Record envelope, standing records and threshold days for Waterville (USC00459012), Washington, United States, with 129 years of record.
Key Facts for Waterville
Waterville (USC00459012) is a weather station in Washington, United States at 47.65 latitude and -120.08 longitude, 812 m (2,664 ft) above sea level.
The station reports from 1893 to 2021, 129 years of record.
1,464 records set at Waterville still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Waterville set a monthly record daily precipitation of 38.1 mm (1.5 in) on 15 January 2020.
About the Station
Location: Washington, United States, 47.65 latitude, -120.08 longitude.
Elevation: 812 m (2,664 ft).
Period of record: 1893 to 2021, 129 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 Waterville. 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 Waterville, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Feb
15.0 C (59.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-23.3 C (-9.9 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-11.7 C (10.9 F)
n/a
n/a
May
35.6 C (96.1 F)
-8.9 C (16.0 F)
n/a
n/a
Jun
38.9 C (102.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
0.0 C (32.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
-1.7 C (28.9 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-9.4 C (15.1 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-15.6 C (3.9 F)
n/a
n/a
Nov
20.0 C (68.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Dec
13.3 C (55.9 F)
-36.1 C (-33.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Waterville still stand. 1899 holds the most, with 38.
Standing records at Waterville by the year they were set
Year set
Standing records
1893
23
1894
19
1895
13
1896
32
1897
32
1898
12
1899
38
1900
24
1901
14
1902
8
1903
6
1904
9
1905
11
1906
15
1907
17
1908
10
1909
17
1910
20
1911
17
1912
14
1913
7
1914
4
1915
10
1916
11
1917
11
1918
5
1919
22
1920
9
1921
7
1922
13
1923
3
1924
24
1925
16
1926
17
1927
14
1928
7
1929
11
1930
12
1931
4
1932
12
1933
19
1934
13
1935
14
1936
35
1937
7
1938
5
1939
11
1940
9
1941
6
1942
4
1943
18
1944
4
1945
13
1946
7
1947
16
1948
12
1949
8
1950
16
1951
13
1952
2
1953
9
1954
6
1955
24
1956
14
1957
6
1958
8
1959
6
1960
17
1961
6
1962
6
1963
2
1964
12
1965
9
1966
8
1967
23
1968
23
1969
14
1970
6
1971
20
1972
13
1973
4
1974
7
1975
10
1976
5
1977
11
1978
2
1979
7
1980
6
1981
8
1982
3
1983
13
1984
3
1985
21
1986
7
1987
6
1988
15
1989
6
1990
7
1991
9
1992
27
1993
13
1994
38
1995
8
1996
11
1997
7
1998
9
1999
5
2000
2
2001
1
2002
12
2003
12
2004
11
2005
15
2006
10
2007
3
2008
8
2009
12
2010
2
2011
11
2012
6
2013
7
2014
8
2015
20
2016
4
2017
2
2018
13
2019
3
All-Time Record Progression
8 new records
8 all-time records were set at Waterville between 11 June 1948 and 22 July 1994. Each dot is a new record.
When Waterville set new all-time records
Date
Kind
Detail
1948-06-11
Record daily precipitation
Record daily precipitation 70.9 mm (2.8 in)
1968-12-29
Record low minimum temperature
Record low minimum temperature -35.0 C (-31.0 F)
1968-12-30
Record low minimum temperature
Record low minimum temperature -36.1 C (-33.0 F)
1969-01-19
Record snow depth
Record snow depth 104.1 cm (41.0 in)
1969-01-26
Record snow depth
Record snow depth 109.2 cm (43.0 in)
1969-01-27
Record snow depth
Record snow depth 111.8 cm (44.0 in)
1969-01-30
Record snow depth
Record snow depth 114.3 cm (45.0 in)
1994-07-22
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
Wettest Day of Each Month
Jun: 70.9 mm (2.8 in)
The wettest day on record for each calendar month at Waterville. The most was 70.9 mm (2.8 in) on 11 June 1948.
Record daily precipitation for each month at Waterville
Month
Record daily precipitation (mm)
Date
Jan
38.1 mm (1.5 in)
15 January 2020
Feb
25.4 mm (1.0 in)
11 February 1897
Mar
38.1 mm (1.5 in)
10 March 1904
Apr
24.1 mm (0.9 in)
10 April 1912
May
43.2 mm (1.7 in)
20 May 1893
Jun
70.9 mm (2.8 in)
11 June 1948
Jul
48.3 mm (1.9 in)
14 July 1908
Aug
41.9 mm (1.6 in)
25 August 1983
Sep
36.8 mm (1.4 in)
9 September 1952
Oct
34.5 mm (1.4 in)
18 October 1920
Nov
57.2 mm (2.3 in)
27 November 1910
Dec
40.6 mm (1.6 in)
13 December 1897
Period of Record Coverage
1893 to 2021
Complete yearUnder 90 percent of days
129 years of record at Waterville, 1893 to 2021. 30 years have data for under 90 percent of days and are left out of rankings: 1895, 1898, 1908, 1909, 1910, 1913, 1914, 1926 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 89 complete years at Waterville, 1893 to 2017. Blue stripes are years cooler than the station's own mean of 7.3 C (45.2 F); red stripes are warmer. The coolest year was 1893, at 5.6 C (42.0 F), and the warmest was 1994, at 10.4 C (50.8 F). The strongest colour marks a difference of 3.2 C (5.8 F).
Annual mean temperature at Waterville as warming stripes, 1893 to 2017
Year
Annual mean temperature
Difference from the station mean
1893
5.6 C
-1.78 C
1896
6.6 C
-0.79 C
1897
6.2 C
-1.15 C
1899
7.0 C
-0.30 C
1900
8.0 C
+0.63 C
1901
7.3 C
+0.00 C
1902
6.9 C
-0.45 C
1903
6.4 C
-0.94 C
1904
7.4 C
+0.09 C
1905
7.1 C
-0.28 C
1906
7.8 C
+0.41 C
1911
6.2 C
-1.17 C
1915
7.8 C
+0.44 C
1916
5.7 C
-1.61 C
1917
7.3 C
-0.02 C
1918
8.2 C
+0.85 C
1919
6.3 C
-1.03 C
1921
7.0 C
-0.36 C
1922
6.3 C
-1.06 C
1923
7.8 C
+0.49 C
1924
7.6 C
+0.23 C
1925
8.8 C
+1.44 C
1927
6.8 C
-0.59 C
1928
8.0 C
+0.69 C
1929
6.9 C
-0.43 C
1930
7.0 C
-0.38 C
1931
7.3 C
-0.09 C
1932
7.1 C
-0.27 C
1933
7.1 C
-0.23 C
1934
9.5 C
+2.19 C
1935
7.0 C
-0.31 C
1936
7.3 C
-0.09 C
1937
6.5 C
-0.85 C
1938
7.7 C
+0.36 C
1939
8.2 C
+0.88 C
1941
8.1 C
+0.71 C
1942
7.0 C
-0.30 C
1943
6.7 C
-0.61 C
1944
7.4 C
+0.02 C
1945
7.3 C
-0.07 C
1947
8.0 C
+0.63 C
1948
6.1 C
-1.25 C
1949
7.1 C
-0.27 C
1950
6.2 C
-1.13 C
1951
6.6 C
-0.72 C
1952
7.5 C
+0.16 C
1954
6.9 C
-0.45 C
1955
5.8 C
-1.53 C
1956
6.8 C
-0.55 C
1957
7.0 C
-0.35 C
1958
8.9 C
+1.58 C
1959
6.7 C
-0.64 C
1960
7.4 C
+0.04 C
1962
6.9 C
-0.41 C
1964
6.3 C
-1.07 C
1965
7.9 C
+0.60 C
1966
8.1 C
+0.80 C
1967
8.7 C
+1.33 C
1969
6.7 C
-0.68 C
1970
7.3 C
-0.08 C
1973
7.9 C
+0.52 C
1974
8.1 C
+0.74 C
1975
6.9 C
-0.45 C
1976
7.2 C
-0.15 C
1977
7.7 C
+0.35 C
1978
7.2 C
-0.17 C
1981
8.2 C
+0.84 C
1982
6.9 C
-0.47 C
1983
7.7 C
+0.34 C
1984
6.8 C
-0.56 C
1985
6.3 C
-1.00 C
1986
8.2 C
+0.90 C
1993
7.5 C
+0.12 C
1994
10.4 C
+3.10 C
1995
8.8 C
+1.47 C
2000
6.5 C
-0.81 C
2001
7.1 C
-0.26 C
2002
6.6 C
-0.72 C
2003
7.8 C
+0.47 C
2006
8.3 C
+0.92 C
2007
7.7 C
+0.33 C
2009
7.4 C
+0.08 C
2011
6.8 C
-0.57 C
2012
8.0 C
+0.68 C
2013
8.0 C
+0.63 C
2014
8.5 C
+1.12 C
2015
9.3 C
+1.91 C
2016
8.1 C
+0.71 C
2017
6.9 C
-0.43 C
The annual mean temperature here has risen by 0.08 C (0.03 to 0.13) per decade over 1893 to 2017. In Fahrenheit: 0.13 F (0.05 to 0.23) per decade. The slope is a straight line fitted to 89 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Waterville
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.08 C (0.03 to 0.13) per decade
0.14 F (0.05 to 0.23) per decade
1893 to 2017
89
Rise
Mean daily maximum
0.04 C (-0.01 to 0.10) per decade
0.08 F (-0.03 to 0.18) per decade
1893 to 2017
89
Not clearly different from zero
Mean daily minimum
0.1 C (0.1 to 0.2) per decade
0.2 F (0.1 to 0.3) per decade
1893 to 2017
89
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
1893 to 2021
Yearly extremes at Waterville: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1994
36.1 C (97.0 F)
129
Coldest night (TNn)
-36.1 C (-33.0 F)
1968
-21.7 C (-7.1 F)
128
Wettest day (Rx1day)
70.9 mm (2.8 in)
1948
22.1 mm (0.9 in)
129
Wettest five days (Rx5day)
90.9 mm (3.6 in)
1936
36.6 mm (1.4 in)
127
Longest dry spell (CDD)
108 days
1998
47 days
129
Hottest day (TXx)
The hottest day of the year at Waterville, 1893 to 2021. The record is 40.6 C (105.1 F) in 1994, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Waterville by year
Year
Hottest day (TXx)
1893
36.1 C (97.0 F)
1894
36.7 C (98.1 F)
1895
36.7 C (98.1 F)
1896
38.3 C (100.9 F)
1897
38.9 C (102.0 F)
1898
37.8 C (100.0 F)
1899
39.4 C (102.9 F)
1900
38.9 C (102.0 F)
1901
37.8 C (100.0 F)
1902
39.4 C (102.9 F)
1903
36.7 C (98.1 F)
1904
37.8 C (100.0 F)
1905
37.8 C (100.0 F)
1906
37.8 C (100.0 F)
1907
36.1 C (97.0 F)
1908
35.0 C (95.0 F)
1909
36.1 C (97.0 F)
1910
36.1 C (97.0 F)
1911
40.0 C (104.0 F)
1912
36.7 C (98.1 F)
1913
30.0 C (86.0 F)
1914
29.4 C (84.9 F)
1915
35.6 C (96.1 F)
1916
35.0 C (95.0 F)
1917
35.6 C (96.1 F)
1918
36.7 C (98.1 F)
1919
36.1 C (97.0 F)
1920
36.7 C (98.1 F)
1921
35.6 C (96.1 F)
1922
35.6 C (96.1 F)
1923
36.7 C (98.1 F)
1924
40.0 C (104.0 F)
1925
35.6 C (96.1 F)
1926
37.8 C (100.0 F)
1927
35.6 C (96.1 F)
1928
40.0 C (104.0 F)
1929
37.2 C (99.0 F)
1930
36.7 C (98.1 F)
1931
35.6 C (96.1 F)
1932
33.9 C (93.0 F)
1933
35.6 C (96.1 F)
1934
37.2 C (99.0 F)
1935
37.2 C (99.0 F)
1936
36.7 C (98.1 F)
1937
33.9 C (93.0 F)
1938
35.0 C (95.0 F)
1939
37.8 C (100.0 F)
1940
32.8 C (91.0 F)
1941
35.0 C (95.0 F)
1942
34.4 C (93.9 F)
1943
31.1 C (88.0 F)
1944
33.3 C (91.9 F)
1945
32.8 C (91.0 F)
1946
33.3 C (91.9 F)
1947
32.8 C (91.0 F)
1948
31.7 C (89.1 F)
1949
35.0 C (95.0 F)
1950
32.8 C (91.0 F)
1951
32.2 C (90.0 F)
1952
35.0 C (95.0 F)
1953
35.6 C (96.1 F)
1954
33.9 C (93.0 F)
1955
36.7 C (98.1 F)
1956
36.1 C (97.0 F)
1957
32.2 C (90.0 F)
1958
36.1 C (97.0 F)
1959
36.7 C (98.1 F)
1960
37.8 C (100.0 F)
1961
40.0 C (104.0 F)
1962
35.6 C (96.1 F)
1963
35.6 C (96.1 F)
1964
36.1 C (97.0 F)
1965
37.8 C (100.0 F)
1966
36.7 C (98.1 F)
1967
39.4 C (102.9 F)
1968
37.8 C (100.0 F)
1969
35.0 C (95.0 F)
1970
36.7 C (98.1 F)
1971
38.3 C (100.9 F)
1972
37.8 C (100.0 F)
1973
36.7 C (98.1 F)
1974
35.6 C (96.1 F)
1975
38.3 C (100.9 F)
1976
33.9 C (93.0 F)
1977
37.8 C (100.0 F)
1978
37.2 C (99.0 F)
1979
33.9 C (93.0 F)
1980
35.6 C (96.1 F)
1981
37.2 C (99.0 F)
1982
36.7 C (98.1 F)
1983
33.9 C (93.0 F)
1984
35.6 C (96.1 F)
1985
37.2 C (99.0 F)
1986
36.1 C (97.0 F)
1987
35.6 C (96.1 F)
1988
36.7 C (98.1 F)
1989
33.9 C (93.0 F)
1990
38.3 C (100.9 F)
1991
36.1 C (97.0 F)
1992
38.3 C (100.9 F)
1993
31.1 C (88.0 F)
1994
40.6 C (105.1 F)
1995
35.0 C (95.0 F)
1996
37.2 C (99.0 F)
1997
35.6 C (96.1 F)
1998
38.9 C (102.0 F)
1999
35.6 C (96.1 F)
2000
35.6 C (96.1 F)
2001
35.0 C (95.0 F)
2002
37.2 C (99.0 F)
2003
37.8 C (100.0 F)
2004
37.8 C (100.0 F)
2005
35.6 C (96.1 F)
2006
39.4 C (102.9 F)
2007
37.2 C (99.0 F)
2008
37.8 C (100.0 F)
2009
37.2 C (99.0 F)
2010
33.9 C (93.0 F)
2011
33.9 C (93.0 F)
2012
36.1 C (97.0 F)
2013
36.1 C (97.0 F)
2014
38.3 C (100.9 F)
2015
38.9 C (102.0 F)
2016
33.9 C (93.0 F)
2017
37.2 C (99.0 F)
2018
37.2 C (99.0 F)
2019
33.3 C (91.9 F)
2020
6.7 C (44.1 F)
2021
10.0 C (50.0 F)
Coldest night (TNn)
The coldest night of the year at Waterville, 1893 to 2021. The record is -36.1 C (-33.0 F) in 1968, marked on the chart; the median year is -21.7 C (-7.1 F).
Coldest night (TNn) at Waterville by year
Year
Coldest night (TNn)
1893
-34.4 C (-29.9 F)
1894
-22.2 C (-8.0 F)
1895
-18.9 C (-2.0 F)
1896
-29.4 C (-20.9 F)
1897
-26.1 C (-15.0 F)
1898
-21.1 C (-6.0 F)
1899
-27.8 C (-18.0 F)
1900
-23.9 C (-11.0 F)
1901
-25.0 C (-13.0 F)
1902
-25.0 C (-13.0 F)
1903
-20.6 C (-5.1 F)
1904
-23.3 C (-9.9 F)
1905
-27.2 C (-17.0 F)
1906
-17.8 C (0.0 F)
1907
-25.0 C (-13.0 F)
1908
-25.6 C (-14.1 F)
1909
-33.9 C (-29.0 F)
1910
-24.4 C (-11.9 F)
1911
-27.8 C (-18.0 F)
1912
-26.1 C (-15.0 F)
1913
-23.9 C (-11.0 F)
1914
-22.2 C (-8.0 F)
1915
-22.8 C (-9.0 F)
1916
-31.1 C (-24.0 F)
1917
-26.7 C (-16.1 F)
1918
-19.4 C (-2.9 F)
1919
-28.3 C (-18.9 F)
1920
-15.0 C (5.0 F)
1921
-20.0 C (-4.0 F)
1922
-29.4 C (-20.9 F)
1923
-23.3 C (-9.9 F)
1924
-28.3 C (-18.9 F)
1925
-16.7 C (1.9 F)
1926
-21.7 C (-7.1 F)
1927
-29.4 C (-20.9 F)
1928
-17.8 C (0.0 F)
1929
-26.1 C (-15.0 F)
1930
-28.3 C (-18.9 F)
1931
-18.9 C (-2.0 F)
1932
-24.4 C (-11.9 F)
1933
-27.8 C (-18.0 F)
1934
-14.4 C (6.1 F)
1935
-28.9 C (-20.0 F)
1936
-28.9 C (-20.0 F)
1937
-25.6 C (-14.1 F)
1938
-15.6 C (3.9 F)
1939
-23.3 C (-9.9 F)
1940
-15.6 C (3.9 F)
1941
-14.4 C (6.1 F)
1942
-21.1 C (-6.0 F)
1943
-28.9 C (-20.0 F)
1944
-18.9 C (-2.0 F)
1945
-15.0 C (5.0 F)
1946
-16.1 C (3.0 F)
1947
-21.7 C (-7.1 F)
1948
-20.6 C (-5.1 F)
1949
-23.9 C (-11.0 F)
1950
-31.1 C (-24.0 F)
1951
-22.8 C (-9.0 F)
1952
-21.7 C (-7.1 F)
1953
-12.2 C (10.0 F)
1954
-23.3 C (-9.9 F)
1955
-23.3 C (-9.9 F)
1956
-25.6 C (-14.1 F)
1957
-26.7 C (-16.1 F)
1958
-16.1 C (3.0 F)
1959
-26.1 C (-15.0 F)
1960
-21.1 C (-6.0 F)
1961
-18.3 C (-0.9 F)
1962
-22.2 C (-8.0 F)
1963
-18.3 C (-0.9 F)
1964
-31.7 C (-25.1 F)
1965
-22.2 C (-8.0 F)
1966
-17.8 C (0.0 F)
1967
-16.1 C (3.0 F)
1968
-36.1 C (-33.0 F)
1969
-30.0 C (-22.0 F)
1970
-20.0 C (-4.0 F)
1971
-21.7 C (-7.1 F)
1972
-24.4 C (-11.9 F)
1973
-21.1 C (-6.0 F)
1974
-23.9 C (-11.0 F)
1975
-21.7 C (-7.1 F)
1976
-18.3 C (-0.9 F)
1977
-19.4 C (-2.9 F)
1978
-27.8 C (-18.0 F)
1979
-28.9 C (-20.0 F)
1980
-20.6 C (-5.1 F)
1981
-20.6 C (-5.1 F)
1982
-27.8 C (-18.0 F)
1983
-30.6 C (-23.1 F)
1984
-23.9 C (-11.0 F)
1985
-25.6 C (-14.1 F)
1986
-19.4 C (-2.9 F)
1987
-18.3 C (-0.9 F)
1988
-20.6 C (-5.1 F)
1989
-21.7 C (-7.1 F)
1990
-18.9 C (-2.0 F)
1991
-16.7 C (1.9 F)
1992
-19.4 C (-2.9 F)
1993
-23.9 C (-11.0 F)
1994
-17.8 C (0.0 F)
1995
-20.6 C (-5.1 F)
1996
-26.7 C (-16.1 F)
1997
-18.3 C (-0.9 F)
1998
-19.4 C (-2.9 F)
1999
-13.9 C (7.0 F)
2000
-21.7 C (-7.1 F)
2001
-18.9 C (-2.0 F)
2002
-17.2 C (1.0 F)
2003
-19.4 C (-2.9 F)
2004
-26.1 C (-15.0 F)
2005
-18.3 C (-0.9 F)
2006
-20.0 C (-4.0 F)
2007
-22.2 C (-8.0 F)
2008
-25.6 C (-14.1 F)
2009
-20.0 C (-4.0 F)
2010
-24.4 C (-11.9 F)
2011
-20.6 C (-5.1 F)
2012
-16.7 C (1.9 F)
2013
-20.0 C (-4.0 F)
2014
-23.9 C (-11.0 F)
2015
-16.1 C (3.0 F)
2016
-20.6 C (-5.1 F)
2017
-20.6 C (-5.1 F)
2018
-14.4 C (6.1 F)
2019
-19.4 C (-2.9 F)
2020
-16.1 C (3.0 F)
2021
n/a
Wettest day (Rx1day)
The wettest day of the year at Waterville, 1893 to 2021. The record is 70.9 mm (2.8 in) in 1948, marked on the chart; the median year is 22.1 mm (0.9 in).
Wettest day (Rx1day) at Waterville by year
Year
Wettest day (Rx1day)
1893
43.2 mm (1.7 in)
1894
25.4 mm (1.0 in)
1895
20.3 mm (0.8 in)
1896
27.9 mm (1.1 in)
1897
40.6 mm (1.6 in)
1898
22.4 mm (0.9 in)
1899
26.7 mm (1.1 in)
1900
27.4 mm (1.1 in)
1901
25.4 mm (1.0 in)
1902
30.5 mm (1.2 in)
1903
25.4 mm (1.0 in)
1904
38.1 mm (1.5 in)
1905
35.6 mm (1.4 in)
1906
27.9 mm (1.1 in)
1907
20.3 mm (0.8 in)
1908
48.3 mm (1.9 in)
1909
16.5 mm (0.6 in)
1910
57.2 mm (2.3 in)
1911
21.3 mm (0.8 in)
1912
28.2 mm (1.1 in)
1913
13.7 mm (0.5 in)
1914
20.3 mm (0.8 in)
1915
15.2 mm (0.6 in)
1916
25.4 mm (1.0 in)
1917
27.9 mm (1.1 in)
1918
27.9 mm (1.1 in)
1919
20.3 mm (0.8 in)
1920
34.5 mm (1.4 in)
1921
15.0 mm (0.6 in)
1922
16.8 mm (0.7 in)
1923
20.6 mm (0.8 in)
1924
13.5 mm (0.5 in)
1925
25.4 mm (1.0 in)
1926
19.6 mm (0.8 in)
1927
23.6 mm (0.9 in)
1928
21.6 mm (0.9 in)
1929
12.7 mm (0.5 in)
1930
19.3 mm (0.8 in)
1931
12.2 mm (0.5 in)
1932
12.2 mm (0.5 in)
1933
30.5 mm (1.2 in)
1934
16.3 mm (0.6 in)
1935
11.2 mm (0.4 in)
1936
47.2 mm (1.9 in)
1937
19.1 mm (0.8 in)
1938
18.5 mm (0.7 in)
1939
14.5 mm (0.6 in)
1940
18.5 mm (0.7 in)
1941
28.2 mm (1.1 in)
1942
19.1 mm (0.8 in)
1943
26.4 mm (1.0 in)
1944
19.1 mm (0.8 in)
1945
20.3 mm (0.8 in)
1946
22.9 mm (0.9 in)
1947
19.3 mm (0.8 in)
1948
70.9 mm (2.8 in)
1949
16.0 mm (0.6 in)
1950
16.3 mm (0.6 in)
1951
22.1 mm (0.9 in)
1952
36.8 mm (1.4 in)
1953
25.4 mm (1.0 in)
1954
30.7 mm (1.2 in)
1955
27.9 mm (1.1 in)
1956
28.4 mm (1.1 in)
1957
17.5 mm (0.7 in)
1958
42.4 mm (1.7 in)
1959
17.3 mm (0.7 in)
1960
13.2 mm (0.5 in)
1961
15.2 mm (0.6 in)
1962
28.7 mm (1.1 in)
1963
16.3 mm (0.6 in)
1964
16.0 mm (0.6 in)
1965
27.2 mm (1.1 in)
1966
17.8 mm (0.7 in)
1967
27.9 mm (1.1 in)
1968
26.7 mm (1.1 in)
1969
21.3 mm (0.8 in)
1970
22.4 mm (0.9 in)
1971
20.6 mm (0.8 in)
1972
16.5 mm (0.6 in)
1973
26.7 mm (1.1 in)
1974
18.8 mm (0.7 in)
1975
31.0 mm (1.2 in)
1976
23.9 mm (0.9 in)
1977
16.3 mm (0.6 in)
1978
16.0 mm (0.6 in)
1979
20.3 mm (0.8 in)
1980
17.5 mm (0.7 in)
1981
26.2 mm (1.0 in)
1982
17.0 mm (0.7 in)
1983
41.9 mm (1.6 in)
1984
50.8 mm (2.0 in)
1985
15.2 mm (0.6 in)
1986
23.1 mm (0.9 in)
1987
13.7 mm (0.5 in)
1988
23.6 mm (0.9 in)
1989
21.1 mm (0.8 in)
1990
26.4 mm (1.0 in)
1991
24.4 mm (1.0 in)
1992
32.3 mm (1.3 in)
1993
20.6 mm (0.8 in)
1994
22.1 mm (0.9 in)
1995
22.4 mm (0.9 in)
1996
29.0 mm (1.1 in)
1997
24.9 mm (1.0 in)
1998
18.5 mm (0.7 in)
1999
13.5 mm (0.5 in)
2000
17.0 mm (0.7 in)
2001
25.7 mm (1.0 in)
2002
25.9 mm (1.0 in)
2003
14.7 mm (0.6 in)
2004
19.1 mm (0.8 in)
2005
35.6 mm (1.4 in)
2006
30.5 mm (1.2 in)
2007
36.1 mm (1.4 in)
2008
13.5 mm (0.5 in)
2009
17.3 mm (0.7 in)
2010
33.0 mm (1.3 in)
2011
21.6 mm (0.9 in)
2012
15.5 mm (0.6 in)
2013
20.3 mm (0.8 in)
2014
20.6 mm (0.8 in)
2015
25.4 mm (1.0 in)
2016
24.1 mm (0.9 in)
2017
27.7 mm (1.1 in)
2018
18.3 mm (0.7 in)
2019
19.1 mm (0.8 in)
2020
38.1 mm (1.5 in)
2021
0.0 mm (0.00 in)
Wettest five days (Rx5day)
The wettest five days of the year at Waterville, 1893 to 2021. The record is 90.9 mm (3.6 in) in 1936, marked on the chart; the median year is 36.6 mm (1.4 in).
Wettest five days (Rx5day) at Waterville by year
Year
Wettest five days (Rx5day)
1893
59.7 mm (2.4 in)
1894
57.2 mm (2.3 in)
1895
30.5 mm (1.2 in)
1896
38.1 mm (1.5 in)
1897
39.4 mm (1.6 in)
1898
23.1 mm (0.9 in)
1899
45.0 mm (1.8 in)
1900
51.3 mm (2.0 in)
1901
40.2 mm (1.6 in)
1902
43.2 mm (1.7 in)
1903
43.1 mm (1.7 in)
1904
45.7 mm (1.8 in)
1905
44.7 mm (1.8 in)
1906
41.8 mm (1.6 in)
1907
48.2 mm (1.9 in)
1908
79.2 mm (3.1 in)
1909
45.7 mm (1.8 in)
1910
23.1 mm (0.9 in)
1911
29.5 mm (1.2 in)
1912
31.3 mm (1.2 in)
1913
30.5 mm (1.2 in)
1914
27.9 mm (1.1 in)
1915
34.3 mm (1.4 in)
1916
45.0 mm (1.8 in)
1917
44.4 mm (1.7 in)
1918
31.4 mm (1.2 in)
1919
25.4 mm (1.0 in)
1920
57.2 mm (2.3 in)
1921
23.8 mm (0.9 in)
1922
21.1 mm (0.8 in)
1923
29.6 mm (1.2 in)
1924
27.8 mm (1.1 in)
1925
18.5 mm (0.7 in)
1926
26.2 mm (1.0 in)
1927
27.4 mm (1.1 in)
1928
32.5 mm (1.3 in)
1929
19.1 mm (0.8 in)
1930
25.2 mm (1.0 in)
1931
26.9 mm (1.1 in)
1932
25.4 mm (1.0 in)
1933
36.1 mm (1.4 in)
1934
33.3 mm (1.3 in)
1935
22.9 mm (0.9 in)
1936
90.9 mm (3.6 in)
1937
43.0 mm (1.7 in)
1938
47.0 mm (1.9 in)
1939
29.9 mm (1.2 in)
1940
40.4 mm (1.6 in)
1941
42.3 mm (1.7 in)
1942
27.4 mm (1.1 in)
1943
30.9 mm (1.2 in)
1944
45.0 mm (1.8 in)
1945
33.5 mm (1.3 in)
1946
40.2 mm (1.6 in)
1947
36.6 mm (1.4 in)
1948
88.5 mm (3.5 in)
1949
33.8 mm (1.3 in)
1950
32.8 mm (1.3 in)
1951
39.4 mm (1.6 in)
1952
45.2 mm (1.8 in)
1953
35.2 mm (1.4 in)
1954
48.4 mm (1.9 in)
1955
36.0 mm (1.4 in)
1956
43.0 mm (1.7 in)
1957
26.6 mm (1.0 in)
1958
51.3 mm (2.0 in)
1959
45.0 mm (1.8 in)
1960
24.9 mm (1.0 in)
1961
33.0 mm (1.3 in)
1962
51.3 mm (2.0 in)
1963
25.5 mm (1.0 in)
1964
39.9 mm (1.6 in)
1965
46.1 mm (1.8 in)
1966
28.2 mm (1.1 in)
1967
37.6 mm (1.5 in)
1968
50.4 mm (2.0 in)
1969
36.5 mm (1.4 in)
1970
44.0 mm (1.7 in)
1971
43.6 mm (1.7 in)
1972
32.6 mm (1.3 in)
1973
45.8 mm (1.8 in)
1974
41.4 mm (1.6 in)
1975
40.9 mm (1.6 in)
1976
51.1 mm (2.0 in)
1977
37.8 mm (1.5 in)
1978
27.9 mm (1.1 in)
1979
20.3 mm (0.8 in)
1980
34.7 mm (1.4 in)
1981
50.8 mm (2.0 in)
1982
31.0 mm (1.2 in)
1983
51.3 mm (2.0 in)
1984
57.7 mm (2.3 in)
1985
22.9 mm (0.9 in)
1986
56.8 mm (2.2 in)
1987
19.4 mm (0.8 in)
1988
30.7 mm (1.2 in)
1989
40.4 mm (1.6 in)
1990
44.2 mm (1.7 in)
1991
52.9 mm (2.1 in)
1992
43.0 mm (1.7 in)
1993
46.6 mm (1.8 in)
1994
29.7 mm (1.2 in)
1995
47.0 mm (1.9 in)
1996
38.1 mm (1.5 in)
1997
28.5 mm (1.1 in)
1998
35.4 mm (1.4 in)
1999
24.9 mm (1.0 in)
2000
20.6 mm (0.8 in)
2001
36.7 mm (1.4 in)
2002
41.1 mm (1.6 in)
2003
27.6 mm (1.1 in)
2004
25.0 mm (1.0 in)
2005
66.6 mm (2.6 in)
2006
42.7 mm (1.7 in)
2007
42.4 mm (1.7 in)
2008
20.8 mm (0.8 in)
2009
23.0 mm (0.9 in)
2010
35.5 mm (1.4 in)
2011
39.9 mm (1.6 in)
2012
30.4 mm (1.2 in)
2013
28.7 mm (1.1 in)
2014
44.2 mm (1.7 in)
2015
48.8 mm (1.9 in)
2016
31.8 mm (1.3 in)
2017
36.6 mm (1.4 in)
2018
29.2 mm (1.1 in)
2019
35.0 mm (1.4 in)
2020
n/a
2021
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Waterville, 1893 to 2021. The record is 108 days in 1998, marked on the chart; the median year is 47 days.
Longest dry spell (CDD) at Waterville by year
Year
Longest dry spell (CDD)
1893
48 days
1894
56 days
1895
57 days
1896
33 days
1897
32 days
1898
46 days
1899
37 days
1900
46 days
1901
64 days
1902
49 days
1903
45 days
1904
71 days
1905
31 days
1906
44 days
1907
22 days
1908
55 days
1909
40 days
1910
71 days
1911
34 days
1912
39 days
1913
24 days
1914
20 days
1915
56 days
1916
44 days
1917
54 days
1918
44 days
1919
47 days
1920
45 days
1921
79 days
1922
76 days
1923
35 days
1924
68 days
1925
83 days
1926
47 days
1927
30 days
1928
18 days
1929
47 days
1930
49 days
1931
71 days
1932
102 days
1933
31 days
1934
43 days
1935
40 days
1936
43 days
1937
44 days
1938
60 days
1939
59 days
1940
48 days
1941
29 days
1942
59 days
1943
48 days
1944
50 days
1945
63 days
1946
47 days
1947
40 days
1948
25 days
1949
45 days
1950
91 days
1951
52 days
1952
71 days
1953
51 days
1954
47 days
1955
48 days
1956
35 days
1957
52 days
1958
42 days
1959
92 days
1960
39 days
1961
56 days
1962
49 days
1963
57 days
1964
30 days
1965
35 days
1966
57 days
1967
73 days
1968
67 days
1969
82 days
1970
78 days
1971
52 days
1972
33 days
1973
87 days
1974
103 days
1975
31 days
1976
67 days
1977
59 days
1978
46 days
1979
40 days
1980
38 days
1981
36 days
1982
35 days
1983
43 days
1984
47 days
1985
53 days
1986
77 days
1987
90 days
1988
68 days
1989
36 days
1990
24 days
1991
78 days
1992
30 days
1993
62 days
1994
41 days
1995
33 days
1996
35 days
1997
31 days
1998
108 days
1999
57 days
2000
79 days
2001
33 days
2002
47 days
2003
86 days
2004
35 days
2005
46 days
2006
92 days
2007
43 days
2008
38 days
2009
39 days
2010
36 days
2011
76 days
2012
36 days
2013
32 days
2014
32 days
2015
61 days
2016
51 days
2017
29 days
2018
15 days
2019
32 days
2020
2 days
2021
1 day
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
89 years with a frost
Across 89 years with a frost, the median last spring frost at Waterville falls on 14 May and the median first autumn frost on 1 October, which leaves a median of 134 days between them.
In 1970 to 2017 the median growing season was 141 days. That is 15 days more than in 1893 to 1934.
Fitted over all years, the growing season changes by +2.7 days per decade at this station.
Frost dates and growing season at Waterville
Measure
Median, all years
Earliest period (1893 to 1934)
Recent period (1970 to 2017)
Recent against earliest
Fitted trend
Last spring frost
14 May
22 May
12 May
10 days earlier
-1.3 days per decade
First autumn frost
1 October
28 September
3 October
5 days later
+1.4 days per decade
Growing days
134 days
126 days
141 days
15 days more
+2.7 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
104 years, 1893 to 2017
A day with at least 22.5 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 54.8 mm (2.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Waterville: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
22.5 mm (0.9 in)
5 years
30.1 mm (1.2 in)
10 years
35.6 mm (1.4 in)
25 years
42.9 mm (1.7 in)
50 years
48.7 mm (1.9 in)
100 years
54.8 mm (2.2 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 104 years of values from 1893 to 2017.
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: 70.9 mm (2.8 in) in 1948; 50.8 mm (2.0 in) in 1984; 47.2 mm (1.9 in) in 1936.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Waterville standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Waterville 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.