Record envelope, standing records and threshold days for Tiffin (USC00338313), Ohio, United States, with 120 years of record.
Key Facts for Tiffin
Tiffin (USC00338313) is a weather station in Ohio, United States at 41.10 latitude and -83.19 longitude, 226 m (740 ft) above sea level.
The station reports from 1893 to 2012, 120 years of record.
1,464 records set at Tiffin still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Tiffin set a daily record precipitation of 17.8 mm (0.7 in) on 5 December 2011.
About the Station
Location: Ohio, United States, 41.10 latitude, -83.19 longitude.
Elevation: 226 m (740 ft).
Period of record: 1893 to 2012, 120 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 Tiffin. 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 Tiffin, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
22.8 C (73.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-28.9 C (-20.0 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-24.4 C (-11.9 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-14.4 C (6.1 F)
n/a
n/a
May
35.0 C (95.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
1.7 C (35.1 F)
n/a
n/a
Jul
41.1 C (106.0 F)
6.1 C (43.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
2.2 C (36.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-1.7 C (28.9 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-7.2 C (19.0 F)
n/a
n/a
Nov
27.8 C (82.0 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
22.2 C (72.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tiffin still stand. 1930 holds the most, with 35.
Standing records at Tiffin by the year they were set
Year set
Standing records
1893
6
1894
17
1895
30
1896
17
1897
15
1898
7
1899
22
1900
15
1901
14
1902
13
1903
16
1904
9
1905
8
1906
14
1907
15
1908
4
1909
9
1910
11
1911
20
1912
16
1913
13
1914
22
1915
16
1916
11
1917
16
1918
28
1919
5
1920
22
1921
9
1922
15
1923
15
1924
13
1925
26
1926
11
1927
12
1928
12
1929
18
1930
35
1931
16
1932
10
1933
23
1934
25
1935
9
1936
33
1937
5
1938
12
1939
8
1940
12
1941
9
1942
5
1943
8
1944
12
1945
20
1946
15
1947
10
1948
9
1949
16
1950
14
1951
17
1952
9
1953
12
1954
15
1955
7
1956
9
1957
3
1958
7
1959
13
1960
7
1961
3
1962
13
1963
14
1964
10
1965
6
1966
10
1967
15
1968
6
1969
11
1970
8
1971
6
1972
13
1973
10
1974
12
1975
10
1976
11
1977
13
1978
9
1979
10
1980
6
1981
12
1982
15
1983
22
1984
8
1985
12
1986
14
1987
5
1988
20
1989
13
1990
17
1991
19
1992
6
1993
7
1994
17
1995
7
1996
9
1997
8
1998
12
1999
7
2000
10
2001
11
2002
7
2003
5
2004
9
2005
11
2006
8
2007
9
2008
8
2009
5
2010
3
2011
5
All-Time Record Progression
8 new records
8 all-time records were set at Tiffin between 24 July 1934 and 23 July 2011. Each dot is a new record.
When Tiffin set new all-time records
Date
Kind
Detail
1934-07-24
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
1974-12-03
Record snow depth
Record snow depth 40.6 cm (16.0 in)
1978-01-27
Record snow depth
Record snow depth 53.3 cm (21.0 in)
1982-01-17
Record low maximum temperature
Record low maximum temperature -19.4 C (-2.9 F)
1983-12-25
Record low maximum temperature
Record low maximum temperature -21.7 C (-7.1 F)
1994-01-19
Record low maximum temperature
Record low maximum temperature -22.8 C (-9.0 F)
1994-01-19
Record low minimum temperature
Record low minimum temperature -29.4 C (-20.9 F)
2011-07-23
Record daily precipitation
Record daily precipitation 158.5 mm (6.2 in)
Wettest Day of Each Month
Jul: 158.5 mm (6.2 in)
The wettest day on record for each calendar month at Tiffin. The most was 158.5 mm (6.2 in) on 23 July 2011.
Record daily precipitation for each month at Tiffin
Month
Record daily precipitation (mm)
Date
Jan
51.6 mm (2.0 in)
8 January 1930
Feb
64.5 mm (2.5 in)
10 February 1959
Mar
92.7 mm (3.6 in)
25 March 1913
Apr
54.6 mm (2.1 in)
3 April 1903
May
82.3 mm (3.2 in)
28 May 1982
Jun
84.6 mm (3.3 in)
22 June 2006
Jul
158.5 mm (6.2 in)
23 July 2011
Aug
137.4 mm (5.4 in)
5 August 1919
Sep
93.2 mm (3.7 in)
9 September 1990
Oct
74.4 mm (2.9 in)
3 October 1893
Nov
63.8 mm (2.5 in)
17 November 1958
Dec
69.1 mm (2.7 in)
1 December 2006
Period of Record Coverage
1893 to 2011
Complete yearUnder 90 percent of days
119 years of record at Tiffin, 1893 to 2011. 4 years have data for under 90 percent of days and are left out of rankings: 1893, 1960, 1984, 2011.
Cooler than the station meanWarmer than the station mean
One stripe for each of 111 complete years at Tiffin, 1894 to 2010. Blue stripes are years cooler than the station's own mean of 10.4 C (50.7 F); red stripes are warmer. The coolest year was 1917, at 8.5 C (47.3 F), and the warmest was 1921, at 12.2 C (54.0 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Tiffin as warming stripes, 1894 to 2010
Year
Annual mean temperature
Difference from the station mean
1894
11.1 C
+0.73 C
1895
9.8 C
-0.65 C
1896
10.6 C
+0.19 C
1897
10.4 C
-0.02 C
1898
10.9 C
+0.46 C
1899
10.4 C
+0.02 C
1900
10.9 C
+0.51 C
1901
9.7 C
-0.69 C
1902
10.2 C
-0.21 C
1903
9.9 C
-0.52 C
1904
8.7 C
-1.75 C
1905
9.6 C
-0.82 C
1906
10.6 C
+0.22 C
1907
9.4 C
-1.03 C
1908
10.9 C
+0.52 C
1909
10.1 C
-0.26 C
1910
10.1 C
-0.33 C
1911
11.1 C
+0.68 C
1912
9.4 C
-1.03 C
1913
10.9 C
+0.51 C
1914
10.3 C
-0.08 C
1915
10.0 C
-0.43 C
1916
10.4 C
-0.04 C
1917
8.5 C
-1.92 C
1918
10.6 C
+0.17 C
1919
10.8 C
+0.36 C
1920
9.7 C
-0.68 C
1921
12.2 C
+1.81 C
1922
11.0 C
+0.59 C
1923
10.3 C
-0.11 C
1924
9.1 C
-1.33 C
1925
10.1 C
-0.32 C
1926
9.4 C
-1.05 C
1927
10.6 C
+0.21 C
1928
10.0 C
-0.39 C
1929
9.3 C
-1.11 C
1930
11.1 C
+0.67 C
1931
12.1 C
+1.73 C
1932
11.3 C
+0.85 C
1933
11.6 C
+1.15 C
1934
11.1 C
+0.71 C
1935
10.3 C
-0.15 C
1936
10.4 C
+0.03 C
1937
10.2 C
-0.23 C
1938
11.7 C
+1.32 C
1939
11.4 C
+0.97 C
1940
9.5 C
-0.86 C
1941
11.3 C
+0.85 C
1942
10.5 C
+0.14 C
1943
9.8 C
-0.59 C
1944
10.6 C
+0.18 C
1945
9.7 C
-0.72 C
1946
11.2 C
+0.84 C
1947
10.0 C
-0.36 C
1948
9.9 C
-0.55 C
1949
11.5 C
+1.12 C
1950
9.8 C
-0.63 C
1952
11.4 C
+1.01 C
1953
11.9 C
+1.48 C
1954
11.5 C
+1.06 C
1955
11.3 C
+0.93 C
1956
10.8 C
+0.42 C
1957
10.8 C
+0.43 C
1958
9.7 C
-0.74 C
1959
11.2 C
+0.84 C
1961
10.4 C
-0.03 C
1962
9.9 C
-0.49 C
1963
9.6 C
-0.81 C
1964
10.9 C
+0.54 C
1965
10.5 C
+0.07 C
1966
9.9 C
-0.49 C
1967
10.0 C
-0.40 C
1968
10.4 C
-0.01 C
1969
10.0 C
-0.44 C
1970
10.6 C
+0.24 C
1971
10.7 C
+0.33 C
1972
9.9 C
-0.55 C
1973
11.6 C
+1.16 C
1974
10.5 C
+0.06 C
1975
11.0 C
+0.59 C
1976
9.9 C
-0.49 C
1977
10.4 C
0.00 C
1978
9.4 C
-1.02 C
1980
10.0 C
-0.38 C
1981
10.4 C
-0.03 C
1983
9.4 C
-1.01 C
1985
10.0 C
-0.44 C
1986
10.5 C
+0.10 C
1987
11.0 C
+0.62 C
1988
9.9 C
-0.46 C
1990
11.1 C
+0.68 C
1991
11.4 C
+1.03 C
1992
9.7 C
-0.68 C
1993
9.7 C
-0.69 C
1994
9.9 C
-0.51 C
1995
9.7 C
-0.68 C
1996
9.4 C
-1.02 C
1997
9.5 C
-0.92 C
1998
12.1 C
+1.71 C
1999
11.0 C
+0.60 C
2000
10.2 C
-0.21 C
2001
11.1 C
+0.67 C
2002
11.1 C
+0.68 C
2003
9.6 C
-0.78 C
2004
10.2 C
-0.18 C
2005
10.6 C
+0.24 C
2006
11.2 C
+0.82 C
2007
10.7 C
+0.33 C
2008
9.7 C
-0.72 C
2009
9.6 C
-0.80 C
2010
10.5 C
+0.08 C
The fitted trend in annual mean temperature here over 1894 to 2010 is 0.01 C (-0.04 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.06 to 0.09) per decade. The slope is a straight line fitted to 111 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tiffin
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.04 to 0.05) per decade
0.01 F (-0.06 to 0.09) per decade
1894 to 2010
111
Not clearly different from zero
Mean daily maximum
-0.01 C (-0.06 to 0.04) per decade
-0.01 F (-0.10 to 0.08) per decade
1894 to 2010
111
Not clearly different from zero
Mean daily minimum
0.02 C (-0.03 to 0.07) per decade
0.03 F (-0.05 to 0.12) per decade
1894 to 2010
111
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
1893 to 2012
Yearly extremes at Tiffin: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
1934
35.6 C (96.1 F)
119
Coldest night (TNn)
-29.4 C (-20.9 F)
1994
-21.1 C (-6.0 F)
119
Wettest day (Rx1day)
158.5 mm (6.2 in)
2011
51.4 mm (2.0 in)
120
Wettest five days (Rx5day)
206.2 mm (8.1 in)
1981
77.5 mm (3.1 in)
120
Longest dry spell (CDD)
35 days
1924
16 days
120
Hottest day (TXx)
The hottest day of the year at Tiffin, 1893 to 2012. The record is 41.1 C (106.0 F) in 1934, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Tiffin by year
Year
Hottest day (TXx)
1893
34.4 C (93.9 F)
1894
36.1 C (97.0 F)
1895
36.1 C (97.0 F)
1896
35.0 C (95.0 F)
1897
36.7 C (98.1 F)
1898
35.6 C (96.1 F)
1899
35.0 C (95.0 F)
1900
33.9 C (93.0 F)
1901
34.4 C (93.9 F)
1902
33.3 C (91.9 F)
1903
34.4 C (93.9 F)
1904
33.3 C (91.9 F)
1905
33.9 C (93.0 F)
1906
35.0 C (95.0 F)
1907
31.7 C (89.1 F)
1908
33.9 C (93.0 F)
1909
33.9 C (93.0 F)
1910
34.4 C (93.9 F)
1911
37.8 C (100.0 F)
1912
35.0 C (95.0 F)
1913
36.1 C (97.0 F)
1914
36.7 C (98.1 F)
1915
33.3 C (91.9 F)
1916
37.8 C (100.0 F)
1917
36.7 C (98.1 F)
1918
40.6 C (105.1 F)
1919
36.1 C (97.0 F)
1920
35.6 C (96.1 F)
1921
37.8 C (100.0 F)
1922
36.1 C (97.0 F)
1923
36.1 C (97.0 F)
1924
36.1 C (97.0 F)
1925
37.8 C (100.0 F)
1926
37.2 C (99.0 F)
1927
36.1 C (97.0 F)
1928
35.0 C (95.0 F)
1929
33.9 C (93.0 F)
1930
40.0 C (104.0 F)
1931
37.8 C (100.0 F)
1932
38.9 C (102.0 F)
1933
38.9 C (102.0 F)
1934
41.1 C (106.0 F)
1935
36.7 C (98.1 F)
1936
41.1 C (106.0 F)
1937
35.0 C (95.0 F)
1938
33.9 C (93.0 F)
1939
37.8 C (100.0 F)
1940
37.2 C (99.0 F)
1941
38.9 C (102.0 F)
1942
36.7 C (98.1 F)
1943
35.6 C (96.1 F)
1944
38.3 C (100.9 F)
1945
35.0 C (95.0 F)
1946
35.0 C (95.0 F)
1947
36.1 C (97.0 F)
1948
36.7 C (98.1 F)
1949
36.1 C (97.0 F)
1950
32.8 C (91.0 F)
1951
37.8 C (100.0 F)
1952
37.2 C (99.0 F)
1953
37.8 C (100.0 F)
1954
37.2 C (99.0 F)
1955
36.7 C (98.1 F)
1956
35.0 C (95.0 F)
1957
35.6 C (96.1 F)
1958
33.3 C (91.9 F)
1959
35.0 C (95.0 F)
1960
30.6 C (87.1 F)
1961
33.9 C (93.0 F)
1962
34.4 C (93.9 F)
1963
35.0 C (95.0 F)
1964
36.1 C (97.0 F)
1965
35.0 C (95.0 F)
1966
35.6 C (96.1 F)
1967
35.0 C (95.0 F)
1968
33.3 C (91.9 F)
1969
33.3 C (91.9 F)
1970
34.4 C (93.9 F)
1971
36.1 C (97.0 F)
1972
33.3 C (91.9 F)
1973
33.9 C (93.0 F)
1974
35.6 C (96.1 F)
1975
34.4 C (93.9 F)
1976
35.0 C (95.0 F)
1977
35.0 C (95.0 F)
1978
34.4 C (93.9 F)
1979
33.9 C (93.0 F)
1980
37.2 C (99.0 F)
1981
35.0 C (95.0 F)
1982
33.3 C (91.9 F)
1983
36.7 C (98.1 F)
1984
18.3 C (64.9 F)
1985
33.3 C (91.9 F)
1986
33.9 C (93.0 F)
1987
35.6 C (96.1 F)
1988
40.6 C (105.1 F)
1989
36.1 C (97.0 F)
1990
36.7 C (98.1 F)
1991
37.2 C (99.0 F)
1992
32.8 C (91.0 F)
1993
36.1 C (97.0 F)
1994
36.7 C (98.1 F)
1995
35.6 C (96.1 F)
1996
34.4 C (93.9 F)
1997
33.3 C (91.9 F)
1998
35.0 C (95.0 F)
1999
36.1 C (97.0 F)
2000
32.2 C (90.0 F)
2001
36.7 C (98.1 F)
2002
36.1 C (97.0 F)
2003
32.8 C (91.0 F)
2004
32.2 C (90.0 F)
2005
36.1 C (97.0 F)
2006
34.4 C (93.9 F)
2007
35.6 C (96.1 F)
2008
35.0 C (95.0 F)
2009
34.4 C (93.9 F)
2010
35.6 C (96.1 F)
2011
36.7 C (98.1 F)
2012
n/a
Coldest night (TNn)
The coldest night of the year at Tiffin, 1893 to 2012. The record is -29.4 C (-20.9 F) in 1994, marked on the chart; the median year is -21.1 C (-6.0 F).
Coldest night (TNn) at Tiffin by year
Year
Coldest night (TNn)
1893
-12.2 C (10.0 F)
1894
-19.4 C (-2.9 F)
1895
-21.1 C (-6.0 F)
1896
-20.6 C (-5.1 F)
1897
-26.7 C (-16.1 F)
1898
-20.0 C (-4.0 F)
1899
-27.2 C (-17.0 F)
1900
-20.6 C (-5.1 F)
1901
-22.2 C (-8.0 F)
1902
-20.6 C (-5.1 F)
1903
-21.1 C (-6.0 F)
1904
-23.9 C (-11.0 F)
1905
-25.6 C (-14.1 F)
1906
-18.9 C (-2.0 F)
1907
-20.0 C (-4.0 F)
1908
-16.7 C (1.9 F)
1909
-21.1 C (-6.0 F)
1910
-18.3 C (-0.9 F)
1911
-20.0 C (-4.0 F)
1912
-25.6 C (-14.1 F)
1913
-17.8 C (0.0 F)
1914
-24.4 C (-11.9 F)
1915
-26.7 C (-16.1 F)
1916
-20.6 C (-5.1 F)
1917
-27.8 C (-18.0 F)
1918
-28.9 C (-20.0 F)
1919
-17.8 C (0.0 F)
1920
-20.6 C (-5.1 F)
1921
-12.2 C (10.0 F)
1922
-23.9 C (-11.0 F)
1923
-18.3 C (-0.9 F)
1924
-25.6 C (-14.1 F)
1925
-20.6 C (-5.1 F)
1926
-22.2 C (-8.0 F)
1927
-21.1 C (-6.0 F)
1928
-20.6 C (-5.1 F)
1929
-25.6 C (-14.1 F)
1930
-24.4 C (-11.9 F)
1931
-13.3 C (8.1 F)
1932
-21.1 C (-6.0 F)
1933
-21.1 C (-6.0 F)
1934
-24.4 C (-11.9 F)
1935
-20.0 C (-4.0 F)
1936
-26.1 C (-15.0 F)
1937
-14.4 C (6.1 F)
1938
-17.8 C (0.0 F)
1939
-16.1 C (3.0 F)
1940
-25.0 C (-13.0 F)
1941
-15.0 C (5.0 F)
1942
-22.2 C (-8.0 F)
1943
-20.6 C (-5.1 F)
1944
-22.8 C (-9.0 F)
1945
-20.6 C (-5.1 F)
1946
-20.0 C (-4.0 F)
1947
-18.9 C (-2.0 F)
1948
-25.6 C (-14.1 F)
1949
-16.7 C (1.9 F)
1950
-25.0 C (-13.0 F)
1951
-23.9 C (-11.0 F)
1952
-14.4 C (6.1 F)
1953
-17.2 C (1.0 F)
1954
-17.2 C (1.0 F)
1955
-20.0 C (-4.0 F)
1956
-16.7 C (1.9 F)
1957
-22.2 C (-8.0 F)
1958
-22.8 C (-9.0 F)
1959
-21.7 C (-7.1 F)
1960
-22.2 C (-8.0 F)
1961
-21.7 C (-7.1 F)
1962
-22.8 C (-9.0 F)
1963
-27.8 C (-18.0 F)
1964
-20.0 C (-4.0 F)
1965
-21.7 C (-7.1 F)
1966
-21.1 C (-6.0 F)
1967
-23.9 C (-11.0 F)
1968
-23.9 C (-11.0 F)
1969
-19.4 C (-2.9 F)
1970
-22.8 C (-9.0 F)
1971
-20.6 C (-5.1 F)
1972
-26.1 C (-15.0 F)
1973
-20.0 C (-4.0 F)
1974
-18.3 C (-0.9 F)
1975
-22.2 C (-8.0 F)
1976
-23.9 C (-11.0 F)
1977
-26.7 C (-16.1 F)
1978
-23.3 C (-9.9 F)
1979
-23.9 C (-11.0 F)
1980
-21.1 C (-6.0 F)
1981
-23.3 C (-9.9 F)
1982
-27.2 C (-17.0 F)
1983
-25.6 C (-14.1 F)
1984
-27.2 C (-17.0 F)
1985
-27.2 C (-17.0 F)
1986
-18.9 C (-2.0 F)
1987
-19.4 C (-2.9 F)
1988
-20.0 C (-4.0 F)
1989
-27.8 C (-18.0 F)
1990
-16.1 C (3.0 F)
1991
-17.8 C (0.0 F)
1992
-21.7 C (-7.1 F)
1993
-20.0 C (-4.0 F)
1994
-29.4 C (-20.9 F)
1995
-19.4 C (-2.9 F)
1996
-21.1 C (-6.0 F)
1997
-19.4 C (-2.9 F)
1998
-13.9 C (7.0 F)
1999
-21.7 C (-7.1 F)
2000
-22.2 C (-8.0 F)
2001
-16.1 C (3.0 F)
2002
-15.0 C (5.0 F)
2003
-25.6 C (-14.1 F)
2004
-26.1 C (-15.0 F)
2005
-18.9 C (-2.0 F)
2006
-14.4 C (6.1 F)
2007
-23.3 C (-9.9 F)
2008
-18.9 C (-2.0 F)
2009
-26.7 C (-16.1 F)
2010
-19.4 C (-2.9 F)
2011
-20.0 C (-4.0 F)
2012
n/a
Wettest day (Rx1day)
The wettest day of the year at Tiffin, 1893 to 2012. The record is 158.5 mm (6.2 in) in 2011, marked on the chart; the median year is 51.4 mm (2.0 in).
Wettest day (Rx1day) at Tiffin by year
Year
Wettest day (Rx1day)
1893
74.4 mm (2.9 in)
1894
129.0 mm (5.1 in)
1895
54.4 mm (2.1 in)
1896
42.2 mm (1.7 in)
1897
31.8 mm (1.3 in)
1898
68.3 mm (2.7 in)
1899
35.3 mm (1.4 in)
1900
44.7 mm (1.8 in)
1901
43.9 mm (1.7 in)
1902
63.0 mm (2.5 in)
1903
74.4 mm (2.9 in)
1904
46.7 mm (1.8 in)
1905
52.8 mm (2.1 in)
1906
30.5 mm (1.2 in)
1907
41.1 mm (1.6 in)
1908
50.3 mm (2.0 in)
1909
47.5 mm (1.9 in)
1910
68.1 mm (2.7 in)
1911
53.3 mm (2.1 in)
1912
48.0 mm (1.9 in)
1913
92.7 mm (3.6 in)
1914
53.8 mm (2.1 in)
1915
49.8 mm (2.0 in)
1916
34.8 mm (1.4 in)
1917
54.9 mm (2.2 in)
1918
59.9 mm (2.4 in)
1919
137.4 mm (5.4 in)
1920
65.5 mm (2.6 in)
1921
35.6 mm (1.4 in)
1922
42.7 mm (1.7 in)
1923
42.7 mm (1.7 in)
1924
44.5 mm (1.8 in)
1925
55.1 mm (2.2 in)
1926
81.0 mm (3.2 in)
1927
43.4 mm (1.7 in)
1928
48.8 mm (1.9 in)
1929
56.6 mm (2.2 in)
1930
51.6 mm (2.0 in)
1931
33.0 mm (1.3 in)
1932
37.6 mm (1.5 in)
1933
59.4 mm (2.3 in)
1934
39.1 mm (1.5 in)
1935
82.0 mm (3.2 in)
1936
63.8 mm (2.5 in)
1937
66.8 mm (2.6 in)
1938
77.7 mm (3.1 in)
1939
35.8 mm (1.4 in)
1940
70.4 mm (2.8 in)
1941
47.8 mm (1.9 in)
1942
42.4 mm (1.7 in)
1943
62.0 mm (2.4 in)
1944
52.8 mm (2.1 in)
1945
58.4 mm (2.3 in)
1946
55.1 mm (2.2 in)
1947
52.3 mm (2.1 in)
1948
53.1 mm (2.1 in)
1949
49.5 mm (1.9 in)
1950
73.2 mm (2.9 in)
1951
46.2 mm (1.8 in)
1952
54.1 mm (2.1 in)
1953
57.2 mm (2.3 in)
1954
35.3 mm (1.4 in)
1955
52.8 mm (2.1 in)
1956
37.6 mm (1.5 in)
1957
49.8 mm (2.0 in)
1958
63.8 mm (2.5 in)
1959
64.5 mm (2.5 in)
1960
32.8 mm (1.3 in)
1961
77.0 mm (3.0 in)
1962
57.7 mm (2.3 in)
1963
27.7 mm (1.1 in)
1964
51.6 mm (2.0 in)
1965
42.4 mm (1.7 in)
1966
48.8 mm (1.9 in)
1967
33.0 mm (1.3 in)
1968
72.9 mm (2.9 in)
1969
56.1 mm (2.2 in)
1970
37.1 mm (1.5 in)
1971
62.5 mm (2.5 in)
1972
46.5 mm (1.8 in)
1973
41.4 mm (1.6 in)
1974
43.2 mm (1.7 in)
1975
50.0 mm (2.0 in)
1976
46.0 mm (1.8 in)
1977
48.8 mm (1.9 in)
1978
33.8 mm (1.3 in)
1979
51.1 mm (2.0 in)
1980
46.0 mm (1.8 in)
1981
76.2 mm (3.0 in)
1982
82.3 mm (3.2 in)
1983
44.7 mm (1.8 in)
1984
21.6 mm (0.9 in)
1985
40.6 mm (1.6 in)
1986
46.2 mm (1.8 in)
1987
55.6 mm (2.2 in)
1988
30.0 mm (1.2 in)
1989
39.9 mm (1.6 in)
1990
93.2 mm (3.7 in)
1991
46.5 mm (1.8 in)
1992
45.2 mm (1.8 in)
1993
60.5 mm (2.4 in)
1994
71.9 mm (2.8 in)
1995
58.9 mm (2.3 in)
1996
55.1 mm (2.2 in)
1997
66.8 mm (2.6 in)
1998
90.2 mm (3.6 in)
1999
35.6 mm (1.4 in)
2000
79.5 mm (3.1 in)
2001
41.9 mm (1.6 in)
2002
40.6 mm (1.6 in)
2003
52.8 mm (2.1 in)
2004
59.9 mm (2.4 in)
2005
67.6 mm (2.7 in)
2006
84.6 mm (3.3 in)
2007
91.9 mm (3.6 in)
2008
43.4 mm (1.7 in)
2009
42.7 mm (1.7 in)
2010
41.1 mm (1.6 in)
2011
158.5 mm (6.2 in)
2012
17.8 mm (0.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tiffin, 1893 to 2012. The record is 206.2 mm (8.1 in) in 1981, marked on the chart; the median year is 77.5 mm (3.1 in).
Wettest five days (Rx5day) at Tiffin by year
Year
Wettest five days (Rx5day)
1893
79.7 mm (3.1 in)
1894
129.8 mm (5.1 in)
1895
59.7 mm (2.4 in)
1896
64.8 mm (2.6 in)
1897
42.9 mm (1.7 in)
1898
61.2 mm (2.4 in)
1899
61.8 mm (2.4 in)
1900
35.1 mm (1.4 in)
1901
55.1 mm (2.2 in)
1902
125.3 mm (4.9 in)
1903
93.7 mm (3.7 in)
1904
114.6 mm (4.5 in)
1905
92.4 mm (3.6 in)
1906
48.5 mm (1.9 in)
1907
57.0 mm (2.2 in)
1908
76.2 mm (3.0 in)
1909
90.9 mm (3.6 in)
1910
112.5 mm (4.4 in)
1911
72.9 mm (2.9 in)
1912
65.5 mm (2.6 in)
1913
202.4 mm (8.0 in)
1914
68.7 mm (2.7 in)
1915
72.2 mm (2.8 in)
1916
63.2 mm (2.5 in)
1917
70.1 mm (2.8 in)
1918
70.8 mm (2.8 in)
1919
146.1 mm (5.8 in)
1920
82.5 mm (3.2 in)
1921
58.9 mm (2.3 in)
1922
78.2 mm (3.1 in)
1923
82.9 mm (3.3 in)
1924
73.8 mm (2.9 in)
1925
77.2 mm (3.0 in)
1926
122.2 mm (4.8 in)
1927
67.4 mm (2.7 in)
1928
86.7 mm (3.4 in)
1929
123.2 mm (4.9 in)
1930
108.5 mm (4.3 in)
1931
57.4 mm (2.3 in)
1932
47.5 mm (1.9 in)
1933
66.5 mm (2.6 in)
1934
62.5 mm (2.5 in)
1935
96.5 mm (3.8 in)
1936
83.9 mm (3.3 in)
1937
89.4 mm (3.5 in)
1938
127.0 mm (5.0 in)
1939
54.3 mm (2.1 in)
1940
121.1 mm (4.8 in)
1941
77.8 mm (3.1 in)
1942
70.7 mm (2.8 in)
1943
72.2 mm (2.8 in)
1944
61.9 mm (2.4 in)
1945
89.8 mm (3.5 in)
1946
99.8 mm (3.9 in)
1947
82.1 mm (3.2 in)
1948
64.3 mm (2.5 in)
1949
105.2 mm (4.1 in)
1950
96.5 mm (3.8 in)
1951
52.1 mm (2.1 in)
1952
67.9 mm (2.7 in)
1953
102.7 mm (4.0 in)
1954
69.1 mm (2.7 in)
1955
71.8 mm (2.8 in)
1956
68.1 mm (2.7 in)
1957
85.4 mm (3.4 in)
1958
96.3 mm (3.8 in)
1959
85.2 mm (3.4 in)
1960
51.3 mm (2.0 in)
1961
104.9 mm (4.1 in)
1962
90.1 mm (3.5 in)
1963
68.3 mm (2.7 in)
1964
76.0 mm (3.0 in)
1965
65.3 mm (2.6 in)
1966
107.0 mm (4.2 in)
1967
69.1 mm (2.7 in)
1968
94.3 mm (3.7 in)
1969
83.5 mm (3.3 in)
1970
75.0 mm (3.0 in)
1971
63.0 mm (2.5 in)
1972
68.1 mm (2.7 in)
1973
57.2 mm (2.3 in)
1974
67.6 mm (2.7 in)
1975
63.0 mm (2.5 in)
1976
49.6 mm (2.0 in)
1977
112.8 mm (4.4 in)
1978
64.5 mm (2.5 in)
1979
79.8 mm (3.1 in)
1980
87.1 mm (3.4 in)
1981
206.2 mm (8.1 in)
1982
93.1 mm (3.7 in)
1983
65.6 mm (2.6 in)
1984
27.4 mm (1.1 in)
1985
55.6 mm (2.2 in)
1986
74.8 mm (2.9 in)
1987
103.1 mm (4.1 in)
1988
44.0 mm (1.7 in)
1989
68.6 mm (2.7 in)
1990
111.6 mm (4.4 in)
1991
91.0 mm (3.6 in)
1992
101.7 mm (4.0 in)
1993
93.3 mm (3.7 in)
1994
82.3 mm (3.2 in)
1995
82.3 mm (3.2 in)
1996
59.2 mm (2.3 in)
1997
86.1 mm (3.4 in)
1998
136.7 mm (5.4 in)
1999
65.3 mm (2.6 in)
2000
124.7 mm (4.9 in)
2001
55.2 mm (2.2 in)
2002
76.2 mm (3.0 in)
2003
109.4 mm (4.3 in)
2004
101.6 mm (4.0 in)
2005
96.5 mm (3.8 in)
2006
135.5 mm (5.3 in)
2007
126.1 mm (5.0 in)
2008
98.0 mm (3.9 in)
2009
103.9 mm (4.1 in)
2010
64.5 mm (2.5 in)
2011
192.3 mm (7.6 in)
2012
27.9 mm (1.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tiffin, 1893 to 2012. The record is 35 days in 1924, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Tiffin by year
Year
Longest dry spell (CDD)
1893
14 days
1894
23 days
1895
13 days
1896
6 days
1897
6 days
1898
8 days
1899
10 days
1900
15 days
1901
10 days
1902
12 days
1903
18 days
1904
25 days
1905
18 days
1906
12 days
1907
13 days
1908
31 days
1909
12 days
1910
18 days
1911
13 days
1912
24 days
1913
15 days
1914
16 days
1915
13 days
1916
14 days
1917
19 days
1918
18 days
1919
17 days
1920
18 days
1921
11 days
1922
25 days
1923
15 days
1924
35 days
1925
15 days
1926
13 days
1927
19 days
1928
9 days
1929
13 days
1930
17 days
1931
15 days
1932
13 days
1933
18 days
1934
21 days
1935
16 days
1936
21 days
1937
15 days
1938
16 days
1939
14 days
1940
19 days
1941
15 days
1942
21 days
1943
20 days
1944
18 days
1945
23 days
1946
12 days
1947
17 days
1948
14 days
1949
21 days
1950
12 days
1951
16 days
1952
20 days
1953
27 days
1954
19 days
1955
13 days
1956
13 days
1957
23 days
1958
13 days
1959
15 days
1960
12 days
1961
15 days
1962
17 days
1963
31 days
1964
17 days
1965
14 days
1966
16 days
1967
25 days
1968
17 days
1969
25 days
1970
22 days
1971
11 days
1972
14 days
1973
13 days
1974
11 days
1975
14 days
1976
25 days
1977
17 days
1978
20 days
1979
12 days
1980
17 days
1981
24 days
1982
15 days
1983
26 days
1984
9 days
1985
22 days
1986
10 days
1987
28 days
1988
17 days
1989
12 days
1990
16 days
1991
12 days
1992
16 days
1993
22 days
1994
19 days
1995
21 days
1996
19 days
1997
11 days
1998
19 days
1999
21 days
2000
13 days
2001
21 days
2002
15 days
2003
19 days
2004
25 days
2005
15 days
2006
17 days
2007
15 days
2008
15 days
2009
18 days
2010
29 days
2011
14 days
2012
11 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
111 years with a frost
Across 111 years with a frost, the median last spring frost at Tiffin falls on 29 April and the median first autumn frost on 15 October, which leaves a median of 169 days between them.
In 1977 to 2010 the median growing season was 173 days. That is 5 days more than in 1894 to 1923.
Fitted over all years, the growing season changes by +0.7 days per decade at this station.
Frost dates and growing season at Tiffin
Measure
Median, all years
Earliest period (1894 to 1923)
Recent period (1977 to 2010)
Recent against earliest
Fitted trend
Last spring frost
29 April
2 May
26 April
6 days earlier
-0.4 days per decade
First autumn frost
15 October
13 October
18 October
5 days later
+0.3 days per decade
Growing days
169 days
168 days
173 days
5 days more
+0.7 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
109 years, 1894 to 2011
A day with at least 51.5 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 132.5 mm (5.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Tiffin: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
51.5 mm (2.0 in)
5 years
67.9 mm (2.7 in)
10 years
80.7 mm (3.2 in)
25 years
99.2 mm (3.9 in)
50 years
114.9 mm (4.5 in)
100 years
132.5 mm (5.2 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 109 years of values from 1894 to 2011.
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: 158.5 mm (6.2 in) in 2011; 137.4 mm (5.4 in) in 1919; 129.0 mm (5.1 in) in 1894.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Tiffin, at 1944. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1944 ran 0.3 C (0.5 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Tiffin, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1944
-0.3
-0.5
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 Tiffin standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tiffin 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.