Record envelope, standing records and threshold days for Raleigh 4 SW (USC00317074), North Carolina, United States, with 90 years of record.
Key Facts for Raleigh 4 SW
Raleigh 4 SW (USC00317074) is a weather station in North Carolina, United States at 35.73 latitude and -78.68 longitude, 128 m (420 ft) above sea level.
The station reports from 1921 to 2010, 90 years of record.
1,464 records set at Raleigh 4 SW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Raleigh 4 SW tied a daily record high minimum temperature of 21.1 C (70.0 F) on 15 May 2010.
About the Station
Location: North Carolina, United States, 35.73 latitude, -78.68 longitude.
Elevation: 128 m (420 ft).
Period of record: 1921 to 2010, 90 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 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 Raleigh 4 SW. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Raleigh 4 SW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-21.1 C (-6.0 F)
n/a
n/a
Feb
27.8 C (82.0 F)
-17.2 C (1.0 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-11.1 C (12.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-6.1 C (21.0 F)
n/a
n/a
May
35.6 C (96.1 F)
0.6 C (33.1 F)
n/a
n/a
Jun
39.4 C (102.9 F)
5.0 C (41.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
8.9 C (48.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
8.9 C (48.0 F)
n/a
n/a
Sep
39.4 C (102.9 F)
2.8 C (37.0 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-4.4 C (24.1 F)
n/a
n/a
Nov
29.4 C (84.9 F)
-10.6 C (12.9 F)
n/a
n/a
Dec
26.1 C (79.0 F)
-15.0 C (5.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Raleigh 4 SW still stand. 1937 holds the most, with 44.
Standing records at Raleigh 4 SW by the year they were set
Year set
Standing records
1921
13
1922
25
1923
21
1924
15
1925
30
1926
25
1927
28
1928
14
1929
27
1930
25
1931
27
1932
28
1933
35
1934
31
1935
23
1936
37
1937
44
1938
5
1954
16
1955
7
1956
17
1957
12
1958
17
1959
17
1960
19
1961
25
1962
26
1963
25
1964
16
1965
13
1966
15
1967
26
1968
16
1969
11
1970
23
1971
15
1972
14
1973
22
1974
32
1975
15
1976
35
1977
37
1978
21
1979
14
1980
18
1981
25
1982
11
1983
32
1984
30
1985
29
1986
16
1987
7
1988
18
1989
23
1990
15
1991
19
1992
23
1993
17
1994
16
1995
10
1996
12
1997
20
1998
14
1999
18
2000
11
2001
9
2002
24
2003
7
2004
12
2005
14
2006
6
2007
24
2008
15
2009
5
2010
5
All-Time Record Progression
13 new records
13 all-time records were set at Raleigh 4 SW between 23 January 1954 and 25 May 2004. Each dot is a new record.
When Raleigh 4 SW set new all-time records
Date
Kind
Detail
1954-01-23
Record snow depth
Record snow depth 12.7 cm (5.0 in)
1958-12-11
Record snow depth
Record snow depth 17.8 cm (7.0 in)
1958-12-12
Record snow depth
Record snow depth 20.3 cm (8.0 in)
1958-12-14
Record snow depth
Record snow depth 22.9 cm (9.0 in)
1970-01-22
Record low minimum temperature
Record low minimum temperature -16.7 C (1.9 F)
1977-01-17
Record low minimum temperature
Record low minimum temperature -17.2 C (1.0 F)
1980-03-02
Record low maximum temperature
Record low maximum temperature -8.3 C (17.1 F)
1985-01-21
Record low minimum temperature
Record low minimum temperature -21.1 C (-6.0 F)
1988-08-22
Record high minimum temperature
Record high minimum temperature 27.8 C (82.0 F)
1996-09-06
Record daily precipitation
Record daily precipitation 211.3 mm (8.3 in)
2000-01-25
Record daily snowfall
Record daily snowfall 31.2 cm (12.3 in)
2000-01-25
Record snow depth
Record snow depth 30.5 cm (12.0 in)
2004-05-25
Record high minimum temperature
Record high minimum temperature 29.4 C (84.9 F)
Wettest Day of Each Month
Sep: 211.3 mm (8.3 in)
The wettest day on record for each calendar month at Raleigh 4 SW. The most was 211.3 mm (8.3 in) on 6 September 1996.
Record daily precipitation for each month at Raleigh 4 SW
Month
Record daily precipitation (mm)
Date
Jan
73.7 mm (2.9 in)
15 January 1995
Feb
114.3 mm (4.5 in)
2 February 1973
Mar
95.5 mm (3.8 in)
18 March 1983
Apr
113.8 mm (4.5 in)
26 April 1978
May
114.3 mm (4.5 in)
11 May 1957
Jun
170.7 mm (6.7 in)
14 June 2006
Jul
108.7 mm (4.3 in)
5 July 1965
Aug
123.2 mm (4.9 in)
17 August 1955
Sep
211.3 mm (8.3 in)
6 September 1996
Oct
128.3 mm (5.1 in)
1 October 1929
Nov
121.4 mm (4.8 in)
29 November 1934
Dec
68.6 mm (2.7 in)
4 December 1931
Period of Record Coverage
1921 to 2010
Complete yearUnder 90 percent of days
75 years of record at Raleigh 4 SW, 1921 to 2010. 14 years have data for under 90 percent of days and are left out of rankings: 1924, 1926, 1927, 1928, 1929, 1930, 1938, 1954 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 56 complete years at Raleigh 4 SW, 1921 to 2008. Blue stripes are years cooler than the station's own mean of 16.0 C (60.8 F); red stripes are warmer. The coolest year was 1978, at 14.7 C (58.5 F), and the warmest was 1933, at 17.4 C (63.2 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Raleigh 4 SW as warming stripes, 1921 to 2008
Year
Annual mean temperature
Difference from the station mean
1921
17.1 C
+1.05 C
1923
16.2 C
+0.21 C
1925
16.5 C
+0.51 C
1931
16.6 C
+0.57 C
1932
16.7 C
+0.67 C
1933
17.4 C
+1.34 C
1934
15.9 C
-0.12 C
1935
15.6 C
-0.46 C
1936
15.6 C
-0.47 C
1956
16.5 C
+0.44 C
1957
16.4 C
+0.36 C
1958
15.2 C
-0.82 C
1959
16.6 C
+0.56 C
1960
15.5 C
-0.48 C
1961
15.9 C
-0.14 C
1962
15.6 C
-0.40 C
1963
15.4 C
-0.66 C
1964
16.2 C
+0.14 C
1965
16.2 C
+0.13 C
1966
15.6 C
-0.46 C
1967
15.7 C
-0.37 C
1968
15.5 C
-0.57 C
1969
15.1 C
-0.92 C
1970
16.1 C
+0.03 C
1971
16.2 C
+0.13 C
1972
15.5 C
-0.54 C
1973
15.9 C
-0.09 C
1974
16.0 C
-0.06 C
1975
15.9 C
-0.15 C
1977
15.6 C
-0.40 C
1978
14.7 C
-1.32 C
1979
15.3 C
-0.76 C
1980
15.6 C
-0.38 C
1981
14.9 C
-1.15 C
1982
15.6 C
-0.45 C
1984
16.1 C
+0.05 C
1985
16.5 C
+0.43 C
1988
15.2 C
-0.82 C
1989
15.6 C
-0.44 C
1990
17.1 C
+1.11 C
1991
16.7 C
+0.71 C
1992
15.7 C
-0.36 C
1993
15.8 C
-0.21 C
1994
16.1 C
+0.04 C
1997
15.6 C
-0.40 C
1998
16.8 C
+0.79 C
1999
16.6 C
+0.56 C
2000
15.6 C
-0.43 C
2001
16.2 C
+0.21 C
2002
16.8 C
+0.74 C
2003
15.9 C
-0.12 C
2004
16.6 C
+0.56 C
2005
16.6 C
+0.60 C
2006
16.7 C
+0.70 C
2007
17.1 C
+1.09 C
2008
16.4 C
+0.42 C
The fitted trend in annual mean temperature here over 1921 to 2008 is 0.00 C (-0.07 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.00 F (-0.13 to 0.12) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Raleigh 4 SW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.00 C (-0.07 to 0.07) per decade
0.00 F (-0.13 to 0.12) per decade
1921 to 2008
56
Not clearly different from zero
Mean daily maximum
0.01 C (-0.06 to 0.08) per decade
0.01 F (-0.11 to 0.14) per decade
1921 to 2008
56
Not clearly different from zero
Mean daily minimum
-0.01 C (-0.09 to 0.07) per decade
-0.02 F (-0.17 to 0.12) per decade
1921 to 2008
56
Not clearly different from zero
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
1921 to 2010
Yearly extremes at Raleigh 4 SW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1932
36.7 C (98.1 F)
75
Coldest night (TNn)
-21.1 C (-6.0 F)
1985
-11.7 C (10.9 F)
75
Wettest day (Rx1day)
211.3 mm (8.3 in)
1996
76.6 mm (3.0 in)
90
Wettest five days (Rx5day)
283.9 mm (11.2 in)
1945
115.0 mm (4.5 in)
90
Longest dry spell (CDD)
40 days
1973
20 days
90
Hottest day (TXx)
The hottest day of the year at Raleigh 4 SW, 1921 to 2010. The record is 40.6 C (105.1 F) in 1932, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Raleigh 4 SW by year
Year
Hottest day (TXx)
1921
37.2 C (99.0 F)
1922
35.6 C (96.1 F)
1923
36.1 C (97.0 F)
1924
36.7 C (98.1 F)
1925
36.7 C (98.1 F)
1926
38.3 C (100.9 F)
1927
36.7 C (98.1 F)
1928
35.0 C (95.0 F)
1929
33.9 C (93.0 F)
1930
36.7 C (98.1 F)
1931
37.2 C (99.0 F)
1932
40.6 C (105.1 F)
1933
39.4 C (102.9 F)
1934
37.2 C (99.0 F)
1935
37.8 C (100.0 F)
1936
39.4 C (102.9 F)
1937
39.4 C (102.9 F)
1938
28.9 C (84.0 F)
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
37.2 C (99.0 F)
1955
32.8 C (91.0 F)
1956
36.1 C (97.0 F)
1957
37.2 C (99.0 F)
1958
35.6 C (96.1 F)
1959
39.4 C (102.9 F)
1960
35.0 C (95.0 F)
1961
35.6 C (96.1 F)
1962
35.6 C (96.1 F)
1963
35.0 C (95.0 F)
1964
37.8 C (100.0 F)
1965
35.0 C (95.0 F)
1966
37.8 C (100.0 F)
1967
33.3 C (91.9 F)
1968
37.8 C (100.0 F)
1969
36.7 C (98.1 F)
1970
36.1 C (97.0 F)
1971
35.6 C (96.1 F)
1972
35.0 C (95.0 F)
1973
35.0 C (95.0 F)
1974
35.0 C (95.0 F)
1975
36.7 C (98.1 F)
1976
36.7 C (98.1 F)
1977
40.0 C (104.0 F)
1978
35.6 C (96.1 F)
1979
36.1 C (97.0 F)
1980
38.3 C (100.9 F)
1981
37.8 C (100.0 F)
1982
35.0 C (95.0 F)
1983
39.4 C (102.9 F)
1984
34.4 C (93.9 F)
1985
35.6 C (96.1 F)
1986
38.3 C (100.9 F)
1987
36.1 C (97.0 F)
1988
38.9 C (102.0 F)
1989
34.4 C (93.9 F)
1990
36.7 C (98.1 F)
1991
35.0 C (95.0 F)
1992
34.4 C (93.9 F)
1993
37.2 C (99.0 F)
1994
36.1 C (97.0 F)
1995
36.7 C (98.1 F)
1996
35.0 C (95.0 F)
1997
36.1 C (97.0 F)
1998
36.7 C (98.1 F)
1999
39.4 C (102.9 F)
2000
35.0 C (95.0 F)
2001
34.4 C (93.9 F)
2002
37.2 C (99.0 F)
2003
33.3 C (91.9 F)
2004
35.0 C (95.0 F)
2005
37.8 C (100.0 F)
2006
36.7 C (98.1 F)
2007
39.4 C (102.9 F)
2008
37.2 C (99.0 F)
2009
35.0 C (95.0 F)
2010
33.3 C (91.9 F)
Coldest night (TNn)
The coldest night of the year at Raleigh 4 SW, 1921 to 2010. The record is -21.1 C (-6.0 F) in 1985, marked on the chart; the median year is -11.7 C (10.9 F).
Coldest night (TNn) at Raleigh 4 SW by year
Year
Coldest night (TNn)
1921
-8.9 C (16.0 F)
1922
-11.7 C (10.9 F)
1923
-8.9 C (16.0 F)
1924
-9.4 C (15.1 F)
1925
-11.7 C (10.9 F)
1926
-10.6 C (12.9 F)
1927
-12.8 C (9.0 F)
1928
-13.9 C (7.0 F)
1929
-11.1 C (12.0 F)
1930
-8.3 C (17.1 F)
1931
-8.3 C (17.1 F)
1932
-10.6 C (12.9 F)
1933
-10.6 C (12.9 F)
1934
-15.0 C (5.0 F)
1935
-15.0 C (5.0 F)
1936
-16.1 C (3.0 F)
1937
-11.7 C (10.9 F)
1938
-10.0 C (14.0 F)
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
-9.4 C (15.1 F)
1955
-11.1 C (12.0 F)
1956
-5.6 C (21.9 F)
1957
-11.1 C (12.0 F)
1958
-14.4 C (6.1 F)
1959
-11.7 C (10.9 F)
1960
-10.0 C (14.0 F)
1961
-12.2 C (10.0 F)
1962
-15.0 C (5.0 F)
1963
-13.3 C (8.1 F)
1964
-10.6 C (12.9 F)
1965
-10.6 C (12.9 F)
1966
-13.3 C (8.1 F)
1967
-12.8 C (9.0 F)
1968
-11.7 C (10.9 F)
1969
-12.2 C (10.0 F)
1970
-16.7 C (1.9 F)
1971
-11.1 C (12.0 F)
1972
-15.0 C (5.0 F)
1973
-12.8 C (9.0 F)
1974
-8.3 C (17.1 F)
1975
-13.3 C (8.1 F)
1976
-15.6 C (3.9 F)
1977
-17.2 C (1.0 F)
1978
-12.8 C (9.0 F)
1979
-13.3 C (8.1 F)
1980
-13.9 C (7.0 F)
1981
-15.6 C (3.9 F)
1982
-16.7 C (1.9 F)
1983
-15.0 C (5.0 F)
1984
-11.7 C (10.9 F)
1985
-21.1 C (-6.0 F)
1986
-12.8 C (9.0 F)
1987
-8.3 C (17.1 F)
1988
-12.2 C (10.0 F)
1989
-13.3 C (8.1 F)
1990
-7.8 C (18.0 F)
1991
-10.0 C (14.0 F)
1992
-7.8 C (18.0 F)
1993
-10.0 C (14.0 F)
1994
-16.7 C (1.9 F)
1995
-11.1 C (12.0 F)
1996
-17.2 C (1.0 F)
1997
-10.6 C (12.9 F)
1998
-7.2 C (19.0 F)
1999
-10.6 C (12.9 F)
2000
-11.7 C (10.9 F)
2001
-10.0 C (14.0 F)
2002
-7.8 C (18.0 F)
2003
-11.1 C (12.0 F)
2004
-10.6 C (12.9 F)
2005
-11.1 C (12.0 F)
2006
-8.3 C (17.1 F)
2007
-9.4 C (15.1 F)
2008
-8.9 C (16.0 F)
2009
-12.2 C (10.0 F)
2010
-9.4 C (15.1 F)
Wettest day (Rx1day)
The wettest day of the year at Raleigh 4 SW, 1921 to 2010. The record is 211.3 mm (8.3 in) in 1996, marked on the chart; the median year is 76.6 mm (3.0 in).
Wettest day (Rx1day) at Raleigh 4 SW by year
Year
Wettest day (Rx1day)
1921
45.7 mm (1.8 in)
1922
76.2 mm (3.0 in)
1923
61.0 mm (2.4 in)
1924
69.9 mm (2.8 in)
1925
55.9 mm (2.2 in)
1926
50.8 mm (2.0 in)
1927
67.3 mm (2.6 in)
1928
49.5 mm (1.9 in)
1929
128.3 mm (5.1 in)
1930
46.5 mm (1.8 in)
1931
101.1 mm (4.0 in)
1932
83.3 mm (3.3 in)
1933
52.6 mm (2.1 in)
1934
121.4 mm (4.8 in)
1935
55.1 mm (2.2 in)
1936
91.4 mm (3.6 in)
1937
51.1 mm (2.0 in)
1938
43.9 mm (1.7 in)
1939
72.9 mm (2.9 in)
1940
38.6 mm (1.5 in)
1941
55.1 mm (2.2 in)
1942
70.4 mm (2.8 in)
1943
105.9 mm (4.2 in)
1944
78.0 mm (3.1 in)
1945
104.6 mm (4.1 in)
1946
103.1 mm (4.1 in)
1947
120.7 mm (4.8 in)
1948
85.1 mm (3.4 in)
1949
75.4 mm (3.0 in)
1950
64.8 mm (2.6 in)
1951
93.2 mm (3.7 in)
1952
92.2 mm (3.6 in)
1953
94.0 mm (3.7 in)
1954
104.1 mm (4.1 in)
1955
123.2 mm (4.9 in)
1956
69.3 mm (2.7 in)
1957
114.3 mm (4.5 in)
1958
71.9 mm (2.8 in)
1959
62.5 mm (2.5 in)
1960
72.4 mm (2.9 in)
1961
65.8 mm (2.6 in)
1962
78.7 mm (3.1 in)
1963
110.0 mm (4.3 in)
1964
78.7 mm (3.1 in)
1965
108.7 mm (4.3 in)
1966
49.0 mm (1.9 in)
1967
110.2 mm (4.3 in)
1968
53.3 mm (2.1 in)
1969
65.5 mm (2.6 in)
1970
36.3 mm (1.4 in)
1971
64.8 mm (2.6 in)
1972
78.2 mm (3.1 in)
1973
114.3 mm (4.5 in)
1974
79.0 mm (3.1 in)
1975
72.4 mm (2.9 in)
1976
77.5 mm (3.1 in)
1977
109.2 mm (4.3 in)
1978
113.8 mm (4.5 in)
1979
96.0 mm (3.8 in)
1980
61.0 mm (2.4 in)
1981
52.8 mm (2.1 in)
1982
42.7 mm (1.7 in)
1983
95.5 mm (3.8 in)
1984
95.3 mm (3.8 in)
1985
79.2 mm (3.1 in)
1986
100.8 mm (4.0 in)
1987
51.3 mm (2.0 in)
1988
54.9 mm (2.2 in)
1989
95.3 mm (3.8 in)
1990
72.1 mm (2.8 in)
1991
77.0 mm (3.0 in)
1992
64.3 mm (2.5 in)
1993
66.3 mm (2.6 in)
1994
104.1 mm (4.1 in)
1995
99.1 mm (3.9 in)
1996
211.3 mm (8.3 in)
1997
54.6 mm (2.1 in)
1998
63.5 mm (2.5 in)
1999
123.2 mm (4.9 in)
2000
52.3 mm (2.1 in)
2001
100.8 mm (4.0 in)
2002
103.6 mm (4.1 in)
2003
50.0 mm (2.0 in)
2004
58.9 mm (2.3 in)
2005
51.8 mm (2.0 in)
2006
170.7 mm (6.7 in)
2007
95.5 mm (3.8 in)
2008
122.7 mm (4.8 in)
2009
146.3 mm (5.8 in)
2010
56.4 mm (2.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Raleigh 4 SW, 1921 to 2010. The record is 283.9 mm (11.2 in) in 1945, marked on the chart; the median year is 115.0 mm (4.5 in).
Wettest five days (Rx5day) at Raleigh 4 SW by year
Year
Wettest five days (Rx5day)
1921
73.6 mm (2.9 in)
1922
116.8 mm (4.6 in)
1923
86.1 mm (3.4 in)
1924
135.2 mm (5.3 in)
1925
64.3 mm (2.5 in)
1926
89.7 mm (3.5 in)
1927
122.7 mm (4.8 in)
1928
91.0 mm (3.6 in)
1929
215.2 mm (8.5 in)
1930
112.7 mm (4.4 in)
1931
155.6 mm (6.1 in)
1932
112.6 mm (4.4 in)
1933
66.3 mm (2.6 in)
1934
133.1 mm (5.2 in)
1935
103.1 mm (4.1 in)
1936
111.0 mm (4.4 in)
1937
83.6 mm (3.3 in)
1938
120.6 mm (4.7 in)
1939
104.9 mm (4.1 in)
1940
73.4 mm (2.9 in)
1941
137.4 mm (5.4 in)
1942
95.0 mm (3.7 in)
1943
135.6 mm (5.3 in)
1944
133.9 mm (5.3 in)
1945
283.9 mm (11.2 in)
1946
115.2 mm (4.5 in)
1947
164.6 mm (6.5 in)
1948
105.0 mm (4.1 in)
1949
115.9 mm (4.6 in)
1950
98.8 mm (3.9 in)
1951
126.9 mm (5.0 in)
1952
120.2 mm (4.7 in)
1953
95.0 mm (3.7 in)
1954
107.7 mm (4.2 in)
1955
154.1 mm (6.1 in)
1956
89.6 mm (3.5 in)
1957
165.4 mm (6.5 in)
1958
123.2 mm (4.9 in)
1959
88.2 mm (3.5 in)
1960
118.9 mm (4.7 in)
1961
86.9 mm (3.4 in)
1962
93.4 mm (3.7 in)
1963
144.3 mm (5.7 in)
1964
109.8 mm (4.3 in)
1965
142.6 mm (5.6 in)
1966
90.9 mm (3.6 in)
1967
126.7 mm (5.0 in)
1968
70.9 mm (2.8 in)
1969
140.0 mm (5.5 in)
1970
65.0 mm (2.6 in)
1971
97.4 mm (3.8 in)
1972
85.5 mm (3.4 in)
1973
148.3 mm (5.8 in)
1974
130.5 mm (5.1 in)
1975
193.0 mm (7.6 in)
1976
89.2 mm (3.5 in)
1977
131.8 mm (5.2 in)
1978
137.4 mm (5.4 in)
1979
138.5 mm (5.5 in)
1980
97.8 mm (3.9 in)
1981
98.3 mm (3.9 in)
1982
76.8 mm (3.0 in)
1983
115.1 mm (4.5 in)
1984
187.0 mm (7.4 in)
1985
101.3 mm (4.0 in)
1986
149.6 mm (5.9 in)
1987
121.7 mm (4.8 in)
1988
99.0 mm (3.9 in)
1989
141.3 mm (5.6 in)
1990
91.4 mm (3.6 in)
1991
120.7 mm (4.8 in)
1992
76.3 mm (3.0 in)
1993
84.3 mm (3.3 in)
1994
121.4 mm (4.8 in)
1995
131.6 mm (5.2 in)
1996
236.7 mm (9.3 in)
1997
81.3 mm (3.2 in)
1998
114.8 mm (4.5 in)
1999
167.9 mm (6.6 in)
2000
102.2 mm (4.0 in)
2001
156.7 mm (6.2 in)
2002
109.2 mm (4.3 in)
2003
102.3 mm (4.0 in)
2004
100.4 mm (4.0 in)
2005
75.0 mm (3.0 in)
2006
218.2 mm (8.6 in)
2007
131.8 mm (5.2 in)
2008
138.9 mm (5.5 in)
2009
153.9 mm (6.1 in)
2010
105.4 mm (4.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Raleigh 4 SW, 1921 to 2010. The record is 40 days in 1973, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Raleigh 4 SW by year
Year
Longest dry spell (CDD)
1921
28 days
1922
20 days
1923
25 days
1924
25 days
1925
21 days
1926
25 days
1927
15 days
1928
15 days
1929
18 days
1930
21 days
1931
35 days
1932
26 days
1933
21 days
1934
15 days
1935
17 days
1936
19 days
1937
24 days
1938
19 days
1939
28 days
1940
20 days
1941
23 days
1942
19 days
1943
33 days
1944
21 days
1945
17 days
1946
18 days
1947
17 days
1948
17 days
1949
20 days
1950
14 days
1951
13 days
1952
25 days
1953
22 days
1954
22 days
1955
20 days
1956
19 days
1957
16 days
1958
20 days
1959
21 days
1960
17 days
1961
15 days
1962
27 days
1963
22 days
1964
18 days
1965
32 days
1966
19 days
1967
19 days
1968
27 days
1969
23 days
1970
25 days
1971
14 days
1972
19 days
1973
40 days
1974
23 days
1975
17 days
1976
29 days
1977
19 days
1978
22 days
1979
16 days
1980
15 days
1981
32 days
1982
16 days
1983
16 days
1984
18 days
1985
23 days
1986
21 days
1987
19 days
1988
15 days
1989
20 days
1990
29 days
1991
18 days
1992
18 days
1993
18 days
1994
17 days
1995
15 days
1996
13 days
1997
16 days
1998
25 days
1999
22 days
2000
39 days
2001
39 days
2002
19 days
2003
14 days
2004
14 days
2005
30 days
2006
24 days
2007
21 days
2008
16 days
2009
16 days
2010
12 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
56 years with a frost
Across 56 years with a frost, the median last spring frost at Raleigh 4 SW falls on 1 April and the median first autumn frost on 4 November, which leaves a median of 220 days between them.
Fitted over all years, the growing season changes by -0.8 days per decade at this station.
Frost dates and growing season at Raleigh 4 SW
Measure
Median, all years
Earliest period
Recent period (1973 to 2008)
Recent against earliest
Fitted trend
Last spring frost
1 April
n/a
8 April
n/a
+0.7 days per decade
First autumn frost
4 November
n/a
3 November
n/a
-0.1 days per decade
Growing days
220 days
n/a
215 days
n/a
-0.8 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
85 years, 1921 to 2009
A day with at least 78.1 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 177.1 mm (7.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Raleigh 4 SW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
78.1 mm (3.1 in)
5 years
104.4 mm (4.1 in)
10 years
121.9 mm (4.8 in)
25 years
144.1 mm (5.7 in)
50 years
160.6 mm (6.3 in)
100 years
177.1 mm (7.0 in)
Longer than the 85 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, 85 years of values from 1921 to 2009.
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: 211.3 mm (8.3 in) in 1996; 170.7 mm (6.7 in) in 2006; 146.3 mm (5.8 in) in 2009.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Raleigh 4 SW, at 1975. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1975 ran 0.2 C (0.4 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Raleigh 4 SW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1975
-0.2
-0.4
likely
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.
Download the Data
Data for Raleigh 4 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Raleigh 4 SW 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.