Record envelope, standing records and threshold days for Grafton 1 NE (USC00463630), West Virginia, United States, with 97 years of record.
Key Facts for Grafton 1 NE
Grafton 1 NE (USC00463630) is a weather station in West Virginia, United States at 39.35 latitude and -80.00 longitude, 375 m (1,230 ft) above sea level.
The station reports from 1867 to 1963, 97 years of record.
1,464 records set at Grafton 1 NE still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Grafton 1 NE set a daily record low minimum temperature of -20.0 C (-4.0 F) on 31 December 1963.
About the Station
Location: West Virginia, United States, 39.35 latitude, -80.00 longitude.
Elevation: 375 m (1,230 ft).
Period of record: 1867 to 1963, 97 years.
Eligible elements: tmax, tmin, prcp, snow.
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 1 NE. 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 1 NE, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.0 C (77.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Feb
26.7 C (80.1 F)
-32.8 C (-27.0 F)
n/a
n/a
Mar
32.2 C (90.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-16.7 C (1.9 F)
n/a
n/a
May
36.7 C (98.1 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
37.2 C (99.0 F)
0.6 C (33.1 F)
n/a
n/a
Jul
39.4 C (102.9 F)
1.7 C (35.1 F)
n/a
n/a
Aug
40.0 C (104.0 F)
2.2 C (36.0 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
35.6 C (96.1 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
29.4 C (84.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Dec
26.1 C (79.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Grafton 1 NE still stand. 1914 holds the most, with 42.
Standing records at Grafton 1 NE by the year they were set
Year set
Standing records
1891
5
1892
28
1893
18
1894
20
1895
34
1896
39
1897
21
1898
25
1899
29
1900
36
1901
22
1902
20
1903
27
1904
13
1905
23
1906
24
1907
27
1908
17
1909
15
1910
19
1911
25
1912
18
1913
26
1914
42
1915
10
1916
12
1917
16
1918
28
1919
26
1920
15
1921
16
1922
7
1923
11
1925
41
1926
9
1927
12
1928
22
1929
16
1930
10
1931
26
1932
31
1933
26
1934
22
1935
14
1936
27
1937
23
1938
26
1939
22
1940
17
1941
30
1942
29
1943
29
1944
10
1945
18
1946
12
1947
25
1948
17
1949
9
1950
21
1951
18
1952
10
1953
24
1954
10
1955
14
1956
17
1957
13
1958
9
1959
11
1960
28
1961
12
1962
19
1963
21
All-Time Record Progression
2 new records
2 all-time records were set at Grafton 1 NE between 24 August 1945 and 25 July 1946. Each dot is a new record.
When Grafton 1 NE set new all-time records
Date
Kind
Detail
1945-08-24
Record daily precipitation
Record daily precipitation 119.4 mm (4.7 in)
1946-07-25
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
Wettest Day of Each Month
Aug: 119.4 mm (4.7 in)
The wettest day on record for each calendar month at Grafton 1 NE. The most was 119.4 mm (4.7 in) on 24 August 1945.
Record daily precipitation for each month at Grafton 1 NE
Month
Record daily precipitation (mm)
Date
Jan
53.3 mm (2.1 in)
11 January 1913
Feb
76.2 mm (3.0 in)
20 February 1867
Mar
76.2 mm (3.0 in)
12 March 1867
Apr
71.4 mm (2.8 in)
12 April 1948
May
60.5 mm (2.4 in)
7 May 1942
Jun
66.0 mm (2.6 in)
16 June 1897
Jul
82.6 mm (3.3 in)
28 July 1867
Aug
119.4 mm (4.7 in)
24 August 1945
Sep
72.4 mm (2.9 in)
29 September 1934
Oct
87.1 mm (3.4 in)
15 October 1954
Nov
63.5 mm (2.5 in)
9 November 1913
Dec
61.0 mm (2.4 in)
25 December 1921
Period of Record Coverage
1891 to 1963
Complete yearUnder 90 percent of days
72 years of record at Grafton 1 NE, 1891 to 1963. 14 years have data for under 90 percent of days and are left out of rankings: 1891, 1909, 1916, 1921, 1922, 1923, 1925, 1926 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 53 complete years at Grafton 1 NE, 1892 to 1962. Blue stripes are years cooler than the station's own mean of 11.5 C (52.7 F); red stripes are warmer. The coolest year was 1917, at 9.6 C (49.2 F), and the warmest was 1938, at 13.6 C (56.4 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Grafton 1 NE as warming stripes, 1892 to 1962
Year
Annual mean temperature
Difference from the station mean
1892
10.9 C
-0.63 C
1893
11.2 C
-0.33 C
1894
12.0 C
+0.54 C
1895
10.6 C
-0.86 C
1896
11.4 C
-0.07 C
1897
11.4 C
-0.09 C
1898
11.8 C
+0.28 C
1899
11.6 C
+0.13 C
1900
11.9 C
+0.41 C
1901
10.1 C
-1.37 C
1902
11.1 C
-0.38 C
1903
11.2 C
-0.31 C
1904
10.8 C
-0.72 C
1905
11.1 C
-0.37 C
1906
12.2 C
+0.70 C
1907
11.0 C
-0.49 C
1908
12.0 C
+0.47 C
1910
11.6 C
+0.07 C
1912
11.8 C
+0.27 C
1913
13.0 C
+1.47 C
1914
11.5 C
+0.02 C
1915
12.0 C
+0.54 C
1917
9.6 C
-1.93 C
1918
12.1 C
+0.57 C
1919
12.5 C
+0.99 C
1920
11.3 C
-0.24 C
1932
12.4 C
+0.89 C
1934
12.4 C
+0.87 C
1935
11.8 C
+0.35 C
1936
12.0 C
+0.49 C
1937
12.3 C
+0.80 C
1938
13.6 C
+2.06 C
1939
13.4 C
+1.87 C
1940
11.6 C
+0.08 C
1941
12.2 C
+0.66 C
1942
10.9 C
-0.60 C
1943
10.0 C
-1.48 C
1944
10.9 C
-0.57 C
1947
10.5 C
-0.96 C
1948
11.2 C
-0.28 C
1949
12.1 C
+0.62 C
1950
10.7 C
-0.75 C
1951
11.1 C
-0.38 C
1952
11.5 C
-0.02 C
1953
11.9 C
+0.39 C
1954
11.4 C
-0.14 C
1955
11.2 C
-0.26 C
1957
11.9 C
+0.42 C
1958
10.1 C
-1.41 C
1959
12.0 C
+0.47 C
1960
10.6 C
-0.93 C
1961
11.3 C
-0.15 C
1962
10.7 C
-0.78 C
The fitted trend in annual mean temperature here over 1892 to 1962 is -0.01 C (-0.10 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.19 to 0.17) per decade. The slope is a straight line fitted to 53 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Grafton 1 NE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.01 C (-0.10 to 0.09) per decade
-0.01 F (-0.19 to 0.17) per decade
1892 to 1962
53
Not clearly different from zero
Mean daily maximum
0.14 C (0.01 to 0.27) per decade
0.25 F (0.01 to 0.48) per decade
1892 to 1962
53
Rise
Mean daily minimum
-0.1 C (-0.2 to 0.0) per decade
-0.3 F (-0.4 to -0.1) per decade
1892 to 1962
53
Fall
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
1867 to 1963
Yearly extremes at Grafton 1 NE: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1918
35.0 C (95.0 F)
72
Coldest night (TNn)
-32.8 C (-27.0 F)
1899
-20.6 C (-5.1 F)
72
Wettest day (Rx1day)
119.4 mm (4.7 in)
1945
51.6 mm (2.0 in)
74
Wettest five days (Rx5day)
152.1 mm (6.0 in)
1911
81.4 mm (3.2 in)
74
Longest dry spell (CDD)
27 days
1909
16 days
74
Hottest day (TXx)
The hottest day of the year at Grafton 1 NE, 1867 to 1963. The record is 40.0 C (104.0 F) in 1918, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Grafton 1 NE by year
Year
Hottest day (TXx)
1867
n/a
1868
n/a
1891
21.7 C (71.1 F)
1892
37.2 C (99.0 F)
1893
35.0 C (95.0 F)
1894
36.7 C (98.1 F)
1895
37.2 C (99.0 F)
1896
34.4 C (93.9 F)
1897
36.7 C (98.1 F)
1898
35.6 C (96.1 F)
1899
35.0 C (95.0 F)
1900
35.6 C (96.1 F)
1901
35.6 C (96.1 F)
1902
33.3 C (91.9 F)
1903
35.6 C (96.1 F)
1904
33.3 C (91.9 F)
1905
32.8 C (91.0 F)
1906
33.9 C (93.0 F)
1907
32.2 C (90.0 F)
1908
35.0 C (95.0 F)
1909
33.3 C (91.9 F)
1910
34.4 C (93.9 F)
1911
38.3 C (100.9 F)
1912
35.6 C (96.1 F)
1913
37.2 C (99.0 F)
1914
36.7 C (98.1 F)
1915
35.6 C (96.1 F)
1916
34.4 C (93.9 F)
1917
35.0 C (95.0 F)
1918
40.0 C (104.0 F)
1919
37.8 C (100.0 F)
1920
33.9 C (93.0 F)
1921
35.0 C (95.0 F)
1922
35.0 C (95.0 F)
1923
36.7 C (98.1 F)
1925
37.2 C (99.0 F)
1926
33.9 C (93.0 F)
1927
35.0 C (95.0 F)
1928
35.0 C (95.0 F)
1929
33.9 C (93.0 F)
1930
33.3 C (91.9 F)
1931
37.8 C (100.0 F)
1932
36.1 C (97.0 F)
1933
36.7 C (98.1 F)
1934
39.4 C (102.9 F)
1935
34.4 C (93.9 F)
1936
36.7 C (98.1 F)
1937
36.7 C (98.1 F)
1938
34.4 C (93.9 F)
1939
36.7 C (98.1 F)
1940
35.6 C (96.1 F)
1941
37.8 C (100.0 F)
1942
35.6 C (96.1 F)
1943
34.4 C (93.9 F)
1944
35.0 C (95.0 F)
1945
33.9 C (93.0 F)
1946
32.2 C (90.0 F)
1947
33.3 C (91.9 F)
1948
36.7 C (98.1 F)
1949
35.0 C (95.0 F)
1950
31.1 C (88.0 F)
1951
32.2 C (90.0 F)
1952
35.6 C (96.1 F)
1953
38.3 C (100.9 F)
1954
36.7 C (98.1 F)
1955
36.1 C (97.0 F)
1956
33.3 C (91.9 F)
1957
36.1 C (97.0 F)
1958
33.3 C (91.9 F)
1959
34.4 C (93.9 F)
1960
32.8 C (91.0 F)
1961
32.8 C (91.0 F)
1962
33.9 C (93.0 F)
1963
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Grafton 1 NE, 1867 to 1963. The record is -32.8 C (-27.0 F) in 1899, marked on the chart; the median year is -20.6 C (-5.1 F).
Coldest night (TNn) at Grafton 1 NE by year
Year
Coldest night (TNn)
1867
n/a
1868
n/a
1891
-11.1 C (12.0 F)
1892
-20.6 C (-5.1 F)
1893
-22.2 C (-8.0 F)
1894
-20.0 C (-4.0 F)
1895
-25.0 C (-13.0 F)
1896
-20.6 C (-5.1 F)
1897
-23.3 C (-9.9 F)
1898
-20.0 C (-4.0 F)
1899
-32.8 C (-27.0 F)
1900
-20.6 C (-5.1 F)
1901
-20.6 C (-5.1 F)
1902
-18.3 C (-0.9 F)
1903
-21.7 C (-7.1 F)
1904
-21.1 C (-6.0 F)
1905
-27.2 C (-17.0 F)
1906
-20.0 C (-4.0 F)
1907
-23.3 C (-9.9 F)
1908
-19.4 C (-2.9 F)
1909
-16.7 C (1.9 F)
1910
-18.9 C (-2.0 F)
1911
-15.0 C (5.0 F)
1912
-32.8 C (-27.0 F)
1913
-16.7 C (1.9 F)
1914
-26.1 C (-15.0 F)
1915
-12.8 C (9.0 F)
1916
-20.6 C (-5.1 F)
1917
-28.9 C (-20.0 F)
1918
-25.6 C (-14.1 F)
1919
-22.8 C (-9.0 F)
1920
-20.6 C (-5.1 F)
1921
-19.4 C (-2.9 F)
1922
-18.9 C (-2.0 F)
1923
-21.7 C (-7.1 F)
1925
-20.0 C (-4.0 F)
1926
-27.2 C (-17.0 F)
1927
-6.7 C (19.9 F)
1928
-12.8 C (9.0 F)
1929
-23.3 C (-9.9 F)
1930
-26.7 C (-16.1 F)
1931
-16.1 C (3.0 F)
1932
-16.1 C (3.0 F)
1933
-20.6 C (-5.1 F)
1934
-26.1 C (-15.0 F)
1935
-20.6 C (-5.1 F)
1936
-25.0 C (-13.0 F)
1937
-19.4 C (-2.9 F)
1938
-13.9 C (7.0 F)
1939
-13.9 C (7.0 F)
1940
-21.1 C (-6.0 F)
1941
-18.3 C (-0.9 F)
1942
-28.3 C (-18.9 F)
1943
-25.0 C (-13.0 F)
1944
-20.6 C (-5.1 F)
1945
-21.1 C (-6.0 F)
1946
-16.1 C (3.0 F)
1947
-21.1 C (-6.0 F)
1948
-27.8 C (-18.0 F)
1949
-15.0 C (5.0 F)
1950
-20.6 C (-5.1 F)
1951
-20.6 C (-5.1 F)
1952
-17.8 C (0.0 F)
1953
-18.3 C (-0.9 F)
1954
-19.4 C (-2.9 F)
1955
-20.6 C (-5.1 F)
1956
-17.2 C (1.0 F)
1957
-28.3 C (-18.9 F)
1958
-22.8 C (-9.0 F)
1959
-21.1 C (-6.0 F)
1960
-22.2 C (-8.0 F)
1961
-27.8 C (-18.0 F)
1962
-23.3 C (-9.9 F)
1963
-24.4 C (-11.9 F)
Wettest day (Rx1day)
The wettest day of the year at Grafton 1 NE, 1867 to 1963. The record is 119.4 mm (4.7 in) in 1945, marked on the chart; the median year is 51.6 mm (2.0 in).
Wettest day (Rx1day) at Grafton 1 NE by year
Year
Wettest day (Rx1day)
1867
82.6 mm (3.3 in)
1868
31.8 mm (1.3 in)
1891
33.5 mm (1.3 in)
1892
47.5 mm (1.9 in)
1893
37.1 mm (1.5 in)
1894
44.5 mm (1.8 in)
1895
37.1 mm (1.5 in)
1896
58.4 mm (2.3 in)
1897
66.0 mm (2.6 in)
1898
34.8 mm (1.4 in)
1899
47.0 mm (1.9 in)
1900
57.2 mm (2.3 in)
1901
57.2 mm (2.3 in)
1902
51.1 mm (2.0 in)
1903
36.8 mm (1.4 in)
1904
28.4 mm (1.1 in)
1905
82.0 mm (3.2 in)
1906
46.2 mm (1.8 in)
1907
39.9 mm (1.6 in)
1908
39.6 mm (1.6 in)
1909
33.5 mm (1.3 in)
1910
39.1 mm (1.5 in)
1911
94.2 mm (3.7 in)
1912
54.6 mm (2.1 in)
1913
63.5 mm (2.5 in)
1914
52.1 mm (2.1 in)
1915
52.6 mm (2.1 in)
1916
55.1 mm (2.2 in)
1917
76.2 mm (3.0 in)
1918
57.2 mm (2.3 in)
1919
58.4 mm (2.3 in)
1920
47.0 mm (1.9 in)
1921
66.5 mm (2.6 in)
1922
60.2 mm (2.4 in)
1923
50.8 mm (2.0 in)
1925
57.2 mm (2.3 in)
1926
28.2 mm (1.1 in)
1927
39.4 mm (1.6 in)
1928
35.8 mm (1.4 in)
1929
65.8 mm (2.6 in)
1930
21.6 mm (0.9 in)
1931
50.8 mm (2.0 in)
1932
45.2 mm (1.8 in)
1933
53.8 mm (2.1 in)
1934
76.2 mm (3.0 in)
1935
47.5 mm (1.9 in)
1936
72.4 mm (2.9 in)
1937
59.2 mm (2.3 in)
1938
50.8 mm (2.0 in)
1939
46.2 mm (1.8 in)
1940
63.5 mm (2.5 in)
1941
54.4 mm (2.1 in)
1942
72.1 mm (2.8 in)
1943
36.1 mm (1.4 in)
1944
71.9 mm (2.8 in)
1945
119.4 mm (4.7 in)
1946
52.6 mm (2.1 in)
1947
32.5 mm (1.3 in)
1948
71.4 mm (2.8 in)
1949
47.8 mm (1.9 in)
1950
46.2 mm (1.8 in)
1951
65.3 mm (2.6 in)
1952
38.9 mm (1.5 in)
1953
47.0 mm (1.9 in)
1954
87.1 mm (3.4 in)
1955
72.4 mm (2.9 in)
1956
60.2 mm (2.4 in)
1957
47.0 mm (1.9 in)
1958
41.9 mm (1.6 in)
1959
39.9 mm (1.6 in)
1960
52.1 mm (2.1 in)
1961
64.3 mm (2.5 in)
1962
43.2 mm (1.7 in)
1963
57.9 mm (2.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Grafton 1 NE, 1867 to 1963. The record is 152.1 mm (6.0 in) in 1911, marked on the chart; the median year is 81.4 mm (3.2 in).
Wettest five days (Rx5day) at Grafton 1 NE by year
Year
Wettest five days (Rx5day)
1867
99.1 mm (3.9 in)
1868
47.8 mm (1.9 in)
1891
34.3 mm (1.4 in)
1892
44.5 mm (1.8 in)
1893
67.2 mm (2.6 in)
1894
72.1 mm (2.8 in)
1895
80.2 mm (3.2 in)
1896
136.9 mm (5.4 in)
1897
92.4 mm (3.6 in)
1898
94.0 mm (3.7 in)
1899
99.3 mm (3.9 in)
1900
94.5 mm (3.7 in)
1901
87.3 mm (3.4 in)
1902
82.1 mm (3.2 in)
1903
76.2 mm (3.0 in)
1904
50.7 mm (2.0 in)
1905
76.3 mm (3.0 in)
1906
58.4 mm (2.3 in)
1907
105.1 mm (4.1 in)
1908
78.8 mm (3.1 in)
1909
47.9 mm (1.9 in)
1910
75.2 mm (3.0 in)
1911
152.1 mm (6.0 in)
1912
112.3 mm (4.4 in)
1913
97.8 mm (3.9 in)
1914
67.3 mm (2.6 in)
1915
111.8 mm (4.4 in)
1916
75.8 mm (3.0 in)
1917
91.9 mm (3.6 in)
1918
65.8 mm (2.6 in)
1919
82.6 mm (3.3 in)
1920
55.6 mm (2.2 in)
1921
94.2 mm (3.7 in)
1922
73.8 mm (2.9 in)
1923
125.7 mm (4.9 in)
1925
78.0 mm (3.1 in)
1926
53.1 mm (2.1 in)
1927
50.8 mm (2.0 in)
1928
77.1 mm (3.0 in)
1929
65.8 mm (2.6 in)
1930
51.8 mm (2.0 in)
1931
100.4 mm (4.0 in)
1932
76.4 mm (3.0 in)
1933
73.1 mm (2.9 in)
1934
88.9 mm (3.5 in)
1935
107.0 mm (4.2 in)
1936
141.1 mm (5.6 in)
1937
140.2 mm (5.5 in)
1938
83.3 mm (3.3 in)
1939
87.5 mm (3.4 in)
1940
86.9 mm (3.4 in)
1941
101.9 mm (4.0 in)
1942
88.4 mm (3.5 in)
1943
75.3 mm (3.0 in)
1944
74.2 mm (2.9 in)
1945
119.7 mm (4.7 in)
1946
58.2 mm (2.3 in)
1947
58.1 mm (2.3 in)
1948
120.2 mm (4.7 in)
1949
75.2 mm (3.0 in)
1950
94.6 mm (3.7 in)
1951
86.6 mm (3.4 in)
1952
91.7 mm (3.6 in)
1953
73.4 mm (2.9 in)
1954
103.1 mm (4.1 in)
1955
90.2 mm (3.6 in)
1956
85.8 mm (3.4 in)
1957
97.8 mm (3.9 in)
1958
68.4 mm (2.7 in)
1959
53.4 mm (2.1 in)
1960
78.8 mm (3.1 in)
1961
80.8 mm (3.2 in)
1962
71.1 mm (2.8 in)
1963
98.3 mm (3.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Grafton 1 NE, 1867 to 1963. The record is 27 days in 1909, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Grafton 1 NE by year
Year
Longest dry spell (CDD)
1867
17 days
1868
8 days
1891
10 days
1892
9 days
1893
11 days
1894
15 days
1895
14 days
1896
13 days
1897
26 days
1898
10 days
1899
19 days
1900
14 days
1901
17 days
1902
12 days
1903
18 days
1904
18 days
1905
19 days
1906
13 days
1907
11 days
1908
20 days
1909
27 days
1910
16 days
1911
22 days
1912
16 days
1913
16 days
1914
13 days
1915
15 days
1916
6 days
1917
27 days
1918
18 days
1919
20 days
1920
22 days
1921
12 days
1922
15 days
1923
14 days
1925
23 days
1926
10 days
1927
13 days
1928
18 days
1929
21 days
1930
14 days
1931
25 days
1932
16 days
1933
11 days
1934
19 days
1935
12 days
1936
16 days
1937
11 days
1938
20 days
1939
15 days
1940
10 days
1941
20 days
1942
16 days
1943
20 days
1944
11 days
1945
13 days
1946
12 days
1947
17 days
1948
12 days
1949
13 days
1950
11 days
1951
14 days
1952
17 days
1953
21 days
1954
12 days
1955
13 days
1956
14 days
1957
18 days
1958
16 days
1959
25 days
1960
18 days
1961
11 days
1962
19 days
1963
27 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
53 years with a frost
Across 53 years with a frost, the median last spring frost at Grafton 1 NE falls on 3 May and the median first autumn frost on 7 October, which leaves a median of 152 days between them.
Fitted over all years, the growing season changes by -2.6 days per decade at this station.
Frost dates and growing season at Grafton 1 NE
Measure
Median, all years
Earliest period
Recent period (1918 to 1962)
Recent against earliest
Fitted trend
Last spring frost
3 May
n/a
5 May
n/a
+1.3 days per decade
First autumn frost
7 October
n/a
1 October
n/a
-1.4 days per decade
Growing days
152 days
n/a
148 days
n/a
-2.6 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
57 years, 1894 to 1963
A day with at least 52.5 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 108.7 mm (4.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Grafton 1 NE: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
52.5 mm (2.1 in)
5 years
67.0 mm (2.6 in)
10 years
76.7 mm (3.0 in)
25 years
89.4 mm (3.5 in)
50 years
99.0 mm (3.9 in)
100 years
108.7 mm (4.3 in)
Longer than the 57 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, 57 years of values from 1894 to 1963.
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: 119.4 mm (4.7 in) in 1945; 94.2 mm (3.7 in) in 1911; 87.1 mm (3.4 in) in 1954.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Grafton 1 NE, at 1937 and 1942. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1937 ran 0.5 C (1.0 F) higher than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1942 ran 1.0 C (1.8 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Grafton 1 NE, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1937
+0.5
+1.0
possible
5
1942
-1.0
-1.8
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 Grafton 1 NE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grafton 1 NE 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.