Record envelope, standing records and threshold days for Dunn 4 NW (USC00312500), North Carolina, United States, with 65 years of record.
Key Facts for Dunn 4 NW
Dunn 4 NW (USC00312500) is a weather station in North Carolina, United States at 35.32 latitude and -78.69 longitude, 61 m (200 ft) above sea level.
The station reports from 1962 to 2026, 65 years of record.
1,464 records set at Dunn 4 NW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Dunn 4 NW set a daily record high minimum temperature of 21.7 C (71.1 F) on 21 May 2025.
About the Station
Location: North Carolina, United States, 35.32 latitude, -78.69 longitude.
Elevation: 61 m (200 ft).
Period of record: 1962 to 2026, 65 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
3 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 Dunn 4 NW. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Dunn 4 NW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
26.7 C (80.1 F)
-20.0 C (-4.0 F)
23.3 C (73.9 F)
-10.0 C (14.0 F)
Feb
31.1 C (88.0 F)
-15.6 C (3.9 F)
26.1 C (79.0 F)
-6.7 C (19.9 F)
Mar
31.7 C (89.1 F)
-12.2 C (10.0 F)
27.2 C (81.0 F)
-3.9 C (25.0 F)
Apr
34.4 C (93.9 F)
-3.9 C (25.0 F)
31.1 C (88.0 F)
3.3 C (37.9 F)
May
37.2 C (99.0 F)
0.6 C (33.1 F)
31.7 C (89.1 F)
9.4 C (48.9 F)
Jun
40.0 C (104.0 F)
6.1 C (43.0 F)
32.8 C (91.0 F)
11.7 C (53.1 F)
Jul
40.6 C (105.1 F)
11.1 C (52.0 F)
n/a
n/a
Aug
42.2 C (108.0 F)
8.3 C (46.9 F)
n/a
n/a
Sep
37.8 C (100.0 F)
2.8 C (37.0 F)
n/a
n/a
Oct
35.6 C (96.1 F)
-6.1 C (21.0 F)
n/a
n/a
Nov
30.0 C (86.0 F)
-11.1 C (12.0 F)
n/a
n/a
Dec
26.7 C (80.1 F)
-17.2 C (1.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Dunn 4 NW still stand. 1976 holds the most, with 44.
Standing records at Dunn 4 NW by the year they were set
Year set
Standing records
1962
12
1963
35
1964
28
1965
23
1966
29
1967
36
1968
20
1969
11
1970
26
1971
14
1972
6
1973
26
1974
26
1975
16
1976
44
1977
34
1978
26
1979
23
1980
35
1981
18
1982
14
1983
38
1984
25
1985
28
1986
34
1987
17
1988
20
1989
31
1990
20
1991
23
1992
19
1993
21
1994
17
1995
14
1996
22
1997
27
1998
20
1999
25
2000
22
2001
22
2002
37
2003
13
2004
16
2005
20
2006
15
2007
33
2008
16
2009
9
2010
27
2011
31
2012
14
2013
16
2014
16
2015
32
2016
11
2017
27
2018
33
2019
30
2020
18
2021
24
2022
16
2023
23
2024
29
2025
11
All-Time Record Progression
4 new records
4 all-time records were set at Dunn 4 NW between 20 January 1994 and 16 September 1999. Each dot is a new record.
When Dunn 4 NW set new all-time records
Date
Kind
Detail
1994-01-20
Record low maximum temperature
Record low maximum temperature -7.8 C (18.0 F)
1996-09-06
Record daily precipitation
Record daily precipitation 165.1 mm (6.5 in)
1999-08-14
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
1999-09-16
Record daily precipitation
Record daily precipitation 188.0 mm (7.4 in)
Wettest Day of Each Month
Sep: 188.0 mm (7.4 in)
The wettest day on record for each calendar month at Dunn 4 NW. The most was 188.0 mm (7.4 in) on 16 September 1999.
Record daily precipitation for each month at Dunn 4 NW
Month
Record daily precipitation (mm)
Date
Jan
76.2 mm (3.0 in)
10 January 2014
Feb
90.2 mm (3.6 in)
6 February 2020
Mar
114.3 mm (4.5 in)
9 March 1998
Apr
94.2 mm (3.7 in)
24 April 2017
May
124.5 mm (4.9 in)
18 May 2024
Jun
166.9 mm (6.6 in)
7 June 2013
Jul
129.5 mm (5.1 in)
11 July 1970
Aug
131.3 mm (5.2 in)
15 August 2020
Sep
188.0 mm (7.4 in)
16 September 1999
Oct
153.9 mm (6.1 in)
4 October 1964
Nov
114.8 mm (4.5 in)
6 November 1963
Dec
127.0 mm (5.0 in)
23 December 1972
Period of Record Coverage
1962 to 2025
Complete yearUnder 90 percent of days
64 years of record at Dunn 4 NW, 1962 to 2025. 8 years have data for under 90 percent of days and are left out of rankings: 1962, 1971, 1972, 1981, 1982, 1984, 1988, 2025.
Cooler than the station meanWarmer than the station mean
One stripe for each of 55 complete years at Dunn 4 NW, 1963 to 2024. Blue stripes are years cooler than the station's own mean of 16.1 C (61.1 F); red stripes are warmer. The coolest year was 1976, at 14.5 C (58.0 F), and the warmest was 2024, at 17.9 C (64.2 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Dunn 4 NW as warming stripes, 1963 to 2024
Year
Annual mean temperature
Difference from the station mean
1963
15.7 C
-0.49 C
1964
16.3 C
+0.20 C
1965
16.3 C
+0.19 C
1966
15.3 C
-0.83 C
1967
15.4 C
-0.77 C
1969
15.2 C
-0.94 C
1970
15.9 C
-0.23 C
1973
15.7 C
-0.42 C
1974
16.6 C
+0.47 C
1976
14.5 C
-1.69 C
1977
15.7 C
-0.49 C
1978
15.8 C
-0.34 C
1979
16.0 C
-0.19 C
1980
15.7 C
-0.45 C
1982
16.4 C
+0.27 C
1983
15.7 C
-0.45 C
1985
16.2 C
+0.05 C
1986
16.6 C
+0.43 C
1987
15.6 C
-0.54 C
1989
15.4 C
-0.72 C
1990
17.0 C
+0.81 C
1991
16.3 C
+0.18 C
1992
15.0 C
-1.12 C
1993
15.1 C
-1.02 C
1994
15.3 C
-0.83 C
1995
15.2 C
-0.98 C
1996
15.1 C
-1.02 C
1997
15.3 C
-0.81 C
1998
16.8 C
+0.68 C
1999
16.3 C
+0.14 C
2000
15.4 C
-0.73 C
2001
16.0 C
-0.16 C
2002
16.4 C
+0.22 C
2003
15.6 C
-0.59 C
2004
16.0 C
-0.15 C
2005
16.1 C
-0.04 C
2006
16.1 C
-0.07 C
2007
16.7 C
+0.54 C
2008
16.2 C
+0.01 C
2009
16.0 C
-0.15 C
2010
16.1 C
-0.05 C
2011
17.1 C
+0.99 C
2012
17.0 C
+0.85 C
2013
15.9 C
-0.22 C
2014
15.7 C
-0.45 C
2015
16.9 C
+0.73 C
2016
17.1 C
+0.92 C
2017
17.6 C
+1.45 C
2018
17.1 C
+0.94 C
2019
17.8 C
+1.70 C
2020
17.4 C
+1.23 C
2021
16.7 C
+0.53 C
2022
16.8 C
+0.67 C
2023
17.1 C
+1.00 C
2024
17.9 C
+1.75 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1963 to 2024. In Fahrenheit: 0.4 F (0.3 to 0.6) 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 Dunn 4 NW
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 (0.3 to 0.6) per decade
1963 to 2024
55
Rise
Mean daily maximum
0.16 C (0.04 to 0.29) per decade
0.3 F (0.1 to 0.5) per decade
1963 to 2024
55
Rise
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.6 F (0.4 to 0.8) per decade
1963 to 2024
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
1962 to 2026
Yearly extremes at Dunn 4 NW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1983
36.7 C (98.1 F)
65
Coldest night (TNn)
-20.0 C (-4.0 F)
1985
-10.6 C (12.9 F)
65
Wettest day (Rx1day)
188.0 mm (7.4 in)
1999
80.0 mm (3.1 in)
65
Wettest five days (Rx5day)
357.6 mm (14.1 in)
2018
120.2 mm (4.7 in)
64
Longest dry spell (CDD)
39 days
2000
21 days
65
Hottest day (TXx)
The hottest day of the year at Dunn 4 NW, 1962 to 2026. The record is 42.2 C (108.0 F) in 1983, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Dunn 4 NW by year
Year
Hottest day (TXx)
1962
32.2 C (90.0 F)
1963
36.7 C (98.1 F)
1964
36.7 C (98.1 F)
1965
35.6 C (96.1 F)
1966
36.7 C (98.1 F)
1967
35.0 C (95.0 F)
1968
37.8 C (100.0 F)
1969
36.1 C (97.0 F)
1970
38.3 C (100.9 F)
1971
36.7 C (98.1 F)
1972
30.6 C (87.1 F)
1973
33.3 C (91.9 F)
1974
35.0 C (95.0 F)
1975
36.7 C (98.1 F)
1976
34.4 C (93.9 F)
1977
37.2 C (99.0 F)
1978
37.2 C (99.0 F)
1979
36.7 C (98.1 F)
1980
38.3 C (100.9 F)
1981
37.8 C (100.0 F)
1982
35.0 C (95.0 F)
1983
42.2 C (108.0 F)
1984
35.6 C (96.1 F)
1985
36.1 C (97.0 F)
1986
38.9 C (102.0 F)
1987
37.2 C (99.0 F)
1988
39.4 C (102.9 F)
1989
35.0 C (95.0 F)
1990
37.2 C (99.0 F)
1991
36.7 C (98.1 F)
1992
35.6 C (96.1 F)
1993
36.7 C (98.1 F)
1994
33.9 C (93.0 F)
1995
37.2 C (99.0 F)
1996
36.7 C (98.1 F)
1997
37.8 C (100.0 F)
1998
37.2 C (99.0 F)
1999
38.9 C (102.0 F)
2000
35.6 C (96.1 F)
2001
36.1 C (97.0 F)
2002
38.3 C (100.9 F)
2003
34.4 C (93.9 F)
2004
35.6 C (96.1 F)
2005
37.8 C (100.0 F)
2006
37.8 C (100.0 F)
2007
39.4 C (102.9 F)
2008
38.3 C (100.9 F)
2009
35.6 C (96.1 F)
2010
38.3 C (100.9 F)
2011
38.9 C (102.0 F)
2012
40.0 C (104.0 F)
2013
35.6 C (96.1 F)
2014
36.1 C (97.0 F)
2015
37.8 C (100.0 F)
2016
36.7 C (98.1 F)
2017
38.3 C (100.9 F)
2018
37.2 C (99.0 F)
2019
40.6 C (105.1 F)
2020
36.7 C (98.1 F)
2021
35.0 C (95.0 F)
2022
37.2 C (99.0 F)
2023
36.7 C (98.1 F)
2024
36.7 C (98.1 F)
2025
32.8 C (91.0 F)
2026
30.0 C (86.0 F)
Coldest night (TNn)
The coldest night of the year at Dunn 4 NW, 1962 to 2026. The record is -20.0 C (-4.0 F) in 1985, marked on the chart; the median year is -10.6 C (12.9 F).
Coldest night (TNn) at Dunn 4 NW by year
Year
Coldest night (TNn)
1962
-13.9 C (7.0 F)
1963
-12.2 C (10.0 F)
1964
-10.6 C (12.9 F)
1965
-10.6 C (12.9 F)
1966
-12.2 C (10.0 F)
1967
-11.7 C (10.9 F)
1968
-12.2 C (10.0 F)
1969
-10.0 C (14.0 F)
1970
-14.4 C (6.1 F)
1971
-14.4 C (6.1 F)
1972
-8.3 C (17.1 F)
1973
-12.8 C (9.0 F)
1974
-7.8 C (18.0 F)
1975
-11.7 C (10.9 F)
1976
-13.3 C (8.1 F)
1977
-16.7 C (1.9 F)
1978
-11.1 C (12.0 F)
1979
-11.7 C (10.9 F)
1980
-14.4 C (6.1 F)
1981
-16.1 C (3.0 F)
1982
-15.6 C (3.9 F)
1983
-15.6 C (3.9 F)
1984
-10.6 C (12.9 F)
1985
-20.0 C (-4.0 F)
1986
-12.2 C (10.0 F)
1987
-7.2 C (19.0 F)
1988
-12.2 C (10.0 F)
1989
-17.2 C (1.0 F)
1990
-6.7 C (19.9 F)
1991
-8.9 C (16.0 F)
1992
-7.2 C (19.0 F)
1993
-8.9 C (16.0 F)
1994
-15.6 C (3.9 F)
1995
-10.6 C (12.9 F)
1996
-15.6 C (3.9 F)
1997
-8.9 C (16.0 F)
1998
-5.6 C (21.9 F)
1999
-9.4 C (15.1 F)
2000
-11.1 C (12.0 F)
2001
-8.9 C (16.0 F)
2002
-7.2 C (19.0 F)
2003
-11.1 C (12.0 F)
2004
-10.6 C (12.9 F)
2005
-10.0 C (14.0 F)
2006
-8.3 C (17.1 F)
2007
-8.9 C (16.0 F)
2008
-8.9 C (16.0 F)
2009
-11.7 C (10.9 F)
2010
-10.0 C (14.0 F)
2011
-9.4 C (15.1 F)
2012
-7.8 C (18.0 F)
2013
-7.8 C (18.0 F)
2014
-15.6 C (3.9 F)
2015
-12.8 C (9.0 F)
2016
-8.3 C (17.1 F)
2017
-10.6 C (12.9 F)
2018
-15.0 C (5.0 F)
2019
-7.2 C (19.0 F)
2020
-6.1 C (21.0 F)
2021
-5.6 C (21.9 F)
2022
-11.1 C (12.0 F)
2023
-5.6 C (21.9 F)
2024
-8.9 C (16.0 F)
2025
-10.0 C (14.0 F)
2026
10.0 C (50.0 F)
Wettest day (Rx1day)
The wettest day of the year at Dunn 4 NW, 1962 to 2026. The record is 188.0 mm (7.4 in) in 1999, marked on the chart; the median year is 80.0 mm (3.1 in).
Wettest day (Rx1day) at Dunn 4 NW by year
Year
Wettest day (Rx1day)
1962
74.2 mm (2.9 in)
1963
114.8 mm (4.5 in)
1964
153.9 mm (6.1 in)
1965
100.1 mm (3.9 in)
1966
46.2 mm (1.8 in)
1967
86.4 mm (3.4 in)
1968
52.1 mm (2.1 in)
1969
53.3 mm (2.1 in)
1970
129.5 mm (5.1 in)
1971
53.6 mm (2.1 in)
1972
127.0 mm (5.0 in)
1973
67.3 mm (2.6 in)
1974
88.9 mm (3.5 in)
1975
67.3 mm (2.6 in)
1976
50.8 mm (2.0 in)
1977
100.3 mm (3.9 in)
1978
92.7 mm (3.6 in)
1979
88.9 mm (3.5 in)
1980
57.2 mm (2.3 in)
1981
71.1 mm (2.8 in)
1982
80.0 mm (3.1 in)
1983
78.7 mm (3.1 in)
1984
86.4 mm (3.4 in)
1985
50.8 mm (2.0 in)
1986
66.5 mm (2.6 in)
1987
77.0 mm (3.0 in)
1988
103.1 mm (4.1 in)
1989
72.9 mm (2.9 in)
1990
59.2 mm (2.3 in)
1991
86.9 mm (3.4 in)
1992
148.6 mm (5.9 in)
1993
95.8 mm (3.8 in)
1994
63.5 mm (2.5 in)
1995
93.5 mm (3.7 in)
1996
165.1 mm (6.5 in)
1997
86.4 mm (3.4 in)
1998
114.3 mm (4.5 in)
1999
188.0 mm (7.4 in)
2000
55.9 mm (2.2 in)
2001
72.4 mm (2.9 in)
2002
64.8 mm (2.6 in)
2003
62.2 mm (2.4 in)
2004
123.2 mm (4.9 in)
2005
40.6 mm (1.6 in)
2006
59.7 mm (2.4 in)
2007
71.1 mm (2.8 in)
2008
79.2 mm (3.1 in)
2009
71.9 mm (2.8 in)
2010
63.5 mm (2.5 in)
2011
83.8 mm (3.3 in)
2012
53.3 mm (2.1 in)
2013
166.9 mm (6.6 in)
2014
101.6 mm (4.0 in)
2015
76.2 mm (3.0 in)
2016
145.3 mm (5.7 in)
2017
94.2 mm (3.7 in)
2018
160.5 mm (6.3 in)
2019
95.3 mm (3.8 in)
2020
131.3 mm (5.2 in)
2021
101.6 mm (4.0 in)
2022
88.9 mm (3.5 in)
2023
65.3 mm (2.6 in)
2024
124.5 mm (4.9 in)
2025
50.8 mm (2.0 in)
2026
0.0 mm (0.00 in)
Wettest five days (Rx5day)
The wettest five days of the year at Dunn 4 NW, 1962 to 2026. The record is 357.6 mm (14.1 in) in 2018, marked on the chart; the median year is 120.2 mm (4.7 in).
Wettest five days (Rx5day) at Dunn 4 NW by year
Year
Wettest five days (Rx5day)
1962
92.7 mm (3.6 in)
1963
128.0 mm (5.0 in)
1964
281.1 mm (11.1 in)
1965
134.1 mm (5.3 in)
1966
86.3 mm (3.4 in)
1967
135.7 mm (5.3 in)
1968
109.5 mm (4.3 in)
1969
106.1 mm (4.2 in)
1970
129.5 mm (5.1 in)
1971
91.9 mm (3.6 in)
1972
151.3 mm (6.0 in)
1973
82.3 mm (3.2 in)
1974
94.2 mm (3.7 in)
1975
105.1 mm (4.1 in)
1976
69.3 mm (2.7 in)
1977
103.7 mm (4.1 in)
1978
121.1 mm (4.8 in)
1979
142.2 mm (5.6 in)
1980
69.8 mm (2.7 in)
1981
144.2 mm (5.7 in)
1982
96.2 mm (3.8 in)
1983
109.2 mm (4.3 in)
1984
181.9 mm (7.2 in)
1985
95.8 mm (3.8 in)
1986
101.1 mm (4.0 in)
1987
122.2 mm (4.8 in)
1988
135.9 mm (5.4 in)
1989
185.2 mm (7.3 in)
1990
114.0 mm (4.5 in)
1991
146.4 mm (5.8 in)
1992
149.1 mm (5.9 in)
1993
134.7 mm (5.3 in)
1994
107.2 mm (4.2 in)
1995
130.1 mm (5.1 in)
1996
219.5 mm (8.6 in)
1997
140.5 mm (5.5 in)
1998
126.0 mm (5.0 in)
1999
194.4 mm (7.7 in)
2000
123.2 mm (4.9 in)
2001
116.5 mm (4.6 in)
2002
106.2 mm (4.2 in)
2003
96.7 mm (3.8 in)
2004
165.4 mm (6.5 in)
2005
54.6 mm (2.1 in)
2006
96.3 mm (3.8 in)
2007
108.4 mm (4.3 in)
2008
119.2 mm (4.7 in)
2009
157.0 mm (6.2 in)
2010
211.3 mm (8.3 in)
2011
121.9 mm (4.8 in)
2012
86.8 mm (3.4 in)
2013
266.0 mm (10.5 in)
2014
111.8 mm (4.4 in)
2015
100.1 mm (3.9 in)
2016
150.4 mm (5.9 in)
2017
101.3 mm (4.0 in)
2018
357.6 mm (14.1 in)
2019
96.6 mm (3.8 in)
2020
144.8 mm (5.7 in)
2021
106.7 mm (4.2 in)
2022
207.3 mm (8.2 in)
2023
94.8 mm (3.7 in)
2024
178.0 mm (7.0 in)
2025
60.7 mm (2.4 in)
2026
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Dunn 4 NW, 1962 to 2026. The record is 39 days in 2000, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Dunn 4 NW by year
Year
Longest dry spell (CDD)
1962
17 days
1963
21 days
1964
21 days
1965
34 days
1966
16 days
1967
22 days
1968
37 days
1969
29 days
1970
25 days
1971
21 days
1972
15 days
1973
31 days
1974
23 days
1975
16 days
1976
29 days
1977
23 days
1978
33 days
1979
27 days
1980
17 days
1981
22 days
1982
21 days
1983
18 days
1984
17 days
1985
26 days
1986
31 days
1987
26 days
1988
22 days
1989
20 days
1990
24 days
1991
29 days
1992
25 days
1993
21 days
1994
15 days
1995
15 days
1996
16 days
1997
16 days
1998
24 days
1999
21 days
2000
39 days
2001
39 days
2002
19 days
2003
15 days
2004
14 days
2005
23 days
2006
18 days
2007
20 days
2008
16 days
2009
14 days
2010
24 days
2011
19 days
2012
25 days
2013
18 days
2014
24 days
2015
18 days
2016
35 days
2017
16 days
2018
13 days
2019
13 days
2020
16 days
2021
18 days
2022
17 days
2023
31 days
2024
26 days
2025
13 days
2026
2 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 Dunn 4 NW falls on 29 March and the median first autumn frost on 2 November, which leaves a median of 217 days between them.
Fitted over all years, the growing season changes by +5.9 days per decade at this station.
Frost dates and growing season at Dunn 4 NW
Measure
Median, all years
Earliest period
Recent period (1995 to 2024)
Recent against earliest
Fitted trend
Last spring frost
29 March
n/a
27 March
n/a
-2.5 days per decade
First autumn frost
2 November
n/a
7 November
n/a
+3.3 days per decade
Growing days
217 days
n/a
225 days
n/a
+5.9 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
59 years, 1963 to 2024
A day with at least 82.0 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 215.2 mm (8.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Dunn 4 NW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
82.0 mm (3.2 in)
5 years
112.0 mm (4.4 in)
10 years
134.0 mm (5.3 in)
25 years
164.4 mm (6.5 in)
50 years
189.0 mm (7.4 in)
100 years
215.2 mm (8.5 in)
Longer than the 59 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, 59 years of values from 1963 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: 188.0 mm (7.4 in) in 1999; 166.9 mm (6.6 in) in 2013; 165.1 mm (6.5 in) in 1996.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Dunn 4 NW, at 1985 and 2008. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1985 ran 0.5 C (0.8 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 2008 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Dunn 4 NW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1985
-0.5
-0.8
possible
5
2008
+0.3
+0.5
possible
5
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.
Climate Twins
2010 to 2024 against 1961 to 1990
Over 2010 to 2024, Dunn 4 NW had a mean temperature of 16.9 C (62.5 F) and 1,315.4 mm (51.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Plain Dealing (United States, 1,402 km away), Gainesville Lock (United States, 913 km away) and Warrenton (United States, 420 km away).
Climate twins of Dunn 4 NW: stations whose 1961 to 1990 climate is closest to its 2010 to 2024 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 Dunn 4 NW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Dunn 4 NW 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.