Record envelope, standing records and threshold days for Grafton (USC00323594), North Dakota, United States, with 119 years of record.
Key Facts for Grafton
Grafton (USC00323594) is a weather station in North Dakota, United States at 48.42 latitude and -97.42 longitude, 252 m (827 ft) above sea level.
The station reports from 1893 to 2011, 119 years of record.
1,464 records set at Grafton still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Grafton set a daily record precipitation of 50.8 mm (2.0 in) on 26 June 2010.
About the Station
Location: North Dakota, United States, 48.42 latitude, -97.42 longitude.
Elevation: 252 m (827 ft).
Period of record: 1893 to 2011, 119 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 Grafton. 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 Grafton, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.1 C (52.0 F)
-42.8 C (-45.0 F)
n/a
n/a
Feb
18.3 C (64.9 F)
-43.9 C (-47.0 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-37.2 C (-35.0 F)
n/a
n/a
Apr
37.8 C (100.0 F)
-23.9 C (-11.0 F)
n/a
n/a
May
41.7 C (107.1 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
40.0 C (104.0 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
42.2 C (108.0 F)
1.1 C (34.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
40.0 C (104.0 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-37.8 C (-36.0 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-38.9 C (-38.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Grafton still stand. 1936 holds the most, with 47.
Standing records at Grafton by the year they were set
Year set
Standing records
1893
22
1894
15
1895
17
1896
23
1897
28
1898
8
1899
20
1900
13
1901
10
1902
9
1903
16
1904
9
1905
5
1906
14
1907
14
1908
14
1909
4
1910
14
1911
15
1912
14
1913
16
1914
27
1915
16
1916
14
1917
34
1918
19
1919
29
1920
6
1921
3
1922
5
1923
14
1924
14
1925
9
1926
11
1927
12
1928
10
1929
7
1930
3
1931
19
1932
10
1933
6
1934
25
1935
13
1936
47
1937
8
1938
9
1939
15
1940
10
1941
9
1942
13
1943
6
1944
5
1945
13
1946
13
1947
16
1948
11
1949
8
1950
12
1951
11
1952
18
1953
11
1954
10
1955
10
1956
9
1958
16
1959
17
1960
3
1961
6
1962
15
1963
15
1964
18
1965
6
1966
12
1967
12
1968
16
1969
14
1970
7
1971
3
1972
11
1973
3
1974
11
1975
8
1976
11
1977
19
1978
12
1979
10
1980
9
1981
13
1982
4
1983
13
1984
10
1985
17
1986
10
1987
12
1988
14
1989
16
1990
23
1991
32
1992
14
1993
8
1994
12
1995
16
1996
12
1997
16
1998
10
1999
12
2000
20
2001
9
2002
6
2003
16
2004
11
2005
8
2006
6
All-Time Record Progression
6 new records
6 all-time records were set at Grafton between 25 July 1931 and 27 December 1988. Each dot is a new record.
When Grafton set new all-time records
Date
Kind
Detail
1931-07-25
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
1934-05-30
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1936-07-11
Record high maximum temperature
Record high maximum temperature 42.2 C (108.0 F)
1947-08-23
Record high minimum temperature
Record high minimum temperature 30.0 C (86.0 F)
1957-09-02
Record daily precipitation
Record daily precipitation 188.5 mm (7.4 in)
1988-12-27
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
Wettest Day of Each Month
Sep: 188.5 mm (7.4 in)
The wettest day on record for each calendar month at Grafton. The most was 188.5 mm (7.4 in) on 2 September 1957.
Record daily precipitation for each month at Grafton
Month
Record daily precipitation (mm)
Date
Jan
44.5 mm (1.8 in)
8 January 1989
Feb
38.1 mm (1.5 in)
7 February 2006
Mar
39.4 mm (1.6 in)
27 March 2004
Apr
80.5 mm (3.2 in)
30 April 1896
May
88.9 mm (3.5 in)
18 May 1896
Jun
121.7 mm (4.8 in)
12 June 2000
Jul
127.0 mm (5.0 in)
21 July 1897
Aug
102.9 mm (4.1 in)
15 August 1974
Sep
188.5 mm (7.4 in)
2 September 1957
Oct
86.4 mm (3.4 in)
10 October 1949
Nov
65.8 mm (2.6 in)
14 November 1944
Dec
30.5 mm (1.2 in)
27 December 1988
Period of Record Coverage
1893 to 2011
Complete yearUnder 90 percent of days
115 years of record at Grafton, 1893 to 2011. 30 years have data for under 90 percent of days and are left out of rankings: 1893, 1898, 1899, 1900, 1901, 1902, 1903, 1904 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 80 complete years at Grafton, 1894 to 2004. Blue stripes are years cooler than the station's own mean of 4.3 C (39.7 F); red stripes are warmer. The coolest year was 1917, at 0.8 C (33.5 F), and the warmest was 1987, at 7.7 C (45.8 F). The strongest colour marks a difference of 3.5 C (6.3 F).
Annual mean temperature at Grafton as warming stripes, 1894 to 2004
Year
Annual mean temperature
Difference from the station mean
1894
3.6 C
-0.70 C
1896
1.7 C
-2.56 C
1897
1.9 C
-2.41 C
1901
4.3 C
-0.02 C
1906
3.5 C
-0.79 C
1911
2.8 C
-1.54 C
1914
3.4 C
-0.91 C
1915
3.6 C
-0.71 C
1916
1.6 C
-2.72 C
1917
0.8 C
-3.47 C
1918
3.2 C
-1.09 C
1919
2.9 C
-1.38 C
1920
3.8 C
-0.45 C
1921
4.8 C
+0.50 C
1922
4.7 C
+0.36 C
1923
4.8 C
+0.51 C
1924
3.1 C
-1.17 C
1925
4.2 C
-0.05 C
1926
4.0 C
-0.25 C
1927
3.5 C
-0.77 C
1928
5.3 C
+0.98 C
1929
3.0 C
-1.26 C
1930
4.9 C
+0.65 C
1931
6.9 C
+2.57 C
1932
4.4 C
+0.06 C
1933
4.6 C
+0.28 C
1934
5.7 C
+1.43 C
1935
3.9 C
-0.43 C
1936
3.3 C
-0.98 C
1937
3.6 C
-0.68 C
1938
5.5 C
+1.21 C
1939
5.5 C
+1.24 C
1940
5.0 C
+0.67 C
1941
5.4 C
+1.12 C
1942
4.8 C
+0.51 C
1943
4.6 C
+0.27 C
1944
5.7 C
+1.36 C
1946
4.6 C
+0.30 C
1947
4.4 C
+0.12 C
1949
3.9 C
-0.40 C
1950
1.6 C
-2.67 C
1951
2.7 C
-1.63 C
1952
5.1 C
+0.78 C
1953
5.0 C
+0.73 C
1954
4.8 C
+0.49 C
1956
3.3 C
-1.02 C
1958
4.8 C
+0.50 C
1959
3.0 C
-1.25 C
1961
5.0 C
+0.67 C
1962
3.8 C
-0.48 C
1963
5.6 C
+1.35 C
1964
4.4 C
+0.08 C
1965
3.0 C
-1.34 C
1967
4.0 C
-0.26 C
1968
4.5 C
+0.16 C
1970
3.4 C
-0.87 C
1971
4.1 C
-0.23 C
1974
3.2 C
-1.10 C
1976
5.1 C
+0.83 C
1977
5.7 C
+1.43 C
1978
4.2 C
-0.10 C
1979
3.1 C
-1.20 C
1980
5.4 C
+1.11 C
1982
3.8 C
-0.47 C
1983
5.6 C
+1.31 C
1984
5.3 C
+1.00 C
1985
3.6 C
-0.74 C
1987
7.7 C
+3.36 C
1988
6.0 C
+1.73 C
1989
4.0 C
-0.27 C
1991
6.0 C
+1.67 C
1992
5.1 C
+0.83 C
1993
4.2 C
-0.05 C
1994
5.0 C
+0.73 C
1995
4.5 C
+0.19 C
1996
2.8 C
-1.46 C
1998
7.0 C
+2.66 C
1999
6.8 C
+2.50 C
2003
5.5 C
+1.18 C
2004
4.8 C
+0.53 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1894 to 2004. In Fahrenheit: 0.3 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 80 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Grafton
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.3 F (0.2 to 0.5) per decade
1894 to 2004
80
Rise
Mean daily maximum
0.05 C (-0.04 to 0.15) per decade
0.1 F (-0.1 to 0.3) per decade
1894 to 2004
80
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.6 F (0.4 to 0.8) per decade
1894 to 2004
80
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
1893 to 2011
Yearly extremes at Grafton: 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)
1936
36.7 C (98.1 F)
115
Coldest night (TNn)
-43.9 C (-47.0 F)
1914
-35.6 C (-32.1 F)
115
Wettest day (Rx1day)
188.5 mm (7.4 in)
1957
43.1 mm (1.7 in)
118
Wettest five days (Rx5day)
224.7 mm (8.8 in)
2000
63.9 mm (2.5 in)
116
Longest dry spell (CDD)
89 days
1910
31 days
118
Hottest day (TXx)
The hottest day of the year at Grafton, 1893 to 2011. The record is 42.2 C (108.0 F) in 1936, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Grafton by year
Year
Hottest day (TXx)
1893
37.2 C (99.0 F)
1894
37.8 C (100.0 F)
1895
35.6 C (96.1 F)
1896
35.6 C (96.1 F)
1897
36.7 C (98.1 F)
1898
31.1 C (88.0 F)
1899
32.8 C (91.0 F)
1900
36.7 C (98.1 F)
1901
36.7 C (98.1 F)
1902
33.3 C (91.9 F)
1903
34.4 C (93.9 F)
1904
32.2 C (90.0 F)
1905
20.6 C (69.1 F)
1906
39.4 C (102.9 F)
1907
32.2 C (90.0 F)
1908
32.2 C (90.0 F)
1909
33.9 C (93.0 F)
1910
38.3 C (100.9 F)
1911
34.4 C (93.9 F)
1912
37.8 C (100.0 F)
1913
37.2 C (99.0 F)
1914
35.6 C (96.1 F)
1915
35.0 C (95.0 F)
1916
36.7 C (98.1 F)
1917
40.0 C (104.0 F)
1918
36.1 C (97.0 F)
1919
37.8 C (100.0 F)
1920
37.8 C (100.0 F)
1921
37.2 C (99.0 F)
1922
36.1 C (97.0 F)
1923
35.6 C (96.1 F)
1924
34.4 C (93.9 F)
1925
38.3 C (100.9 F)
1926
37.8 C (100.0 F)
1927
35.0 C (95.0 F)
1928
35.6 C (96.1 F)
1929
37.8 C (100.0 F)
1930
35.6 C (96.1 F)
1931
40.6 C (105.1 F)
1932
38.3 C (100.9 F)
1933
40.0 C (104.0 F)
1934
41.7 C (107.1 F)
1935
37.2 C (99.0 F)
1936
42.2 C (108.0 F)
1937
36.7 C (98.1 F)
1938
37.2 C (99.0 F)
1939
40.0 C (104.0 F)
1940
37.2 C (99.0 F)
1941
38.9 C (102.0 F)
1942
35.6 C (96.1 F)
1943
33.3 C (91.9 F)
1944
33.9 C (93.0 F)
1945
38.3 C (100.9 F)
1946
38.3 C (100.9 F)
1947
37.8 C (100.0 F)
1948
35.6 C (96.1 F)
1949
38.9 C (102.0 F)
1950
37.8 C (100.0 F)
1951
38.3 C (100.9 F)
1952
38.9 C (102.0 F)
1953
37.8 C (100.0 F)
1954
35.0 C (95.0 F)
1955
36.7 C (98.1 F)
1956
35.0 C (95.0 F)
1957
35.0 C (95.0 F)
1958
38.3 C (100.9 F)
1959
37.8 C (100.0 F)
1960
36.1 C (97.0 F)
1961
37.8 C (100.0 F)
1962
36.7 C (98.1 F)
1963
36.7 C (98.1 F)
1964
40.6 C (105.1 F)
1965
37.2 C (99.0 F)
1966
35.0 C (95.0 F)
1967
36.7 C (98.1 F)
1968
35.6 C (96.1 F)
1969
36.7 C (98.1 F)
1970
36.1 C (97.0 F)
1971
35.0 C (95.0 F)
1972
37.2 C (99.0 F)
1973
36.7 C (98.1 F)
1974
36.1 C (97.0 F)
1975
36.7 C (98.1 F)
1976
38.3 C (100.9 F)
1977
36.7 C (98.1 F)
1978
40.0 C (104.0 F)
1979
35.6 C (96.1 F)
1980
37.8 C (100.0 F)
1981
35.6 C (96.1 F)
1982
34.4 C (93.9 F)
1983
38.9 C (102.0 F)
1984
38.3 C (100.9 F)
1985
36.1 C (97.0 F)
1986
36.7 C (98.1 F)
1987
36.1 C (97.0 F)
1988
38.9 C (102.0 F)
1989
37.8 C (100.0 F)
1990
35.0 C (95.0 F)
1991
37.8 C (100.0 F)
1992
34.4 C (93.9 F)
1993
33.9 C (93.0 F)
1994
33.3 C (91.9 F)
1995
38.3 C (100.9 F)
1996
35.6 C (96.1 F)
1997
35.6 C (96.1 F)
1998
35.0 C (95.0 F)
1999
34.4 C (93.9 F)
2000
33.9 C (93.0 F)
2001
35.0 C (95.0 F)
2002
35.6 C (96.1 F)
2003
35.0 C (95.0 F)
2004
32.2 C (90.0 F)
2005
31.7 C (89.1 F)
2006
36.1 C (97.0 F)
2008
n/a
2009
n/a
2010
n/a
2011
11.1 C (52.0 F)
Coldest night (TNn)
The coldest night of the year at Grafton, 1893 to 2011. The record is -43.9 C (-47.0 F) in 1914, marked on the chart; the median year is -35.6 C (-32.1 F).
Coldest night (TNn) at Grafton by year
Year
Coldest night (TNn)
1893
-42.2 C (-44.0 F)
1894
-36.7 C (-34.1 F)
1895
-37.2 C (-35.0 F)
1896
-37.8 C (-36.0 F)
1897
-36.7 C (-34.1 F)
1898
-35.6 C (-32.1 F)
1899
-39.4 C (-38.9 F)
1900
-35.6 C (-32.1 F)
1901
-31.1 C (-24.0 F)
1902
-35.0 C (-31.0 F)
1903
-35.0 C (-31.0 F)
1904
-37.8 C (-36.0 F)
1905
-37.8 C (-36.0 F)
1906
-36.1 C (-33.0 F)
1907
-38.9 C (-38.0 F)
1908
-37.2 C (-35.0 F)
1909
-38.3 C (-36.9 F)
1910
-32.8 C (-27.0 F)
1911
-35.6 C (-32.1 F)
1912
-42.2 C (-44.0 F)
1913
-37.2 C (-35.0 F)
1914
-43.9 C (-47.0 F)
1915
-38.9 C (-38.0 F)
1916
-42.8 C (-45.0 F)
1917
-42.8 C (-45.0 F)
1918
-38.9 C (-38.0 F)
1919
-37.8 C (-36.0 F)
1920
-36.7 C (-34.1 F)
1921
-32.8 C (-27.0 F)
1922
-37.2 C (-35.0 F)
1923
-35.6 C (-32.1 F)
1924
-35.0 C (-31.0 F)
1925
-39.4 C (-38.9 F)
1926
-33.3 C (-27.9 F)
1927
-37.2 C (-35.0 F)
1928
-30.0 C (-22.0 F)
1929
-37.8 C (-36.0 F)
1930
-35.0 C (-31.0 F)
1931
-30.6 C (-23.1 F)
1932
-29.4 C (-20.9 F)
1933
-36.7 C (-34.1 F)
1934
-35.6 C (-32.1 F)
1935
-36.1 C (-33.0 F)
1936
-40.6 C (-41.1 F)
1937
-37.2 C (-35.0 F)
1938
-32.8 C (-27.0 F)
1939
-40.0 C (-40.0 F)
1940
-31.1 C (-24.0 F)
1941
-33.3 C (-27.9 F)
1942
-33.3 C (-27.9 F)
1943
-35.6 C (-32.1 F)
1944
-29.4 C (-20.9 F)
1945
-32.2 C (-26.0 F)
1946
-33.3 C (-27.9 F)
1947
-32.8 C (-27.0 F)
1948
-38.3 C (-36.9 F)
1949
-36.1 C (-33.0 F)
1950
-38.3 C (-36.9 F)
1951
-38.3 C (-36.9 F)
1952
-37.2 C (-35.0 F)
1953
-31.7 C (-25.1 F)
1954
-40.6 C (-41.1 F)
1955
-35.6 C (-32.1 F)
1956
-37.2 C (-35.0 F)
1957
-32.2 C (-26.0 F)
1958
-32.8 C (-27.0 F)
1959
-37.2 C (-35.0 F)
1960
-36.1 C (-33.0 F)
1961
-33.3 C (-27.9 F)
1962
-38.9 C (-38.0 F)
1963
-35.6 C (-32.1 F)
1964
-33.9 C (-29.0 F)
1965
-38.3 C (-36.9 F)
1966
-42.8 C (-45.0 F)
1967
-38.9 C (-38.0 F)
1968
-38.9 C (-38.0 F)
1969
-33.3 C (-27.9 F)
1970
-37.8 C (-36.0 F)
1971
-36.1 C (-33.0 F)
1972
-37.2 C (-35.0 F)
1973
-35.6 C (-32.1 F)
1974
-36.7 C (-34.1 F)
1975
-30.6 C (-23.1 F)
1976
-32.8 C (-27.0 F)
1977
-37.2 C (-35.0 F)
1978
-32.8 C (-27.0 F)
1979
-36.7 C (-34.1 F)
1980
-31.1 C (-24.0 F)
1981
-28.9 C (-20.0 F)
1982
-34.4 C (-29.9 F)
1983
-35.6 C (-32.1 F)
1984
-31.7 C (-25.1 F)
1985
-35.0 C (-31.0 F)
1986
-33.9 C (-29.0 F)
1987
-31.1 C (-24.0 F)
1988
-30.6 C (-23.1 F)
1989
-35.6 C (-32.1 F)
1990
-33.3 C (-27.9 F)
1991
-31.1 C (-24.0 F)
1992
-30.6 C (-23.1 F)
1993
-36.7 C (-34.1 F)
1994
-37.2 C (-35.0 F)
1995
-30.6 C (-23.1 F)
1996
-40.0 C (-40.0 F)
1997
-32.8 C (-27.0 F)
1998
-29.4 C (-20.9 F)
1999
-33.9 C (-29.0 F)
2000
-31.1 C (-24.0 F)
2001
-28.9 C (-20.0 F)
2002
-25.6 C (-14.1 F)
2003
-30.6 C (-23.1 F)
2004
-38.9 C (-38.0 F)
2005
-33.9 C (-29.0 F)
2006
-32.8 C (-27.0 F)
2008
n/a
2009
n/a
2010
n/a
2011
-28.3 C (-18.9 F)
Wettest day (Rx1day)
The wettest day of the year at Grafton, 1893 to 2011. The record is 188.5 mm (7.4 in) in 1957, marked on the chart; the median year is 43.1 mm (1.7 in).
Wettest day (Rx1day) at Grafton by year
Year
Wettest day (Rx1day)
1893
50.8 mm (2.0 in)
1894
38.1 mm (1.5 in)
1895
55.9 mm (2.2 in)
1896
88.9 mm (3.5 in)
1897
127.0 mm (5.0 in)
1898
50.8 mm (2.0 in)
1899
25.4 mm (1.0 in)
1900
69.9 mm (2.8 in)
1901
50.8 mm (2.0 in)
1902
38.1 mm (1.5 in)
1903
63.5 mm (2.5 in)
1904
66.0 mm (2.6 in)
1905
17.8 mm (0.7 in)
1906
25.9 mm (1.0 in)
1907
19.3 mm (0.8 in)
1908
43.9 mm (1.7 in)
1909
42.9 mm (1.7 in)
1910
47.0 mm (1.9 in)
1911
43.2 mm (1.7 in)
1912
27.2 mm (1.1 in)
1913
44.5 mm (1.8 in)
1914
57.2 mm (2.3 in)
1915
58.4 mm (2.3 in)
1916
29.5 mm (1.2 in)
1917
21.6 mm (0.9 in)
1918
36.8 mm (1.4 in)
1919
27.4 mm (1.1 in)
1920
31.5 mm (1.2 in)
1921
46.0 mm (1.8 in)
1922
69.9 mm (2.8 in)
1923
36.8 mm (1.4 in)
1924
44.5 mm (1.8 in)
1925
47.8 mm (1.9 in)
1926
43.7 mm (1.7 in)
1927
53.3 mm (2.1 in)
1928
37.6 mm (1.5 in)
1929
29.7 mm (1.2 in)
1930
47.0 mm (1.9 in)
1931
64.8 mm (2.6 in)
1932
59.7 mm (2.4 in)
1933
20.3 mm (0.8 in)
1934
33.0 mm (1.3 in)
1935
31.2 mm (1.2 in)
1936
49.8 mm (2.0 in)
1937
102.6 mm (4.0 in)
1938
31.5 mm (1.2 in)
1939
34.5 mm (1.4 in)
1940
34.3 mm (1.4 in)
1941
52.3 mm (2.1 in)
1942
70.4 mm (2.8 in)
1943
74.9 mm (2.9 in)
1944
65.8 mm (2.6 in)
1945
24.9 mm (1.0 in)
1946
64.5 mm (2.5 in)
1947
64.3 mm (2.5 in)
1948
74.2 mm (2.9 in)
1949
86.4 mm (3.4 in)
1950
65.0 mm (2.6 in)
1951
45.2 mm (1.8 in)
1952
39.9 mm (1.6 in)
1953
53.8 mm (2.1 in)
1954
41.1 mm (1.6 in)
1955
49.5 mm (1.9 in)
1956
94.0 mm (3.7 in)
1957
188.5 mm (7.4 in)
1958
25.7 mm (1.0 in)
1959
47.5 mm (1.9 in)
1960
36.6 mm (1.4 in)
1961
42.9 mm (1.7 in)
1962
27.9 mm (1.1 in)
1963
40.9 mm (1.6 in)
1964
42.7 mm (1.7 in)
1965
49.0 mm (1.9 in)
1966
42.4 mm (1.7 in)
1967
22.9 mm (0.9 in)
1968
36.8 mm (1.4 in)
1969
14.7 mm (0.6 in)
1970
20.3 mm (0.8 in)
1971
52.1 mm (2.1 in)
1972
41.1 mm (1.6 in)
1973
42.2 mm (1.7 in)
1974
102.9 mm (4.1 in)
1975
30.2 mm (1.2 in)
1976
40.1 mm (1.6 in)
1977
33.0 mm (1.3 in)
1978
62.2 mm (2.4 in)
1979
34.3 mm (1.4 in)
1980
43.9 mm (1.7 in)
1981
41.1 mm (1.6 in)
1982
25.4 mm (1.0 in)
1983
39.4 mm (1.6 in)
1984
52.3 mm (2.1 in)
1985
38.4 mm (1.5 in)
1986
37.1 mm (1.5 in)
1987
40.6 mm (1.6 in)
1988
39.9 mm (1.6 in)
1989
44.5 mm (1.8 in)
1990
30.2 mm (1.2 in)
1991
81.8 mm (3.2 in)
1992
33.0 mm (1.3 in)
1993
110.5 mm (4.4 in)
1994
35.6 mm (1.4 in)
1995
29.2 mm (1.1 in)
1996
73.7 mm (2.9 in)
1997
40.6 mm (1.6 in)
1998
66.3 mm (2.6 in)
1999
37.8 mm (1.5 in)
2000
121.7 mm (4.8 in)
2001
67.3 mm (2.6 in)
2002
90.2 mm (3.6 in)
2003
30.5 mm (1.2 in)
2004
39.4 mm (1.6 in)
2005
44.5 mm (1.8 in)
2006
38.1 mm (1.5 in)
2008
63.5 mm (2.5 in)
2009
88.9 mm (3.5 in)
2010
50.8 mm (2.0 in)
2011
0.0 mm (0.00 in)
Wettest five days (Rx5day)
The wettest five days of the year at Grafton, 1893 to 2011. The record is 224.7 mm (8.8 in) in 2000, marked on the chart; the median year is 63.9 mm (2.5 in).
Wettest five days (Rx5day) at Grafton by year
Year
Wettest five days (Rx5day)
1893
50.8 mm (2.0 in)
1894
27.9 mm (1.1 in)
1895
66.1 mm (2.6 in)
1896
113.0 mm (4.4 in)
1897
127.0 mm (5.0 in)
1898
62.5 mm (2.5 in)
1899
40.7 mm (1.6 in)
1900
95.6 mm (3.8 in)
1901
71.1 mm (2.8 in)
1902
50.9 mm (2.0 in)
1903
69.9 mm (2.8 in)
1904
73.7 mm (2.9 in)
1905
22.9 mm (0.9 in)
1906
42.7 mm (1.7 in)
1907
31.2 mm (1.2 in)
1908
51.0 mm (2.0 in)
1909
66.6 mm (2.6 in)
1910
48.2 mm (1.9 in)
1911
67.8 mm (2.7 in)
1912
33.1 mm (1.3 in)
1913
46.3 mm (1.8 in)
1914
87.1 mm (3.4 in)
1915
76.5 mm (3.0 in)
1916
42.7 mm (1.7 in)
1917
20.9 mm (0.8 in)
1918
40.9 mm (1.6 in)
1919
30.5 mm (1.2 in)
1920
73.6 mm (2.9 in)
1921
49.0 mm (1.9 in)
1922
53.2 mm (2.1 in)
1923
n/a
1924
10.9 mm (0.4 in)
1925
51.2 mm (2.0 in)
1926
17.8 mm (0.7 in)
1927
83.5 mm (3.3 in)
1928
65.0 mm (2.6 in)
1929
28.2 mm (1.1 in)
1930
67.6 mm (2.7 in)
1931
n/a
1932
61.3 mm (2.4 in)
1933
31.6 mm (1.2 in)
1934
64.0 mm (2.5 in)
1935
44.1 mm (1.7 in)
1936
74.0 mm (2.9 in)
1937
108.3 mm (4.3 in)
1938
35.0 mm (1.4 in)
1939
34.5 mm (1.4 in)
1940
67.8 mm (2.7 in)
1941
73.7 mm (2.9 in)
1942
83.6 mm (3.3 in)
1943
103.3 mm (4.1 in)
1944
120.9 mm (4.8 in)
1945
32.8 mm (1.3 in)
1946
111.8 mm (4.4 in)
1947
47.0 mm (1.9 in)
1948
105.9 mm (4.2 in)
1949
89.5 mm (3.5 in)
1950
85.0 mm (3.3 in)
1951
65.1 mm (2.6 in)
1952
59.7 mm (2.4 in)
1953
64.5 mm (2.5 in)
1954
66.7 mm (2.6 in)
1955
87.4 mm (3.4 in)
1956
103.6 mm (4.1 in)
1957
208.6 mm (8.2 in)
1958
54.4 mm (2.1 in)
1959
60.0 mm (2.4 in)
1960
73.4 mm (2.9 in)
1961
58.4 mm (2.3 in)
1962
48.8 mm (1.9 in)
1963
80.3 mm (3.2 in)
1964
97.3 mm (3.8 in)
1965
67.6 mm (2.7 in)
1966
46.3 mm (1.8 in)
1967
46.6 mm (1.8 in)
1968
52.3 mm (2.1 in)
1969
29.2 mm (1.1 in)
1970
50.5 mm (2.0 in)
1971
70.9 mm (2.8 in)
1972
43.4 mm (1.7 in)
1973
65.3 mm (2.6 in)
1974
115.6 mm (4.6 in)
1975
52.1 mm (2.1 in)
1976
40.1 mm (1.6 in)
1977
58.9 mm (2.3 in)
1978
87.6 mm (3.4 in)
1979
44.4 mm (1.7 in)
1980
64.8 mm (2.6 in)
1981
63.7 mm (2.5 in)
1982
69.8 mm (2.7 in)
1983
48.8 mm (1.9 in)
1984
75.9 mm (3.0 in)
1985
51.5 mm (2.0 in)
1986
65.8 mm (2.6 in)
1987
83.7 mm (3.3 in)
1988
69.1 mm (2.7 in)
1989
57.4 mm (2.3 in)
1990
31.7 mm (1.2 in)
1991
92.0 mm (3.6 in)
1992
54.7 mm (2.2 in)
1993
149.8 mm (5.9 in)
1994
50.9 mm (2.0 in)
1995
38.1 mm (1.5 in)
1996
89.0 mm (3.5 in)
1997
73.7 mm (2.9 in)
1998
68.6 mm (2.7 in)
1999
54.9 mm (2.2 in)
2000
224.7 mm (8.8 in)
2001
101.6 mm (4.0 in)
2002
110.8 mm (4.4 in)
2003
31.8 mm (1.3 in)
2004
55.6 mm (2.2 in)
2005
48.3 mm (1.9 in)
2006
50.8 mm (2.0 in)
2008
94.7 mm (3.7 in)
2009
175.3 mm (6.9 in)
2010
75.6 mm (3.0 in)
2011
0.0 mm (0.00 in)
Longest dry spell (CDD)
The longest dry spell of the year at Grafton, 1893 to 2011. The record is 89 days in 1910, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Grafton by year
Year
Longest dry spell (CDD)
1893
22 days
1894
24 days
1895
28 days
1896
59 days
1897
46 days
1898
40 days
1899
40 days
1900
36 days
1901
37 days
1902
26 days
1903
46 days
1904
30 days
1905
38 days
1906
80 days
1907
55 days
1908
25 days
1909
28 days
1910
89 days
1911
38 days
1912
37 days
1913
29 days
1914
31 days
1915
26 days
1916
36 days
1917
41 days
1918
28 days
1919
25 days
1920
34 days
1921
18 days
1922
23 days
1923
1 day
1924
18 days
1925
1 day
1926
13 days
1927
20 days
1928
23 days
1929
2 days
1930
22 days
1931
3 days
1932
21 days
1933
36 days
1934
40 days
1935
39 days
1936
23 days
1937
50 days
1938
40 days
1939
28 days
1940
24 days
1941
23 days
1942
30 days
1943
31 days
1944
35 days
1945
30 days
1946
21 days
1947
23 days
1948
46 days
1949
28 days
1950
28 days
1951
21 days
1952
47 days
1953
29 days
1954
35 days
1955
15 days
1956
33 days
1957
32 days
1958
31 days
1959
32 days
1960
39 days
1961
51 days
1962
44 days
1963
31 days
1964
30 days
1965
43 days
1966
21 days
1967
47 days
1968
36 days
1969
37 days
1970
18 days
1971
27 days
1972
27 days
1973
35 days
1974
50 days
1975
26 days
1976
58 days
1977
31 days
1978
31 days
1979
34 days
1980
60 days
1981
24 days
1982
20 days
1983
38 days
1984
23 days
1985
19 days
1986
22 days
1987
53 days
1988
43 days
1989
35 days
1990
47 days
1991
43 days
1992
33 days
1993
45 days
1994
23 days
1995
21 days
1996
23 days
1997
32 days
1998
28 days
1999
56 days
2000
44 days
2001
31 days
2002
27 days
2003
48 days
2004
27 days
2005
28 days
2006
17 days
2008
20 days
2009
24 days
2010
15 days
2011
7 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
80 years with a frost
Across 80 years with a frost, the median last spring frost at Grafton falls on 16 May and the median first autumn frost on 22 September, which leaves a median of 125 days between them.
In 1963 to 2004 the median growing season was 141 days. That is 26 days more than in 1894 to 1937.
Fitted over all years, the growing season changes by +4.1 days per decade at this station.
Frost dates and growing season at Grafton
Measure
Median, all years
Earliest period (1894 to 1937)
Recent period (1963 to 2004)
Recent against earliest
Fitted trend
Last spring frost
16 May
20 May
10 May
10 days earlier
-2.4 days per decade
First autumn frost
22 September
13 September
27 September
14 days later
+1.7 days per decade
Growing days
125 days
115 days
141 days
26 days more
+4.1 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
77 years, 1895 to 2009
A day with at least 44.1 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 169.5 mm (6.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Grafton: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
44.1 mm (1.7 in)
5 years
66.9 mm (2.6 in)
10 years
85.6 mm (3.4 in)
25 years
114.2 mm (4.5 in)
50 years
139.7 mm (5.5 in)
100 years
169.5 mm (6.7 in)
Longer than the 77 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, 77 years of values from 1895 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: 188.5 mm (7.4 in) in 1957; 127.0 mm (5.0 in) in 1897; 121.7 mm (4.8 in) in 2000.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Grafton standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grafton 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.