Record envelope, standing records and threshold days for Grafton (USC00273530), New Hampshire, United States, with 121 years of record.
Key Facts for Grafton
Grafton (USC00273530) is a weather station in New Hampshire, United States at 43.57 latitude and -71.95 longitude, 253 m (830 ft) above sea level.
The station reports from 1884 to 2004, 121 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 monthly record low maximum temperature of 8.3 C (46.9 F) on 1 June 2004.
About the Station
Location: New Hampshire, United States, 43.57 latitude, -71.95 longitude.
Elevation: 253 m (830 ft).
Period of record: 1884 to 2004, 121 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
15.6 C (60.1 F)
-40.0 C (-40.0 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-31.7 C (-25.1 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-21.1 C (-6.0 F)
n/a
n/a
May
35.0 C (95.0 F)
-10.0 C (14.0 F)
n/a
n/a
Jun
37.2 C (99.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
37.2 C (99.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
36.1 C (97.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-8.9 C (16.0 F)
n/a
n/a
Oct
30.0 C (86.0 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-21.1 C (-6.0 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Grafton still stand. 1894 holds the most, with 39.
Standing records at Grafton by the year they were set
Year set
Standing records
1893
17
1894
39
1895
26
1896
18
1897
18
1898
7
1899
27
1900
26
1901
30
1902
30
1903
35
1904
24
1905
13
1906
23
1907
10
1908
24
1909
15
1910
18
1911
33
1912
18
1913
28
1914
33
1915
20
1916
25
1917
15
1918
5
1955
13
1956
37
1957
19
1958
18
1959
17
1960
8
1961
24
1962
19
1963
30
1964
25
1965
20
1966
17
1967
25
1968
13
1969
14
1970
14
1971
22
1972
20
1973
8
1974
3
1975
8
1976
21
1977
22
1978
19
1979
39
1980
15
1981
19
1982
23
1983
13
1984
22
1985
12
1986
14
1987
21
1988
15
1989
18
1990
24
1991
15
1992
14
1993
14
1994
21
1995
16
1996
14
1997
10
1998
15
1999
13
2000
10
2001
16
2002
30
2003
27
2004
1
All-Time Record Progression
5 new records
5 all-time records were set at Grafton between 15 June 1942 and 20 January 1994. Each dot is a new record.
When Grafton set new all-time records
Date
Kind
Detail
1942-06-15
Record daily precipitation
Record daily precipitation 114.3 mm (4.5 in)
1959-10-24
Record daily precipitation
Record daily precipitation 126.5 mm (5.0 in)
1981-01-04
Record low maximum temperature
Record low maximum temperature -22.2 C (-8.0 F)
1994-01-18
Record daily snowfall
Record daily snowfall 61.0 cm (24.0 in)
1994-01-20
Record low minimum temperature
Record low minimum temperature -40.0 C (-40.0 F)
Wettest Day of Each Month
Oct: 126.5 mm (5.0 in)
The wettest day on record for each calendar month at Grafton. The most was 126.5 mm (5.0 in) on 24 October 1959.
Record daily precipitation for each month at Grafton
Month
Record daily precipitation (mm)
Date
Jan
62.0 mm (2.4 in)
26 January 1986
Feb
57.2 mm (2.3 in)
13 February 1900
Mar
66.8 mm (2.6 in)
1 March 1900
Apr
69.9 mm (2.8 in)
10 April 1980
May
59.2 mm (2.3 in)
29 May 1984
Jun
114.3 mm (4.5 in)
15 June 1942
Jul
84.1 mm (3.3 in)
12 July 1976
Aug
92.2 mm (3.6 in)
30 August 1959
Sep
115.1 mm (4.5 in)
17 September 1999
Oct
126.5 mm (5.0 in)
24 October 1959
Nov
67.1 mm (2.6 in)
2 November 1997
Dec
84.1 mm (3.3 in)
27 December 1969
Period of Record Coverage
1893 to 2004
Complete yearUnder 90 percent of days
76 years of record at Grafton, 1893 to 2004. 14 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1898, 1906, 1913, 1917, 1918 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 61 complete years at Grafton, 1896 to 2002. Blue stripes are years cooler than the station's own mean of 5.7 C (42.3 F); red stripes are warmer. The coolest year was 1904, at 4.4 C (40.0 F), and the warmest was 1990, at 7.2 C (45.0 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Grafton as warming stripes, 1896 to 2002
Year
Annual mean temperature
Difference from the station mean
1896
5.9 C
+0.14 C
1897
6.1 C
+0.43 C
1899
5.4 C
-0.30 C
1900
5.9 C
+0.20 C
1901
5.7 C
+0.01 C
1902
6.0 C
+0.24 C
1903
5.8 C
+0.06 C
1904
4.4 C
-1.29 C
1905
5.3 C
-0.46 C
1908
6.1 C
+0.40 C
1909
5.9 C
+0.16 C
1910
6.1 C
+0.39 C
1911
5.9 C
+0.23 C
1912
5.4 C
-0.32 C
1914
4.9 C
-0.78 C
1915
6.6 C
+0.84 C
1916
5.5 C
-0.23 C
1956
5.3 C
-0.46 C
1957
6.3 C
+0.59 C
1958
5.3 C
-0.42 C
1959
6.4 C
+0.73 C
1960
5.9 C
+0.14 C
1961
6.0 C
+0.31 C
1962
5.0 C
-0.75 C
1963
5.3 C
-0.39 C
1964
5.6 C
-0.13 C
1965
5.3 C
-0.44 C
1966
5.5 C
-0.18 C
1967
5.1 C
-0.57 C
1968
5.4 C
-0.32 C
1969
6.0 C
+0.31 C
1970
5.8 C
+0.07 C
1971
5.4 C
-0.31 C
1972
5.1 C
-0.64 C
1976
5.4 C
-0.28 C
1977
5.9 C
+0.16 C
1978
4.8 C
-0.95 C
1979
6.3 C
+0.57 C
1980
5.2 C
-0.55 C
1981
6.3 C
+0.56 C
1982
5.3 C
-0.46 C
1983
6.4 C
+0.69 C
1984
6.4 C
+0.72 C
1985
5.8 C
+0.05 C
1986
5.9 C
+0.15 C
1987
6.1 C
+0.43 C
1988
5.4 C
-0.32 C
1989
5.1 C
-0.59 C
1990
7.2 C
+1.49 C
1991
6.5 C
+0.82 C
1992
4.7 C
-1.00 C
1993
5.1 C
-0.63 C
1994
5.1 C
-0.59 C
1995
5.4 C
-0.29 C
1996
5.5 C
-0.25 C
1997
4.8 C
-0.90 C
1998
7.1 C
+1.38 C
1999
6.6 C
+0.90 C
2000
5.6 C
-0.15 C
2001
6.5 C
+0.77 C
2002
6.5 C
+0.81 C
The fitted trend in annual mean temperature here over 1896 to 2002 is 0.01 C (-0.03 to 0.06) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.02 F (-0.06 to 0.10) per decade. The slope is a straight line fitted to 61 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
0.01 C (-0.03 to 0.06) per decade
0.02 F (-0.06 to 0.10) per decade
1896 to 2002
61
Not clearly different from zero
Mean daily maximum
0.04 C (-0.01 to 0.09) per decade
0.07 F (-0.01 to 0.15) per decade
1896 to 2002
61
Not clearly different from zero
Mean daily minimum
-0.01 C (-0.07 to 0.04) per decade
-0.03 F (-0.12 to 0.07) per decade
1896 to 2002
61
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
1884 to 2004
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)
37.2 C (99.0 F)
1901
33.6 C (92.5 F)
76
Coldest night (TNn)
-40.0 C (-40.0 F)
1994
-30.8 C (-23.5 F)
76
Wettest day (Rx1day)
126.5 mm (5.0 in)
1959
52.6 mm (2.1 in)
87
Wettest five days (Rx5day)
175.7 mm (6.9 in)
1990
81.2 mm (3.2 in)
87
Longest dry spell (CDD)
35 days
1915
18 days
87
Hottest day (TXx)
The hottest day of the year at Grafton, 1884 to 2004. The record is 37.2 C (99.0 F) in 1901, marked on the chart; the median year is 33.6 C (92.5 F).
Hottest day (TXx) at Grafton by year
Year
Hottest day (TXx)
1884
n/a
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1892
n/a
1893
35.0 C (95.0 F)
1894
35.0 C (95.0 F)
1895
35.0 C (95.0 F)
1896
33.9 C (93.0 F)
1897
35.6 C (96.1 F)
1898
26.1 C (79.0 F)
1899
35.0 C (95.0 F)
1900
35.0 C (95.0 F)
1901
37.2 C (99.0 F)
1902
31.7 C (89.1 F)
1903
33.3 C (91.9 F)
1904
35.6 C (96.1 F)
1905
32.2 C (90.0 F)
1906
33.3 C (91.9 F)
1907
33.9 C (93.0 F)
1908
35.0 C (95.0 F)
1909
33.9 C (93.0 F)
1910
35.6 C (96.1 F)
1911
37.2 C (99.0 F)
1912
35.6 C (96.1 F)
1913
35.0 C (95.0 F)
1914
32.2 C (90.0 F)
1915
32.8 C (91.0 F)
1916
33.3 C (91.9 F)
1917
36.1 C (97.0 F)
1918
29.4 C (84.9 F)
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1955
35.6 C (96.1 F)
1956
33.9 C (93.0 F)
1957
32.8 C (91.0 F)
1958
32.2 C (90.0 F)
1959
33.9 C (93.0 F)
1960
31.7 C (89.1 F)
1961
32.2 C (90.0 F)
1962
33.9 C (93.0 F)
1963
35.6 C (96.1 F)
1964
33.3 C (91.9 F)
1965
35.0 C (95.0 F)
1966
34.4 C (93.9 F)
1967
31.7 C (89.1 F)
1968
32.8 C (91.0 F)
1969
32.8 C (91.0 F)
1970
33.3 C (91.9 F)
1971
33.3 C (91.9 F)
1972
31.7 C (89.1 F)
1973
33.3 C (91.9 F)
1974
13.9 C (57.0 F)
1975
36.1 C (97.0 F)
1976
33.3 C (91.9 F)
1977
34.4 C (93.9 F)
1978
33.3 C (91.9 F)
1979
32.8 C (91.0 F)
1980
32.2 C (90.0 F)
1981
33.3 C (91.9 F)
1982
33.9 C (93.0 F)
1983
35.0 C (95.0 F)
1984
33.9 C (93.0 F)
1985
32.2 C (90.0 F)
1986
32.2 C (90.0 F)
1987
35.0 C (95.0 F)
1988
34.4 C (93.9 F)
1989
32.2 C (90.0 F)
1990
31.7 C (89.1 F)
1991
35.0 C (95.0 F)
1992
31.7 C (89.1 F)
1993
32.8 C (91.0 F)
1994
33.9 C (93.0 F)
1995
35.0 C (95.0 F)
1996
31.1 C (88.0 F)
1997
31.7 C (89.1 F)
1998
32.8 C (91.0 F)
1999
34.4 C (93.9 F)
2000
31.1 C (88.0 F)
2001
35.0 C (95.0 F)
2002
36.1 C (97.0 F)
2003
35.0 C (95.0 F)
2004
30.6 C (87.1 F)
Coldest night (TNn)
The coldest night of the year at Grafton, 1884 to 2004. The record is -40.0 C (-40.0 F) in 1994, marked on the chart; the median year is -30.8 C (-23.5 F).
Coldest night (TNn) at Grafton by year
Year
Coldest night (TNn)
1884
n/a
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1892
n/a
1893
-25.6 C (-14.1 F)
1894
-27.8 C (-18.0 F)
1895
-28.9 C (-20.0 F)
1896
-32.8 C (-27.0 F)
1897
-28.9 C (-20.0 F)
1898
-36.1 C (-33.0 F)
1899
-30.6 C (-23.1 F)
1900
-33.9 C (-29.0 F)
1901
-30.6 C (-23.1 F)
1902
-28.3 C (-18.9 F)
1903
-36.1 C (-33.0 F)
1904
-35.0 C (-31.0 F)
1905
-33.3 C (-27.9 F)
1906
-27.8 C (-18.0 F)
1907
-28.9 C (-20.0 F)
1908
-30.0 C (-22.0 F)
1909
-30.0 C (-22.0 F)
1910
-30.0 C (-22.0 F)
1911
-28.9 C (-20.0 F)
1912
-33.3 C (-27.9 F)
1913
-26.7 C (-16.1 F)
1914
-34.4 C (-29.9 F)
1915
-30.6 C (-23.1 F)
1916
-28.9 C (-20.0 F)
1917
-27.8 C (-18.0 F)
1918
-1.7 C (28.9 F)
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1955
-26.7 C (-16.1 F)
1956
-30.6 C (-23.1 F)
1957
-38.3 C (-36.9 F)
1958
-32.2 C (-26.0 F)
1959
-28.9 C (-20.0 F)
1960
-32.8 C (-27.0 F)
1961
-36.1 C (-33.0 F)
1962
-33.3 C (-27.9 F)
1963
-35.0 C (-31.0 F)
1964
-32.2 C (-26.0 F)
1965
-33.9 C (-29.0 F)
1966
-31.7 C (-25.1 F)
1967
-35.6 C (-32.1 F)
1968
-31.1 C (-24.0 F)
1969
-30.6 C (-23.1 F)
1970
-31.7 C (-25.1 F)
1971
-37.8 C (-36.0 F)
1972
-31.7 C (-25.1 F)
1973
-31.7 C (-25.1 F)
1974
-30.6 C (-23.1 F)
1975
-27.8 C (-18.0 F)
1976
-35.6 C (-32.1 F)
1977
-32.2 C (-26.0 F)
1978
-30.6 C (-23.1 F)
1979
-35.6 C (-32.1 F)
1980
-33.9 C (-29.0 F)
1981
-34.4 C (-29.9 F)
1982
-34.4 C (-29.9 F)
1983
-27.8 C (-18.0 F)
1984
-36.1 C (-33.0 F)
1985
-33.3 C (-27.9 F)
1986
-31.7 C (-25.1 F)
1987
-31.1 C (-24.0 F)
1988
-33.3 C (-27.9 F)
1989
-30.0 C (-22.0 F)
1990
-27.2 C (-17.0 F)
1991
-26.7 C (-16.1 F)
1992
-27.2 C (-17.0 F)
1993
-35.0 C (-31.0 F)
1994
-40.0 C (-40.0 F)
1995
-29.4 C (-20.9 F)
1996
-31.7 C (-25.1 F)
1997
-30.0 C (-22.0 F)
1998
-26.1 C (-15.0 F)
1999
-27.8 C (-18.0 F)
2000
-27.8 C (-18.0 F)
2001
-22.8 C (-9.0 F)
2002
-24.4 C (-11.9 F)
2003
-34.4 C (-29.9 F)
2004
-2.8 C (27.0 F)
Wettest day (Rx1day)
The wettest day of the year at Grafton, 1884 to 2004. The record is 126.5 mm (5.0 in) in 1959, marked on the chart; the median year is 52.6 mm (2.1 in).
Wettest day (Rx1day) at Grafton by year
Year
Wettest day (Rx1day)
1884
36.8 mm (1.4 in)
1885
21.6 mm (0.9 in)
1886
35.6 mm (1.4 in)
1887
43.2 mm (1.7 in)
1888
63.5 mm (2.5 in)
1892
64.3 mm (2.5 in)
1893
59.7 mm (2.4 in)
1894
59.7 mm (2.4 in)
1895
65.3 mm (2.6 in)
1896
76.2 mm (3.0 in)
1897
68.6 mm (2.7 in)
1898
50.8 mm (2.0 in)
1899
43.2 mm (1.7 in)
1900
66.8 mm (2.6 in)
1901
64.0 mm (2.5 in)
1902
49.5 mm (1.9 in)
1903
48.3 mm (1.9 in)
1904
71.1 mm (2.8 in)
1905
80.0 mm (3.1 in)
1906
63.5 mm (2.5 in)
1907
41.9 mm (1.6 in)
1908
45.7 mm (1.8 in)
1909
45.7 mm (1.8 in)
1910
41.9 mm (1.6 in)
1911
31.8 mm (1.3 in)
1912
45.7 mm (1.8 in)
1913
56.6 mm (2.2 in)
1914
41.4 mm (1.6 in)
1915
66.0 mm (2.6 in)
1916
56.1 mm (2.2 in)
1917
44.5 mm (1.8 in)
1918
43.2 mm (1.7 in)
1938
33.5 mm (1.3 in)
1939
50.8 mm (2.0 in)
1940
47.2 mm (1.9 in)
1941
57.2 mm (2.3 in)
1942
114.3 mm (4.5 in)
1955
58.7 mm (2.3 in)
1956
61.0 mm (2.4 in)
1957
34.3 mm (1.4 in)
1958
39.6 mm (1.6 in)
1959
126.5 mm (5.0 in)
1960
76.7 mm (3.0 in)
1961
43.2 mm (1.7 in)
1962
63.8 mm (2.5 in)
1963
58.2 mm (2.3 in)
1964
46.5 mm (1.8 in)
1965
47.5 mm (1.9 in)
1966
87.9 mm (3.5 in)
1967
46.0 mm (1.8 in)
1968
47.0 mm (1.9 in)
1969
84.1 mm (3.3 in)
1970
43.9 mm (1.7 in)
1971
53.3 mm (2.1 in)
1972
50.5 mm (2.0 in)
1973
84.3 mm (3.3 in)
1974
13.5 mm (0.5 in)
1975
48.3 mm (1.9 in)
1976
84.1 mm (3.3 in)
1977
53.8 mm (2.1 in)
1978
42.9 mm (1.7 in)
1979
45.7 mm (1.8 in)
1980
69.9 mm (2.8 in)
1981
54.4 mm (2.1 in)
1982
36.8 mm (1.4 in)
1983
66.8 mm (2.6 in)
1984
64.3 mm (2.5 in)
1985
75.7 mm (3.0 in)
1986
62.0 mm (2.4 in)
1987
68.6 mm (2.7 in)
1988
48.0 mm (1.9 in)
1989
46.7 mm (1.8 in)
1990
91.4 mm (3.6 in)
1991
65.3 mm (2.6 in)
1992
29.0 mm (1.1 in)
1993
38.4 mm (1.5 in)
1994
46.7 mm (1.8 in)
1995
77.7 mm (3.1 in)
1996
123.2 mm (4.9 in)
1997
67.1 mm (2.6 in)
1998
52.6 mm (2.1 in)
1999
115.1 mm (4.5 in)
2000
48.3 mm (1.9 in)
2001
44.2 mm (1.7 in)
2002
34.3 mm (1.4 in)
2003
59.7 mm (2.4 in)
2004
10.9 mm (0.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Grafton, 1884 to 2004. The record is 175.7 mm (6.9 in) in 1990, marked on the chart; the median year is 81.2 mm (3.2 in).
Wettest five days (Rx5day) at Grafton by year
Year
Wettest five days (Rx5day)
1884
59.9 mm (2.4 in)
1885
49.5 mm (1.9 in)
1886
74.0 mm (2.9 in)
1887
73.4 mm (2.9 in)
1888
127.0 mm (5.0 in)
1892
96.3 mm (3.8 in)
1893
82.6 mm (3.3 in)
1894
67.3 mm (2.6 in)
1895
83.1 mm (3.3 in)
1896
81.3 mm (3.2 in)
1897
120.6 mm (4.7 in)
1898
50.5 mm (2.0 in)
1899
72.6 mm (2.9 in)
1900
99.8 mm (3.9 in)
1901
101.6 mm (4.0 in)
1902
81.2 mm (3.2 in)
1903
100.6 mm (4.0 in)
1904
75.7 mm (3.0 in)
1905
107.1 mm (4.2 in)
1906
102.0 mm (4.0 in)
1907
82.5 mm (3.2 in)
1908
79.6 mm (3.1 in)
1909
75.9 mm (3.0 in)
1910
54.6 mm (2.1 in)
1911
58.4 mm (2.3 in)
1912
83.8 mm (3.3 in)
1913
67.3 mm (2.6 in)
1914
77.2 mm (3.0 in)
1915
117.8 mm (4.6 in)
1916
63.5 mm (2.5 in)
1917
62.3 mm (2.5 in)
1918
43.2 mm (1.7 in)
1938
74.4 mm (2.9 in)
1939
65.0 mm (2.6 in)
1940
67.3 mm (2.6 in)
1941
57.7 mm (2.3 in)
1942
131.6 mm (5.2 in)
1955
126.0 mm (5.0 in)
1956
75.2 mm (3.0 in)
1957
59.3 mm (2.3 in)
1958
55.6 mm (2.2 in)
1959
154.4 mm (6.1 in)
1960
98.5 mm (3.9 in)
1961
84.8 mm (3.3 in)
1962
149.7 mm (5.9 in)
1963
122.7 mm (4.8 in)
1964
66.8 mm (2.6 in)
1965
51.6 mm (2.0 in)
1966
122.9 mm (4.8 in)
1967
64.8 mm (2.6 in)
1968
79.5 mm (3.1 in)
1969
110.7 mm (4.4 in)
1970
58.9 mm (2.3 in)
1971
69.8 mm (2.7 in)
1972
79.5 mm (3.1 in)
1973
139.2 mm (5.5 in)
1974
21.6 mm (0.9 in)
1975
124.1 mm (4.9 in)
1976
90.1 mm (3.5 in)
1977
78.5 mm (3.1 in)
1978
65.8 mm (2.6 in)
1979
101.4 mm (4.0 in)
1980
87.7 mm (3.5 in)
1981
94.2 mm (3.7 in)
1982
50.8 mm (2.0 in)
1983
82.6 mm (3.3 in)
1984
141.1 mm (5.6 in)
1985
80.8 mm (3.2 in)
1986
107.7 mm (4.2 in)
1987
94.3 mm (3.7 in)
1988
82.6 mm (3.3 in)
1989
88.9 mm (3.5 in)
1990
175.7 mm (6.9 in)
1991
92.3 mm (3.6 in)
1992
48.7 mm (1.9 in)
1993
87.9 mm (3.5 in)
1994
80.0 mm (3.1 in)
1995
84.6 mm (3.3 in)
1996
153.2 mm (6.0 in)
1997
100.4 mm (4.0 in)
1998
127.5 mm (5.0 in)
1999
135.2 mm (5.3 in)
2000
78.7 mm (3.1 in)
2001
59.7 mm (2.4 in)
2002
44.0 mm (1.7 in)
2003
79.2 mm (3.1 in)
2004
23.1 mm (0.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Grafton, 1884 to 2004. The record is 35 days in 1915, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Grafton by year
Year
Longest dry spell (CDD)
1884
7 days
1885
6 days
1886
18 days
1887
16 days
1888
8 days
1892
28 days
1893
16 days
1894
16 days
1895
21 days
1896
26 days
1897
12 days
1898
23 days
1899
17 days
1900
22 days
1901
27 days
1902
13 days
1903
24 days
1904
20 days
1905
24 days
1906
17 days
1907
14 days
1908
26 days
1909
13 days
1910
15 days
1911
17 days
1912
24 days
1913
14 days
1914
22 days
1915
35 days
1916
18 days
1917
28 days
1918
19 days
1938
19 days
1939
25 days
1940
22 days
1941
29 days
1942
20 days
1955
23 days
1956
24 days
1957
17 days
1958
14 days
1959
14 days
1960
13 days
1961
13 days
1962
14 days
1963
24 days
1964
16 days
1965
19 days
1966
13 days
1967
12 days
1968
18 days
1969
16 days
1970
17 days
1971
17 days
1972
15 days
1973
16 days
1974
8 days
1975
13 days
1976
20 days
1977
19 days
1978
17 days
1979
19 days
1980
23 days
1981
17 days
1982
20 days
1983
15 days
1984
16 days
1985
18 days
1986
13 days
1987
19 days
1988
22 days
1989
15 days
1990
15 days
1991
12 days
1992
15 days
1993
15 days
1994
21 days
1995
18 days
1996
34 days
1997
21 days
1998
18 days
1999
15 days
2000
19 days
2001
30 days
2002
27 days
2003
22 days
2004
8 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
61 years with a frost
Across 61 years with a frost, the median last spring frost at Grafton falls on 6 June and the median first autumn frost on 3 September, which leaves a median of 90 days between them.
In 1970 to 2002 the median growing season was 91 days. That is 1 day more than in 1896 to 1968.
Fitted over all years, the growing season changes by +0.1 days per decade at this station.
Frost dates and growing season at Grafton
Measure
Median, all years
Earliest period (1896 to 1968)
Recent period (1970 to 2002)
Recent against earliest
Fitted trend
Last spring frost
6 June
6 June
6 June
no change
-0.2 days per decade
First autumn frost
3 September
3 September
6 September
3 days later
-0.2 days per decade
Growing days
90 days
90 days
91 days
1 day more
+0.1 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
69 years, 1893 to 2003
A day with at least 54.3 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 129.2 mm (5.1 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
54.3 mm (2.1 in)
5 years
71.0 mm (2.8 in)
10 years
83.3 mm (3.3 in)
25 years
100.4 mm (4.0 in)
50 years
114.3 mm (4.5 in)
100 years
129.2 mm (5.1 in)
Longer than the 69 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, 69 years of values from 1893 to 2003.
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: 126.5 mm (5.0 in) in 1959; 123.2 mm (4.9 in) in 1996; 115.1 mm (4.5 in) in 1999.
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.