.9 C (82.2 F)
1.8 C (35.2 F)
Aug
29.8 C (85.6 F)
-1.3 C (29.7 F)
27.2 C (81.0 F)
4.6 C (40.3 F)
Sep
28.1 C (82.6 F)
-5.7 C (21.7 F)
n/a
n/a
Oct
24.6 C (76.3 F)
-17.0 C (1.4 F)
n/a
n/a
Nov
20.4 C (68.7 F)
-23.8 C (-10.8 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-27.9 C (-18.2 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hezuo still stand. 1957 holds the most, with 86.
Standing records at Hezuo by the year they were set
Year set
Standing records
1957
86
1958
10
1959
29
1960
28
1961
27
1962
22
1963
13
1964
29
1965
30
1966
22
1967
16
1968
22
1969
36
1970
33
1971
15
1972
18
1973
16
1974
29
1975
28
1976
20
1977
24
1978
24
1979
10
1980
19
1981
21
1982
15
1983
14
1984
22
1985
12
1986
23
1987
31
1988
23
1989
20
1990
11
1991
23
1992
20
1993
22
1994
17
1995
28
1996
14
1997
14
1998
26
1999
20
2000
22
2001
25
2002
23
2003
18
2004
19
2005
13
2006
35
2007
18
2008
22
2009
27
2010
38
2011
25
2012
16
2013
5
2014
13
2015
11
2016
6
2017
2
2018
13
2019
4
2020
12
2021
13
2022
38
2023
10
2024
38
2025
16
All-Time Record Progression
8 new records
8 all-time records were set at Hezuo between 27 July 1995 and 15 July 2006. Each dot is a new record.
When Hezuo set new all-time records
Date
Kind
Detail
1995-07-27
Record high minimum temperature
Record high minimum temperature 14.8 C (58.6 F)
1996-07-06
Record daily precipitation
Record daily precipitation 83.7 mm (3.3 in)
1997-08-04
Record high minimum temperature
Record high minimum temperature 15.0 C (59.0 F)
1997-08-05
Record high minimum temperature
Record high minimum temperature 15.1 C (59.2 F)
1998-04-27
Record high maximum temperature
Record high maximum temperature 29.2 C (84.6 F)
2000-07-24
Record high maximum temperature
Record high maximum temperature 30.2 C (86.4 F)
2000-07-25
Record high maximum temperature
Record high maximum temperature 30.4 C (86.7 F)
2006-07-15
Record high minimum temperature
Record high minimum temperature 15.8 C (60.4 F)
Wettest Day of Each Month
Jul: 83.7 mm (3.3 in)
The wettest day on record for each calendar month at Hezuo. The most was 83.7 mm (3.3 in) on 6 July 1996.
Record daily precipitation for each month at Hezuo
Month
Record daily precipitation (mm)
Date
Jan
30.0 mm (1.2 in)
31 January 2018
Feb
30.0 mm (1.2 in)
1 February 2018
Mar
21.9 mm (0.9 in)
20 March 2008
Apr
40.1 mm (1.6 in)
15 April 2014
May
48.3 mm (1.9 in)
26 May 1981
Jun
42.6 mm (1.7 in)
4 June 2006
Jul
83.7 mm (3.3 in)
6 July 1996
Aug
65.0 mm (2.6 in)
22 August 2016
Sep
47.5 mm (1.9 in)
8 September 2024
Oct
25.2 mm (1.0 in)
1 October 2007
Nov
20.1 mm (0.8 in)
17 November 2018
Dec
9.9 mm (0.39 in)
17 December 2015
Period of Record Coverage
1957 to 2025
Complete yearUnder 90 percent of days
69 years of record at Hezuo, 1957 to 2025. 10 years have data for under 90 percent of days and are left out of rankings: 2013, 2015, 2016, 2017, 2018, 2019, 2022, 2023 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 58 complete years at Hezuo, 1957 to 2021. Blue stripes are years cooler than the station's own mean of 3.7 C (38.6 F); red stripes are warmer. The coolest year was 1957, at 0.8 C (33.5 F), and the warmest was 2010, at 5.2 C (41.3 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Hezuo as warming stripes, 1957 to 2021
Year
Annual mean temperature
Difference from the station mean
1957
0.8 C
-2.82 C
1958
3.8 C
+0.09 C
1959
3.3 C
-0.34 C
1960
3.4 C
-0.22 C
1961
2.8 C
-0.82 C
1962
2.7 C
-0.99 C
1963
3.2 C
-0.50 C
1964
3.5 C
-0.17 C
1965
2.9 C
-0.73 C
1966
3.3 C
-0.33 C
1967
2.7 C
-0.97 C
1968
2.8 C
-0.91 C
1969
3.3 C
-0.37 C
1970
2.6 C
-1.06 C
1971
3.3 C
-0.32 C
1972
3.6 C
-0.08 C
1973
3.7 C
+0.07 C
1974
3.2 C
-0.46 C
1975
3.3 C
-0.36 C
1976
2.8 C
-0.91 C
1977
2.7 C
-0.97 C
1978
3.5 C
-0.13 C
1979
3.5 C
-0.12 C
1980
3.5 C
-0.14 C
1981
3.8 C
+0.18 C
1982
3.2 C
-0.44 C
1983
2.7 C
-0.94 C
1984
3.2 C
-0.50 C
1985
3.2 C
-0.42 C
1986
3.2 C
-0.49 C
1987
4.0 C
+0.30 C
1988
3.9 C
+0.22 C
1989
3.7 C
+0.00 C
1990
4.0 C
+0.37 C
1991
4.0 C
+0.30 C
1992
3.4 C
-0.29 C
1993
3.7 C
+0.06 C
1994
4.3 C
+0.66 C
1995
3.5 C
-0.13 C
1996
3.6 C
-0.03 C
1997
3.7 C
+0.06 C
1998
5.0 C
+1.33 C
1999
4.7 C
+0.99 C
2000
4.0 C
+0.33 C
2001
4.4 C
+0.73 C
2002
4.5 C
+0.83 C
2003
4.6 C
+0.97 C
2004
4.1 C
+0.45 C
2005
4.4 C
+0.69 C
2006
5.0 C
+1.38 C
2007
4.4 C
+0.77 C
2008
4.0 C
+0.37 C
2009
4.8 C
+1.18 C
2010
5.2 C
+1.50 C
2011
4.4 C
+0.75 C
2012
4.3 C
+0.64 C
2020
4.4 C
+0.75 C
2021
4.6 C
+0.93 C
The annual mean temperature here has risen by 0.3 C (0.3 to 0.4) per decade over 1957 to 2021. In Fahrenheit: 0.6 F (0.5 to 0.7) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hezuo
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.3 to 0.4) per decade
0.6 F (0.5 to 0.7) per decade
1957 to 2021
58
Rise
Mean daily maximum
0.4 C (0.3 to 0.5) per decade
0.7 F (0.5 to 0.9) per decade
1957 to 2021
58
Rise
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.4 to 0.7) per decade
1957 to 2021
58
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
1957 to 2025
Yearly extremes at Hezuo: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
30.4 C (86.7 F)
2000
26.4 C (79.5 F)
69
Coldest night (TNn)
-33.0 C (-27.4 F)
1957
-24.3 C (-11.7 F)
69
Wettest day (Rx1day)
83.7 mm (3.3 in)
1996
31.6 mm (1.2 in)
69
Wettest five days (Rx5day)
130.2 mm (5.1 in)
2018
56.9 mm (2.2 in)
69
Longest dry spell (CDD)
93 days
1962
45 days
69
Hottest day (TXx)
The hottest day of the year at Hezuo, 1957 to 2025. The record is 30.4 C (86.7 F) in 2000, marked on the chart; the median year is 26.4 C (79.5 F).
Hottest day (TXx) at Hezuo by year
Year
Hottest day (TXx)
1957
27.1 C (80.8 F)
1958
27.3 C (81.1 F)
1959
25.9 C (78.6 F)
1960
25.3 C (77.5 F)
1961
27.7 C (81.9 F)
1962
23.7 C (74.7 F)
1963
24.6 C (76.3 F)
1964
23.5 C (74.3 F)
1965
24.7 C (76.5 F)
1966
26.7 C (80.1 F)
1967
25.7 C (78.3 F)
1968
24.0 C (75.2 F)
1969
25.5 C (77.9 F)
1970
25.5 C (77.9 F)
1971
27.6 C (81.7 F)
1972
28.2 C (82.8 F)
1973
25.6 C (78.1 F)
1974
25.2 C (77.4 F)
1975
28.4 C (83.1 F)
1976
25.9 C (78.6 F)
1977
25.9 C (78.6 F)
1978
28.2 C (82.8 F)
1979
26.4 C (79.5 F)
1980
24.8 C (76.6 F)
1981
27.2 C (81.0 F)
1982
23.6 C (74.5 F)
1983
25.5 C (77.9 F)
1984
25.2 C (77.4 F)
1985
27.5 C (81.5 F)
1986
27.6 C (81.7 F)
1987
25.6 C (78.1 F)
1988
27.2 C (81.0 F)
1989
26.4 C (79.5 F)
1990
24.9 C (76.8 F)
1991
26.1 C (79.0 F)
1992
25.9 C (78.6 F)
1993
27.2 C (81.0 F)
1994
27.2 C (81.0 F)
1995
28.1 C (82.6 F)
1996
26.8 C (80.2 F)
1997
26.3 C (79.3 F)
1998
29.2 C (84.6 F)
1999
27.2 C (81.0 F)
2000
30.4 C (86.7 F)
2001
27.9 C (82.2 F)
2002
27.1 C (80.8 F)
2003
27.6 C (81.7 F)
2004
25.8 C (78.4 F)
2005
26.2 C (79.2 F)
2006
28.7 C (83.7 F)
2007
25.8 C (78.4 F)
2008
26.4 C (79.5 F)
2009
26.3 C (79.3 F)
2010
29.5 C (85.1 F)
2011
28.1 C (82.6 F)
2012
26.4 C (79.5 F)
2013
25.6 C (78.1 F)
2014
27.1 C (80.8 F)
2015
26.6 C (79.9 F)
2016
26.1 C (79.0 F)
2017
26.7 C (80.1 F)
2018
26.2 C (79.2 F)
2019
25.6 C (78.1 F)
2020
25.0 C (77.0 F)
2021
28.2 C (82.8 F)
2022
29.8 C (85.6 F)
2023
28.4 C (83.1 F)
2024
29.3 C (84.7 F)
2025
27.9 C (82.2 F)
Coldest night (TNn)
The coldest night of the year at Hezuo, 1957 to 2025. The record is -33.0 C (-27.4 F) in 1957, marked on the chart; the median year is -24.3 C (-11.7 F).
Coldest night (TNn) at Hezuo by year
Year
Coldest night (TNn)
1957
-33.0 C (-27.4 F)
1958
-25.5 C (-13.9 F)
1959
-24.8 C (-12.6 F)
1960
-24.2 C (-11.6 F)
1961
-27.2 C (-17.0 F)
1962
-26.2 C (-15.2 F)
1963
-27.1 C (-16.8 F)
1964
-28.5 C (-19.3 F)
1965
-26.9 C (-16.4 F)
1966
-23.3 C (-9.9 F)
1967
-26.3 C (-15.3 F)
1968
-22.1 C (-7.8 F)
1969
-26.4 C (-15.5 F)
1970
-26.9 C (-16.4 F)
1971
-27.0 C (-16.6 F)
1972
-24.3 C (-11.7 F)
1973
-24.4 C (-11.9 F)
1974
-24.1 C (-11.4 F)
1975
-27.7 C (-17.9 F)
1976
-24.3 C (-11.7 F)
1977
-26.4 C (-15.5 F)
1978
-24.4 C (-11.9 F)
1979
-24.3 C (-11.7 F)
1980
-24.2 C (-11.6 F)
1981
-25.8 C (-14.4 F)
1982
-24.9 C (-12.8 F)
1983
-25.6 C (-14.1 F)
1984
-24.5 C (-12.1 F)
1985
-23.9 C (-11.0 F)
1986
-23.8 C (-10.8 F)
1987
-23.1 C (-9.6 F)
1988
-26.5 C (-15.7 F)
1989
-25.6 C (-14.1 F)
1990
-24.9 C (-12.8 F)
1991
-27.9 C (-18.2 F)
1992
-23.9 C (-11.0 F)
1993
-27.8 C (-18.0 F)
1994
-26.2 C (-15.2 F)
1995
-26.3 C (-15.3 F)
1996
-21.4 C (-6.5 F)
1997
-22.3 C (-8.1 F)
1998
-21.4 C (-6.5 F)
1999
-22.2 C (-8.0 F)
2000
-23.4 C (-10.1 F)
2001
-23.3 C (-9.9 F)
2002
-22.8 C (-9.0 F)
2003
-23.0 C (-9.4 F)
2004
-22.9 C (-9.2 F)
2005
-22.2 C (-8.0 F)
2006
-21.7 C (-7.1 F)
2007
-21.8 C (-7.2 F)
2008
-27.1 C (-16.8 F)
2009
-23.7 C (-10.7 F)
2010
-24.4 C (-11.9 F)
2011
-26.8 C (-16.2 F)
2012
-24.7 C (-12.5 F)
2013
-23.1 C (-9.6 F)
2014
-21.4 C (-6.5 F)
2015
-22.7 C (-8.9 F)
2016
-26.7 C (-16.1 F)
2017
-21.5 C (-6.7 F)
2018
-25.6 C (-14.1 F)
2019
-23.3 C (-9.9 F)
2020
-21.6 C (-6.9 F)
2021
-22.5 C (-8.5 F)
2022
-24.2 C (-11.6 F)
2023
-23.8 C (-10.8 F)
2024
-22.7 C (-8.9 F)
2025
-24.9 C (-12.8 F)
Wettest day (Rx1day)
The wettest day of the year at Hezuo, 1957 to 2025. The record is 83.7 mm (3.3 in) in 1996, marked on the chart; the median year is 31.6 mm (1.2 in).
Wettest day (Rx1day) at Hezuo by year
Year
Wettest day (Rx1day)
1957
20.0 mm (0.8 in)
1958
34.6 mm (1.4 in)
1959
39.8 mm (1.6 in)
1960
27.9 mm (1.1 in)
1961
30.3 mm (1.2 in)
1962
28.3 mm (1.1 in)
1963
32.9 mm (1.3 in)
1964
57.1 mm (2.2 in)
1965
40.6 mm (1.6 in)
1966
20.8 mm (0.8 in)
1967
64.4 mm (2.5 in)
1968
38.0 mm (1.5 in)
1969
19.1 mm (0.8 in)
1970
32.1 mm (1.3 in)
1971
26.0 mm (1.0 in)
1972
31.6 mm (1.2 in)
1973
31.6 mm (1.2 in)
1974
16.1 mm (0.6 in)
1975
26.8 mm (1.1 in)
1976
36.9 mm (1.5 in)
1977
41.1 mm (1.6 in)
1978
31.4 mm (1.2 in)
1979
30.4 mm (1.2 in)
1980
21.2 mm (0.8 in)
1981
48.3 mm (1.9 in)
1982
26.3 mm (1.0 in)
1983
32.2 mm (1.3 in)
1984
41.2 mm (1.6 in)
1985
31.2 mm (1.2 in)
1986
32.6 mm (1.3 in)
1987
30.0 mm (1.2 in)
1988
39.9 mm (1.6 in)
1989
31.4 mm (1.2 in)
1990
29.4 mm (1.2 in)
1991
22.5 mm (0.9 in)
1992
47.0 mm (1.9 in)
1993
22.2 mm (0.9 in)
1994
31.7 mm (1.2 in)
1995
32.8 mm (1.3 in)
1996
83.7 mm (3.3 in)
1997
27.5 mm (1.1 in)
1998
26.3 mm (1.0 in)
1999
47.3 mm (1.9 in)
2000
18.2 mm (0.7 in)
2001
21.7 mm (0.9 in)
2002
21.4 mm (0.8 in)
2003
38.6 mm (1.5 in)
2004
33.9 mm (1.3 in)
2005
36.5 mm (1.4 in)
2006
42.6 mm (1.7 in)
2007
25.2 mm (1.0 in)
2008
21.9 mm (0.9 in)
2009
30.7 mm (1.2 in)
2010
27.4 mm (1.1 in)
2011
41.7 mm (1.6 in)
2012
47.3 mm (1.9 in)
2013
31.5 mm (1.2 in)
2014
40.1 mm (1.6 in)
2015
30.2 mm (1.2 in)
2016
65.0 mm (2.6 in)
2017
24.9 mm (1.0 in)
2018
46.7 mm (1.8 in)
2019
59.9 mm (2.4 in)
2020
24.1 mm (0.9 in)
2021
41.4 mm (1.6 in)
2022
20.1 mm (0.8 in)
2023
39.1 mm (1.5 in)
2024
47.5 mm (1.9 in)
2025
47.2 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hezuo, 1957 to 2025. The record is 130.2 mm (5.1 in) in 2018, marked on the chart; the median year is 56.9 mm (2.2 in).
Wettest five days (Rx5day) at Hezuo by year
Year
Wettest five days (Rx5day)
1957
31.0 mm (1.2 in)
1958
54.1 mm (2.1 in)
1959
62.9 mm (2.5 in)
1960
66.5 mm (2.6 in)
1961
47.2 mm (1.9 in)
1962
67.4 mm (2.7 in)
1963
50.4 mm (2.0 in)
1964
88.1 mm (3.5 in)
1965
52.4 mm (2.1 in)
1966
56.9 mm (2.2 in)
1967
79.7 mm (3.1 in)
1968
92.5 mm (3.6 in)
1969
37.7 mm (1.5 in)
1970
48.9 mm (1.9 in)
1971
48.6 mm (1.9 in)
1972
43.9 mm (1.7 in)
1973
72.7 mm (2.9 in)
1974
36.5 mm (1.4 in)
1975
76.4 mm (3.0 in)
1976
78.7 mm (3.1 in)
1977
71.5 mm (2.8 in)
1978
86.9 mm (3.4 in)
1979
58.8 mm (2.3 in)
1980
28.8 mm (1.1 in)
1981
68.3 mm (2.7 in)
1982
58.0 mm (2.3 in)
1983
48.0 mm (1.9 in)
1984
80.5 mm (3.2 in)
1985
53.3 mm (2.1 in)
1986
47.5 mm (1.9 in)
1987
41.2 mm (1.6 in)
1988
56.8 mm (2.2 in)
1989
72.5 mm (2.9 in)
1990
61.2 mm (2.4 in)
1991
34.1 mm (1.3 in)
1992
77.0 mm (3.0 in)
1993
36.3 mm (1.4 in)
1994
50.7 mm (2.0 in)
1995
49.7 mm (2.0 in)
1996
97.5 mm (3.8 in)
1997
66.8 mm (2.6 in)
1998
45.9 mm (1.8 in)
1999
80.0 mm (3.1 in)
2000
52.2 mm (2.1 in)
2001
55.3 mm (2.2 in)
2002
58.5 mm (2.3 in)
2003
72.9 mm (2.9 in)
2004
51.5 mm (2.0 in)
2005
68.0 mm (2.7 in)
2006
56.0 mm (2.2 in)
2007
66.0 mm (2.6 in)
2008
45.6 mm (1.8 in)
2009
45.2 mm (1.8 in)
2010
52.0 mm (2.0 in)
2011
75.9 mm (3.0 in)
2012
80.5 mm (3.2 in)
2013
60.5 mm (2.4 in)
2014
53.2 mm (2.1 in)
2015
37.3 mm (1.5 in)
2016
92.1 mm (3.6 in)
2017
51.8 mm (2.0 in)
2018
130.2 mm (5.1 in)
2019
70.3 mm (2.8 in)
2020
60.9 mm (2.4 in)
2021
58.9 mm (2.3 in)
2022
42.0 mm (1.7 in)
2023
39.1 mm (1.5 in)
2024
78.6 mm (3.1 in)
2025
52.0 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hezuo, 1957 to 2025. The record is 93 days in 1962, marked on the chart; the median year is 45 days.
Longest dry spell (CDD) at Hezuo by year
Year
Longest dry spell (CDD)
1957
46 days
1958
33 days
1959
31 days
1960
32 days
1961
61 days
1962
93 days
1963
69 days
1964
67 days
1965
36 days
1966
48 days
1967
45 days
1968
54 days
1969
51 days
1970
68 days
1971
54 days
1972
37 days
1973
58 days
1974
27 days
1975
60 days
1976
77 days
1977
36 days
1978
53 days
1979
58 days
1980
47 days
1981
36 days
1982
39 days
1983
54 days
1984
51 days
1985
55 days
1986
46 days
1987
60 days
1988
51 days
1989
46 days
1990
36 days
1991
30 days
1992
59 days
1993
41 days
1994
22 days
1995
43 days
1996
54 days
1997
49 days
1998
64 days
1999
74 days
2000
48 days
2001
41 days
2002
47 days
2003
28 days
2004
31 days
2005
44 days
2006
79 days
2007
69 days
2008
39 days
2009
56 days
2010
60 days
2011
45 days
2012
36 days
2013
5 days
2014
6 days
2015
4 days
2016
5 days
2017
3 days
2018
4 days
2019
15 days
2020
38 days
2021
41 days
2022
34 days
2023
13 days
2024
11 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
58 years with a frost
Across 58 years with a frost, the median last spring frost at Hezuo falls on 31 May and the median first autumn frost on 16 September, which leaves a median of 106 days between them.
Fitted over all years, the growing season changes by +8.8 days per decade at this station.
Frost dates and growing season at Hezuo
Measure
Median, all years
Earliest period
Recent period (1985 to 2021)
Recent against earliest
Fitted trend
Last spring frost
31 May
n/a
27 May
n/a
-3.2 days per decade
First autumn frost
16 September
n/a
19 September
n/a
+5.6 days per decade
Growing days
106 days
n/a
114 days
n/a
+8.8 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, 1957 to 2021
A day with at least 31.1 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 72.5 mm (2.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Hezuo: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
31.1 mm (1.2 in)
5 years
40.9 mm (1.6 in)
10 years
47.9 mm (1.9 in)
25 years
57.3 mm (2.3 in)
50 years
64.8 mm (2.6 in)
100 years
72.5 mm (2.9 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 1957 to 2021.
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: 83.7 mm (3.3 in) in 1996; 64.4 mm (2.5 in) in 1967; 57.1 mm (2.2 in) in 1964.
Download the Data
Data for Hezuo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hezuo 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.