Record envelope, standing records and threshold days for Wasco (USC00359068), Oregon, United States, with 109 years of record.
Key Facts for Wasco
Wasco (USC00359068) is a weather station in Oregon, United States at 45.60 latitude and -120.70 longitude, 386 m (1,267 ft) above sea level.
The station reports from 1907 to 2015, 109 years of record.
1,464 records set at Wasco still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Wasco set a daily record precipitation of 11.4 mm (0.4 in) on 27 February 2015.
About the Station
Location: Oregon, United States, 45.60 latitude, -120.70 longitude.
Elevation: 386 m (1,267 ft).
Period of record: 1907 to 2015, 109 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 Wasco. 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 Wasco, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.2 C (63.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-22.2 C (-8.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-10.0 C (14.0 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-7.8 C (18.0 F)
n/a
n/a
May
37.8 C (100.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
40.6 C (105.1 F)
0.0 C (32.0 F)
n/a
n/a
Jul
45.0 C (113.0 F)
0.6 C (33.1 F)
n/a
n/a
Aug
40.6 C (105.1 F)
2.8 C (37.0 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-11.7 C (10.9 F)
n/a
n/a
Nov
20.0 C (68.0 F)
-14.4 C (6.1 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-21.7 C (-7.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Wasco still stand. 1919 holds the most, with 47.
Standing records at Wasco by the year they were set
Year set
Standing records
1907
37
1908
1
1910
36
1911
21
1912
35
1913
20
1914
24
1915
10
1916
45
1917
38
1918
29
1919
47
1920
23
1921
28
1922
40
1923
20
1924
40
1925
29
1926
42
1927
41
1928
18
1929
36
1930
41
1931
39
1932
37
1933
37
1934
34
1935
38
1936
46
1937
36
1938
27
1939
33
1940
25
1941
28
1942
28
1943
24
1944
36
1945
28
1946
22
1947
31
1948
17
1949
40
1950
44
1951
14
1952
39
1953
31
1954
29
All-Time Record Progression
2 new records
2 all-time records were set at Wasco between 31 January 1950 and 28 December 2007. Each dot is a new record.
When Wasco set new all-time records
Date
Kind
Detail
1950-01-31
Record low minimum temperature
Record low minimum temperature -28.9 C (-20.0 F)
2007-12-28
Record daily snowfall
Record daily snowfall 61.0 cm (24.0 in)
Wettest Day of Each Month
Mar: 74.2 mm (2.9 in)
The wettest day on record for each calendar month at Wasco. The most was 74.2 mm (2.9 in) on 31 March 1931.
Record daily precipitation for each month at Wasco
Month
Record daily precipitation (mm)
Date
Jan
50.8 mm (2.0 in)
19 January 1930
Feb
33.3 mm (1.3 in)
10 February 1961
Mar
74.2 mm (2.9 in)
31 March 1931
Apr
40.4 mm (1.6 in)
21 April 1988
May
28.7 mm (1.1 in)
20 May 1925
Jun
29.5 mm (1.2 in)
10 June 1956
Jul
28.7 mm (1.1 in)
6 July 1923
Aug
34.5 mm (1.4 in)
21 August 1990
Sep
38.1 mm (1.5 in)
19 September 2010
Oct
33.3 mm (1.3 in)
24 October 1943
Nov
56.6 mm (2.2 in)
20 November 1921
Dec
54.6 mm (2.1 in)
30 December 1931
Period of Record Coverage
1907 to 1954
Complete yearUnder 90 percent of days
48 years of record at Wasco, 1907 to 1954. 8 years have data for under 90 percent of days and are left out of rankings: 1907, 1908, 1909, 1911, 1919, 1925, 1948, 1954.
Cooler than the station meanWarmer than the station mean
One stripe for each of 36 complete years at Wasco, 1910 to 1953. Blue stripes are years cooler than the station's own mean of 10.3 C (50.6 F); red stripes are warmer. The coolest year was 1916, at 8.8 C (47.8 F), and the warmest was 1934, at 11.9 C (53.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Wasco as warming stripes, 1910 to 1953
Year
Annual mean temperature
Difference from the station mean
1910
11.3 C
+0.96 C
1913
10.4 C
+0.09 C
1914
10.6 C
+0.33 C
1915
11.1 C
+0.74 C
1916
8.8 C
-1.53 C
1917
11.0 C
+0.70 C
1918
10.9 C
+0.63 C
1920
9.6 C
-0.72 C
1921
9.8 C
-0.50 C
1922
9.1 C
-1.25 C
1923
9.8 C
-0.54 C
1927
9.4 C
-0.88 C
1928
10.0 C
-0.35 C
1929
9.5 C
-0.82 C
1930
9.6 C
-0.74 C
1931
9.9 C
-0.41 C
1932
9.9 C
-0.46 C
1933
10.3 C
-0.02 C
1934
11.9 C
+1.63 C
1935
10.0 C
-0.30 C
1936
10.4 C
+0.13 C
1938
11.0 C
+0.69 C
1939
11.5 C
+1.15 C
1940
11.3 C
+0.95 C
1941
11.2 C
+0.90 C
1942
10.4 C
+0.04 C
1943
9.8 C
-0.55 C
1944
10.5 C
+0.15 C
1945
10.5 C
+0.18 C
1946
10.5 C
+0.16 C
1947
11.1 C
+0.81 C
1949
9.9 C
-0.38 C
1950
9.3 C
-1.00 C
1951
10.0 C
-0.31 C
1952
9.9 C
-0.39 C
1953
11.4 C
+1.04 C
The fitted trend in annual mean temperature here over 1910 to 1953 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.3 to 0.5) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Wasco
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.3) per decade
0.1 F (-0.3 to 0.5) per decade
1910 to 1953
36
Not clearly different from zero
Mean daily maximum
0.22 C (-0.02 to 0.45) per decade
0.39 F (-0.03 to 0.82) per decade
1910 to 1953
36
Not clearly different from zero
Mean daily minimum
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.6 to 0.2) per decade
1910 to 1953
36
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
1907 to 2015
Yearly extremes at Wasco: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
1939
38.9 C (102.0 F)
48
Coldest night (TNn)
-28.9 C (-20.0 F)
1950
-16.4 C (2.5 F)
48
Wettest day (Rx1day)
74.2 mm (2.9 in)
1931
23.4 mm (0.9 in)
109
Wettest five days (Rx5day)
103.1 mm (4.1 in)
1964
38.4 mm (1.5 in)
109
Longest dry spell (CDD)
121 days
1932
53 days
109
Hottest day (TXx)
The hottest day of the year at Wasco, 1907 to 2015. The record is 45.0 C (113.0 F) in 1939, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Wasco by year
Year
Hottest day (TXx)
1907
32.2 C (90.0 F)
1908
38.3 C (100.9 F)
1909
35.0 C (95.0 F)
1910
37.2 C (99.0 F)
1911
35.0 C (95.0 F)
1912
37.2 C (99.0 F)
1913
38.3 C (100.9 F)
1914
39.4 C (102.9 F)
1915
38.9 C (102.0 F)
1916
37.8 C (100.0 F)
1917
39.4 C (102.9 F)
1918
41.1 C (106.0 F)
1919
41.1 C (106.0 F)
1920
37.8 C (100.0 F)
1921
35.6 C (96.1 F)
1922
39.4 C (102.9 F)
1923
36.1 C (97.0 F)
1924
39.4 C (102.9 F)
1925
38.9 C (102.0 F)
1926
42.2 C (108.0 F)
1927
38.3 C (100.9 F)
1928
43.9 C (111.0 F)
1929
39.4 C (102.9 F)
1930
39.4 C (102.9 F)
1931
37.8 C (100.0 F)
1932
37.2 C (99.0 F)
1933
40.6 C (105.1 F)
1934
38.3 C (100.9 F)
1935
43.3 C (109.9 F)
1936
38.9 C (102.0 F)
1937
38.3 C (100.9 F)
1938
43.9 C (111.0 F)
1939
45.0 C (113.0 F)
1940
40.0 C (104.0 F)
1941
43.9 C (111.0 F)
1942
42.8 C (109.0 F)
1943
37.8 C (100.0 F)
1944
39.4 C (102.9 F)
1945
40.0 C (104.0 F)
1946
41.7 C (107.1 F)
1947
37.8 C (100.0 F)
1948
37.8 C (100.0 F)
1949
38.9 C (102.0 F)
1950
37.8 C (100.0 F)
1951
36.7 C (98.1 F)
1952
38.9 C (102.0 F)
1953
38.9 C (102.0 F)
1954
29.4 C (84.9 F)
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
n/a
2006
n/a
2007
n/a
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2012
n/a
2013
n/a
2014
n/a
2015
n/a
Coldest night (TNn)
The coldest night of the year at Wasco, 1907 to 2015. The record is -28.9 C (-20.0 F) in 1950, marked on the chart; the median year is -16.4 C (2.5 F).
Coldest night (TNn) at Wasco by year
Year
Coldest night (TNn)
1907
-1.1 C (30.0 F)
1908
-10.6 C (12.9 F)
1909
-7.8 C (18.0 F)
1910
-15.0 C (5.0 F)
1911
-13.3 C (8.1 F)
1912
-17.8 C (0.0 F)
1913
-12.2 C (10.0 F)
1914
-16.7 C (1.9 F)
1915
-13.3 C (8.1 F)
1916
-22.8 C (-9.0 F)
1917
-14.4 C (6.1 F)
1918
-13.9 C (7.0 F)
1919
-21.1 C (-6.0 F)
1920
-10.0 C (14.0 F)
1921
-17.8 C (0.0 F)
1922
-24.4 C (-11.9 F)
1923
-21.7 C (-7.1 F)
1924
-21.7 C (-7.1 F)
1925
-6.1 C (21.0 F)
1926
-11.7 C (10.9 F)
1927
-26.7 C (-16.1 F)
1928
-15.6 C (3.9 F)
1929
-22.2 C (-8.0 F)
1930
-26.7 C (-16.1 F)
1931
-16.1 C (3.0 F)
1932
-21.1 C (-6.0 F)
1933
-19.4 C (-2.9 F)
1934
-3.9 C (25.0 F)
1935
-23.3 C (-9.9 F)
1936
-20.6 C (-5.1 F)
1937
-24.4 C (-11.9 F)
1938
-10.0 C (14.0 F)
1939
-16.1 C (3.0 F)
1940
-11.1 C (12.0 F)
1941
-12.2 C (10.0 F)
1942
-20.0 C (-4.0 F)
1943
-23.3 C (-9.9 F)
1944
-10.6 C (12.9 F)
1945
-10.6 C (12.9 F)
1946
-11.1 C (12.0 F)
1947
-19.4 C (-2.9 F)
1948
-14.4 C (6.1 F)
1949
-21.1 C (-6.0 F)
1950
-28.9 C (-20.0 F)
1951
-16.7 C (1.9 F)
1952
-17.2 C (1.0 F)
1953
-6.7 C (19.9 F)
1954
-21.7 C (-7.1 F)
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
n/a
2006
n/a
2007
n/a
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2012
n/a
2013
n/a
2014
n/a
2015
n/a
Wettest day (Rx1day)
The wettest day of the year at Wasco, 1907 to 2015. The record is 74.2 mm (2.9 in) in 1931, marked on the chart; the median year is 23.4 mm (0.9 in).
Wettest day (Rx1day) at Wasco by year
Year
Wettest day (Rx1day)
1907
15.2 mm (0.6 in)
1908
28.4 mm (1.1 in)
1909
27.4 mm (1.1 in)
1910
15.2 mm (0.6 in)
1911
31.5 mm (1.2 in)
1912
34.3 mm (1.4 in)
1913
18.8 mm (0.7 in)
1914
29.5 mm (1.2 in)
1915
24.1 mm (0.9 in)
1916
23.4 mm (0.9 in)
1917
31.8 mm (1.3 in)
1918
23.4 mm (0.9 in)
1919
21.6 mm (0.9 in)
1920
15.7 mm (0.6 in)
1921
56.6 mm (2.2 in)
1922
16.3 mm (0.6 in)
1923
28.7 mm (1.1 in)
1924
23.1 mm (0.9 in)
1925
28.7 mm (1.1 in)
1926
31.0 mm (1.2 in)
1927
22.9 mm (0.9 in)
1928
31.0 mm (1.2 in)
1929
43.9 mm (1.7 in)
1930
50.8 mm (2.0 in)
1931
74.2 mm (2.9 in)
1932
30.5 mm (1.2 in)
1933
26.9 mm (1.1 in)
1934
14.0 mm (0.6 in)
1935
18.8 mm (0.7 in)
1936
22.9 mm (0.9 in)
1937
18.0 mm (0.7 in)
1938
17.3 mm (0.7 in)
1939
8.4 mm (0.33 in)
1940
22.1 mm (0.9 in)
1941
25.9 mm (1.0 in)
1942
22.9 mm (0.9 in)
1943
33.3 mm (1.3 in)
1944
20.3 mm (0.8 in)
1945
24.9 mm (1.0 in)
1946
13.5 mm (0.5 in)
1947
35.1 mm (1.4 in)
1948
16.5 mm (0.6 in)
1949
16.0 mm (0.6 in)
1950
24.9 mm (1.0 in)
1951
19.1 mm (0.8 in)
1952
23.1 mm (0.9 in)
1953
43.2 mm (1.7 in)
1954
14.0 mm (0.6 in)
1955
23.6 mm (0.9 in)
1956
32.3 mm (1.3 in)
1957
15.0 mm (0.6 in)
1958
20.6 mm (0.8 in)
1959
26.7 mm (1.1 in)
1960
21.8 mm (0.9 in)
1961
33.3 mm (1.3 in)
1962
14.7 mm (0.6 in)
1963
20.6 mm (0.8 in)
1964
40.6 mm (1.6 in)
1965
16.8 mm (0.7 in)
1966
25.4 mm (1.0 in)
1967
14.7 mm (0.6 in)
1968
16.3 mm (0.6 in)
1969
25.1 mm (1.0 in)
1970
20.8 mm (0.8 in)
1971
18.8 mm (0.7 in)
1972
43.7 mm (1.7 in)
1973
17.5 mm (0.7 in)
1974
21.6 mm (0.9 in)
1975
29.2 mm (1.1 in)
1976
12.7 mm (0.5 in)
1977
29.2 mm (1.1 in)
1978
21.8 mm (0.9 in)
1979
17.5 mm (0.7 in)
1980
27.9 mm (1.1 in)
1981
35.1 mm (1.4 in)
1982
30.7 mm (1.2 in)
1983
18.8 mm (0.7 in)
1984
21.8 mm (0.9 in)
1985
19.8 mm (0.8 in)
1986
23.9 mm (0.9 in)
1987
24.9 mm (1.0 in)
1988
40.4 mm (1.6 in)
1989
22.9 mm (0.9 in)
1990
34.5 mm (1.4 in)
1991
23.6 mm (0.9 in)
1992
19.1 mm (0.8 in)
1993
25.4 mm (1.0 in)
1994
34.8 mm (1.4 in)
1995
30.2 mm (1.2 in)
1996
30.5 mm (1.2 in)
1997
21.8 mm (0.9 in)
1998
25.9 mm (1.0 in)
1999
13.2 mm (0.5 in)
2000
29.2 mm (1.1 in)
2001
20.3 mm (0.8 in)
2002
15.0 mm (0.6 in)
2003
33.0 mm (1.3 in)
2004
20.3 mm (0.8 in)
2005
29.2 mm (1.1 in)
2006
24.4 mm (1.0 in)
2007
21.6 mm (0.9 in)
2008
10.4 mm (0.4 in)
2009
17.3 mm (0.7 in)
2010
38.1 mm (1.5 in)
2011
31.8 mm (1.3 in)
2012
20.8 mm (0.8 in)
2013
25.4 mm (1.0 in)
2014
14.7 mm (0.6 in)
2015
17.8 mm (0.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wasco, 1907 to 2015. The record is 103.1 mm (4.1 in) in 1964, marked on the chart; the median year is 38.4 mm (1.5 in).
Wettest five days (Rx5day) at Wasco by year
Year
Wettest five days (Rx5day)
1907
46.0 mm (1.8 in)
1908
31.3 mm (1.2 in)
1909
61.1 mm (2.4 in)
1910
31.7 mm (1.2 in)
1911
54.6 mm (2.1 in)
1912
65.0 mm (2.6 in)
1913
30.2 mm (1.2 in)
1914
39.4 mm (1.6 in)
1915
48.0 mm (1.9 in)
1916
36.1 mm (1.4 in)
1917
47.0 mm (1.9 in)
1918
34.6 mm (1.4 in)
1919
42.5 mm (1.7 in)
1920
38.1 mm (1.5 in)
1921
97.8 mm (3.9 in)
1922
30.1 mm (1.2 in)
1923
41.6 mm (1.6 in)
1924
40.2 mm (1.6 in)
1925
26.3 mm (1.0 in)
1926
60.0 mm (2.4 in)
1927
49.9 mm (2.0 in)
1928
49.3 mm (1.9 in)
1929
55.8 mm (2.2 in)
1930
63.5 mm (2.5 in)
1931
87.0 mm (3.4 in)
1932
54.6 mm (2.1 in)
1933
37.5 mm (1.5 in)
1934
31.5 mm (1.2 in)
1935
32.6 mm (1.3 in)
1936
62.1 mm (2.4 in)
1937
33.7 mm (1.3 in)
1938
32.5 mm (1.3 in)
1939
18.0 mm (0.7 in)
1940
42.7 mm (1.7 in)
1941
43.8 mm (1.7 in)
1942
38.9 mm (1.5 in)
1943
56.9 mm (2.2 in)
1944
28.7 mm (1.1 in)
1945
55.2 mm (2.2 in)
1946
35.1 mm (1.4 in)
1947
39.4 mm (1.6 in)
1948
30.2 mm (1.2 in)
1949
27.3 mm (1.1 in)
1950
44.0 mm (1.7 in)
1951
31.8 mm (1.3 in)
1952
29.1 mm (1.1 in)
1953
60.9 mm (2.4 in)
1954
24.7 mm (1.0 in)
1955
32.3 mm (1.3 in)
1956
50.8 mm (2.0 in)
1957
30.2 mm (1.2 in)
1958
44.7 mm (1.8 in)
1959
39.2 mm (1.5 in)
1960
53.8 mm (2.1 in)
1961
69.3 mm (2.7 in)
1962
36.2 mm (1.4 in)
1963
38.4 mm (1.5 in)
1964
103.1 mm (4.1 in)
1965
26.0 mm (1.0 in)
1966
55.1 mm (2.2 in)
1967
23.6 mm (0.9 in)
1968
35.0 mm (1.4 in)
1969
36.8 mm (1.4 in)
1970
46.5 mm (1.8 in)
1971
46.5 mm (1.8 in)
1972
49.5 mm (1.9 in)
1973
36.8 mm (1.4 in)
1974
23.3 mm (0.9 in)
1975
47.5 mm (1.9 in)
1976
17.3 mm (0.7 in)
1977
70.4 mm (2.8 in)
1978
33.7 mm (1.3 in)
1979
39.1 mm (1.5 in)
1980
49.2 mm (1.9 in)
1981
44.7 mm (1.8 in)
1982
34.2 mm (1.3 in)
1983
31.0 mm (1.2 in)
1984
33.4 mm (1.3 in)
1985
31.3 mm (1.2 in)
1986
29.0 mm (1.1 in)
1987
45.2 mm (1.8 in)
1988
47.3 mm (1.9 in)
1989
29.2 mm (1.1 in)
1990
41.6 mm (1.6 in)
1991
32.4 mm (1.3 in)
1992
32.3 mm (1.3 in)
1993
17.5 mm (0.7 in)
1994
68.3 mm (2.7 in)
1995
59.7 mm (2.4 in)
1996
45.0 mm (1.8 in)
1997
31.8 mm (1.3 in)
1998
41.4 mm (1.6 in)
1999
31.0 mm (1.2 in)
2000
29.2 mm (1.1 in)
2001
30.4 mm (1.2 in)
2002
34.9 mm (1.4 in)
2003
33.8 mm (1.3 in)
2004
42.9 mm (1.7 in)
2005
82.7 mm (3.3 in)
2006
79.9 mm (3.1 in)
2007
39.9 mm (1.6 in)
2008
14.0 mm (0.6 in)
2009
27.4 mm (1.1 in)
2010
48.3 mm (1.9 in)
2011
23.7 mm (0.9 in)
2012
20.3 mm (0.8 in)
2013
17.8 mm (0.7 in)
2014
35.8 mm (1.4 in)
2015
19.6 mm (0.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wasco, 1907 to 2015. The record is 121 days in 1932, marked on the chart; the median year is 53 days.
Longest dry spell (CDD) at Wasco by year
Year
Longest dry spell (CDD)
1907
42 days
1908
38 days
1909
37 days
1910
63 days
1911
34 days
1912
44 days
1913
38 days
1914
56 days
1915
39 days
1916
28 days
1917
69 days
1918
34 days
1919
50 days
1920
41 days
1921
49 days
1922
62 days
1923
32 days
1924
82 days
1925
90 days
1926
58 days
1927
58 days
1928
93 days
1929
98 days
1930
35 days
1931
70 days
1932
121 days
1933
58 days
1934
55 days
1935
39 days
1936
77 days
1937
32 days
1938
56 days
1939
57 days
1940
48 days
1941
28 days
1942
45 days
1943
64 days
1944
73 days
1945
89 days
1946
52 days
1947
40 days
1948
28 days
1949
81 days
1950
95 days
1951
61 days
1952
68 days
1953
53 days
1954
23 days
1955
43 days
1956
44 days
1957
56 days
1958
67 days
1959
74 days
1960
49 days
1961
51 days
1962
69 days
1963
33 days
1964
39 days
1965
32 days
1966
58 days
1967
80 days
1968
39 days
1969
86 days
1970
68 days
1971
51 days
1972
35 days
1973
80 days
1974
102 days
1975
39 days
1976
49 days
1977
45 days
1978
53 days
1979
82 days
1980
57 days
1981
74 days
1982
56 days
1983
32 days
1984
35 days
1985
52 days
1986
42 days
1987
79 days
1988
66 days
1989
50 days
1990
45 days
1991
55 days
1992
62 days
1993
87 days
1994
120 days
1995
31 days
1996
46 days
1997
46 days
1998
32 days
1999
56 days
2000
10 days
2001
33 days
2002
67 days
2003
66 days
2004
38 days
2005
69 days
2006
89 days
2007
75 days
2008
63 days
2009
60 days
2010
80 days
2011
2 days
2012
12 days
2013
25 days
2014
21 days
2015
16 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
36 years with a frost
Across 36 years with a frost, the median last spring frost at Wasco falls on 4 May and the median first autumn frost on 16 October, which leaves a median of 165 days between them.
Fitted over all years, the growing season changes by -4.8 days per decade at this station.
Frost dates and growing season at Wasco
Measure
Median, all years
Earliest period
Recent period (1918 to 1953)
Recent against earliest
Fitted trend
Last spring frost
4 May
n/a
5 May
n/a
+1.4 days per decade
First autumn frost
16 October
n/a
14 October
n/a
-3.4 days per decade
Growing days
165 days
n/a
164 days
n/a
-4.8 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
91 years, 1908 to 2010
A day with at least 23.8 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 53.0 mm (2.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Wasco: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
23.8 mm (0.9 in)
5 years
31.5 mm (1.2 in)
10 years
36.6 mm (1.4 in)
25 years
43.2 mm (1.7 in)
50 years
48.1 mm (1.9 in)
100 years
53.0 mm (2.1 in)
Longer than the 91 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, 91 years of values from 1908 to 2010.
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: 56.6 mm (2.2 in) in 1921; 50.8 mm (2.0 in) in 1930; 43.9 mm (1.7 in) in 1929.
Download the Data
Data for Wasco standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wasco 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.