Record envelope, standing records and threshold days for Wapato (USC00458959), Washington, United States, with 99 years of record.
Key Facts for Wapato
Wapato (USC00458959) is a weather station in Washington, United States at 46.44 latitude and -120.42 longitude, 256 m (841 ft) above sea level.
The station reports from 1915 to 2013, 99 years of record.
1,464 records set at Wapato still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Wapato set a daily record high minimum temperature of 25.6 C (78.1 F) on 2 July 2013.
About the Station
Location: Washington, United States, 46.44 latitude, -120.42 longitude.
Elevation: 256 m (841 ft).
Period of record: 1915 to 2013, 99 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 Wapato. 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 Wapato, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.0 C (68.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-14.4 C (6.1 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-7.8 C (18.0 F)
n/a
n/a
May
38.9 C (102.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
40.0 C (104.0 F)
0.6 C (33.1 F)
n/a
n/a
Jul
43.3 C (109.9 F)
2.2 C (36.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Wapato still stand. 1918 holds the most, with 44.
Standing records at Wapato by the year they were set
Year set
Standing records
1915
1
1916
20
1917
25
1918
44
1919
31
1920
20
1921
16
1922
13
1923
1
1924
29
1925
23
1926
31
1927
12
1928
13
1929
24
1930
23
1931
10
1932
18
1933
26
1934
31
1935
20
1936
36
1937
17
1938
15
1939
15
1940
13
1941
11
1942
11
1943
13
1944
14
1945
15
1946
5
1947
15
1948
8
1949
19
1950
24
1951
10
1952
10
1953
13
1954
12
1955
30
1956
8
1957
21
1958
15
1959
8
1960
23
1961
18
1962
19
1963
8
1964
10
1965
11
1966
10
1967
13
1968
16
1969
13
1970
14
1971
21
1972
24
1973
14
1974
28
1975
13
1976
7
1977
27
1978
9
1979
10
1980
4
1981
14
1982
12
1983
18
1984
14
1985
26
1986
17
1987
10
1988
18
1989
10
1990
14
1991
7
1992
15
1993
17
1994
6
1995
10
1996
13
1997
3
1998
6
1999
14
2000
8
2001
4
2002
21
2003
18
2004
6
2005
4
2006
17
2007
6
2008
8
2009
6
2010
9
2011
7
2012
3
2013
2
All-Time Record Progression
6 new records
6 all-time records were set at Wapato between 31 January 1950 and 27 November 2009. Each dot is a new record.
When Wapato set new all-time records
Date
Kind
Detail
1950-01-31
Record low maximum temperature
Record low maximum temperature -16.7 C (1.9 F)
1951-06-06
Record daily precipitation
Record daily precipitation 34.5 mm (1.4 in)
1957-01-27
Record low maximum temperature
Record low maximum temperature -17.2 C (1.0 F)
1992-07-23
Record daily precipitation
Record daily precipitation 37.3 mm (1.5 in)
1996-12-29
Record snow depth
Record snow depth 50.8 cm (20.0 in)
2009-11-27
Record daily precipitation
Record daily precipitation 58.4 mm (2.3 in)
Wettest Day of Each Month
Nov: 58.4 mm (2.3 in)
The wettest day on record for each calendar month at Wapato. The most was 58.4 mm (2.3 in) on 27 November 2009.
Record daily precipitation for each month at Wapato
Month
Record daily precipitation (mm)
Date
Jan
31.8 mm (1.3 in)
1 January 1997
Feb
22.9 mm (0.9 in)
4 February 2010
Mar
20.8 mm (0.8 in)
15 March 1987
Apr
23.4 mm (0.9 in)
24 April 1974
May
38.4 mm (1.5 in)
15 May 2011
Jun
34.5 mm (1.4 in)
6 June 1951
Jul
37.3 mm (1.5 in)
23 July 1992
Aug
30.5 mm (1.2 in)
18 August 1975
Sep
18.0 mm (0.7 in)
16 September 1954
Oct
25.7 mm (1.0 in)
29 October 1982
Nov
58.4 mm (2.3 in)
27 November 2009
Dec
32.0 mm (1.3 in)
13 December 1977
Period of Record Coverage
1915 to 2013
Complete yearUnder 90 percent of days
99 years of record at Wapato, 1915 to 2013. 9 years have data for under 90 percent of days and are left out of rankings: 1915, 1922, 1923, 1948, 1955, 2008, 2009, 2012 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 80 complete years at Wapato, 1916 to 2011. Blue stripes are years cooler than the station's own mean of 11.4 C (52.6 F); red stripes are warmer. The coolest year was 1916, at 9.3 C (48.8 F), and the warmest was 1934, at 13.6 C (56.5 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Wapato as warming stripes, 1916 to 2011
Year
Annual mean temperature
Difference from the station mean
1916
9.3 C
-2.09 C
1917
11.0 C
-0.44 C
1919
10.2 C
-1.23 C
1920
10.6 C
-0.85 C
1921
10.7 C
-0.69 C
1924
11.5 C
+0.08 C
1925
12.9 C
+1.48 C
1926
11.8 C
+0.39 C
1927
11.0 C
-0.48 C
1929
10.0 C
-1.41 C
1930
10.9 C
-0.52 C
1931
11.6 C
+0.12 C
1933
11.6 C
+0.20 C
1934
13.6 C
+2.19 C
1935
11.0 C
-0.40 C
1936
11.7 C
+0.24 C
1937
11.0 C
-0.47 C
1938
12.3 C
+0.87 C
1940
12.4 C
+0.97 C
1941
12.5 C
+1.08 C
1942
11.5 C
+0.10 C
1943
11.4 C
-0.07 C
1944
12.0 C
+0.52 C
1945
12.0 C
+0.60 C
1946
11.6 C
+0.13 C
1947
12.3 C
+0.90 C
1949
11.3 C
-0.17 C
1950
10.6 C
-0.79 C
1951
11.4 C
-0.02 C
1952
11.5 C
+0.10 C
1953
12.1 C
+0.68 C
1954
10.7 C
-0.75 C
1956
11.0 C
-0.41 C
1957
11.1 C
-0.35 C
1958
13.1 C
+1.67 C
1959
11.3 C
-0.18 C
1960
11.2 C
-0.20 C
1961
12.4 C
+1.01 C
1962
11.6 C
+0.15 C
1963
11.6 C
+0.14 C
1964
10.8 C
-0.63 C
1965
12.1 C
+0.66 C
1966
12.2 C
+0.78 C
1967
12.7 C
+1.29 C
1968
11.8 C
+0.34 C
1969
10.9 C
-0.50 C
1970
11.4 C
-0.01 C
1971
11.6 C
+0.20 C
1972
11.4 C
0.00 C
1973
12.4 C
+1.00 C
1974
12.2 C
+0.78 C
1975
11.6 C
+0.19 C
1976
11.5 C
+0.08 C
1977
12.1 C
+0.67 C
1978
11.4 C
-0.01 C
1979
11.7 C
+0.22 C
1981
11.6 C
+0.12 C
1982
10.1 C
-1.34 C
1983
10.8 C
-0.60 C
1984
9.9 C
-1.51 C
1985
10.0 C
-1.48 C
1986
11.5 C
+0.10 C
1987
12.0 C
+0.55 C
1988
11.5 C
+0.11 C
1990
11.9 C
+0.49 C
1991
11.4 C
-0.08 C
1992
12.1 C
+0.66 C
1993
9.8 C
-1.60 C
1994
12.0 C
+0.58 C
1995
11.3 C
-0.17 C
1996
10.0 C
-1.48 C
1997
11.1 C
-0.36 C
2000
10.8 C
-0.68 C
2001
11.6 C
+0.20 C
2002
11.4 C
-0.02 C
2003
12.3 C
+0.88 C
2004
11.8 C
+0.33 C
2007
11.1 C
-0.38 C
2010
11.3 C
-0.16 C
2011
10.4 C
-1.03 C
The fitted trend in annual mean temperature here over 1916 to 2011 is -0.01 C (-0.08 to 0.06) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.02 F (-0.14 to 0.10) per decade. The slope is a straight line fitted to 80 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Wapato
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.01 C (-0.08 to 0.06) per decade
-0.02 F (-0.14 to 0.10) per decade
1916 to 2011
80
Not clearly different from zero
Mean daily maximum
0.00 C (-0.07 to 0.08) per decade
0.01 F (-0.12 to 0.14) per decade
1916 to 2011
80
Not clearly different from zero
Mean daily minimum
-0.02 C (-0.09 to 0.05) per decade
-0.04 F (-0.17 to 0.08) per decade
1916 to 2011
80
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
1915 to 2013
Yearly extremes at Wapato: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
1928
38.9 C (102.0 F)
99
Coldest night (TNn)
-30.0 C (-22.0 F)
1919
-16.7 C (1.9 F)
99
Wettest day (Rx1day)
58.4 mm (2.3 in)
2009
17.8 mm (0.7 in)
99
Wettest five days (Rx5day)
72.2 mm (2.8 in)
1997
27.7 mm (1.1 in)
99
Longest dry spell (CDD)
143 days
1932
55 days
99
Hottest day (TXx)
The hottest day of the year at Wapato, 1915 to 2013. The record is 43.3 C (109.9 F) in 1928, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Wapato by year
Year
Hottest day (TXx)
1915
23.9 C (75.0 F)
1916
36.1 C (97.0 F)
1917
37.2 C (99.0 F)
1918
38.3 C (100.9 F)
1919
36.7 C (98.1 F)
1920
36.1 C (97.0 F)
1921
33.9 C (93.0 F)
1922
37.8 C (100.0 F)
1923
36.1 C (97.0 F)
1924
40.6 C (105.1 F)
1925
39.4 C (102.9 F)
1926
41.1 C (106.0 F)
1927
38.3 C (100.9 F)
1928
43.3 C (109.9 F)
1929
38.9 C (102.0 F)
1930
40.0 C (104.0 F)
1931
41.1 C (106.0 F)
1932
37.2 C (99.0 F)
1933
39.4 C (102.9 F)
1934
38.9 C (102.0 F)
1935
39.4 C (102.9 F)
1936
40.0 C (104.0 F)
1937
39.4 C (102.9 F)
1938
41.7 C (107.1 F)
1939
42.8 C (109.0 F)
1940
38.3 C (100.9 F)
1941
42.8 C (109.0 F)
1942
40.0 C (104.0 F)
1943
37.8 C (100.0 F)
1944
39.4 C (102.9 F)
1945
38.3 C (100.9 F)
1946
39.4 C (102.9 F)
1947
36.1 C (97.0 F)
1948
39.4 C (102.9 F)
1949
38.9 C (102.0 F)
1950
37.2 C (99.0 F)
1951
37.8 C (100.0 F)
1952
39.4 C (102.9 F)
1953
36.7 C (98.1 F)
1954
35.0 C (95.0 F)
1955
38.9 C (102.0 F)
1956
38.3 C (100.9 F)
1957
35.0 C (95.0 F)
1958
39.4 C (102.9 F)
1959
39.4 C (102.9 F)
1960
39.4 C (102.9 F)
1961
40.6 C (105.1 F)
1962
38.3 C (100.9 F)
1963
36.1 C (97.0 F)
1964
38.3 C (100.9 F)
1965
40.0 C (104.0 F)
1966
36.1 C (97.0 F)
1967
38.9 C (102.0 F)
1968
40.6 C (105.1 F)
1969
37.2 C (99.0 F)
1970
38.9 C (102.0 F)
1971
40.6 C (105.1 F)
1972
40.6 C (105.1 F)
1973
40.0 C (104.0 F)
1974
40.0 C (104.0 F)
1975
41.7 C (107.1 F)
1976
38.3 C (100.9 F)
1977
40.6 C (105.1 F)
1978
41.1 C (106.0 F)
1979
41.1 C (106.0 F)
1980
40.6 C (105.1 F)
1981
40.0 C (104.0 F)
1982
38.9 C (102.0 F)
1983
38.9 C (102.0 F)
1984
38.3 C (100.9 F)
1985
40.0 C (104.0 F)
1986
39.4 C (102.9 F)
1987
39.4 C (102.9 F)
1988
39.4 C (102.9 F)
1989
37.8 C (100.0 F)
1990
41.1 C (106.0 F)
1991
38.9 C (102.0 F)
1992
40.0 C (104.0 F)
1993
37.2 C (99.0 F)
1994
40.6 C (105.1 F)
1995
37.8 C (100.0 F)
1996
38.9 C (102.0 F)
1997
39.4 C (102.9 F)
1998
41.1 C (106.0 F)
1999
38.9 C (102.0 F)
2000
38.3 C (100.9 F)
2001
40.0 C (104.0 F)
2002
41.7 C (107.1 F)
2003
40.6 C (105.1 F)
2004
38.3 C (100.9 F)
2005
38.9 C (102.0 F)
2006
43.3 C (109.9 F)
2007
40.6 C (105.1 F)
2008
39.4 C (102.9 F)
2009
35.0 C (95.0 F)
2010
37.8 C (100.0 F)
2011
36.7 C (98.1 F)
2012
38.9 C (102.0 F)
2013
37.2 C (99.0 F)
Coldest night (TNn)
The coldest night of the year at Wapato, 1915 to 2013. The record is -30.0 C (-22.0 F) in 1919, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Wapato by year
Year
Coldest night (TNn)
1915
-14.4 C (6.1 F)
1916
-24.4 C (-11.9 F)
1917
-14.4 C (6.1 F)
1918
-13.9 C (7.0 F)
1919
-30.0 C (-22.0 F)
1920
-12.8 C (9.0 F)
1921
-13.3 C (8.1 F)
1922
-21.1 C (-6.0 F)
1923
-1.1 C (30.0 F)
1924
-22.8 C (-9.0 F)
1925
-15.6 C (3.9 F)
1926
-17.8 C (0.0 F)
1927
-25.6 C (-14.1 F)
1928
-13.9 C (7.0 F)
1929
-25.0 C (-13.0 F)
1930
-30.0 C (-22.0 F)
1931
-18.9 C (-2.0 F)
1932
-22.8 C (-9.0 F)
1933
-21.7 C (-7.1 F)
1934
-5.0 C (23.0 F)
1935
-20.6 C (-5.1 F)
1936
-16.7 C (1.9 F)
1937
-23.3 C (-9.9 F)
1938
-12.2 C (10.0 F)
1939
-11.1 C (12.0 F)
1940
-13.3 C (8.1 F)
1941
-7.2 C (19.0 F)
1942
-17.8 C (0.0 F)
1943
-23.9 C (-11.0 F)
1944
-15.6 C (3.9 F)
1945
-11.1 C (12.0 F)
1946
-12.2 C (10.0 F)
1947
-18.9 C (-2.0 F)
1948
-15.0 C (5.0 F)
1949
-21.7 C (-7.1 F)
1950
-29.4 C (-20.9 F)
1951
-16.1 C (3.0 F)
1952
-16.1 C (3.0 F)
1953
-6.7 C (19.9 F)
1954
-25.0 C (-13.0 F)
1955
-20.6 C (-5.1 F)
1956
-26.7 C (-16.1 F)
1957
-28.3 C (-18.9 F)
1958
-11.7 C (10.9 F)
1959
-18.9 C (-2.0 F)
1960
-18.9 C (-2.0 F)
1961
-11.7 C (10.9 F)
1962
-16.7 C (1.9 F)
1963
-18.9 C (-2.0 F)
1964
-23.9 C (-11.0 F)
1965
-13.9 C (7.0 F)
1966
-10.0 C (14.0 F)
1967
-12.8 C (9.0 F)
1968
-22.2 C (-8.0 F)
1969
-21.7 C (-7.1 F)
1970
-16.7 C (1.9 F)
1971
-11.1 C (12.0 F)
1972
-21.7 C (-7.1 F)
1973
-16.7 C (1.9 F)
1974
-23.3 C (-9.9 F)
1975
-11.1 C (12.0 F)
1976
-11.7 C (10.9 F)
1977
-16.1 C (3.0 F)
1978
-21.7 C (-7.1 F)
1979
-23.3 C (-9.9 F)
1980
-22.2 C (-8.0 F)
1981
-15.0 C (5.0 F)
1982
-24.4 C (-11.9 F)
1983
-25.0 C (-13.0 F)
1984
-22.2 C (-8.0 F)
1985
-22.8 C (-9.0 F)
1986
-11.1 C (12.0 F)
1987
-15.0 C (5.0 F)
1988
-16.7 C (1.9 F)
1989
-22.2 C (-8.0 F)
1990
-27.8 C (-18.0 F)
1991
-18.3 C (-0.9 F)
1992
-13.3 C (8.1 F)
1993
-20.6 C (-5.1 F)
1994
-14.4 C (6.1 F)
1995
-13.9 C (7.0 F)
1996
-28.3 C (-18.9 F)
1997
-15.6 C (3.9 F)
1998
-18.3 C (-0.9 F)
1999
-7.2 C (19.0 F)
2000
-12.2 C (10.0 F)
2001
-10.0 C (14.0 F)
2002
-11.7 C (10.9 F)
2003
-14.4 C (6.1 F)
2004
-24.4 C (-11.9 F)
2005
-17.2 C (1.0 F)
2006
-14.4 C (6.1 F)
2007
-14.4 C (6.1 F)
2008
-21.1 C (-6.0 F)
2009
-18.9 C (-2.0 F)
2010
-21.7 C (-7.1 F)
2011
-15.6 C (3.9 F)
2012
-7.8 C (18.0 F)
2013
-10.6 C (12.9 F)
Wettest day (Rx1day)
The wettest day of the year at Wapato, 1915 to 2013. The record is 58.4 mm (2.3 in) in 2009, marked on the chart; the median year is 17.8 mm (0.7 in).
Wettest day (Rx1day) at Wapato by year
Year
Wettest day (Rx1day)
1915
10.7 mm (0.4 in)
1916
19.1 mm (0.8 in)
1917
22.1 mm (0.9 in)
1918
11.4 mm (0.4 in)
1919
15.7 mm (0.6 in)
1920
15.2 mm (0.6 in)
1921
17.8 mm (0.7 in)
1922
11.7 mm (0.5 in)
1923
26.7 mm (1.1 in)
1924
12.4 mm (0.5 in)
1925
13.2 mm (0.5 in)
1926
25.9 mm (1.0 in)
1927
22.1 mm (0.9 in)
1928
11.9 mm (0.5 in)
1929
15.2 mm (0.6 in)
1930
7.1 mm (0.28 in)
1931
16.8 mm (0.7 in)
1932
15.5 mm (0.6 in)
1933
10.9 mm (0.4 in)
1934
17.8 mm (0.7 in)
1935
14.7 mm (0.6 in)
1936
14.5 mm (0.6 in)
1937
20.6 mm (0.8 in)
1938
20.3 mm (0.8 in)
1939
13.5 mm (0.5 in)
1940
23.1 mm (0.9 in)
1941
18.8 mm (0.7 in)
1942
19.3 mm (0.8 in)
1943
13.7 mm (0.5 in)
1944
18.5 mm (0.7 in)
1945
16.5 mm (0.6 in)
1946
19.8 mm (0.8 in)
1947
28.2 mm (1.1 in)
1948
25.9 mm (1.0 in)
1949
11.2 mm (0.4 in)
1950
18.3 mm (0.7 in)
1951
34.5 mm (1.4 in)
1952
10.9 mm (0.4 in)
1953
14.0 mm (0.6 in)
1954
21.6 mm (0.9 in)
1955
26.9 mm (1.1 in)
1956
28.2 mm (1.1 in)
1957
15.0 mm (0.6 in)
1958
15.2 mm (0.6 in)
1959
20.1 mm (0.8 in)
1960
17.8 mm (0.7 in)
1961
13.2 mm (0.5 in)
1962
14.2 mm (0.6 in)
1963
21.1 mm (0.8 in)
1964
29.2 mm (1.1 in)
1965
22.4 mm (0.9 in)
1966
10.4 mm (0.4 in)
1967
15.5 mm (0.6 in)
1968
19.1 mm (0.8 in)
1969
15.7 mm (0.6 in)
1970
11.9 mm (0.5 in)
1971
18.8 mm (0.7 in)
1972
17.3 mm (0.7 in)
1973
17.5 mm (0.7 in)
1974
23.4 mm (0.9 in)
1975
30.5 mm (1.2 in)
1976
16.0 mm (0.6 in)
1977
32.0 mm (1.3 in)
1978
13.2 mm (0.5 in)
1979
15.2 mm (0.6 in)
1980
19.1 mm (0.8 in)
1981
15.5 mm (0.6 in)
1982
25.7 mm (1.0 in)
1983
19.8 mm (0.8 in)
1984
21.6 mm (0.9 in)
1985
16.5 mm (0.6 in)
1986
25.1 mm (1.0 in)
1987
20.8 mm (0.8 in)
1988
12.7 mm (0.5 in)
1989
13.7 mm (0.5 in)
1990
26.7 mm (1.1 in)
1991
22.9 mm (0.9 in)
1992
37.3 mm (1.5 in)
1993
9.9 mm (0.39 in)
1994
19.8 mm (0.8 in)
1995
21.6 mm (0.9 in)
1996
30.5 mm (1.2 in)
1997
31.8 mm (1.3 in)
1998
21.1 mm (0.8 in)
1999
13.7 mm (0.5 in)
2000
17.8 mm (0.7 in)
2001
13.0 mm (0.5 in)
2002
15.5 mm (0.6 in)
2003
12.2 mm (0.5 in)
2004
16.0 mm (0.6 in)
2005
20.1 mm (0.8 in)
2006
25.4 mm (1.0 in)
2007
18.8 mm (0.7 in)
2008
10.7 mm (0.4 in)
2009
58.4 mm (2.3 in)
2010
22.9 mm (0.9 in)
2011
38.4 mm (1.5 in)
2012
16.8 mm (0.7 in)
2013
7.1 mm (0.28 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wapato, 1915 to 2013. The record is 72.2 mm (2.8 in) in 1997, marked on the chart; the median year is 27.7 mm (1.1 in).
Wettest five days (Rx5day) at Wapato by year
Year
Wettest five days (Rx5day)
1915
19.8 mm (0.8 in)
1916
22.1 mm (0.9 in)
1917
26.4 mm (1.0 in)
1918
12.7 mm (0.5 in)
1919
15.3 mm (0.6 in)
1920
25.1 mm (1.0 in)
1921
28.7 mm (1.1 in)
1922
14.2 mm (0.6 in)
1923
36.9 mm (1.5 in)
1924
26.9 mm (1.1 in)
1925
22.2 mm (0.9 in)
1926
32.7 mm (1.3 in)
1927
28.7 mm (1.1 in)
1928
25.2 mm (1.0 in)
1929
20.8 mm (0.8 in)
1930
13.5 mm (0.5 in)
1931
22.8 mm (0.9 in)
1932
17.5 mm (0.7 in)
1933
19.3 mm (0.8 in)
1934
22.4 mm (0.9 in)
1935
11.1 mm (0.4 in)
1936
17.5 mm (0.7 in)
1937
34.9 mm (1.4 in)
1938
28.1 mm (1.1 in)
1939
21.9 mm (0.9 in)
1940
36.8 mm (1.4 in)
1941
22.1 mm (0.9 in)
1942
26.9 mm (1.1 in)
1943
30.7 mm (1.2 in)
1944
26.4 mm (1.0 in)
1945
29.3 mm (1.2 in)
1946
25.7 mm (1.0 in)
1947
35.6 mm (1.4 in)
1948
31.7 mm (1.2 in)
1949
25.6 mm (1.0 in)
1950
27.7 mm (1.1 in)
1951
65.5 mm (2.6 in)
1952
15.5 mm (0.6 in)
1953
22.6 mm (0.9 in)
1954
27.7 mm (1.1 in)
1955
46.2 mm (1.8 in)
1956
28.5 mm (1.1 in)
1957
27.9 mm (1.1 in)
1958
22.7 mm (0.9 in)
1959
21.4 mm (0.8 in)
1960
24.4 mm (1.0 in)
1961
24.1 mm (0.9 in)
1962
34.1 mm (1.3 in)
1963
36.8 mm (1.4 in)
1964
66.8 mm (2.6 in)
1965
30.1 mm (1.2 in)
1966
30.3 mm (1.2 in)
1967
15.5 mm (0.6 in)
1968
29.9 mm (1.2 in)
1969
22.1 mm (0.9 in)
1970
37.8 mm (1.5 in)
1971
39.9 mm (1.6 in)
1972
25.6 mm (1.0 in)
1973
48.5 mm (1.9 in)
1974
28.0 mm (1.1 in)
1975
30.5 mm (1.2 in)
1976
17.0 mm (0.7 in)
1977
45.7 mm (1.8 in)
1978
36.5 mm (1.4 in)
1979
22.3 mm (0.9 in)
1980
34.3 mm (1.4 in)
1981
29.5 mm (1.2 in)
1982
25.7 mm (1.0 in)
1983
34.0 mm (1.3 in)
1984
22.1 mm (0.9 in)
1985
22.7 mm (0.9 in)
1986
28.9 mm (1.1 in)
1987
39.1 mm (1.5 in)
1988
25.3 mm (1.0 in)
1989
16.8 mm (0.7 in)
1990
32.2 mm (1.3 in)
1991
39.4 mm (1.6 in)
1992
37.8 mm (1.5 in)
1993
22.8 mm (0.9 in)
1994
30.5 mm (1.2 in)
1995
38.1 mm (1.5 in)
1996
47.9 mm (1.9 in)
1997
72.2 mm (2.8 in)
1998
33.8 mm (1.3 in)
1999
17.9 mm (0.7 in)
2000
18.6 mm (0.7 in)
2001
35.1 mm (1.4 in)
2002
37.1 mm (1.5 in)
2003
23.7 mm (0.9 in)
2004
29.2 mm (1.1 in)
2005
21.6 mm (0.9 in)
2006
35.1 mm (1.4 in)
2007
28.0 mm (1.1 in)
2008
14.0 mm (0.6 in)
2009
59.2 mm (2.3 in)
2010
32.5 mm (1.3 in)
2011
41.5 mm (1.6 in)
2012
23.7 mm (0.9 in)
2013
10.9 mm (0.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wapato, 1915 to 2013. The record is 143 days in 1932, marked on the chart; the median year is 55 days.
Longest dry spell (CDD) at Wapato by year
Year
Longest dry spell (CDD)
1915
12 days
1916
62 days
1917
63 days
1918
56 days
1919
127 days
1920
41 days
1921
104 days
1922
61 days
1923
19 days
1924
73 days
1925
38 days
1926
114 days
1927
76 days
1928
55 days
1929
43 days
1930
75 days
1931
77 days
1932
143 days
1933
45 days
1934
60 days
1935
41 days
1936
63 days
1937
52 days
1938
68 days
1939
32 days
1940
48 days
1941
46 days
1942
82 days
1943
62 days
1944
44 days
1945
66 days
1946
53 days
1947
32 days
1948
48 days
1949
82 days
1950
67 days
1951
53 days
1952
65 days
1953
60 days
1954
35 days
1955
48 days
1956
53 days
1957
46 days
1958
58 days
1959
81 days
1960
45 days
1961
55 days
1962
50 days
1963
71 days
1964
49 days
1965
59 days
1966
76 days
1967
99 days
1968
47 days
1969
98 days
1970
82 days
1971
73 days
1972
75 days
1973
101 days
1974
74 days
1975
46 days
1976
108 days
1977
64 days
1978
57 days
1979
118 days
1980
79 days
1981
49 days
1982
40 days
1983
41 days
1984
48 days
1985
54 days
1986
49 days
1987
105 days
1988
99 days
1989
60 days
1990
53 days
1991
53 days
1992
34 days
1993
46 days
1994
50 days
1995
26 days
1996
33 days
1997
53 days
1998
37 days
1999
60 days
2000
92 days
2001
42 days
2002
80 days
2003
72 days
2004
38 days
2005
62 days
2006
92 days
2007
50 days
2008
29 days
2009
26 days
2010
40 days
2011
53 days
2012
48 days
2013
58 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
80 years with a frost
Across 80 years with a frost, the median last spring frost at Wapato falls on 25 April and the median first autumn frost on 15 October, which leaves a median of 173 days between them.
In 1974 to 2011 the median growing season was 173 days. That is 3 days fewer than in 1916 to 1952.
Fitted over all years, the growing season changes by -0.1 days per decade at this station.
Frost dates and growing season at Wapato
Measure
Median, all years
Earliest period (1916 to 1952)
Recent period (1974 to 2011)
Recent against earliest
Fitted trend
Last spring frost
25 April
21 April
2 May
11 days later
+1.0 days per decade
First autumn frost
15 October
15 October
17 October
2 days later
+0.9 days per decade
Growing days
173 days
176 days
173 days
3 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
77 years, 1916 to 2011
A day with at least 18.3 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 41.4 mm (1.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Wapato: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
18.3 mm (0.7 in)
5 years
24.1 mm (0.9 in)
10 years
28.1 mm (1.1 in)
25 years
33.3 mm (1.3 in)
50 years
37.3 mm (1.5 in)
100 years
41.4 mm (1.6 in)
Longer than the 77 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, 77 years of values from 1916 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: 38.4 mm (1.5 in) in 2011; 37.3 mm (1.5 in) in 1992; 34.5 mm (1.4 in) in 1951.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Wapato standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wapato 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.