Record envelope, standing records and threshold days for Griffin (USC00093936), Georgia, United States, with 78 years of record.
Key Facts for Griffin
Griffin (USC00093936) is a weather station in Georgia, United States at 33.25 latitude and -84.27 longitude, 299 m (981 ft) above sea level.
The station reports from 1892 to 1969, 78 years of record.
1,464 records set at Griffin still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Griffin tied a daily record low maximum temperature of 0.0 C (32.0 F) on 16 February 1969.
About the Station
Location: Georgia, United States, 33.25 latitude, -84.27 longitude.
Elevation: 299 m (981 ft).
Period of record: 1892 to 1969, 78 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 Griffin. 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 Griffin, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
27.8 C (82.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Feb
28.9 C (84.0 F)
-15.6 C (3.9 F)
n/a
n/a
Mar
33.3 C (91.9 F)
-11.1 C (12.0 F)
n/a
n/a
Apr
36.7 C (98.1 F)
-2.8 C (27.0 F)
n/a
n/a
May
37.8 C (100.0 F)
2.2 C (36.0 F)
n/a
n/a
Jun
39.4 C (102.9 F)
7.2 C (45.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
12.2 C (54.0 F)
n/a
n/a
Aug
42.2 C (108.0 F)
12.8 C (55.0 F)
n/a
n/a
Sep
42.2 C (108.0 F)
4.4 C (39.9 F)
n/a
n/a
Oct
36.7 C (98.1 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
30.6 C (87.1 F)
-14.4 C (6.1 F)
n/a
n/a
Dec
26.1 C (79.0 F)
-16.7 C (1.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Griffin still stand. 1925 holds the most, with 82.
Standing records at Griffin by the year they were set
Year set
Standing records
1892
2
1893
1
1899
4
1901
14
1902
37
1903
38
1904
15
1905
26
1906
23
1907
29
1908
17
1909
17
1910
35
1911
20
1912
22
1913
37
1914
34
1915
28
1916
15
1917
43
1918
35
1919
23
1920
14
1921
25
1922
24
1923
13
1924
24
1925
82
1926
22
1927
30
1928
16
1929
28
1930
19
1931
21
1932
24
1933
16
1934
29
1935
15
1936
17
1937
21
1938
13
1939
9
1940
33
1941
16
1942
14
1943
21
1944
16
1945
12
1946
9
1947
16
1948
13
1949
11
1950
22
1951
15
1952
27
1953
12
1954
25
1955
15
1956
14
1957
17
1958
17
1959
10
1960
14
1961
22
1962
20
1963
14
1964
17
1965
9
1966
9
1967
26
1968
21
All-Time Record Progression
1 new records
1 all-time records were set at Griffin between 24 January 1963 and 24 January 1963. Each dot is a new record.
When Griffin set new all-time records
Date
Kind
Detail
1963-01-24
Record low minimum temperature
Record low minimum temperature -18.3 C (-0.9 F)
Wettest Day of Each Month
Feb: 165.1 mm (6.5 in)
The wettest day on record for each calendar month at Griffin. The most was 165.1 mm (6.5 in) on 28 February 1902.
Record daily precipitation for each month at Griffin
Month
Record daily precipitation (mm)
Date
Jan
113.8 mm (4.5 in)
19 January 1943
Feb
165.1 mm (6.5 in)
28 February 1902
Mar
137.4 mm (5.4 in)
29 March 1920
Apr
108.0 mm (4.3 in)
25 April 1945
May
76.2 mm (3.0 in)
8 May 1915
Jun
112.0 mm (4.4 in)
1 June 1915
Jul
146.1 mm (5.8 in)
8 July 1916
Aug
131.6 mm (5.2 in)
2 August 1916
Sep
140.0 mm (5.5 in)
30 September 1936
Oct
147.6 mm (5.8 in)
1 October 1965
Nov
131.8 mm (5.2 in)
27 November 1948
Dec
129.0 mm (5.1 in)
8 December 1919
Period of Record Coverage
1892 to 1969
Complete yearUnder 90 percent of days
73 years of record at Griffin, 1892 to 1969. 6 years have data for under 90 percent of days and are left out of rankings: 1892, 1893, 1894, 1899, 1901, 1969.
Cooler than the station meanWarmer than the station mean
One stripe for each of 64 complete years at Griffin, 1902 to 1968. Blue stripes are years cooler than the station's own mean of 17.5 C (63.4 F); red stripes are warmer. The coolest year was 1910, at 16.1 C (61.0 F), and the warmest was 1925, at 19.2 C (66.6 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Griffin as warming stripes, 1902 to 1968
Year
Annual mean temperature
Difference from the station mean
1902
17.5 C
+0.01 C
1903
16.6 C
-0.87 C
1904
16.7 C
-0.78 C
1906
17.4 C
-0.04 C
1907
17.5 C
+0.03 C
1908
17.5 C
0.00 C
1909
16.8 C
-0.63 C
1910
16.1 C
-1.36 C
1911
17.8 C
+0.31 C
1912
16.5 C
-0.93 C
1914
17.0 C
-0.48 C
1915
17.4 C
-0.10 C
1916
17.4 C
-0.09 C
1917
16.5 C
-0.98 C
1918
17.5 C
-0.01 C
1919
18.1 C
+0.66 C
1920
17.1 C
-0.36 C
1921
19.2 C
+1.69 C
1923
17.9 C
+0.40 C
1924
17.2 C
-0.30 C
1925
19.2 C
+1.76 C
1926
17.6 C
+0.16 C
1927
18.9 C
+1.47 C
1928
17.3 C
-0.21 C
1929
17.6 C
+0.09 C
1930
17.4 C
-0.05 C
1931
18.0 C
+0.52 C
1932
17.6 C
+0.11 C
1933
17.9 C
+0.43 C
1934
17.2 C
-0.28 C
1935
17.9 C
+0.39 C
1936
17.9 C
+0.41 C
1937
17.6 C
+0.14 C
1938
18.3 C
+0.88 C
1939
18.3 C
+0.79 C
1940
16.6 C
-0.86 C
1941
18.0 C
+0.57 C
1942
17.6 C
+0.09 C
1943
17.7 C
+0.20 C
1944
17.5 C
+0.08 C
1945
17.7 C
+0.19 C
1946
17.9 C
+0.48 C
1947
17.0 C
-0.45 C
1948
17.8 C
+0.34 C
1949
17.7 C
+0.27 C
1950
17.3 C
-0.16 C
1951
17.6 C
+0.12 C
1952
18.0 C
+0.54 C
1953
17.8 C
+0.34 C
1954
18.1 C
+0.64 C
1955
17.6 C
+0.18 C
1956
17.9 C
+0.41 C
1957
17.7 C
+0.28 C
1958
16.8 C
-0.71 C
1959
17.6 C
+0.10 C
1960
16.8 C
-0.62 C
1961
17.0 C
-0.51 C
1962
17.5 C
+0.06 C
1963
16.6 C
-0.82 C
1964
17.0 C
-0.43 C
1965
17.3 C
-0.20 C
1966
16.5 C
-0.99 C
1967
16.8 C
-0.62 C
1968
16.4 C
-1.07 C
The fitted trend in annual mean temperature here over 1902 to 1968 is -0.01 C (-0.09 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.16 to 0.13) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Griffin
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.01 C (-0.09 to 0.07) per decade
-0.01 F (-0.16 to 0.13) per decade
1902 to 1968
64
Not clearly different from zero
Mean daily maximum
-0.10 C (-0.20 to 0.00) per decade
-0.18 F (-0.37 to 0.01) per decade
1902 to 1968
64
Not clearly different from zero
Mean daily minimum
0.08 C (0.00 to 0.16) per decade
0.15 F (0.01 to 0.29) per decade
1902 to 1968
64
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
1892 to 1969
Yearly extremes at Griffin: 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)
1925
37.2 C (99.0 F)
73
Coldest night (TNn)
-18.3 C (-0.9 F)
1963
-10.0 C (14.0 F)
72
Wettest day (Rx1day)
165.1 mm (6.5 in)
1902
81.5 mm (3.2 in)
73
Wettest five days (Rx5day)
362.3 mm (14.3 in)
1916
129.3 mm (5.1 in)
72
Longest dry spell (CDD)
50 days
1904
21 days
72
Hottest day (TXx)
The hottest day of the year at Griffin, 1892 to 1969. The record is 42.2 C (108.0 F) in 1925, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Griffin by year
Year
Hottest day (TXx)
1892
36.7 C (98.1 F)
1893
37.2 C (99.0 F)
1894
21.1 C (70.0 F)
1899
22.8 C (73.0 F)
1901
37.2 C (99.0 F)
1902
40.0 C (104.0 F)
1903
36.7 C (98.1 F)
1904
36.7 C (98.1 F)
1905
37.2 C (99.0 F)
1906
36.1 C (97.0 F)
1907
37.8 C (100.0 F)
1908
37.2 C (99.0 F)
1909
37.2 C (99.0 F)
1910
35.6 C (96.1 F)
1911
37.2 C (99.0 F)
1912
37.2 C (99.0 F)
1913
38.9 C (102.0 F)
1914
39.4 C (102.9 F)
1915
38.9 C (102.0 F)
1916
36.7 C (98.1 F)
1917
36.1 C (97.0 F)
1918
37.8 C (100.0 F)
1919
36.1 C (97.0 F)
1920
37.8 C (100.0 F)
1921
38.9 C (102.0 F)
1922
37.8 C (100.0 F)
1923
37.2 C (99.0 F)
1924
38.3 C (100.9 F)
1925
42.2 C (108.0 F)
1926
39.4 C (102.9 F)
1927
38.9 C (102.0 F)
1928
35.6 C (96.1 F)
1929
36.1 C (97.0 F)
1930
39.4 C (102.9 F)
1931
39.4 C (102.9 F)
1932
38.9 C (102.0 F)
1933
37.2 C (99.0 F)
1934
37.2 C (99.0 F)
1935
36.7 C (98.1 F)
1936
38.3 C (100.9 F)
1937
36.7 C (98.1 F)
1938
38.3 C (100.9 F)
1939
37.2 C (99.0 F)
1940
36.1 C (97.0 F)
1941
37.2 C (99.0 F)
1942
36.7 C (98.1 F)
1943
36.7 C (98.1 F)
1944
37.2 C (99.0 F)
1945
35.0 C (95.0 F)
1946
33.9 C (93.0 F)
1947
35.0 C (95.0 F)
1948
37.2 C (99.0 F)
1949
35.6 C (96.1 F)
1950
36.1 C (97.0 F)
1951
36.7 C (98.1 F)
1952
40.0 C (104.0 F)
1953
36.1 C (97.0 F)
1954
38.3 C (100.9 F)
1955
36.1 C (97.0 F)
1956
36.7 C (98.1 F)
1957
36.1 C (97.0 F)
1958
36.7 C (98.1 F)
1959
36.7 C (98.1 F)
1960
36.7 C (98.1 F)
1961
36.7 C (98.1 F)
1962
37.8 C (100.0 F)
1963
35.6 C (96.1 F)
1964
37.8 C (100.0 F)
1965
33.3 C (91.9 F)
1966
36.1 C (97.0 F)
1967
33.9 C (93.0 F)
1968
38.3 C (100.9 F)
1969
21.1 C (70.0 F)
Coldest night (TNn)
The coldest night of the year at Griffin, 1892 to 1969. The record is -18.3 C (-0.9 F) in 1963, marked on the chart; the median year is -10.0 C (14.0 F).
Coldest night (TNn) at Griffin by year
Year
Coldest night (TNn)
1892
-4.4 C (24.1 F)
1893
-6.7 C (19.9 F)
1894
n/a
1899
-12.2 C (10.0 F)
1901
-13.3 C (8.1 F)
1902
-9.4 C (15.1 F)
1903
-9.4 C (15.1 F)
1904
-10.0 C (14.0 F)
1905
-15.6 C (3.9 F)
1906
-9.4 C (15.1 F)
1907
-5.6 C (21.9 F)
1908
-8.9 C (16.0 F)
1909
-13.3 C (8.1 F)
1910
-9.4 C (15.1 F)
1911
-12.2 C (10.0 F)
1912
-13.3 C (8.1 F)
1913
-3.9 C (25.0 F)
1914
-10.0 C (14.0 F)
1915
-5.6 C (21.9 F)
1916
-9.4 C (15.1 F)
1917
-15.6 C (3.9 F)
1918
-14.4 C (6.1 F)
1919
-13.9 C (7.0 F)
1920
-10.0 C (14.0 F)
1921
-2.8 C (27.0 F)
1922
-6.7 C (19.9 F)
1923
-9.4 C (15.1 F)
1924
-16.1 C (3.0 F)
1925
-14.4 C (6.1 F)
1926
-8.9 C (16.0 F)
1927
-12.2 C (10.0 F)
1928
-16.7 C (1.9 F)
1929
-10.0 C (14.0 F)
1930
-8.3 C (17.1 F)
1931
-8.9 C (16.0 F)
1932
-10.6 C (12.9 F)
1933
-14.4 C (6.1 F)
1934
-15.0 C (5.0 F)
1935
-11.7 C (10.9 F)
1936
-12.8 C (9.0 F)
1937
-11.7 C (10.9 F)
1938
-8.9 C (16.0 F)
1939
-7.8 C (18.0 F)
1940
-15.0 C (5.0 F)
1941
-6.1 C (21.0 F)
1942
-11.7 C (10.9 F)
1943
-11.1 C (12.0 F)
1944
-8.3 C (17.1 F)
1945
-9.4 C (15.1 F)
1946
-6.7 C (19.9 F)
1947
-9.4 C (15.1 F)
1948
-11.7 C (10.9 F)
1949
-4.4 C (24.1 F)
1950
-14.4 C (6.1 F)
1951
-12.2 C (10.0 F)
1952
-8.3 C (17.1 F)
1953
-9.4 C (15.1 F)
1954
-6.7 C (19.9 F)
1955
-10.0 C (14.0 F)
1956
-5.6 C (21.9 F)
1957
-10.6 C (12.9 F)
1958
-14.4 C (6.1 F)
1959
-10.6 C (12.9 F)
1960
-11.7 C (10.9 F)
1961
-11.7 C (10.9 F)
1962
-16.7 C (1.9 F)
1963
-18.3 C (-0.9 F)
1964
-9.4 C (15.1 F)
1965
-11.1 C (12.0 F)
1966
-18.3 C (-0.9 F)
1967
-12.2 C (10.0 F)
1968
-8.3 C (17.1 F)
1969
-9.4 C (15.1 F)
Wettest day (Rx1day)
The wettest day of the year at Griffin, 1892 to 1969. The record is 165.1 mm (6.5 in) in 1902, marked on the chart; the median year is 81.5 mm (3.2 in).
Wettest day (Rx1day) at Griffin by year
Year
Wettest day (Rx1day)
1892
38.1 mm (1.5 in)
1893
48.3 mm (1.9 in)
1894
129.5 mm (5.1 in)
1899
50.8 mm (2.0 in)
1901
72.4 mm (2.9 in)
1902
165.1 mm (6.5 in)
1903
137.7 mm (5.4 in)
1904
55.4 mm (2.2 in)
1905
47.0 mm (1.9 in)
1906
119.4 mm (4.7 in)
1907
58.4 mm (2.3 in)
1908
88.9 mm (3.5 in)
1909
59.7 mm (2.4 in)
1910
53.3 mm (2.1 in)
1911
43.9 mm (1.7 in)
1912
71.1 mm (2.8 in)
1913
52.1 mm (2.1 in)
1914
77.5 mm (3.1 in)
1915
112.0 mm (4.4 in)
1916
146.1 mm (5.8 in)
1917
100.8 mm (4.0 in)
1918
59.4 mm (2.3 in)
1919
129.0 mm (5.1 in)
1920
137.4 mm (5.4 in)
1921
68.3 mm (2.7 in)
1922
68.8 mm (2.7 in)
1923
88.4 mm (3.5 in)
1924
50.3 mm (2.0 in)
1925
72.4 mm (2.9 in)
1926
83.8 mm (3.3 in)
1927
55.9 mm (2.2 in)
1928
94.2 mm (3.7 in)
1929
127.5 mm (5.0 in)
1930
66.0 mm (2.6 in)
1931
40.1 mm (1.6 in)
1932
101.6 mm (4.0 in)
1933
77.5 mm (3.1 in)
1934
61.0 mm (2.4 in)
1935
84.3 mm (3.3 in)
1936
140.0 mm (5.5 in)
1937
103.4 mm (4.1 in)
1938
67.8 mm (2.7 in)
1939
90.9 mm (3.6 in)
1940
74.4 mm (2.9 in)
1941
83.1 mm (3.3 in)
1942
129.0 mm (5.1 in)
1943
113.8 mm (4.5 in)
1944
102.9 mm (4.1 in)
1945
108.0 mm (4.3 in)
1946
78.7 mm (3.1 in)
1947
117.6 mm (4.6 in)
1948
131.8 mm (5.2 in)
1949
68.8 mm (2.7 in)
1950
108.5 mm (4.3 in)
1951
46.0 mm (1.8 in)
1952
81.5 mm (3.2 in)
1953
93.0 mm (3.7 in)
1954
47.5 mm (1.9 in)
1955
63.2 mm (2.5 in)
1956
113.0 mm (4.4 in)
1957
94.5 mm (3.7 in)
1958
51.8 mm (2.0 in)
1959
108.7 mm (4.3 in)
1960
65.5 mm (2.6 in)
1961
104.4 mm (4.1 in)
1962
57.7 mm (2.3 in)
1963
98.3 mm (3.9 in)
1964
123.2 mm (4.9 in)
1965
147.6 mm (5.8 in)
1966
122.7 mm (4.8 in)
1967
42.2 mm (1.7 in)
1968
81.0 mm (3.2 in)
1969
25.9 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Griffin, 1892 to 1969. The record is 362.3 mm (14.3 in) in 1916, marked on the chart; the median year is 129.3 mm (5.1 in).
Wettest five days (Rx5day) at Griffin by year
Year
Wettest five days (Rx5day)
1892
39.9 mm (1.6 in)
1893
104.6 mm (4.1 in)
1894
143.5 mm (5.6 in)
1899
n/a
1901
115.9 mm (4.6 in)
1902
194.3 mm (7.6 in)
1903
192.3 mm (7.6 in)
1904
126.2 mm (5.0 in)
1905
68.6 mm (2.7 in)
1906
145.0 mm (5.7 in)
1907
104.1 mm (4.1 in)
1908
107.5 mm (4.2 in)
1909
58.6 mm (2.3 in)
1910
94.7 mm (3.7 in)
1911
123.4 mm (4.9 in)
1912
100.5 mm (4.0 in)
1913
131.8 mm (5.2 in)
1914
98.3 mm (3.9 in)
1915
140.0 mm (5.5 in)
1916
362.3 mm (14.3 in)
1917
216.8 mm (8.5 in)
1918
127.0 mm (5.0 in)
1919
239.0 mm (9.4 in)
1920
179.3 mm (7.1 in)
1921
105.6 mm (4.2 in)
1922
140.5 mm (5.5 in)
1923
128.8 mm (5.1 in)
1924
108.0 mm (4.3 in)
1925
201.7 mm (7.9 in)
1926
131.0 mm (5.2 in)
1927
137.6 mm (5.4 in)
1928
130.3 mm (5.1 in)
1929
192.5 mm (7.6 in)
1930
140.7 mm (5.5 in)
1931
65.3 mm (2.6 in)
1932
129.8 mm (5.1 in)
1933
88.4 mm (3.5 in)
1934
86.9 mm (3.4 in)
1935
96.5 mm (3.8 in)
1936
190.5 mm (7.5 in)
1937
120.0 mm (4.7 in)
1938
136.8 mm (5.4 in)
1939
119.6 mm (4.7 in)
1940
125.0 mm (4.9 in)
1941
142.8 mm (5.6 in)
1942
171.4 mm (6.7 in)
1943
171.3 mm (6.7 in)
1944
113.1 mm (4.5 in)
1945
145.0 mm (5.7 in)
1946
113.0 mm (4.4 in)
1947
143.5 mm (5.6 in)
1948
201.9 mm (7.9 in)
1949
119.1 mm (4.7 in)
1950
137.2 mm (5.4 in)
1951
80.8 mm (3.2 in)
1952
111.5 mm (4.4 in)
1953
138.5 mm (5.5 in)
1954
66.0 mm (2.6 in)
1955
103.3 mm (4.1 in)
1956
196.3 mm (7.7 in)
1957
131.1 mm (5.2 in)
1958
76.7 mm (3.0 in)
1959
172.2 mm (6.8 in)
1960
112.0 mm (4.4 in)
1961
225.8 mm (8.9 in)
1962
101.8 mm (4.0 in)
1963
132.8 mm (5.2 in)
1964
178.1 mm (7.0 in)
1965
164.6 mm (6.5 in)
1966
153.0 mm (6.0 in)
1967
95.7 mm (3.8 in)
1968
105.9 mm (4.2 in)
1969
42.2 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Griffin, 1892 to 1969. The record is 50 days in 1904, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Griffin by year
Year
Longest dry spell (CDD)
1892
30 days
1893
46 days
1894
23 days
1899
n/a
1901
4 days
1902
20 days
1903
21 days
1904
50 days
1905
43 days
1906
26 days
1907
18 days
1908
18 days
1909
16 days
1910
18 days
1911
20 days
1912
16 days
1913
17 days
1914
23 days
1915
24 days
1916
32 days
1917
20 days
1918
19 days
1919
18 days
1920
26 days
1921
36 days
1922
24 days
1923
44 days
1924
25 days
1925
25 days
1926
16 days
1927
20 days
1928
15 days
1929
15 days
1930
21 days
1931
32 days
1932
17 days
1933
20 days
1934
18 days
1935
33 days
1936
45 days
1937
18 days
1938
21 days
1939
45 days
1940
21 days
1941
24 days
1942
22 days
1943
21 days
1944
20 days
1945
15 days
1946
15 days
1947
21 days
1948
23 days
1949
12 days
1950
30 days
1951
23 days
1952
18 days
1953
24 days
1954
32 days
1955
29 days
1956
18 days
1957
19 days
1958
27 days
1959
20 days
1960
16 days
1961
49 days
1962
17 days
1963
33 days
1964
34 days
1965
23 days
1966
14 days
1967
24 days
1968
18 days
1969
17 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
64 years with a frost
Across 64 years with a frost, the median last spring frost at Griffin falls on 24 March and the median first autumn frost on 12 November, which leaves a median of 232 days between them.
In 1939 to 1968 the median growing season was 230 days. That is 7 days fewer than in 1902 to 1934.
Fitted over all years, the growing season changes by -0.1 days per decade at this station.
Frost dates and growing season at Griffin
Measure
Median, all years
Earliest period (1902 to 1934)
Recent period (1939 to 1968)
Recent against earliest
Fitted trend
Last spring frost
24 March
23 March
24 March
1 day later
+0.2 days per decade
First autumn frost
12 November
13 November
9 November
4 days earlier
+0.1 days per decade
Growing days
232 days
237 days
230 days
7 days fewer
-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
66 years, 1894 to 1968
A day with at least 87.3 mm (3.4 in) of rain is expected about once in 2 years. A day with at least 173.4 mm (6.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Griffin: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
87.3 mm (3.4 in)
5 years
116.1 mm (4.6 in)
10 years
132.6 mm (5.2 in)
25 years
150.9 mm (5.9 in)
50 years
162.8 mm (6.4 in)
100 years
173.4 mm (6.8 in)
Longer than the 66 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, 66 years of values from 1894 to 1968.
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: 165.1 mm (6.5 in) in 1902; 147.6 mm (5.8 in) in 1965; 146.1 mm (5.8 in) in 1916.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Griffin, at 1962. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1962 ran 0.4 C (0.7 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Griffin, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1962
+0.4
+0.7
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 Griffin standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Griffin 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.