Record envelope, standing records and threshold days for Pomeroy (USC00456610), Washington, United States, with 130 years of record.
Key Facts for Pomeroy
Pomeroy (USC00456610) is a weather station in Washington, United States at 46.47 latitude and -117.59 longitude, 590 m (1,934 ft) above sea level.
The station reports from 1891 to 2020, 130 years of record.
1,464 records set at Pomeroy still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Pomeroy set a daily record low maximum temperature of 7.2 C (45.0 F) on 12 April 2020.
About the Station
Location: Washington, United States, 46.47 latitude, -117.59 longitude.
Elevation: 590 m (1,934 ft).
Period of record: 1891 to 2020, 130 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 Pomeroy. 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 Pomeroy, 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)
-30.0 C (-22.0 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-27.2 C (-17.0 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-14.4 C (6.1 F)
n/a
n/a
Apr
36.7 C (98.1 F)
-11.7 C (10.9 F)
n/a
n/a
May
38.3 C (100.9 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
40.0 C (104.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
44.4 C (111.9 F)
1.7 C (35.1 F)
n/a
n/a
Aug
42.8 C (109.0 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
38.9 C (102.0 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-15.0 C (5.0 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-25.0 C (-13.0 F)
n/a
n/a
Dec
22.2 C (72.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Pomeroy still stand. 1899 holds the most, with 65.
Standing records at Pomeroy by the year they were set
Year set
Standing records
1891
7
1892
17
1893
12
1894
20
1895
14
1896
39
1897
27
1898
36
1899
65
1900
15
1901
8
1902
15
1903
18
1904
1
1928
7
1929
8
1930
21
1931
10
1932
15
1933
20
1934
23
1935
22
1936
47
1937
12
1938
8
1939
26
1940
10
1941
11
1942
11
1943
17
1944
19
1945
14
1946
16
1947
8
1948
13
1949
22
1950
26
1951
8
1952
9
1953
12
1954
13
1955
22
1956
10
1957
8
1958
11
1959
9
1960
17
1961
10
1962
13
1963
11
1964
13
1965
4
1966
8
1967
8
1968
22
1969
4
1970
6
1971
10
1972
19
1973
12
1974
8
1975
13
1976
6
1977
18
1978
10
1979
12
1980
11
1981
12
1982
3
1983
10
1984
8
1985
32
1986
23
1987
18
1988
16
1989
17
1990
23
1991
10
1992
17
1993
18
1994
7
1995
9
1996
11
1997
2
1998
5
1999
13
2000
8
2001
5
2002
14
2003
11
2004
6
2005
9
2006
9
2007
1
2008
11
2009
19
2010
7
2011
17
2012
10
2013
13
2014
8
2015
7
2016
5
2017
9
2018
12
2019
10
2020
2
All-Time Record Progression
5 new records
5 all-time records were set at Pomeroy between 26 January 1957 and 20 January 2012. Each dot is a new record.
When Pomeroy set new all-time records
Date
Kind
Detail
1957-01-26
Record low minimum temperature
Record low minimum temperature -30.0 C (-22.0 F)
1964-12-17
Record low maximum temperature
Record low maximum temperature -18.9 C (-2.0 F)
1968-12-30
Record low maximum temperature
Record low maximum temperature -20.0 C (-4.0 F)
1968-12-30
Record low minimum temperature
Record low minimum temperature -32.8 C (-27.0 F)
2012-01-20
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
Wettest Day of Each Month
Jun: 65.5 mm (2.6 in)
The wettest day on record for each calendar month at Pomeroy. The most was 65.5 mm (2.6 in) on 26 June 1897.
Record daily precipitation for each month at Pomeroy
Month
Record daily precipitation (mm)
Date
Jan
43.4 mm (1.7 in)
2 January 1933
Feb
42.9 mm (1.7 in)
9 February 1899
Mar
57.2 mm (2.3 in)
31 March 1931
Apr
28.4 mm (1.1 in)
23 April 1996
May
50.8 mm (2.0 in)
30 May 2000
Jun
65.5 mm (2.6 in)
26 June 1897
Jul
26.7 mm (1.1 in)
3 July 1902
Aug
38.1 mm (1.5 in)
6 August 1991
Sep
36.8 mm (1.4 in)
26 September 1947
Oct
61.0 mm (2.4 in)
31 October 1994
Nov
50.8 mm (2.0 in)
1 November 1994
Dec
58.4 mm (2.3 in)
29 December 2017
Period of Record Coverage
1891 to 2020
Complete yearUnder 90 percent of days
110 years of record at Pomeroy, 1891 to 2020. 36 years have data for under 90 percent of days and are left out of rankings: 1891, 1892, 1893, 1894, 1895, 1896, 1897, 1898 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 57 complete years at Pomeroy, 1899 to 2013. 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 2011, at 8.6 C (47.4 F), and the warmest was 1934, at 11.9 C (53.4 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Pomeroy as warming stripes, 1899 to 2013
Year
Annual mean temperature
Difference from the station mean
1899
11.6 C
+1.22 C
1902
10.5 C
+0.19 C
1903
10.6 C
+0.21 C
1934
11.9 C
+1.55 C
1935
9.4 C
-0.91 C
1936
9.7 C
-0.67 C
1937
9.6 C
-0.75 C
1938
10.6 C
+0.24 C
1939
11.1 C
+0.78 C
1940
11.2 C
+0.84 C
1941
10.7 C
+0.34 C
1942
9.6 C
-0.78 C
1943
9.6 C
-0.73 C
1944
10.4 C
+0.02 C
1945
9.8 C
-0.55 C
1946
10.5 C
+0.14 C
1947
10.9 C
+0.57 C
1948
9.4 C
-0.96 C
1949
10.0 C
-0.35 C
1950
9.5 C
-0.84 C
1951
9.8 C
-0.59 C
1953
11.3 C
+0.92 C
1954
9.8 C
-0.57 C
1955
9.0 C
-1.36 C
1956
9.7 C
-0.69 C
1957
9.5 C
-0.81 C
1958
11.6 C
+1.24 C
1961
10.4 C
+0.03 C
1962
9.9 C
-0.50 C
1963
10.1 C
-0.21 C
1964
9.4 C
-0.91 C
1966
11.3 C
+0.91 C
1967
11.7 C
+1.32 C
1968
11.1 C
+0.72 C
1969
10.4 C
+0.01 C
1970
10.7 C
+0.30 C
1972
10.4 C
+0.01 C
1973
11.2 C
+0.82 C
1975
10.4 C
+0.04 C
1976
10.7 C
+0.32 C
1977
11.1 C
+0.78 C
1978
10.8 C
+0.48 C
1979
10.7 C
+0.37 C
1980
10.7 C
+0.30 C
1981
11.2 C
+0.89 C
1982
10.3 C
-0.01 C
1983
11.1 C
+0.74 C
1984
9.4 C
-0.91 C
1989
10.4 C
+0.05 C
1990
11.8 C
+1.44 C
1995
9.9 C
-0.49 C
1998
10.7 C
+0.39 C
1999
10.0 C
-0.36 C
2001
9.5 C
-0.87 C
2011
8.6 C
-1.80 C
2012
9.5 C
-0.89 C
2013
9.5 C
-0.84 C
The fitted trend in annual mean temperature here over 1899 to 2013 is -0.05 C (-0.13 to 0.03) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.2 to 0.1) per decade. The slope is a straight line fitted to 57 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Pomeroy
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.05 C (-0.13 to 0.03) per decade
-0.1 F (-0.2 to 0.1) per decade
1899 to 2013
57
Not clearly different from zero
Mean daily maximum
-0.02 C (-0.11 to 0.07) per decade
-0.03 F (-0.20 to 0.13) per decade
1899 to 2013
57
Not clearly different from zero
Mean daily minimum
-0.07 C (-0.17 to 0.02) per decade
-0.13 F (-0.31 to 0.04) per decade
1899 to 2013
57
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
1891 to 2020
Yearly extremes at Pomeroy: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
44.4 C (111.9 F)
1928
38.9 C (102.0 F)
110
Coldest night (TNn)
-32.8 C (-27.0 F)
1968
-18.0 C (-0.5 F)
110
Wettest day (Rx1day)
65.5 mm (2.6 in)
1897
23.3 mm (0.9 in)
110
Wettest five days (Rx5day)
124.8 mm (4.9 in)
1994
40.3 mm (1.6 in)
110
Longest dry spell (CDD)
78 days
1969
35 days
110
Hottest day (TXx)
The hottest day of the year at Pomeroy, 1891 to 2020. The record is 44.4 C (111.9 F) in 1928, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Pomeroy by year
Year
Hottest day (TXx)
1891
25.6 C (78.1 F)
1892
35.6 C (96.1 F)
1893
37.8 C (100.0 F)
1894
32.8 C (91.0 F)
1895
35.6 C (96.1 F)
1896
40.6 C (105.1 F)
1897
40.0 C (104.0 F)
1898
42.2 C (108.0 F)
1899
36.7 C (98.1 F)
1900
35.6 C (96.1 F)
1901
41.7 C (107.1 F)
1902
39.4 C (102.9 F)
1903
41.1 C (106.0 F)
1904
16.7 C (62.1 F)
1907
9.4 C (48.9 F)
1923
15.6 C (60.1 F)
1925
30.6 C (87.1 F)
1928
44.4 C (111.9 F)
1929
37.2 C (99.0 F)
1930
38.9 C (102.0 F)
1931
42.2 C (108.0 F)
1932
38.9 C (102.0 F)
1933
39.4 C (102.9 F)
1934
40.6 C (105.1 F)
1935
41.1 C (106.0 F)
1936
38.9 C (102.0 F)
1937
39.4 C (102.9 F)
1938
39.4 C (102.9 F)
1939
41.1 C (106.0 F)
1940
39.4 C (102.9 F)
1941
40.0 C (104.0 F)
1942
39.4 C (102.9 F)
1943
36.7 C (98.1 F)
1944
38.9 C (102.0 F)
1945
38.9 C (102.0 F)
1946
40.6 C (105.1 F)
1947
37.8 C (100.0 F)
1948
37.2 C (99.0 F)
1949
39.4 C (102.9 F)
1950
38.9 C (102.0 F)
1951
37.8 C (100.0 F)
1952
38.9 C (102.0 F)
1953
37.8 C (100.0 F)
1954
36.1 C (97.0 F)
1955
38.9 C (102.0 F)
1956
38.9 C (102.0 F)
1957
35.0 C (95.0 F)
1958
39.4 C (102.9 F)
1959
39.4 C (102.9 F)
1960
41.7 C (107.1 F)
1961
42.8 C (109.0 F)
1962
37.8 C (100.0 F)
1963
35.6 C (96.1 F)
1964
39.4 C (102.9 F)
1965
38.9 C (102.0 F)
1966
41.1 C (106.0 F)
1967
40.0 C (104.0 F)
1968
38.9 C (102.0 F)
1969
36.1 C (97.0 F)
1970
40.0 C (104.0 F)
1971
38.9 C (102.0 F)
1972
41.1 C (106.0 F)
1973
38.9 C (102.0 F)
1974
37.8 C (100.0 F)
1975
41.1 C (106.0 F)
1976
37.8 C (100.0 F)
1977
40.0 C (104.0 F)
1978
41.7 C (107.1 F)
1979
40.6 C (105.1 F)
1980
37.8 C (100.0 F)
1981
39.4 C (102.9 F)
1982
39.4 C (102.9 F)
1983
37.2 C (99.0 F)
1984
40.0 C (104.0 F)
1985
43.3 C (109.9 F)
1986
40.0 C (104.0 F)
1987
39.4 C (102.9 F)
1988
38.9 C (102.0 F)
1989
38.9 C (102.0 F)
1990
43.3 C (109.9 F)
1991
36.7 C (98.1 F)
1992
40.0 C (104.0 F)
1993
34.4 C (93.9 F)
1994
41.1 C (106.0 F)
1995
36.1 C (97.0 F)
1996
38.9 C (102.0 F)
1997
37.2 C (99.0 F)
1998
40.6 C (105.1 F)
1999
38.9 C (102.0 F)
2000
36.7 C (98.1 F)
2001
37.2 C (99.0 F)
2002
39.4 C (102.9 F)
2003
38.9 C (102.0 F)
2004
37.2 C (99.0 F)
2005
37.2 C (99.0 F)
2006
38.3 C (100.9 F)
2007
36.7 C (98.1 F)
2008
39.4 C (102.9 F)
2009
37.8 C (100.0 F)
2010
30.0 C (86.0 F)
2011
37.2 C (99.0 F)
2012
38.3 C (100.9 F)
2013
40.0 C (104.0 F)
2014
37.2 C (99.0 F)
2015
37.8 C (100.0 F)
2016
35.6 C (96.1 F)
2017
36.1 C (97.0 F)
2018
39.4 C (102.9 F)
2019
38.3 C (100.9 F)
2020
21.7 C (71.1 F)
Coldest night (TNn)
The coldest night of the year at Pomeroy, 1891 to 2020. The record is -32.8 C (-27.0 F) in 1968, marked on the chart; the median year is -18.0 C (-0.5 F).
Coldest night (TNn) at Pomeroy by year
Year
Coldest night (TNn)
1891
-8.3 C (17.1 F)
1892
-14.4 C (6.1 F)
1893
-5.0 C (23.0 F)
1894
-12.8 C (9.0 F)
1895
-8.3 C (17.1 F)
1896
-21.7 C (-7.1 F)
1897
-18.3 C (-0.9 F)
1898
-17.2 C (1.0 F)
1899
-24.4 C (-11.9 F)
1900
-16.7 C (1.9 F)
1901
-6.7 C (19.9 F)
1902
-23.3 C (-9.9 F)
1903
-10.6 C (12.9 F)
1904
-12.2 C (10.0 F)
1907
-16.1 C (3.0 F)
1923
-14.4 C (6.1 F)
1925
-0.6 C (30.9 F)
1928
6.7 C (44.1 F)
1929
-13.3 C (8.1 F)
1930
-28.3 C (-18.9 F)
1931
-17.8 C (0.0 F)
1932
-23.9 C (-11.0 F)
1933
-22.8 C (-9.0 F)
1934
-6.1 C (21.0 F)
1935
-26.1 C (-15.0 F)
1936
-26.7 C (-16.1 F)
1937
-27.8 C (-18.0 F)
1938
-15.6 C (3.9 F)
1939
-23.3 C (-9.9 F)
1940
-15.0 C (5.0 F)
1941
-13.9 C (7.0 F)
1942
-23.9 C (-11.0 F)
1943
-21.1 C (-6.0 F)
1944
-12.2 C (10.0 F)
1945
-16.1 C (3.0 F)
1946
-14.4 C (6.1 F)
1947
-20.6 C (-5.1 F)
1948
-18.3 C (-0.9 F)
1949
-21.1 C (-6.0 F)
1950
-27.8 C (-18.0 F)
1951
-18.3 C (-0.9 F)
1952
-22.2 C (-8.0 F)
1953
-6.7 C (19.9 F)
1954
-23.3 C (-9.9 F)
1955
-23.3 C (-9.9 F)
1956
-24.4 C (-11.9 F)
1957
-30.0 C (-22.0 F)
1958
-12.2 C (10.0 F)
1959
-22.8 C (-9.0 F)
1960
-22.8 C (-9.0 F)
1961
-23.3 C (-9.9 F)
1962
-21.1 C (-6.0 F)
1963
-22.8 C (-9.0 F)
1964
-27.2 C (-17.0 F)
1965
-12.2 C (10.0 F)
1966
-10.6 C (12.9 F)
1967
-15.6 C (3.9 F)
1968
-32.8 C (-27.0 F)
1969
-21.1 C (-6.0 F)
1970
-13.9 C (7.0 F)
1971
-12.2 C (10.0 F)
1972
-23.9 C (-11.0 F)
1973
-21.1 C (-6.0 F)
1974
-23.9 C (-11.0 F)
1975
-15.6 C (3.9 F)
1976
-12.2 C (10.0 F)
1977
-17.2 C (1.0 F)
1978
-23.9 C (-11.0 F)
1979
-25.0 C (-13.0 F)
1980
-19.4 C (-2.9 F)
1981
-15.6 C (3.9 F)
1982
-23.3 C (-9.9 F)
1983
-26.1 C (-15.0 F)
1984
-15.0 C (5.0 F)
1985
-20.0 C (-4.0 F)
1986
-11.1 C (12.0 F)
1987
-18.3 C (-0.9 F)
1988
-16.7 C (1.9 F)
1989
-26.1 C (-15.0 F)
1990
-26.7 C (-16.1 F)
1991
-12.8 C (9.0 F)
1992
-13.3 C (8.1 F)
1993
-18.3 C (-0.9 F)
1994
-17.2 C (1.0 F)
1995
-15.0 C (5.0 F)
1996
-27.2 C (-17.0 F)
1997
-13.3 C (8.1 F)
1998
-19.4 C (-2.9 F)
1999
-8.9 C (16.0 F)
2000
-15.6 C (3.9 F)
2001
-12.2 C (10.0 F)
2002
-13.9 C (7.0 F)
2003
-16.7 C (1.9 F)
2004
-26.1 C (-15.0 F)
2005
-15.6 C (3.9 F)
2006
-15.6 C (3.9 F)
2007
-18.9 C (-2.0 F)
2008
-23.3 C (-9.9 F)
2009
-18.9 C (-2.0 F)
2010
-25.0 C (-13.0 F)
2011
-18.3 C (-0.9 F)
2012
-10.6 C (12.9 F)
2013
-19.4 C (-2.9 F)
2014
-18.9 C (-2.0 F)
2015
-13.9 C (7.0 F)
2016
-17.8 C (0.0 F)
2017
-21.1 C (-6.0 F)
2018
-12.2 C (10.0 F)
2019
-15.0 C (5.0 F)
2020
-6.7 C (19.9 F)
Wettest day (Rx1day)
The wettest day of the year at Pomeroy, 1891 to 2020. The record is 65.5 mm (2.6 in) in 1897, marked on the chart; the median year is 23.3 mm (0.9 in).
Wettest day (Rx1day) at Pomeroy by year
Year
Wettest day (Rx1day)
1891
13.2 mm (0.5 in)
1892
16.3 mm (0.6 in)
1893
27.7 mm (1.1 in)
1894
29.2 mm (1.1 in)
1895
22.9 mm (0.9 in)
1896
27.9 mm (1.1 in)
1897
65.5 mm (2.6 in)
1898
24.1 mm (0.9 in)
1899
42.9 mm (1.7 in)
1900
25.4 mm (1.0 in)
1901
40.4 mm (1.6 in)
1902
26.7 mm (1.1 in)
1903
22.9 mm (0.9 in)
1904
21.6 mm (0.9 in)
1907
33.0 mm (1.3 in)
1923
23.1 mm (0.9 in)
1925
43.7 mm (1.7 in)
1928
6.6 mm (0.26 in)
1929
23.6 mm (0.9 in)
1930
28.7 mm (1.1 in)
1931
57.2 mm (2.3 in)
1932
26.2 mm (1.0 in)
1933
43.4 mm (1.7 in)
1934
19.3 mm (0.8 in)
1935
25.1 mm (1.0 in)
1936
21.6 mm (0.9 in)
1937
38.4 mm (1.5 in)
1938
23.9 mm (0.9 in)
1939
19.3 mm (0.8 in)
1940
23.4 mm (0.9 in)
1941
33.8 mm (1.3 in)
1942
20.6 mm (0.8 in)
1943
21.8 mm (0.9 in)
1944
20.3 mm (0.8 in)
1945
22.9 mm (0.9 in)
1946
24.1 mm (0.9 in)
1947
36.8 mm (1.4 in)
1948
31.2 mm (1.2 in)
1949
26.2 mm (1.0 in)
1950
27.2 mm (1.1 in)
1951
19.3 mm (0.8 in)
1952
10.7 mm (0.4 in)
1953
19.3 mm (0.8 in)
1954
16.8 mm (0.7 in)
1955
21.3 mm (0.8 in)
1956
19.1 mm (0.8 in)
1957
12.7 mm (0.5 in)
1958
33.0 mm (1.3 in)
1959
23.4 mm (0.9 in)
1960
15.7 mm (0.6 in)
1961
18.8 mm (0.7 in)
1962
17.8 mm (0.7 in)
1963
24.1 mm (0.9 in)
1964
28.7 mm (1.1 in)
1965
19.1 mm (0.8 in)
1966
28.4 mm (1.1 in)
1967
19.8 mm (0.8 in)
1968
30.7 mm (1.2 in)
1969
25.4 mm (1.0 in)
1970
22.9 mm (0.9 in)
1971
20.3 mm (0.8 in)
1972
22.6 mm (0.9 in)
1973
22.9 mm (0.9 in)
1974
20.8 mm (0.8 in)
1975
26.7 mm (1.1 in)
1976
17.8 mm (0.7 in)
1977
35.1 mm (1.4 in)
1978
22.4 mm (0.9 in)
1979
19.8 mm (0.8 in)
1980
22.9 mm (0.9 in)
1981
18.3 mm (0.7 in)
1982
24.9 mm (1.0 in)
1983
25.4 mm (1.0 in)
1984
24.1 mm (0.9 in)
1985
18.5 mm (0.7 in)
1986
18.0 mm (0.7 in)
1987
15.2 mm (0.6 in)
1988
36.8 mm (1.4 in)
1989
25.4 mm (1.0 in)
1990
18.8 mm (0.7 in)
1991
38.1 mm (1.5 in)
1992
30.0 mm (1.2 in)
1993
21.8 mm (0.9 in)
1994
61.0 mm (2.4 in)
1995
21.8 mm (0.9 in)
1996
39.9 mm (1.6 in)
1997
24.1 mm (0.9 in)
1998
23.4 mm (0.9 in)
1999
18.3 mm (0.7 in)
2000
50.8 mm (2.0 in)
2001
23.1 mm (0.9 in)
2002
18.5 mm (0.7 in)
2003
25.4 mm (1.0 in)
2004
20.3 mm (0.8 in)
2005
23.1 mm (0.9 in)
2006
17.0 mm (0.7 in)
2007
19.1 mm (0.8 in)
2008
19.3 mm (0.8 in)
2009
46.2 mm (1.8 in)
2010
23.4 mm (0.9 in)
2011
26.7 mm (1.1 in)
2012
41.9 mm (1.6 in)
2013
20.6 mm (0.8 in)
2014
17.8 mm (0.7 in)
2015
22.9 mm (0.9 in)
2016
29.2 mm (1.1 in)
2017
58.4 mm (2.3 in)
2018
22.9 mm (0.9 in)
2019
18.3 mm (0.7 in)
2020
31.0 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Pomeroy, 1891 to 2020. The record is 124.8 mm (4.9 in) in 1994, marked on the chart; the median year is 40.3 mm (1.6 in).
Wettest five days (Rx5day) at Pomeroy by year
Year
Wettest five days (Rx5day)
1891
12.2 mm (0.5 in)
1892
13.0 mm (0.5 in)
1893
77.7 mm (3.1 in)
1894
56.2 mm (2.2 in)
1895
30.2 mm (1.2 in)
1896
29.5 mm (1.2 in)
1897
73.9 mm (2.9 in)
1898
51.1 mm (2.0 in)
1899
86.1 mm (3.4 in)
1900
33.6 mm (1.3 in)
1901
31.5 mm (1.2 in)
1902
48.5 mm (1.9 in)
1903
56.7 mm (2.2 in)
1904
37.9 mm (1.5 in)
1907
34.8 mm (1.4 in)
1923
34.3 mm (1.4 in)
1925
44.2 mm (1.7 in)
1928
18.3 mm (0.7 in)
1929
68.9 mm (2.7 in)
1930
37.6 mm (1.5 in)
1931
74.4 mm (2.9 in)
1932
46.3 mm (1.8 in)
1933
60.7 mm (2.4 in)
1934
40.6 mm (1.6 in)
1935
38.3 mm (1.5 in)
1936
43.0 mm (1.7 in)
1937
52.7 mm (2.1 in)
1938
40.4 mm (1.6 in)
1939
46.0 mm (1.8 in)
1940
41.7 mm (1.6 in)
1941
51.1 mm (2.0 in)
1942
34.3 mm (1.4 in)
1943
36.5 mm (1.4 in)
1944
23.3 mm (0.9 in)
1945
39.8 mm (1.6 in)
1946
34.1 mm (1.3 in)
1947
55.1 mm (2.2 in)
1948
65.8 mm (2.6 in)
1949
31.0 mm (1.2 in)
1950
61.7 mm (2.4 in)
1951
61.7 mm (2.4 in)
1952
21.4 mm (0.8 in)
1953
49.0 mm (1.9 in)
1954
34.5 mm (1.4 in)
1955
39.6 mm (1.6 in)
1956
34.6 mm (1.4 in)
1957
37.6 mm (1.5 in)
1958
48.3 mm (1.9 in)
1959
39.9 mm (1.6 in)
1960
27.1 mm (1.1 in)
1961
36.3 mm (1.4 in)
1962
45.7 mm (1.8 in)
1963
30.6 mm (1.2 in)
1964
55.6 mm (2.2 in)
1965
32.0 mm (1.3 in)
1966
69.3 mm (2.7 in)
1967
28.2 mm (1.1 in)
1968
50.5 mm (2.0 in)
1969
63.5 mm (2.5 in)
1970
58.4 mm (2.3 in)
1971
36.1 mm (1.4 in)
1972
42.7 mm (1.7 in)
1973
40.4 mm (1.6 in)
1974
35.8 mm (1.4 in)
1975
43.2 mm (1.7 in)
1976
27.4 mm (1.1 in)
1977
55.9 mm (2.2 in)
1978
52.1 mm (2.1 in)
1979
29.0 mm (1.1 in)
1980
49.3 mm (1.9 in)
1981
37.9 mm (1.5 in)
1982
33.8 mm (1.3 in)
1983
30.2 mm (1.2 in)
1984
34.8 mm (1.4 in)
1985
36.6 mm (1.4 in)
1986
39.4 mm (1.6 in)
1987
31.7 mm (1.2 in)
1988
72.2 mm (2.8 in)
1989
69.8 mm (2.7 in)
1990
30.5 mm (1.2 in)
1991
71.1 mm (2.8 in)
1992
35.1 mm (1.4 in)
1993
63.4 mm (2.5 in)
1994
124.8 mm (4.9 in)
1995
37.9 mm (1.5 in)
1996
68.6 mm (2.7 in)
1997
34.0 mm (1.3 in)
1998
39.7 mm (1.6 in)
1999
25.9 mm (1.0 in)
2000
82.8 mm (3.3 in)
2001
33.3 mm (1.3 in)
2002
22.7 mm (0.9 in)
2003
63.6 mm (2.5 in)
2004
25.6 mm (1.0 in)
2005
35.7 mm (1.4 in)
2006
42.1 mm (1.7 in)
2007
43.6 mm (1.7 in)
2008
41.4 mm (1.6 in)
2009
65.7 mm (2.6 in)
2010
40.2 mm (1.6 in)
2011
35.3 mm (1.4 in)
2012
60.9 mm (2.4 in)
2013
33.1 mm (1.3 in)
2014
36.8 mm (1.4 in)
2015
41.9 mm (1.6 in)
2016
52.1 mm (2.1 in)
2017
64.8 mm (2.6 in)
2018
64.8 mm (2.6 in)
2019
34.6 mm (1.4 in)
2020
57.5 mm (2.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Pomeroy, 1891 to 2020. The record is 78 days in 1969, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Pomeroy by year
Year
Longest dry spell (CDD)
1891
23 days
1892
61 days
1893
20 days
1894
20 days
1895
55 days
1896
27 days
1897
59 days
1898
61 days
1899
42 days
1900
19 days
1901
24 days
1902
41 days
1903
32 days
1904
14 days
1907
12 days
1923
18 days
1925
9 days
1928
14 days
1929
32 days
1930
29 days
1931
41 days
1932
39 days
1933
30 days
1934
36 days
1935
18 days
1936
48 days
1937
29 days
1938
36 days
1939
50 days
1940
39 days
1941
19 days
1942
43 days
1943
37 days
1944
46 days
1945
50 days
1946
51 days
1947
31 days
1948
37 days
1949
54 days
1950
26 days
1951
62 days
1952
62 days
1953
35 days
1954
35 days
1955
48 days
1956
32 days
1957
59 days
1958
49 days
1959
51 days
1960
36 days
1961
23 days
1962
55 days
1963
35 days
1964
23 days
1965
28 days
1966
30 days
1967
43 days
1968
25 days
1969
78 days
1970
37 days
1971
23 days
1972
25 days
1973
41 days
1974
56 days
1975
39 days
1976
39 days
1977
35 days
1978
41 days
1979
43 days
1980
36 days
1981
46 days
1982
17 days
1983
22 days
1984
26 days
1985
46 days
1986
36 days
1987
61 days
1988
57 days
1989
23 days
1990
23 days
1991
62 days
1992
34 days
1993
25 days
1994
28 days
1995
12 days
1996
26 days
1997
31 days
1998
22 days
1999
53 days
2000
56 days
2001
56 days
2002
25 days
2003
28 days
2004
23 days
2005
32 days
2006
53 days
2007
30 days
2008
29 days
2009
23 days
2010
13 days
2011
34 days
2012
49 days
2013
30 days
2014
24 days
2015
41 days
2016
29 days
2017
35 days
2018
66 days
2019
33 days
2020
20 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
57 years with a frost
Across 57 years with a frost, the median last spring frost at Pomeroy falls on 5 May and the median first autumn frost on 2 October, which leaves a median of 151 days between them.
Fitted over all years, the growing season changes by +0.1 days per decade at this station.
Frost dates and growing season at Pomeroy
Measure
Median, all years
Earliest period
Recent period (1961 to 2013)
Recent against earliest
Fitted trend
Last spring frost
5 May
n/a
5 May
n/a
0.0 days per decade
First autumn frost
2 October
n/a
4 October
n/a
0.0 days per decade
Growing days
151 days
n/a
152 days
n/a
+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
72 years, 1899 to 2018
A day with at least 23.0 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 60.2 mm (2.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Pomeroy: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
23.0 mm (0.9 in)
5 years
30.0 mm (1.2 in)
10 years
35.7 mm (1.4 in)
25 years
44.2 mm (1.7 in)
50 years
51.6 mm (2.0 in)
100 years
60.2 mm (2.4 in)
Longer than the 72 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, 72 years of values from 1899 to 2018.
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: 58.4 mm (2.3 in) in 2017; 50.8 mm (2.0 in) in 2000; 46.2 mm (1.8 in) in 2009.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Pomeroy, at 1966. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1966 ran 0.4 C (0.7 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Pomeroy, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1966
+0.4
+0.7
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 Pomeroy standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Pomeroy 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.