Record envelope, standing records and threshold days for Umatilla (USC00358734), Oregon, United States, with 74 years of record.
Key Facts for Umatilla
Umatilla (USC00358734) is a weather station in Oregon, United States at 45.92 latitude and -119.35 longitude, 82 m (269 ft) above sea level.
The station reports from 1892 to 1965, 74 years of record.
1,464 records set at Umatilla still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Umatilla set a daily record low maximum temperature of 15.6 C (60.1 F) on 28 September 1965.
About the Station
Location: Oregon, United States, 45.92 latitude, -119.35 longitude.
Elevation: 82 m (269 ft).
Period of record: 1892 to 1965, 74 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Umatilla. 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 Umatilla, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-30.6 C (-23.1 F)
n/a
n/a
Feb
25.6 C (78.1 F)
-27.2 C (-17.0 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-12.2 C (10.0 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-6.7 C (19.9 F)
n/a
n/a
May
40.0 C (104.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
43.3 C (109.9 F)
0.0 C (32.0 F)
n/a
n/a
Jul
47.2 C (117.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
45.6 C (114.1 F)
5.6 C (42.1 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Dec
21.7 C (71.1 F)
-26.7 C (-16.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Umatilla still stand. 1906 holds the most, with 50.
Standing records at Umatilla by the year they were set
Year set
Standing records
1902
12
1903
18
1904
25
1905
33
1906
50
1907
23
1908
30
1909
39
1910
23
1911
24
1912
16
1913
28
1914
24
1915
25
1916
43
1917
27
1918
35
1919
43
1920
17
1921
26
1922
19
1923
12
1924
48
1925
23
1926
26
1927
23
1928
19
1929
20
1930
24
1931
32
1932
34
1933
35
1934
38
1935
27
1936
37
1937
27
1938
18
1939
13
1940
15
1941
11
1942
9
1943
16
1944
13
1945
22
1946
11
1947
13
1948
12
1949
23
1950
23
1951
13
1952
20
1953
19
1954
19
1955
29
1956
10
1957
17
1958
14
1959
15
1960
18
1961
20
1962
18
1963
11
1964
16
1965
21
All-Time Record Progression
2 new records
2 all-time records were set at Umatilla between 27 July 1939 and 2 October 1957. Each dot is a new record.
When Umatilla set new all-time records
Date
Kind
Detail
1939-07-27
Record high maximum temperature
Record high maximum temperature 47.2 C (117.0 F)
1957-10-02
Record daily precipitation
Record daily precipitation 79.5 mm (3.1 in)
Wettest Day of Each Month
Oct: 79.5 mm (3.1 in)
The wettest day on record for each calendar month at Umatilla. The most was 79.5 mm (3.1 in) on 2 October 1957.
Record daily precipitation for each month at Umatilla
Month
Record daily precipitation (mm)
Date
Jan
27.4 mm (1.1 in)
7 January 1948
Feb
18.3 mm (0.7 in)
1 February 1916
Mar
22.9 mm (0.9 in)
22 March 1910
Apr
16.5 mm (0.6 in)
26 April 1894
May
26.7 mm (1.1 in)
22 May 1914
Jun
30.5 mm (1.2 in)
28 June 1955
Jul
24.6 mm (1.0 in)
7 July 1948
Aug
21.3 mm (0.8 in)
31 August 1896
Sep
25.4 mm (1.0 in)
2 September 1946
Oct
79.5 mm (3.1 in)
2 October 1957
Nov
32.0 mm (1.3 in)
25 November 1906
Dec
23.4 mm (0.9 in)
23 December 1964
Period of Record Coverage
1902 to 1965
Complete yearUnder 90 percent of days
64 years of record at Umatilla, 1902 to 1965. 6 years have data for under 90 percent of days and are left out of rankings: 1902, 1906, 1909, 1929, 1930, 1965.
Cooler than the station meanWarmer than the station mean
One stripe for each of 52 complete years at Umatilla, 1903 to 1964. Blue stripes are years cooler than the station's own mean of 12.1 C (53.8 F); red stripes are warmer. The coolest year was 1916, at 9.8 C (49.6 F), and the warmest was 1925, at 13.9 C (56.9 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Umatilla as warming stripes, 1903 to 1964
Year
Annual mean temperature
Difference from the station mean
1903
12.3 C
+0.23 C
1904
13.2 C
+1.13 C
1905
12.8 C
+0.70 C
1910
12.7 C
+0.63 C
1911
12.2 C
+0.12 C
1912
12.1 C
-0.02 C
1913
12.0 C
-0.07 C
1914
13.1 C
+1.00 C
1915
13.7 C
+1.64 C
1916
9.8 C
-2.32 C
1917
13.0 C
+0.90 C
1918
13.5 C
+1.45 C
1919
11.9 C
-0.22 C
1920
12.3 C
+0.17 C
1921
12.4 C
+0.31 C
1922
11.3 C
-0.75 C
1923
12.7 C
+0.64 C
1924
12.5 C
+0.45 C
1925
13.9 C
+1.76 C
1926
13.5 C
+1.37 C
1927
12.1 C
+0.04 C
1931
12.6 C
+0.50 C
1932
12.0 C
-0.13 C
1933
12.7 C
+0.58 C
1935
11.6 C
-0.49 C
1936
11.8 C
-0.33 C
1937
11.6 C
-0.46 C
1938
12.7 C
+0.58 C
1939
13.0 C
+0.92 C
1941
12.6 C
+0.50 C
1942
11.6 C
-0.50 C
1943
10.7 C
-1.44 C
1944
11.6 C
-0.54 C
1945
11.9 C
-0.19 C
1946
11.5 C
-0.58 C
1948
10.6 C
-1.45 C
1949
11.0 C
-1.05 C
1950
10.7 C
-1.36 C
1951
11.6 C
-0.53 C
1952
11.8 C
-0.31 C
1953
13.0 C
+0.87 C
1954
11.2 C
-0.94 C
1955
10.8 C
-1.26 C
1956
11.7 C
-0.35 C
1957
11.2 C
-0.88 C
1958
13.2 C
+1.13 C
1959
11.7 C
-0.39 C
1960
11.7 C
-0.43 C
1961
12.7 C
+0.61 C
1962
11.9 C
-0.15 C
1963
11.9 C
-0.21 C
1964
11.3 C
-0.81 C
The annual mean temperature here has fallen by 0.2 C (0.1 to 0.3) per decade over 1903 to 1964. In Fahrenheit: 0.3 F (0.1 to 0.6) per decade. The slope is a straight line fitted to 52 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Umatilla
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.2 C (-0.3 to -0.1) per decade
-0.3 F (-0.6 to -0.1) per decade
1903 to 1964
52
Fall
Mean daily maximum
-0.18 C (-0.33 to -0.02) per decade
-0.32 F (-0.60 to -0.03) per decade
1903 to 1964
52
Fall
Mean daily minimum
-0.2 C (-0.3 to -0.1) per decade
-0.4 F (-0.6 to -0.2) per decade
1903 to 1964
52
Fall
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
1892 to 1965
Yearly extremes at Umatilla: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
47.2 C (117.0 F)
1939
41.4 C (106.5 F)
64
Coldest night (TNn)
-30.6 C (-23.1 F)
1909
-16.4 C (2.5 F)
64
Wettest day (Rx1day)
79.5 mm (3.1 in)
1957
16.8 mm (0.7 in)
74
Wettest five days (Rx5day)
95.5 mm (3.8 in)
1957
26.1 mm (1.0 in)
74
Longest dry spell (CDD)
120 days
1932
58 days
74
Hottest day (TXx)
The hottest day of the year at Umatilla, 1892 to 1965. The record is 47.2 C (117.0 F) in 1939, marked on the chart; the median year is 41.4 C (106.5 F).
Hottest day (TXx) at Umatilla by year
Year
Hottest day (TXx)
1892
n/a
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1901
n/a
1902
41.1 C (106.0 F)
1903
42.2 C (108.0 F)
1904
41.1 C (106.0 F)
1905
46.1 C (115.0 F)
1906
46.1 C (115.0 F)
1907
40.6 C (105.1 F)
1908
42.2 C (108.0 F)
1909
39.4 C (102.9 F)
1910
39.4 C (102.9 F)
1911
42.8 C (109.0 F)
1912
39.4 C (102.9 F)
1913
40.6 C (105.1 F)
1914
43.9 C (111.0 F)
1915
42.8 C (109.0 F)
1916
38.9 C (102.0 F)
1917
45.6 C (114.1 F)
1918
43.3 C (109.9 F)
1919
44.4 C (111.9 F)
1920
43.3 C (109.9 F)
1921
39.4 C (102.9 F)
1922
45.6 C (114.1 F)
1923
41.7 C (107.1 F)
1924
43.3 C (109.9 F)
1925
42.2 C (108.0 F)
1926
45.0 C (113.0 F)
1927
40.6 C (105.1 F)
1928
45.6 C (114.1 F)
1929
42.2 C (108.0 F)
1930
42.8 C (109.0 F)
1931
46.1 C (115.0 F)
1932
41.1 C (106.0 F)
1933
41.7 C (107.1 F)
1934
42.8 C (109.0 F)
1935
43.3 C (109.9 F)
1936
42.2 C (108.0 F)
1937
41.1 C (106.0 F)
1938
44.4 C (111.9 F)
1939
47.2 C (117.0 F)
1940
41.1 C (106.0 F)
1941
43.9 C (111.0 F)
1942
41.7 C (107.1 F)
1943
38.3 C (100.9 F)
1944
40.0 C (104.0 F)
1945
38.9 C (102.0 F)
1946
40.6 C (105.1 F)
1947
37.8 C (100.0 F)
1948
39.4 C (102.9 F)
1949
38.3 C (100.9 F)
1950
38.3 C (100.9 F)
1951
40.0 C (104.0 F)
1952
40.6 C (105.1 F)
1953
40.0 C (104.0 F)
1954
36.7 C (98.1 F)
1955
40.6 C (105.1 F)
1956
40.6 C (105.1 F)
1957
35.0 C (95.0 F)
1958
41.1 C (106.0 F)
1959
42.2 C (108.0 F)
1960
43.3 C (109.9 F)
1961
45.6 C (114.1 F)
1962
41.7 C (107.1 F)
1963
38.3 C (100.9 F)
1964
40.0 C (104.0 F)
1965
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Umatilla, 1892 to 1965. The record is -30.6 C (-23.1 F) in 1909, marked on the chart; the median year is -16.4 C (2.5 F).
Coldest night (TNn) at Umatilla by year
Year
Coldest night (TNn)
1892
n/a
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1901
n/a
1902
-3.9 C (25.0 F)
1903
-10.0 C (14.0 F)
1904
-9.4 C (15.1 F)
1905
-13.3 C (8.1 F)
1906
-11.7 C (10.9 F)
1907
-20.6 C (-5.1 F)
1908
-15.0 C (5.0 F)
1909
-30.6 C (-23.1 F)
1910
-13.9 C (7.0 F)
1911
-14.4 C (6.1 F)
1912
-22.8 C (-9.0 F)
1913
-16.7 C (1.9 F)
1914
-15.6 C (3.9 F)
1915
-11.7 C (10.9 F)
1916
-27.8 C (-18.0 F)
1917
-13.3 C (8.1 F)
1918
-13.9 C (7.0 F)
1919
-26.7 C (-16.1 F)
1920
-9.4 C (15.1 F)
1921
-12.2 C (10.0 F)
1922
-26.1 C (-15.0 F)
1923
-17.8 C (0.0 F)
1924
-22.8 C (-9.0 F)
1925
-6.1 C (21.0 F)
1926
-18.3 C (-0.9 F)
1927
-26.1 C (-15.0 F)
1928
-13.9 C (7.0 F)
1929
-6.1 C (21.0 F)
1930
-6.7 C (19.9 F)
1931
-13.3 C (8.1 F)
1932
-22.8 C (-9.0 F)
1933
-23.3 C (-9.9 F)
1934
-3.3 C (26.1 F)
1935
-17.8 C (0.0 F)
1936
-23.3 C (-9.9 F)
1937
-25.6 C (-14.1 F)
1938
-11.7 C (10.9 F)
1939
-12.8 C (9.0 F)
1940
-11.1 C (12.0 F)
1941
-7.8 C (18.0 F)
1942
-20.0 C (-4.0 F)
1943
-21.1 C (-6.0 F)
1944
-10.6 C (12.9 F)
1945
-16.1 C (3.0 F)
1946
-11.7 C (10.9 F)
1947
-21.1 C (-6.0 F)
1948
-17.8 C (0.0 F)
1949
-23.3 C (-9.9 F)
1950
-27.2 C (-17.0 F)
1951
-16.7 C (1.9 F)
1952
-16.7 C (1.9 F)
1953
-5.0 C (23.0 F)
1954
-20.6 C (-5.1 F)
1955
-21.1 C (-6.0 F)
1956
-21.1 C (-6.0 F)
1957
-30.0 C (-22.0 F)
1958
-10.0 C (14.0 F)
1959
-17.8 C (0.0 F)
1960
-12.8 C (9.0 F)
1961
-13.9 C (7.0 F)
1962
-20.0 C (-4.0 F)
1963
-19.4 C (-2.9 F)
1964
-21.7 C (-7.1 F)
1965
-9.4 C (15.1 F)
Wettest day (Rx1day)
The wettest day of the year at Umatilla, 1892 to 1965. The record is 79.5 mm (3.1 in) in 1957, marked on the chart; the median year is 16.8 mm (0.7 in).
Wettest day (Rx1day) at Umatilla by year
Year
Wettest day (Rx1day)
1892
17.0 mm (0.7 in)
1893
22.6 mm (0.9 in)
1894
22.6 mm (0.9 in)
1895
17.8 mm (0.7 in)
1896
21.8 mm (0.9 in)
1897
14.7 mm (0.6 in)
1898
8.4 mm (0.33 in)
1899
14.0 mm (0.6 in)
1900
14.0 mm (0.6 in)
1901
12.7 mm (0.5 in)
1902
15.2 mm (0.6 in)
1903
14.0 mm (0.6 in)
1904
11.4 mm (0.4 in)
1905
12.2 mm (0.5 in)
1906
32.0 mm (1.3 in)
1907
19.1 mm (0.8 in)
1908
12.4 mm (0.5 in)
1909
20.3 mm (0.8 in)
1910
22.9 mm (0.9 in)
1911
24.6 mm (1.0 in)
1912
20.3 mm (0.8 in)
1913
16.5 mm (0.6 in)
1914
26.7 mm (1.1 in)
1915
16.0 mm (0.6 in)
1916
19.3 mm (0.8 in)
1917
15.2 mm (0.6 in)
1918
21.3 mm (0.8 in)
1919
19.1 mm (0.8 in)
1920
19.3 mm (0.8 in)
1921
28.4 mm (1.1 in)
1922
10.9 mm (0.4 in)
1923
20.6 mm (0.8 in)
1924
10.7 mm (0.4 in)
1925
20.3 mm (0.8 in)
1926
17.8 mm (0.7 in)
1927
13.5 mm (0.5 in)
1928
12.7 mm (0.5 in)
1929
6.1 mm (0.24 in)
1930
14.5 mm (0.6 in)
1931
19.3 mm (0.8 in)
1932
13.2 mm (0.5 in)
1933
15.2 mm (0.6 in)
1934
7.9 mm (0.31 in)
1935
10.7 mm (0.4 in)
1936
14.7 mm (0.6 in)
1937
15.7 mm (0.6 in)
1938
12.7 mm (0.5 in)
1939
11.7 mm (0.5 in)
1940
10.9 mm (0.4 in)
1941
18.5 mm (0.7 in)
1942
20.1 mm (0.8 in)
1943
17.8 mm (0.7 in)
1944
18.3 mm (0.7 in)
1945
20.8 mm (0.8 in)
1946
25.4 mm (1.0 in)
1947
11.9 mm (0.5 in)
1948
27.4 mm (1.1 in)
1949
13.2 mm (0.5 in)
1950
25.7 mm (1.0 in)
1951
15.2 mm (0.6 in)
1952
13.2 mm (0.5 in)
1953
26.7 mm (1.1 in)
1954
13.7 mm (0.5 in)
1955
30.5 mm (1.2 in)
1956
17.3 mm (0.7 in)
1957
79.5 mm (3.1 in)
1958
16.5 mm (0.6 in)
1959
16.5 mm (0.6 in)
1960
13.2 mm (0.5 in)
1961
20.1 mm (0.8 in)
1962
18.8 mm (0.7 in)
1963
12.7 mm (0.5 in)
1964
23.4 mm (0.9 in)
1965
20.1 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Umatilla, 1892 to 1965. The record is 95.5 mm (3.8 in) in 1957, marked on the chart; the median year is 26.1 mm (1.0 in).
Wettest five days (Rx5day) at Umatilla by year
Year
Wettest five days (Rx5day)
1892
31.5 mm (1.2 in)
1893
34.4 mm (1.4 in)
1894
25.1 mm (1.0 in)
1895
17.3 mm (0.7 in)
1896
23.8 mm (0.9 in)
1897
17.8 mm (0.7 in)
1898
15.8 mm (0.6 in)
1899
41.9 mm (1.6 in)
1900
16.0 mm (0.6 in)
1901
18.0 mm (0.7 in)
1902
29.0 mm (1.1 in)
1903
24.5 mm (1.0 in)
1904
15.7 mm (0.6 in)
1905
17.8 mm (0.7 in)
1906
13.9 mm (0.5 in)
1907
31.4 mm (1.2 in)
1908
16.2 mm (0.6 in)
1909
32.7 mm (1.3 in)
1910
25.4 mm (1.0 in)
1911
31.0 mm (1.2 in)
1912
27.9 mm (1.1 in)
1913
17.8 mm (0.7 in)
1914
30.7 mm (1.2 in)
1915
23.4 mm (0.9 in)
1916
45.8 mm (1.8 in)
1917
22.8 mm (0.9 in)
1918
23.3 mm (0.9 in)
1919
28.0 mm (1.1 in)
1920
31.8 mm (1.3 in)
1921
47.2 mm (1.9 in)
1922
17.3 mm (0.7 in)
1923
30.0 mm (1.2 in)
1924
20.9 mm (0.8 in)
1925
23.4 mm (0.9 in)
1926
27.9 mm (1.1 in)
1927
28.8 mm (1.1 in)
1928
14.5 mm (0.6 in)
1929
6.6 mm (0.26 in)
1930
23.6 mm (0.9 in)
1931
28.2 mm (1.1 in)
1932
16.5 mm (0.6 in)
1933
26.2 mm (1.0 in)
1934
11.0 mm (0.4 in)
1935
21.6 mm (0.9 in)
1936
20.6 mm (0.8 in)
1937
28.4 mm (1.1 in)
1938
19.0 mm (0.7 in)
1939
16.5 mm (0.6 in)
1940
27.9 mm (1.1 in)
1941
25.2 mm (1.0 in)
1942
33.3 mm (1.3 in)
1943
27.0 mm (1.1 in)
1944
18.3 mm (0.7 in)
1945
33.5 mm (1.3 in)
1946
27.7 mm (1.1 in)
1947
19.1 mm (0.8 in)
1948
40.6 mm (1.6 in)
1949
20.1 mm (0.8 in)
1950
30.0 mm (1.2 in)
1951
46.4 mm (1.8 in)
1952
17.6 mm (0.7 in)
1953
34.7 mm (1.4 in)
1954
19.3 mm (0.8 in)
1955
30.8 mm (1.2 in)
1956
29.2 mm (1.1 in)
1957
95.5 mm (3.8 in)
1958
28.2 mm (1.1 in)
1959
26.6 mm (1.0 in)
1960
16.2 mm (0.6 in)
1961
32.9 mm (1.3 in)
1962
37.1 mm (1.5 in)
1963
25.9 mm (1.0 in)
1964
86.5 mm (3.4 in)
1965
26.7 mm (1.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Umatilla, 1892 to 1965. The record is 120 days in 1932, marked on the chart; the median year is 58 days.
Longest dry spell (CDD) at Umatilla by year
Year
Longest dry spell (CDD)
1892
18 days
1893
63 days
1894
81 days
1895
28 days
1896
42 days
1897
65 days
1898
69 days
1899
67 days
1900
57 days
1901
53 days
1902
88 days
1903
60 days
1904
55 days
1905
76 days
1906
42 days
1907
47 days
1908
29 days
1909
53 days
1910
75 days
1911
35 days
1912
45 days
1913
29 days
1914
83 days
1915
43 days
1916
54 days
1917
99 days
1918
45 days
1919
111 days
1920
71 days
1921
45 days
1922
62 days
1923
36 days
1924
77 days
1925
87 days
1926
70 days
1927
66 days
1928
52 days
1929
103 days
1930
67 days
1931
99 days
1932
120 days
1933
91 days
1934
56 days
1935
51 days
1936
90 days
1937
38 days
1938
60 days
1939
58 days
1940
76 days
1941
39 days
1942
46 days
1943
43 days
1944
71 days
1945
89 days
1946
64 days
1947
30 days
1948
81 days
1949
117 days
1950
99 days
1951
53 days
1952
64 days
1953
71 days
1954
40 days
1955
48 days
1956
38 days
1957
65 days
1958
75 days
1959
45 days
1960
46 days
1961
39 days
1962
40 days
1963
48 days
1964
42 days
1965
31 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
52 years with a frost
Across 52 years with a frost, the median last spring frost at Umatilla falls on 15 April and the median first autumn frost on 19 October, which leaves a median of 191 days between them.
Fitted over all years, the growing season changes by -0.2 days per decade at this station.
Frost dates and growing season at Umatilla
Measure
Median, all years
Earliest period
Recent period (1932 to 1964)
Recent against earliest
Fitted trend
Last spring frost
15 April
n/a
14 April
n/a
0.0 days per decade
First autumn frost
19 October
n/a
20 October
n/a
-0.1 days per decade
Growing days
191 days
n/a
191 days
n/a
-0.2 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
62 years, 1894 to 1964
A day with at least 16.3 mm (0.6 in) of rain is expected about once in 2 years. A day with at least 49.0 mm (1.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Umatilla: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
16.3 mm (0.6 in)
5 years
22.4 mm (0.9 in)
10 years
27.3 mm (1.1 in)
25 years
34.8 mm (1.4 in)
50 years
41.4 mm (1.6 in)
100 years
49.0 mm (1.9 in)
Longer than the 62 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, 62 years of values from 1894 to 1964.
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: 79.5 mm (3.1 in) in 1957; 30.5 mm (1.2 in) in 1955; 28.4 mm (1.1 in) in 1921.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Umatilla standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Umatilla 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.