Record envelope, standing records and threshold days for Dulan (CHM00052836), China, with 72 years of record.
Key Facts for Dulan
Dulan (CHM00052836) is a weather station in China at 36.30 latitude and 98.10 longitude, 3,192 m (10,472 ft) above sea level.
The station reports from 1954 to 2025, 72 years of record.
1,464 records set at Dulan still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Dulan set a daily record high maximum temperature of 27.3 C (81.1 F) on 19 August 2025.
About the Station
Location: China, 36.30 latitude, 98.10 longitude.
Elevation: 3,192 m (10,472 ft).
Period of record: 1954 to 2025, 72 years.
Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
16 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 Dulan. The lines show the 2026 daily maximum and minimum. 16 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Dulan, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.3 C (54.1 F)
-29.8 C (-21.6 F)
8.6 C (47.5 F)
-21.9 C (-7.4 F)
Feb
15.9 C (60.6 F)
-23.5 C (-10.3 F)
8.9 C (48.0 F)
-18.2 C (-0.8 F)
Mar
20.0 C (68.0 F)
-19.6 C (-3.3 F)
15.9 C (60.6 F)
-14.4 C (6.1 F)
Apr
27.1 C (80.8 F)
-13.8 C (7.2 F)
22.5 C (72.5 F)
-7.1 C (19.2 F)
May
28.0 C (82.4 F)
-7.6 C (18.3 F)
24.1 C (75.4 F)
-4.3 C (24.3 F)
Jun
31.9 C (89.4 F)
-4.3 C (24.3 F)
25.2 C (77.4 F)
2.8 C (37.0 F)
Jul
31.8 C (89.2 F)
0.1 C (32.2 F)
30.6 C (87.1 F)
4.5 C (40.1 F)
Aug
32.2 C (90.0 F)
-0.9 C (30.4 F)
28.9 C (84.0 F)
5.6 C (42.1 F)
Sep
30.3 C (86.5 F)
-4.8 C (23.4 F)
n/a
n/a
Oct
23.4 C (74.1 F)
-18.2 C (-0.8 F)
n/a
n/a
Nov
17.1 C (62.8 F)
-22.6 C (-8.7 F)
n/a
n/a
Dec
11.5 C (52.7 F)
-27.0 C (-16.6 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Dulan still stand. 1956 holds the most, with 44.
Standing records at Dulan by the year they were set
Year set
Standing records
1954
37
1955
25
1956
44
1957
31
1958
13
1959
28
1960
16
1961
23
1962
26
1963
18
1964
15
1965
13
1966
18
1967
27
1968
20
1969
32
1970
25
1971
17
1972
20
1973
19
1974
23
1975
18
1976
19
1977
19
1978
30
1979
23
1980
11
1981
16
1982
21
1983
18
1984
17
1985
13
1986
19
1987
30
1988
17
1989
20
1990
20
1991
30
1992
18
1993
26
1994
16
1995
15
1996
10
1997
11
1998
34
1999
21
2000
34
2001
19
2002
26
2003
21
2004
24
2005
3
2006
36
2007
17
2008
27
2009
21
2010
22
2011
24
2012
11
2013
16
2014
23
2015
16
2016
5
2017
4
2018
8
2019
8
2020
15
2021
17
2022
35
2023
11
2024
20
2025
19
All-Time Record Progression
7 new records
7 all-time records were set at Dulan between 17 July 1999 and 15 December 2018. Each dot is a new record.
When Dulan set new all-time records
Date
Kind
Detail
1999-07-17
Record daily precipitation
Record daily precipitation 34.3 mm (1.4 in)
1999-08-01
Record high maximum temperature
Record high maximum temperature 32.2 C (90.0 F)
2000-07-23
Record high minimum temperature
Record high minimum temperature 19.3 C (66.7 F)
2009-07-07
Record daily precipitation
Record daily precipitation 42.5 mm (1.7 in)
2010-06-07
Record daily precipitation
Record daily precipitation 43.5 mm (1.7 in)
2017-03-02
Record daily precipitation
Record daily precipitation 50.0 mm (2.0 in)
2018-12-15
Record daily precipitation
Record daily precipitation 89.9 mm (3.5 in)
Wettest Day of Each Month
Dec: 89.9 mm (3.5 in)
The wettest day on record for each calendar month at Dulan. The most was 89.9 mm (3.5 in) on 15 December 2018.
Record daily precipitation for each month at Dulan
Month
Record daily precipitation (mm)
Date
Jan
59.9 mm (2.4 in)
21 January 2019
Feb
39.9 mm (1.6 in)
11 February 2022
Mar
50.0 mm (2.0 in)
2 March 2017
Apr
27.4 mm (1.1 in)
25 April 2004
May
54.6 mm (2.1 in)
26 May 2022
Jun
43.5 mm (1.7 in)
7 June 2010
Jul
55.1 mm (2.2 in)
25 July 2021
Aug
28.4 mm (1.1 in)
5 August 1981
Sep
23.2 mm (0.9 in)
3 September 1989
Oct
18.5 mm (0.7 in)
5 October 2023
Nov
39.9 mm (1.6 in)
27 November 2016
Dec
89.9 mm (3.5 in)
15 December 2018
Period of Record Coverage
1954 to 2025
Complete yearUnder 90 percent of days
72 years of record at Dulan, 1954 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 60 complete years at Dulan, 1955 to 2021. Blue stripes are years cooler than the station's own mean of 3.8 C (38.9 F); red stripes are warmer. The coolest year was 1967, at 2.4 C (36.3 F), and the warmest was 1998, at 5.4 C (41.8 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Dulan as warming stripes, 1955 to 2021
Year
Annual mean temperature
Difference from the station mean
1955
2.8 C
-1.07 C
1956
2.4 C
-1.39 C
1957
2.8 C
-1.01 C
1958
3.9 C
+0.08 C
1959
3.5 C
-0.33 C
1960
3.7 C
-0.15 C
1961
3.2 C
-0.67 C
1962
3.0 C
-0.82 C
1963
3.4 C
-0.39 C
1964
3.4 C
-0.40 C
1965
3.4 C
-0.41 C
1966
3.6 C
-0.25 C
1967
2.4 C
-1.41 C
1968
3.3 C
-0.52 C
1969
3.8 C
-0.05 C
1970
2.7 C
-1.16 C
1971
3.6 C
-0.24 C
1972
4.3 C
+0.51 C
1973
3.9 C
+0.03 C
1974
3.5 C
-0.37 C
1975
3.4 C
-0.42 C
1976
3.1 C
-0.71 C
1977
3.0 C
-0.85 C
1978
3.7 C
-0.11 C
1979
3.6 C
-0.25 C
1980
3.8 C
+0.01 C
1981
4.1 C
+0.29 C
1982
3.6 C
-0.26 C
1983
2.6 C
-1.21 C
1984
3.3 C
-0.52 C
1985
3.8 C
-0.07 C
1986
3.5 C
-0.35 C
1987
4.4 C
+0.61 C
1988
4.2 C
+0.42 C
1989
3.4 C
-0.38 C
1990
4.3 C
+0.45 C
1991
4.2 C
+0.40 C
1992
3.6 C
-0.19 C
1993
4.0 C
+0.18 C
1994
4.5 C
+0.64 C
1995
3.7 C
-0.16 C
1996
4.3 C
+0.52 C
1997
4.3 C
+0.44 C
1998
5.4 C
+1.62 C
1999
5.0 C
+1.22 C
2000
4.1 C
+0.32 C
2001
4.8 C
+0.96 C
2002
4.7 C
+0.85 C
2003
5.0 C
+1.13 C
2004
4.7 C
+0.88 C
2005
3.8 C
-0.02 C
2006
4.9 C
+1.07 C
2007
4.3 C
+0.45 C
2008
3.7 C
-0.09 C
2009
4.7 C
+0.86 C
2010
4.7 C
+0.86 C
2011
4.3 C
+0.47 C
2012
3.5 C
-0.35 C
2020
4.5 C
+0.63 C
2021
4.3 C
+0.44 C
The annual mean temperature here has risen by 0.3 C (0.2 to 0.3) per decade over 1955 to 2021. In Fahrenheit: 0.5 F (0.3 to 0.6) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Dulan
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.2 to 0.3) per decade
0.5 F (0.3 to 0.6) per decade
1955 to 2021
60
Rise
Mean daily maximum
0.3 C (0.2 to 0.4) per decade
0.6 F (0.4 to 0.7) per decade
1955 to 2021
60
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.5) per decade
1955 to 2021
60
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
1954 to 2025
Yearly extremes at Dulan: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
32.2 C (90.0 F)
1999
29.0 C (84.2 F)
72
Coldest night (TNn)
-29.8 C (-21.6 F)
1956
-22.1 C (-7.8 F)
72
Wettest day (Rx1day)
89.9 mm (3.5 in)
2018
20.4 mm (0.8 in)
72
Wettest five days (Rx5day)
239.7 mm (9.4 in)
2019
30.3 mm (1.2 in)
72
Longest dry spell (CDD)
135 days
1984
48 days
72
Hottest day (TXx)
The hottest day of the year at Dulan, 1954 to 2025. The record is 32.2 C (90.0 F) in 1999, marked on the chart; the median year is 29.0 C (84.2 F).
Hottest day (TXx) at Dulan by year
Year
Hottest day (TXx)
1954
29.8 C (85.6 F)
1955
28.9 C (84.0 F)
1956
26.7 C (80.1 F)
1957
27.8 C (82.0 F)
1958
29.9 C (85.8 F)
1959
29.0 C (84.2 F)
1960
29.8 C (85.6 F)
1961
31.9 C (89.4 F)
1962
29.5 C (85.1 F)
1963
27.7 C (81.9 F)
1964
27.8 C (82.0 F)
1965
28.2 C (82.8 F)
1966
28.3 C (82.9 F)
1967
29.4 C (84.9 F)
1968
28.7 C (83.7 F)
1969
28.7 C (83.7 F)
1970
27.9 C (82.2 F)
1971
28.9 C (84.0 F)
1972
28.7 C (83.7 F)
1973
30.0 C (86.0 F)
1974
26.6 C (79.9 F)
1975
28.6 C (83.5 F)
1976
25.7 C (78.3 F)
1977
28.7 C (83.7 F)
1978
30.1 C (86.2 F)
1979
28.3 C (82.9 F)
1980
28.6 C (83.5 F)
1981
30.9 C (87.6 F)
1982
28.3 C (82.9 F)
1983
27.7 C (81.9 F)
1984
26.0 C (78.8 F)
1985
30.2 C (86.4 F)
1986
30.9 C (87.6 F)
1987
27.6 C (81.7 F)
1988
30.4 C (86.7 F)
1989
29.2 C (84.6 F)
1990
28.0 C (82.4 F)
1991
31.5 C (88.7 F)
1992
28.4 C (83.1 F)
1993
30.8 C (87.4 F)
1994
29.2 C (84.6 F)
1995
30.3 C (86.5 F)
1996
28.6 C (83.5 F)
1997
31.4 C (88.5 F)
1998
29.0 C (84.2 F)
1999
32.2 C (90.0 F)
2000
31.8 C (89.2 F)
2001
31.7 C (89.1 F)
2002
29.0 C (84.2 F)
2003
29.6 C (85.3 F)
2004
30.4 C (86.7 F)
2005
28.6 C (83.5 F)
2006
29.1 C (84.4 F)
2007
27.5 C (81.5 F)
2008
26.9 C (80.4 F)
2009
29.0 C (84.2 F)
2010
30.8 C (87.4 F)
2011
29.2 C (84.6 F)
2012
28.0 C (82.4 F)
2013
29.0 C (84.2 F)
2014
28.5 C (83.3 F)
2015
28.8 C (83.8 F)
2016
21.2 C (70.2 F)
2017
22.0 C (71.6 F)
2018
30.2 C (86.4 F)
2019
16.0 C (60.8 F)
2020
27.9 C (82.2 F)
2021
31.3 C (88.3 F)
2022
31.2 C (88.2 F)
2023
29.6 C (85.3 F)
2024
31.3 C (88.3 F)
2025
30.6 C (87.1 F)
Coldest night (TNn)
The coldest night of the year at Dulan, 1954 to 2025. The record is -29.8 C (-21.6 F) in 1956, marked on the chart; the median year is -22.1 C (-7.8 F).
Coldest night (TNn) at Dulan by year
Year
Coldest night (TNn)
1954
-25.0 C (-13.0 F)
1955
-26.1 C (-15.0 F)
1956
-29.8 C (-21.6 F)
1957
-20.6 C (-5.1 F)
1958
-20.9 C (-5.6 F)
1959
-24.6 C (-12.3 F)
1960
-21.6 C (-6.9 F)
1961
-23.2 C (-9.8 F)
1962
-23.8 C (-10.8 F)
1963
-23.1 C (-9.6 F)
1964
-23.6 C (-10.5 F)
1965
-23.3 C (-9.9 F)
1966
-21.7 C (-7.1 F)
1967
-22.5 C (-8.5 F)
1968
-21.3 C (-6.3 F)
1969
-22.0 C (-7.6 F)
1970
-25.0 C (-13.0 F)
1971
-24.2 C (-11.6 F)
1972
-22.6 C (-8.7 F)
1973
-21.2 C (-6.2 F)
1974
-23.6 C (-10.5 F)
1975
-24.3 C (-11.7 F)
1976
-18.6 C (-1.5 F)
1977
-23.6 C (-10.5 F)
1978
-23.5 C (-10.3 F)
1979
-22.4 C (-8.3 F)
1980
-20.2 C (-4.4 F)
1981
-21.0 C (-5.8 F)
1982
-25.7 C (-14.3 F)
1983
-24.1 C (-11.4 F)
1984
-22.3 C (-8.1 F)
1985
-20.7 C (-5.3 F)
1986
-20.9 C (-5.6 F)
1987
-18.6 C (-1.5 F)
1988
-23.1 C (-9.6 F)
1989
-26.4 C (-15.5 F)
1990
-20.5 C (-4.9 F)
1991
-24.1 C (-11.4 F)
1992
-21.0 C (-5.8 F)
1993
-23.4 C (-10.1 F)
1994
-20.1 C (-4.2 F)
1995
-25.1 C (-13.2 F)
1996
-21.4 C (-6.5 F)
1997
-18.6 C (-1.5 F)
1998
-20.9 C (-5.6 F)
1999
-21.2 C (-6.2 F)
2000
-21.2 C (-6.2 F)
2001
-19.0 C (-2.2 F)
2002
-24.1 C (-11.4 F)
2003
-18.1 C (-0.6 F)
2004
-22.2 C (-8.0 F)
2005
-19.2 C (-2.6 F)
2006
-18.7 C (-1.7 F)
2007
-21.9 C (-7.4 F)
2008
-25.7 C (-14.3 F)
2009
-22.0 C (-7.6 F)
2010
-23.4 C (-10.1 F)
2011
-24.7 C (-12.5 F)
2012
-27.0 C (-16.6 F)
2013
-20.9 C (-5.6 F)
2014
-20.8 C (-5.4 F)
2015
-20.5 C (-4.9 F)
2016
-25.5 C (-13.9 F)
2017
-20.2 C (-4.4 F)
2018
-22.3 C (-8.1 F)
2019
-21.5 C (-6.7 F)
2020
-19.6 C (-3.3 F)
2021
-23.6 C (-10.5 F)
2022
-20.1 C (-4.2 F)
2023
-23.4 C (-10.1 F)
2024
-20.3 C (-4.5 F)
2025
-21.9 C (-7.4 F)
Wettest day (Rx1day)
The wettest day of the year at Dulan, 1954 to 2025. The record is 89.9 mm (3.5 in) in 2018, marked on the chart; the median year is 20.4 mm (0.8 in).
Wettest day (Rx1day) at Dulan by year
Year
Wettest day (Rx1day)
1954
18.7 mm (0.7 in)
1955
18.1 mm (0.7 in)
1956
24.2 mm (1.0 in)
1957
10.5 mm (0.4 in)
1958
18.7 mm (0.7 in)
1959
24.9 mm (1.0 in)
1960
16.2 mm (0.6 in)
1961
19.1 mm (0.8 in)
1962
12.4 mm (0.5 in)
1963
19.9 mm (0.8 in)
1964
18.5 mm (0.7 in)
1965
11.5 mm (0.5 in)
1966
17.8 mm (0.7 in)
1967
15.5 mm (0.6 in)
1968
8.4 mm (0.33 in)
1969
28.4 mm (1.1 in)
1970
20.3 mm (0.8 in)
1971
31.4 mm (1.2 in)
1972
20.6 mm (0.8 in)
1973
26.0 mm (1.0 in)
1974
16.1 mm (0.6 in)
1975
22.5 mm (0.9 in)
1976
23.6 mm (0.9 in)
1977
16.7 mm (0.7 in)
1978
17.4 mm (0.7 in)
1979
15.7 mm (0.6 in)
1980
14.0 mm (0.6 in)
1981
28.4 mm (1.1 in)
1982
21.0 mm (0.8 in)
1983
14.8 mm (0.6 in)
1984
15.5 mm (0.6 in)
1985
14.9 mm (0.6 in)
1986
20.5 mm (0.8 in)
1987
18.0 mm (0.7 in)
1988
23.7 mm (0.9 in)
1989
23.2 mm (0.9 in)
1990
27.5 mm (1.1 in)
1991
19.0 mm (0.7 in)
1992
16.9 mm (0.7 in)
1993
17.0 mm (0.7 in)
1994
23.7 mm (0.9 in)
1995
25.4 mm (1.0 in)
1996
16.9 mm (0.7 in)
1997
19.3 mm (0.8 in)
1998
18.7 mm (0.7 in)
1999
34.3 mm (1.4 in)
2000
23.4 mm (0.9 in)
2001
21.6 mm (0.9 in)
2002
20.7 mm (0.8 in)
2003
10.5 mm (0.4 in)
2004
27.4 mm (1.1 in)
2005
21.5 mm (0.8 in)
2006
22.6 mm (0.9 in)
2007
18.9 mm (0.7 in)
2008
15.2 mm (0.6 in)
2009
42.5 mm (1.7 in)
2010
43.5 mm (1.7 in)
2011
27.7 mm (1.1 in)
2012
25.8 mm (1.0 in)
2013
17.5 mm (0.7 in)
2014
25.9 mm (1.0 in)
2015
32.0 mm (1.3 in)
2016
39.9 mm (1.6 in)
2017
50.0 mm (2.0 in)
2018
89.9 mm (3.5 in)
2019
59.9 mm (2.4 in)
2020
20.1 mm (0.8 in)
2021
55.1 mm (2.2 in)
2022
54.6 mm (2.1 in)
2023
18.5 mm (0.7 in)
2024
27.2 mm (1.1 in)
2025
20.1 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Dulan, 1954 to 2025. The record is 239.7 mm (9.4 in) in 2019, marked on the chart; the median year is 30.3 mm (1.2 in).
Wettest five days (Rx5day) at Dulan by year
Year
Wettest five days (Rx5day)
1954
23.2 mm (0.9 in)
1955
27.4 mm (1.1 in)
1956
27.6 mm (1.1 in)
1957
22.6 mm (0.9 in)
1958
33.3 mm (1.3 in)
1959
51.7 mm (2.0 in)
1960
27.6 mm (1.1 in)
1961
28.6 mm (1.1 in)
1962
28.8 mm (1.1 in)
1963
24.7 mm (1.0 in)
1964
26.7 mm (1.1 in)
1965
24.1 mm (0.9 in)
1966
22.9 mm (0.9 in)
1967
32.0 mm (1.3 in)
1968
9.8 mm (0.39 in)
1969
32.4 mm (1.3 in)
1970
33.7 mm (1.3 in)
1971
49.5 mm (1.9 in)
1972
22.9 mm (0.9 in)
1973
28.1 mm (1.1 in)
1974
22.7 mm (0.9 in)
1975
29.4 mm (1.2 in)
1976
37.9 mm (1.5 in)
1977
24.5 mm (1.0 in)
1978
27.9 mm (1.1 in)
1979
30.2 mm (1.2 in)
1980
27.8 mm (1.1 in)
1981
28.4 mm (1.1 in)
1982
32.9 mm (1.3 in)
1983
22.8 mm (0.9 in)
1984
22.3 mm (0.9 in)
1985
26.0 mm (1.0 in)
1986
31.3 mm (1.2 in)
1987
29.3 mm (1.2 in)
1988
28.4 mm (1.1 in)
1989
38.3 mm (1.5 in)
1990
29.1 mm (1.1 in)
1991
42.5 mm (1.7 in)
1992
30.3 mm (1.2 in)
1993
19.5 mm (0.8 in)
1994
29.0 mm (1.1 in)
1995
56.9 mm (2.2 in)
1996
20.1 mm (0.8 in)
1997
36.0 mm (1.4 in)
1998
25.8 mm (1.0 in)
1999
58.3 mm (2.3 in)
2000
37.6 mm (1.5 in)
2001
21.6 mm (0.9 in)
2002
46.0 mm (1.8 in)
2003
20.2 mm (0.8 in)
2004
41.3 mm (1.6 in)
2005
46.2 mm (1.8 in)
2006
54.0 mm (2.1 in)
2007
55.5 mm (2.2 in)
2008
29.6 mm (1.2 in)
2009
56.5 mm (2.2 in)
2010
53.1 mm (2.1 in)
2011
33.7 mm (1.3 in)
2012
44.8 mm (1.8 in)
2013
19.6 mm (0.8 in)
2014
36.4 mm (1.4 in)
2015
51.8 mm (2.0 in)
2016
70.2 mm (2.8 in)
2017
60.0 mm (2.4 in)
2018
50.7 mm (2.0 in)
2019
239.7 mm (9.4 in)
2020
31.3 mm (1.2 in)
2021
71.1 mm (2.8 in)
2022
130.7 mm (5.1 in)
2023
26.9 mm (1.1 in)
2024
48.6 mm (1.9 in)
2025
43.7 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Dulan, 1954 to 2025. The record is 135 days in 1984, marked on the chart; the median year is 48 days.
Longest dry spell (CDD) at Dulan by year
Year
Longest dry spell (CDD)
1954
70 days
1955
43 days
1956
40 days
1957
32 days
1958
61 days
1959
51 days
1960
38 days
1961
48 days
1962
81 days
1963
48 days
1964
91 days
1965
121 days
1966
49 days
1967
36 days
1968
59 days
1969
45 days
1970
82 days
1971
41 days
1972
85 days
1973
74 days
1974
62 days
1975
46 days
1976
45 days
1977
65 days
1978
37 days
1979
62 days
1980
53 days
1981
47 days
1982
47 days
1983
73 days
1984
135 days
1985
51 days
1986
46 days
1987
46 days
1988
40 days
1989
70 days
1990
39 days
1991
100 days
1992
33 days
1993
84 days
1994
60 days
1995
54 days
1996
58 days
1997
49 days
1998
68 days
1999
48 days
2000
43 days
2001
55 days
2002
43 days
2003
39 days
2004
44 days
2005
50 days
2006
69 days
2007
54 days
2008
53 days
2009
32 days
2010
59 days
2011
55 days
2012
53 days
2013
4 days
2014
3 days
2015
5 days
2016
7 days
2017
3 days
2018
3 days
2019
5 days
2020
50 days
2021
31 days
2022
37 days
2023
12 days
2024
20 days
2025
25 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
60 years with a frost
Across 60 years with a frost, the median last spring frost at Dulan falls on 21 May and the median first autumn frost on 21 September, which leaves a median of 119 days between them.
In 1985 to 2021 the median growing season was 120 days. That is 1 day more than in 1955 to 1984.
Fitted over all years, the growing season changes by +2.5 days per decade at this station.
Frost dates and growing season at Dulan
Measure
Median, all years
Earliest period (1955 to 1984)
Recent period (1985 to 2021)
Recent against earliest
Fitted trend
Last spring frost
21 May
24 May
21 May
3 days earlier
-1.3 days per decade
First autumn frost
21 September
20 September
22 September
2 days later
+1.2 days per decade
Growing days
119 days
119 days
120 days
1 day more
+2.5 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
61 years, 1954 to 2021
A day with at least 19.7 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 48.4 mm (1.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Dulan: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
19.7 mm (0.8 in)
5 years
26.1 mm (1.0 in)
10 years
30.9 mm (1.2 in)
25 years
37.4 mm (1.5 in)
50 years
42.7 mm (1.7 in)
100 years
48.4 mm (1.9 in)
Longer than the 61 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, 61 years of values from 1954 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: 55.1 mm (2.2 in) in 2021; 43.5 mm (1.7 in) in 2010; 42.5 mm (1.7 in) in 2009.
Download the Data
Data for Dulan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Dulan 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.