Record envelope, standing records and threshold days for Hanover (USC00273850), New Hampshire, United States, with 143 years of record.
Key Facts for Hanover
Hanover (USC00273850) is a weather station in New Hampshire, United States at 43.71 latitude and -72.29 longitude, 178 m (584 ft) above sea level.
The station reports from 1884 to 2026, 143 years of record.
1,464 records set at Hanover still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hanover set a daily record low minimum temperature of 3.3 C (37.9 F) on 27 June 2026.
About the Station
Location: New Hampshire, United States, 43.71 latitude, -72.29 longitude.
Elevation: 178 m (584 ft).
Period of record: 1884 to 2026, 143 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
7 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 Hanover. The lines show the 2026 daily maximum and minimum. 7 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Hanover, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.8 C (64.0 F)
-36.7 C (-34.1 F)
8.9 C (48.0 F)
-22.8 C (-9.0 F)
Feb
18.9 C (66.0 F)
-40.0 C (-40.0 F)
7.8 C (46.0 F)
-22.8 C (-9.0 F)
Mar
30.0 C (86.0 F)
-30.0 C (-22.0 F)
22.8 C (73.0 F)
-19.4 C (-2.9 F)
Apr
33.9 C (93.0 F)
-17.8 C (0.0 F)
25.6 C (78.1 F)
-7.2 C (19.0 F)
May
35.6 C (96.1 F)
-6.7 C (19.9 F)
30.0 C (86.0 F)
-2.2 C (28.0 F)
Jun
36.7 C (98.1 F)
-1.7 C (28.9 F)
32.2 C (90.0 F)
1.7 C (35.1 F)
Jul
38.3 C (100.9 F)
2.8 C (37.0 F)
34.4 C (93.9 F)
8.3 C (46.9 F)
Aug
39.4 C (102.9 F)
0.6 C (33.1 F)
32.8 C (91.0 F)
10.0 C (50.0 F)
Sep
36.1 C (97.0 F)
-5.6 C (21.9 F)
26.1 C (79.0 F)
5.0 C (41.0 F)
Oct
30.6 C (87.1 F)
-11.7 C (10.9 F)
23.9 C (75.0 F)
-0.6 C (30.9 F)
Nov
26.1 C (79.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Dec
24.4 C (75.9 F)
-38.3 C (-36.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hanover still stand. 1914 holds the most, with 31.
Standing records at Hanover by the year they were set
Year set
Standing records
1893
8
1894
11
1895
9
1896
11
1897
12
1898
10
1899
13
1900
15
1901
14
1902
10
1903
14
1904
21
1905
9
1906
18
1907
17
1908
11
1909
12
1910
9
1911
25
1912
20
1913
13
1914
31
1915
9
1916
19
1917
22
1918
24
1919
13
1920
11
1921
11
1922
8
1923
16
1924
8
1925
11
1926
10
1927
6
1928
6
1929
16
1930
12
1931
8
1932
8
1933
13
1934
14
1935
6
1936
16
1937
8
1938
12
1939
14
1940
17
1941
6
1942
12
1943
14
1944
14
1945
12
1946
12
1947
14
1948
15
1949
11
1950
15
1951
10
1952
7
1953
19
1954
10
1955
5
1956
12
1957
11
1958
6
1959
8
1960
3
1961
11
1962
3
1963
11
1964
10
1965
8
1966
11
1967
9
1968
13
1969
8
1970
2
1971
6
1972
6
1973
9
1974
9
1975
3
1976
9
1977
8
1978
5
1979
21
1980
4
1981
13
1982
10
1983
8
1984
7
1985
5
1986
6
1987
21
1988
14
1989
10
1990
15
1991
11
1992
8
1993
4
1994
9
1995
9
1996
4
1997
3
1998
19
1999
12
2000
5
2001
12
2002
19
2003
5
2004
8
2005
9
2006
7
2007
11
2008
4
2009
6
2010
7
2011
3
2012
14
2013
2
2014
5
2015
12
2016
15
2017
23
2018
16
2019
6
2020
19
2021
11
2022
13
2023
10
2024
10
2025
3
2026
8
All-Time Record Progression
4 new records
4 all-time records were set at Hanover between 30 December 1933 and 9 August 1998. Each dot is a new record.
When Hanover set new all-time records
Date
Kind
Detail
1933-12-30
Record low maximum temperature
Record low maximum temperature -24.4 C (-11.9 F)
1943-02-16
Record low minimum temperature
Record low minimum temperature -40.0 C (-40.0 F)
1975-08-02
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
1998-08-09
Record high minimum temperature
Record high minimum temperature 23.9 C (75.0 F)
Wettest Day of Each Month
Mar: 104.1 mm (4.1 in)
The wettest day on record for each calendar month at Hanover. The most was 104.1 mm (4.1 in) on 20 March 1896.
Record daily precipitation for each month at Hanover
Month
Record daily precipitation (mm)
Date
Jan
57.4 mm (2.3 in)
14 January 1887
Feb
87.6 mm (3.4 in)
21 February 1996
Mar
104.1 mm (4.1 in)
20 March 1896
Apr
58.7 mm (2.3 in)
7 April 1924
May
75.2 mm (3.0 in)
31 May 1984
Jun
73.7 mm (2.9 in)
1 June 1952
Jul
92.2 mm (3.6 in)
17 July 1911
Aug
101.3 mm (4.0 in)
1 August 1983
Sep
81.8 mm (3.2 in)
17 September 1999
Oct
93.7 mm (3.7 in)
24 October 1923
Nov
96.8 mm (3.8 in)
3 November 1927
Dec
61.2 mm (2.4 in)
17 December 2000
Period of Record Coverage
1893 to 2026
Complete yearUnder 90 percent of days
134 years of record at Hanover, 1893 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1893, 1979, 1980, 1999, 2001, 2025, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 121 complete years at Hanover, 1894 to 2024. Blue stripes are years cooler than the station's own mean of 7.3 C (45.1 F); red stripes are warmer. The coolest year was 1904, at 4.8 C (40.7 F), and the warmest was 2024, at 10.1 C (50.2 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Hanover as warming stripes, 1894 to 2024
Year
Annual mean temperature
Difference from the station mean
1894
7.1 C
-0.21 C
1895
6.3 C
-0.96 C
1896
6.5 C
-0.76 C
1897
6.5 C
-0.84 C
1898
7.4 C
+0.08 C
1899
6.5 C
-0.77 C
1900
6.6 C
-0.68 C
1901
6.7 C
-0.65 C
1902
6.5 C
-0.83 C
1903
6.8 C
-0.51 C
1904
4.8 C
-2.47 C
1905
5.9 C
-1.40 C
1906
6.7 C
-0.64 C
1907
5.7 C
-1.59 C
1908
6.9 C
-0.41 C
1909
6.5 C
-0.83 C
1910
6.7 C
-0.63 C
1911
6.7 C
-0.63 C
1912
6.1 C
-1.24 C
1913
7.9 C
+0.62 C
1914
5.8 C
-1.47 C
1915
7.5 C
+0.20 C
1916
6.5 C
-0.85 C
1917
5.2 C
-2.11 C
1918
6.4 C
-0.93 C
1919
7.0 C
-0.29 C
1920
6.4 C
-0.92 C
1921
7.9 C
+0.59 C
1922
6.8 C
-0.54 C
1923
6.0 C
-1.27 C
1924
6.2 C
-1.15 C
1925
6.6 C
-0.71 C
1926
5.4 C
-1.94 C
1927
7.2 C
-0.10 C
1928
7.1 C
-0.21 C
1929
6.8 C
-0.54 C
1930
7.5 C
+0.16 C
1931
7.9 C
+0.57 C
1932
7.5 C
+0.18 C
1933
7.2 C
-0.09 C
1934
6.4 C
-0.87 C
1935
6.4 C
-0.95 C
1936
6.8 C
-0.53 C
1937
7.5 C
+0.20 C
1938
7.6 C
+0.27 C
1939
6.5 C
-0.78 C
1940
5.9 C
-1.37 C
1941
7.1 C
-0.20 C
1942
7.1 C
-0.21 C
1943
5.8 C
-1.54 C
1944
6.6 C
-0.73 C
1945
6.9 C
-0.36 C
1946
7.3 C
+0.01 C
1947
6.8 C
-0.46 C
1948
6.7 C
-0.57 C
1949
8.4 C
+1.13 C
1950
6.8 C
-0.54 C
1951
7.3 C
+0.02 C
1952
7.7 C
+0.36 C
1953
8.7 C
+1.35 C
1954
7.1 C
-0.19 C
1955
7.3 C
+0.04 C
1956
6.6 C
-0.67 C
1957
7.8 C
+0.47 C
1958
6.4 C
-0.88 C
1959
7.7 C
+0.39 C
1960
7.3 C
-0.02 C
1961
7.3 C
+0.03 C
1962
6.5 C
-0.82 C
1963
6.8 C
-0.49 C
1964
7.0 C
-0.26 C
1966
7.0 C
-0.31 C
1967
6.6 C
-0.69 C
1968
6.6 C
-0.69 C
1969
7.3 C
+0.01 C
1970
7.0 C
-0.28 C
1971
7.0 C
-0.33 C
1972
6.5 C
-0.85 C
1973
8.2 C
+0.85 C
1974
6.9 C
-0.40 C
1975
7.5 C
+0.23 C
1976
6.7 C
-0.59 C
1977
7.5 C
+0.20 C
1978
6.4 C
-0.94 C
1981
8.3 C
+1.03 C
1982
7.4 C
+0.07 C
1983
8.2 C
+0.90 C
1984
7.7 C
+0.42 C
1985
7.7 C
+0.35 C
1986
7.5 C
+0.17 C
1987
7.8 C
+0.52 C
1988
7.6 C
+0.26 C
1990
8.7 C
+1.39 C
1991
8.4 C
+1.14 C
1992
6.7 C
-0.58 C
1993
7.3 C
-0.03 C
1994
7.4 C
+0.07 C
1995
7.6 C
+0.33 C
1996
7.6 C
+0.32 C
2000
7.6 C
+0.31 C
2002
8.5 C
+1.24 C
2004
7.5 C
+0.17 C
2005
8.0 C
+0.70 C
2006
9.0 C
+1.70 C
2007
7.5 C
+0.21 C
2008
8.0 C
+0.65 C
2009
7.6 C
+0.34 C
2010
9.1 C
+1.80 C
2012
9.7 C
+2.42 C
2013
8.8 C
+1.47 C
2014
7.9 C
+0.61 C
2015
8.6 C
+1.25 C
2016
9.6 C
+2.30 C
2017
9.1 C
+1.81 C
2018
8.9 C
+1.56 C
2019
8.3 C
+1.00 C
2020
9.8 C
+2.48 C
2021
9.6 C
+2.26 C
2022
9.5 C
+2.22 C
2023
9.9 C
+2.61 C
2024
10.1 C
+2.81 C
The annual mean temperature here has risen by 0.2 C (0.2 to 0.2) per decade over 1894 to 2024. In Fahrenheit: 0.3 F (0.3 to 0.4) per decade. The slope is a straight line fitted to 121 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hanover
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.2 to 0.2) per decade
0.3 F (0.3 to 0.4) per decade
1894 to 2024
121
Rise
Mean daily maximum
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.3) per decade
1894 to 2024
121
Rise
Mean daily minimum
0.2 C (0.2 to 0.3) per decade
0.4 F (0.4 to 0.5) per decade
1894 to 2024
121
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
1884 to 2026
Yearly extremes at Hanover: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1975
34.4 C (93.9 F)
134
Coldest night (TNn)
-40.0 C (-40.0 F)
1943
-28.9 C (-20.0 F)
134
Wettest day (Rx1day)
104.1 mm (4.1 in)
1896
50.5 mm (2.0 in)
143
Wettest five days (Rx5day)
201.2 mm (7.9 in)
2023
75.0 mm (3.0 in)
143
Longest dry spell (CDD)
35 days
1915
16 days
143
Hottest day (TXx)
The hottest day of the year at Hanover, 1884 to 2026. The record is 39.4 C (102.9 F) in 1975, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Hanover by year
Year
Hottest day (TXx)
1884
n/a
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
30.6 C (87.1 F)
1894
32.2 C (90.0 F)
1895
31.1 C (88.0 F)
1896
32.2 C (90.0 F)
1897
32.8 C (91.0 F)
1898
35.6 C (96.1 F)
1899
35.0 C (95.0 F)
1900
35.0 C (95.0 F)
1901
36.7 C (98.1 F)
1902
31.7 C (89.1 F)
1903
35.0 C (95.0 F)
1904
34.4 C (93.9 F)
1905
32.8 C (91.0 F)
1906
35.6 C (96.1 F)
1907
35.6 C (96.1 F)
1908
35.0 C (95.0 F)
1909
34.4 C (93.9 F)
1910
35.0 C (95.0 F)
1911
38.3 C (100.9 F)
1912
36.7 C (98.1 F)
1913
36.7 C (98.1 F)
1914
35.0 C (95.0 F)
1915
32.8 C (91.0 F)
1916
35.6 C (96.1 F)
1917
36.7 C (98.1 F)
1918
36.1 C (97.0 F)
1919
36.1 C (97.0 F)
1920
33.9 C (93.0 F)
1921
36.1 C (97.0 F)
1922
32.8 C (91.0 F)
1923
34.4 C (93.9 F)
1924
33.9 C (93.0 F)
1925
35.0 C (95.0 F)
1926
35.0 C (95.0 F)
1927
33.3 C (91.9 F)
1928
33.3 C (91.9 F)
1929
33.9 C (93.0 F)
1930
32.2 C (90.0 F)
1931
33.9 C (93.0 F)
1932
33.3 C (91.9 F)
1933
36.7 C (98.1 F)
1934
33.3 C (91.9 F)
1935
33.9 C (93.0 F)
1936
33.9 C (93.0 F)
1937
33.9 C (93.0 F)
1938
34.4 C (93.9 F)
1939
35.0 C (95.0 F)
1940
33.3 C (91.9 F)
1941
35.0 C (95.0 F)
1942
34.4 C (93.9 F)
1943
33.3 C (91.9 F)
1944
36.1 C (97.0 F)
1945
35.0 C (95.0 F)
1946
34.4 C (93.9 F)
1947
35.0 C (95.0 F)
1948
36.1 C (97.0 F)
1949
34.4 C (93.9 F)
1950
31.1 C (88.0 F)
1951
31.7 C (89.1 F)
1952
35.6 C (96.1 F)
1953
37.2 C (99.0 F)
1954
33.9 C (93.0 F)
1955
35.6 C (96.1 F)
1956
34.4 C (93.9 F)
1957
33.9 C (93.0 F)
1958
32.2 C (90.0 F)
1959
34.4 C (93.9 F)
1960
33.3 C (91.9 F)
1961
32.8 C (91.0 F)
1962
33.9 C (93.0 F)
1963
35.6 C (96.1 F)
1964
36.1 C (97.0 F)
1965
35.0 C (95.0 F)
1966
35.6 C (96.1 F)
1967
32.2 C (90.0 F)
1968
34.4 C (93.9 F)
1969
34.4 C (93.9 F)
1970
34.4 C (93.9 F)
1971
34.4 C (93.9 F)
1972
32.2 C (90.0 F)
1973
34.4 C (93.9 F)
1974
32.8 C (91.0 F)
1975
39.4 C (102.9 F)
1976
32.2 C (90.0 F)
1977
35.0 C (95.0 F)
1978
33.9 C (93.0 F)
1979
33.9 C (93.0 F)
1980
32.8 C (91.0 F)
1981
35.0 C (95.0 F)
1982
35.6 C (96.1 F)
1983
36.7 C (98.1 F)
1984
35.0 C (95.0 F)
1985
35.0 C (95.0 F)
1986
34.4 C (93.9 F)
1987
36.7 C (98.1 F)
1988
38.3 C (100.9 F)
1989
35.6 C (96.1 F)
1990
33.9 C (93.0 F)
1991
35.6 C (96.1 F)
1992
32.8 C (91.0 F)
1993
33.9 C (93.0 F)
1994
35.6 C (96.1 F)
1995
36.7 C (98.1 F)
1996
34.4 C (93.9 F)
1997
33.9 C (93.0 F)
1998
33.3 C (91.9 F)
1999
35.6 C (96.1 F)
2000
31.7 C (89.1 F)
2001
36.1 C (97.0 F)
2002
36.1 C (97.0 F)
2003
35.0 C (95.0 F)
2004
32.2 C (90.0 F)
2005
34.4 C (93.9 F)
2006
34.4 C (93.9 F)
2007
33.9 C (93.0 F)
2008
36.1 C (97.0 F)
2009
33.9 C (93.0 F)
2010
35.0 C (95.0 F)
2011
35.6 C (96.1 F)
2012
35.0 C (95.0 F)
2013
34.4 C (93.9 F)
2014
33.9 C (93.0 F)
2015
33.9 C (93.0 F)
2016
34.4 C (93.9 F)
2017
34.4 C (93.9 F)
2018
35.0 C (95.0 F)
2019
34.4 C (93.9 F)
2020
35.0 C (95.0 F)
2021
33.3 C (91.9 F)
2022
35.0 C (95.0 F)
2023
33.9 C (93.0 F)
2024
35.0 C (95.0 F)
2025
33.9 C (93.0 F)
2026
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Hanover, 1884 to 2026. The record is -40.0 C (-40.0 F) in 1943, marked on the chart; the median year is -28.9 C (-20.0 F).
Coldest night (TNn) at Hanover by year
Year
Coldest night (TNn)
1884
n/a
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
-31.1 C (-24.0 F)
1894
-33.9 C (-29.0 F)
1895
-27.2 C (-17.0 F)
1896
-31.1 C (-24.0 F)
1897
-25.6 C (-14.1 F)
1898
-30.6 C (-23.1 F)
1899
-30.6 C (-23.1 F)
1900
-30.0 C (-22.0 F)
1901
-31.1 C (-24.0 F)
1902
-29.4 C (-20.9 F)
1903
-31.1 C (-24.0 F)
1904
-36.7 C (-34.1 F)
1905
-31.1 C (-24.0 F)
1906
-28.3 C (-18.9 F)
1907
-33.3 C (-27.9 F)
1908
-33.3 C (-27.9 F)
1909
-30.0 C (-22.0 F)
1910
-30.6 C (-23.1 F)
1911
-28.3 C (-18.9 F)
1912
-34.4 C (-29.9 F)
1913
-24.4 C (-11.9 F)
1914
-33.9 C (-29.0 F)
1915
-29.4 C (-20.9 F)
1916
-28.9 C (-20.0 F)
1917
-38.3 C (-36.9 F)
1918
-35.6 C (-32.1 F)
1919
-30.6 C (-23.1 F)
1920
-35.6 C (-32.1 F)
1921
-27.8 C (-18.0 F)
1922
-34.4 C (-29.9 F)
1923
-31.7 C (-25.1 F)
1924
-32.2 C (-26.0 F)
1925
-32.2 C (-26.0 F)
1926
-27.8 C (-18.0 F)
1927
-28.9 C (-20.0 F)
1928
-27.8 C (-18.0 F)
1929
-27.2 C (-17.0 F)
1930
-29.4 C (-20.9 F)
1931
-28.9 C (-20.0 F)
1932
-27.8 C (-18.0 F)
1933
-36.7 C (-34.1 F)
1934
-36.1 C (-33.0 F)
1935
-33.3 C (-27.9 F)
1936
-28.3 C (-18.9 F)
1937
-22.2 C (-8.0 F)
1938
-31.1 C (-24.0 F)
1939
-31.1 C (-24.0 F)
1940
-30.0 C (-22.0 F)
1941
-25.6 C (-14.1 F)
1942
-31.1 C (-24.0 F)
1943
-40.0 C (-40.0 F)
1944
-28.9 C (-20.0 F)
1945
-26.7 C (-16.1 F)
1946
-28.3 C (-18.9 F)
1947
-27.2 C (-17.0 F)
1948
-34.4 C (-29.9 F)
1949
-26.1 C (-15.0 F)
1950
-30.0 C (-22.0 F)
1951
-29.4 C (-20.9 F)
1952
-26.7 C (-16.1 F)
1953
-20.6 C (-5.1 F)
1954
-31.7 C (-25.1 F)
1955
-27.8 C (-18.0 F)
1956
-26.1 C (-15.0 F)
1957
-33.3 C (-27.9 F)
1958
-28.9 C (-20.0 F)
1959
-27.8 C (-18.0 F)
1960
-27.2 C (-17.0 F)
1961
-30.6 C (-23.1 F)
1962
-28.3 C (-18.9 F)
1963
-29.4 C (-20.9 F)
1964
-27.2 C (-17.0 F)
1965
-28.9 C (-20.0 F)
1966
-26.7 C (-16.1 F)
1967
-32.2 C (-26.0 F)
1968
-32.8 C (-27.0 F)
1969
-26.7 C (-16.1 F)
1970
-28.9 C (-20.0 F)
1971
-31.7 C (-25.1 F)
1972
-26.7 C (-16.1 F)
1973
-28.9 C (-20.0 F)
1974
-30.0 C (-22.0 F)
1975
-27.2 C (-17.0 F)
1976
-31.7 C (-25.1 F)
1977
-31.1 C (-24.0 F)
1978
-27.8 C (-18.0 F)
1979
-32.2 C (-26.0 F)
1980
-32.8 C (-27.0 F)
1981
-31.1 C (-24.0 F)
1982
-28.9 C (-20.0 F)
1983
-29.4 C (-20.9 F)
1984
-30.6 C (-23.1 F)
1985
-27.2 C (-17.0 F)
1986
-28.9 C (-20.0 F)
1987
-30.0 C (-22.0 F)
1988
-30.6 C (-23.1 F)
1989
-30.6 C (-23.1 F)
1990
-23.3 C (-9.9 F)
1991
-23.9 C (-11.0 F)
1992
-25.0 C (-13.0 F)
1993
-31.1 C (-24.0 F)
1994
-32.8 C (-27.0 F)
1995
-26.7 C (-16.1 F)
1996
-30.0 C (-22.0 F)
1997
-27.8 C (-18.0 F)
1998
-23.3 C (-9.9 F)
1999
-25.0 C (-13.0 F)
2000
-25.6 C (-14.1 F)
2001
-21.1 C (-6.0 F)
2002
-22.2 C (-8.0 F)
2003
-30.0 C (-22.0 F)
2004
-27.8 C (-18.0 F)
2005
-26.7 C (-16.1 F)
2006
-20.6 C (-5.1 F)
2007
-26.1 C (-15.0 F)
2008
-25.0 C (-13.0 F)
2009
-30.0 C (-22.0 F)
2010
-20.6 C (-5.1 F)
2011
-27.8 C (-18.0 F)
2012
-23.9 C (-11.0 F)
2013
-26.7 C (-16.1 F)
2014
-27.8 C (-18.0 F)
2015
-29.4 C (-20.9 F)
2016
-26.7 C (-16.1 F)
2017
-27.8 C (-18.0 F)
2018
-30.0 C (-22.0 F)
2019
-23.9 C (-11.0 F)
2020
-23.3 C (-9.9 F)
2021
-21.1 C (-6.0 F)
2022
-26.1 C (-15.0 F)
2023
-27.2 C (-17.0 F)
2024
-20.6 C (-5.1 F)
2025
-23.3 C (-9.9 F)
2026
-22.8 C (-9.0 F)
Wettest day (Rx1day)
The wettest day of the year at Hanover, 1884 to 2026. The record is 104.1 mm (4.1 in) in 1896, marked on the chart; the median year is 50.5 mm (2.0 in).
Wettest day (Rx1day) at Hanover by year
Year
Wettest day (Rx1day)
1884
35.3 mm (1.4 in)
1885
85.1 mm (3.4 in)
1886
27.9 mm (1.1 in)
1887
57.4 mm (2.3 in)
1888
76.2 mm (3.0 in)
1889
60.2 mm (2.4 in)
1890
58.2 mm (2.3 in)
1891
67.3 mm (2.6 in)
1892
61.0 mm (2.4 in)
1893
49.3 mm (1.9 in)
1894
37.3 mm (1.5 in)
1895
44.7 mm (1.8 in)
1896
104.1 mm (4.1 in)
1897
70.4 mm (2.8 in)
1898
68.6 mm (2.7 in)
1899
47.2 mm (1.9 in)
1900
49.0 mm (1.9 in)
1901
47.5 mm (1.9 in)
1902
45.0 mm (1.8 in)
1903
55.4 mm (2.2 in)
1904
55.6 mm (2.2 in)
1905
84.6 mm (3.3 in)
1906
65.8 mm (2.6 in)
1907
43.4 mm (1.7 in)
1908
38.1 mm (1.5 in)
1909
33.3 mm (1.3 in)
1910
74.7 mm (2.9 in)
1911
92.2 mm (3.6 in)
1912
47.0 mm (1.9 in)
1913
43.7 mm (1.7 in)
1914
43.2 mm (1.7 in)
1915
54.9 mm (2.2 in)
1916
45.0 mm (1.8 in)
1917
48.3 mm (1.9 in)
1918
43.9 mm (1.7 in)
1919
58.4 mm (2.3 in)
1920
57.7 mm (2.3 in)
1921
37.6 mm (1.5 in)
1922
38.4 mm (1.5 in)
1923
93.7 mm (3.7 in)
1924
62.5 mm (2.5 in)
1925
51.3 mm (2.0 in)
1926
64.3 mm (2.5 in)
1927
96.8 mm (3.8 in)
1928
35.8 mm (1.4 in)
1929
37.6 mm (1.5 in)
1930
30.7 mm (1.2 in)
1931
55.1 mm (2.2 in)
1932
49.0 mm (1.9 in)
1933
68.6 mm (2.7 in)
1934
58.4 mm (2.3 in)
1935
46.5 mm (1.8 in)
1936
36.8 mm (1.4 in)
1937
86.6 mm (3.4 in)
1938
68.1 mm (2.7 in)
1939
44.7 mm (1.8 in)
1940
56.9 mm (2.2 in)
1941
58.4 mm (2.3 in)
1942
49.3 mm (1.9 in)
1943
37.3 mm (1.5 in)
1944
40.4 mm (1.6 in)
1945
49.0 mm (1.9 in)
1946
43.9 mm (1.7 in)
1947
45.7 mm (1.8 in)
1948
42.7 mm (1.7 in)
1949
33.5 mm (1.3 in)
1950
56.9 mm (2.2 in)
1951
49.5 mm (1.9 in)
1952
73.7 mm (2.9 in)
1953
49.3 mm (1.9 in)
1954
54.4 mm (2.1 in)
1955
73.9 mm (2.9 in)
1956
49.3 mm (1.9 in)
1957
42.4 mm (1.7 in)
1958
36.8 mm (1.4 in)
1959
62.2 mm (2.4 in)
1960
81.5 mm (3.2 in)
1961
34.0 mm (1.3 in)
1962
56.9 mm (2.2 in)
1963
31.0 mm (1.2 in)
1964
40.9 mm (1.6 in)
1965
43.2 mm (1.7 in)
1966
35.6 mm (1.4 in)
1967
46.7 mm (1.8 in)
1968
75.7 mm (3.0 in)
1969
90.9 mm (3.6 in)
1970
41.9 mm (1.6 in)
1971
68.1 mm (2.7 in)
1972
42.2 mm (1.7 in)
1973
61.0 mm (2.4 in)
1974
33.0 mm (1.3 in)
1975
59.9 mm (2.4 in)
1976
55.6 mm (2.2 in)
1977
42.9 mm (1.7 in)
1978
42.2 mm (1.7 in)
1979
50.5 mm (2.0 in)
1980
22.9 mm (0.9 in)
1981
62.7 mm (2.5 in)
1982
55.9 mm (2.2 in)
1983
101.3 mm (4.0 in)
1984
81.3 mm (3.2 in)
1985
50.8 mm (2.0 in)
1986
51.6 mm (2.0 in)
1987
77.2 mm (3.0 in)
1988
50.3 mm (2.0 in)
1989
50.8 mm (2.0 in)
1990
50.0 mm (2.0 in)
1991
51.1 mm (2.0 in)
1992
41.1 mm (1.6 in)
1993
50.8 mm (2.0 in)
1994
50.8 mm (2.0 in)
1995
45.2 mm (1.8 in)
1996
87.6 mm (3.4 in)
1997
40.6 mm (1.6 in)
1998
48.3 mm (1.9 in)
1999
81.8 mm (3.2 in)
2000
61.2 mm (2.4 in)
2001
49.3 mm (1.9 in)
2002
39.4 mm (1.6 in)
2003
54.6 mm (2.1 in)
2004
44.5 mm (1.8 in)
2005
68.8 mm (2.7 in)
2006
48.5 mm (1.9 in)
2007
66.0 mm (2.6 in)
2008
71.4 mm (2.8 in)
2009
70.4 mm (2.8 in)
2010
67.6 mm (2.7 in)
2011
61.7 mm (2.4 in)
2012
32.3 mm (1.3 in)
2013
45.5 mm (1.8 in)
2014
35.8 mm (1.4 in)
2015
70.6 mm (2.8 in)
2016
30.7 mm (1.2 in)
2017
51.6 mm (2.0 in)
2018
48.3 mm (1.9 in)
2019
50.5 mm (2.0 in)
2020
60.2 mm (2.4 in)
2021
36.3 mm (1.4 in)
2022
51.1 mm (2.0 in)
2023
75.2 mm (3.0 in)
2024
46.0 mm (1.8 in)
2025
46.2 mm (1.8 in)
2026
35.3 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hanover, 1884 to 2026. The record is 201.2 mm (7.9 in) in 2023, marked on the chart; the median year is 75.0 mm (3.0 in).
Wettest five days (Rx5day) at Hanover by year
Year
Wettest five days (Rx5day)
1884
43.9 mm (1.7 in)
1885
103.9 mm (4.1 in)
1886
51.6 mm (2.0 in)
1887
129.2 mm (5.1 in)
1888
99.0 mm (3.9 in)
1889
83.7 mm (3.3 in)
1890
68.6 mm (2.7 in)
1891
44.5 mm (1.8 in)
1892
87.4 mm (3.4 in)
1893
69.1 mm (2.7 in)
1894
51.9 mm (2.0 in)
1895
76.2 mm (3.0 in)
1896
58.9 mm (2.3 in)
1897
93.3 mm (3.7 in)
1898
89.9 mm (3.5 in)
1899
55.5 mm (2.2 in)
1900
59.0 mm (2.3 in)
1901
64.3 mm (2.5 in)
1902
71.2 mm (2.8 in)
1903
84.6 mm (3.3 in)
1904
66.1 mm (2.6 in)
1905
96.2 mm (3.8 in)
1906
115.2 mm (4.5 in)
1907
54.3 mm (2.1 in)
1908
52.1 mm (2.1 in)
1909
70.6 mm (2.8 in)
1910
79.0 mm (3.1 in)
1911
131.8 mm (5.2 in)
1912
85.1 mm (3.4 in)
1913
94.5 mm (3.7 in)
1914
53.7 mm (2.1 in)
1915
82.9 mm (3.3 in)
1916
61.3 mm (2.4 in)
1917
83.6 mm (3.3 in)
1918
86.3 mm (3.4 in)
1919
84.9 mm (3.3 in)
1920
80.5 mm (3.2 in)
1921
52.1 mm (2.1 in)
1922
101.6 mm (4.0 in)
1923
105.1 mm (4.1 in)
1924
113.8 mm (4.5 in)
1925
101.1 mm (4.0 in)
1926
92.5 mm (3.6 in)
1927
42.7 mm (1.7 in)
1928
55.3 mm (2.2 in)
1929
67.6 mm (2.7 in)
1930
36.8 mm (1.4 in)
1931
113.8 mm (4.5 in)
1932
55.2 mm (2.2 in)
1933
76.2 mm (3.0 in)
1934
49.0 mm (1.9 in)
1935
58.5 mm (2.3 in)
1936
54.8 mm (2.2 in)
1937
88.0 mm (3.5 in)
1938
137.5 mm (5.4 in)
1939
70.1 mm (2.8 in)
1940
80.1 mm (3.2 in)
1941
97.3 mm (3.8 in)
1942
69.1 mm (2.7 in)
1943
71.6 mm (2.8 in)
1944
74.4 mm (2.9 in)
1945
95.2 mm (3.7 in)
1946
68.6 mm (2.7 in)
1947
92.4 mm (3.6 in)
1948
59.2 mm (2.3 in)
1949
62.0 mm (2.4 in)
1950
70.3 mm (2.8 in)
1951
69.2 mm (2.7 in)
1952
96.6 mm (3.8 in)
1953
54.9 mm (2.2 in)
1954
74.9 mm (2.9 in)
1955
144.5 mm (5.7 in)
1956
59.3 mm (2.3 in)
1957
57.7 mm (2.3 in)
1958
58.9 mm (2.3 in)
1959
90.9 mm (3.6 in)
1960
123.9 mm (4.9 in)
1961
62.5 mm (2.5 in)
1962
125.7 mm (4.9 in)
1963
64.3 mm (2.5 in)
1964
79.2 mm (3.1 in)
1965
57.9 mm (2.3 in)
1966
59.4 mm (2.3 in)
1967
62.9 mm (2.5 in)
1968
76.2 mm (3.0 in)
1969
141.7 mm (5.6 in)
1970
57.4 mm (2.3 in)
1971
80.8 mm (3.2 in)
1972
68.9 mm (2.7 in)
1973
113.6 mm (4.5 in)
1974
49.7 mm (2.0 in)
1975
99.8 mm (3.9 in)
1976
73.6 mm (2.9 in)
1977
68.3 mm (2.7 in)
1978
54.9 mm (2.2 in)
1979
80.2 mm (3.2 in)
1980
33.8 mm (1.3 in)
1981
85.1 mm (3.4 in)
1982
61.3 mm (2.4 in)
1983
116.7 mm (4.6 in)
1984
159.1 mm (6.3 in)
1985
62.8 mm (2.5 in)
1986
115.9 mm (4.6 in)
1987
105.7 mm (4.2 in)
1988
77.3 mm (3.0 in)
1989
80.9 mm (3.2 in)
1990
106.6 mm (4.2 in)
1991
72.2 mm (2.8 in)
1992
63.7 mm (2.5 in)
1993
81.0 mm (3.2 in)
1994
81.6 mm (3.2 in)
1995
57.4 mm (2.3 in)
1996
99.8 mm (3.9 in)
1997
68.6 mm (2.7 in)
1998
74.8 mm (2.9 in)
1999
152.5 mm (6.0 in)
2000
76.2 mm (3.0 in)
2001
77.7 mm (3.1 in)
2002
48.8 mm (1.9 in)
2003
88.8 mm (3.5 in)
2004
75.0 mm (3.0 in)
2005
138.6 mm (5.5 in)
2006
102.3 mm (4.0 in)
2007
84.4 mm (3.3 in)
2008
129.3 mm (5.1 in)
2009
120.8 mm (4.8 in)
2010
151.1 mm (5.9 in)
2011
75.4 mm (3.0 in)
2012
70.4 mm (2.8 in)
2013
74.2 mm (2.9 in)
2014
44.1 mm (1.7 in)
2015
77.0 mm (3.0 in)
2016
43.2 mm (1.7 in)
2017
97.9 mm (3.9 in)
2018
43.7 mm (1.7 in)
2019
69.1 mm (2.7 in)
2020
74.0 mm (2.9 in)
2021
46.0 mm (1.8 in)
2022
62.4 mm (2.5 in)
2023
201.2 mm (7.9 in)
2024
77.3 mm (3.0 in)
2025
73.9 mm (2.9 in)
2026
45.0 mm (1.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hanover, 1884 to 2026. The record is 35 days in 1915, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Hanover by year
Year
Longest dry spell (CDD)
1884
8 days
1885
19 days
1886
14 days
1887
25 days
1888
15 days
1889
24 days
1890
17 days
1891
17 days
1892
11 days
1893
11 days
1894
16 days
1895
14 days
1896
26 days
1897
17 days
1898
14 days
1899
11 days
1900
10 days
1901
25 days
1902
14 days
1903
20 days
1904
18 days
1905
22 days
1906
10 days
1907
13 days
1908
25 days
1909
14 days
1910
16 days
1911
17 days
1912
19 days
1913
14 days
1914
23 days
1915
35 days
1916
11 days
1917
22 days
1918
24 days
1919
19 days
1920
20 days
1921
16 days
1922
16 days
1923
16 days
1924
24 days
1925
14 days
1926
12 days
1927
4 days
1928
5 days
1929
6 days
1930
4 days
1931
9 days
1932
5 days
1933
4 days
1934
12 days
1935
17 days
1936
15 days
1937
19 days
1938
23 days
1939
20 days
1940
21 days
1941
30 days
1942
17 days
1943
16 days
1944
18 days
1945
17 days
1946
15 days
1947
28 days
1948
13 days
1949
13 days
1950
16 days
1951
14 days
1952
20 days
1953
25 days
1954
15 days
1955
15 days
1956
15 days
1957
16 days
1958
26 days
1959
17 days
1960
11 days
1961
17 days
1962
12 days
1963
20 days
1964
17 days
1965
14 days
1966
14 days
1967
14 days
1968
13 days
1969
16 days
1970
17 days
1971
17 days
1972
11 days
1973
15 days
1974
13 days
1975
14 days
1976
17 days
1977
19 days
1978
23 days
1979
17 days
1980
23 days
1981
19 days
1982
15 days
1983
16 days
1984
15 days
1985
18 days
1986
13 days
1987
19 days
1988
23 days
1989
15 days
1990
12 days
1991
23 days
1992
12 days
1993
12 days
1994
11 days
1995
17 days
1996
11 days
1997
21 days
1998
13 days
1999
17 days
2000
19 days
2001
19 days
2002
12 days
2003
21 days
2004
24 days
2005
19 days
2006
12 days
2007
15 days
2008
15 days
2009
21 days
2010
16 days
2011
11 days
2012
16 days
2013
13 days
2014
17 days
2015
12 days
2016
15 days
2017
15 days
2018
15 days
2019
15 days
2020
14 days
2021
16 days
2022
16 days
2023
17 days
2024
18 days
2025
10 days
2026
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
121 years with a frost
Across 121 years with a frost, the median last spring frost at Hanover falls on 16 May and the median first autumn frost on 30 September, which leaves a median of 137 days between them.
In 1988 to 2024 the median growing season was 158 days. That is 34 days more than in 1894 to 1923.
Fitted over all years, the growing season changes by +2.8 days per decade at this station.
Frost dates and growing season at Hanover
Measure
Median, all years
Earliest period (1894 to 1923)
Recent period (1988 to 2024)
Recent against earliest
Fitted trend
Last spring frost
16 May
18 May
7 May
11 days earlier
-1.2 days per decade
First autumn frost
30 September
25 September
11 October
16 days later
+1.6 days per decade
Growing days
137 days
124 days
158 days
34 days more
+2.8 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
112 years, 1885 to 2024
A day with at least 51.6 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 108.6 mm (4.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Hanover: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
51.6 mm (2.0 in)
5 years
65.6 mm (2.6 in)
10 years
75.4 mm (3.0 in)
25 years
88.3 mm (3.5 in)
50 years
98.3 mm (3.9 in)
100 years
108.6 mm (4.3 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 112 years of values from 1885 to 2024.
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: 101.3 mm (4.0 in) in 1983; 93.7 mm (3.7 in) in 1923; 92.2 mm (3.6 in) in 1911.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Hanover, at 2013. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 2013 ran 0.3 C (0.6 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Hanover, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
2013
+0.3
+0.6
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 Hanover standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hanover 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.