Record envelope, standing records and threshold days for Greenwater (USC00453357), Washington, United States, with 43 years of record.
Key Facts for Greenwater
Greenwater (USC00453357) is a weather station in Washington, United States at 47.13 latitude and -121.63 longitude, 527 m (1,730 ft) above sea level.
The station reports from 1939 to 1981, 43 years of record.
1,464 records set at Greenwater still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Greenwater tied a daily record low minimum temperature of -2.2 C (28.0 F) on 5 May 1981.
About the Station
Location: Washington, United States, 47.13 latitude, -121.63 longitude.
Elevation: 527 m (1,730 ft).
Period of record: 1939 to 1981, 43 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 Greenwater. 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 Greenwater, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.7 C (62.1 F)
-22.2 C (-8.0 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-19.4 C (-2.9 F)
n/a
n/a
Mar
22.8 C (73.0 F)
-16.1 C (3.0 F)
n/a
n/a
Apr
28.9 C (84.0 F)
-7.2 C (19.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
38.9 C (102.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
36.1 C (97.0 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
19.4 C (66.9 F)
-16.1 C (3.0 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Greenwater still stand. 1972 holds the most, with 55.
Standing records at Greenwater by the year they were set
Year set
Standing records
1939
37
1940
42
1941
47
1942
19
1943
22
1944
29
1945
40
1946
16
1947
25
1948
38
1949
49
1950
31
1951
18
1952
34
1953
21
1954
26
1955
46
1956
41
1957
26
1958
46
1959
24
1960
29
1961
33
1962
29
1963
31
1964
28
1965
11
1966
21
1967
46
1968
44
1969
46
1970
39
1971
41
1972
55
1973
48
1974
35
1975
34
1976
39
1977
43
1978
35
1979
37
1980
35
1981
28
Wettest Day of Each Month
Feb: 94.2 mm (3.7 in)
The wettest day on record for each calendar month at Greenwater. The most was 94.2 mm (3.7 in) on 16 February 1939.
Record daily precipitation for each month at Greenwater
Month
Record daily precipitation (mm)
Date
Jan
91.9 mm (3.6 in)
28 January 1965
Feb
94.2 mm (3.7 in)
16 February 1939
Mar
66.0 mm (2.6 in)
7 March 1957
Apr
46.0 mm (1.8 in)
19 April 1965
May
68.6 mm (2.7 in)
15 May 1943
Jun
42.4 mm (1.7 in)
21 June 1948
Jul
33.5 mm (1.3 in)
28 July 1948
Aug
41.9 mm (1.6 in)
18 August 1975
Sep
82.3 mm (3.2 in)
26 September 1959
Oct
82.0 mm (3.2 in)
22 October 1959
Nov
79.5 mm (3.1 in)
18 November 1946
Dec
91.2 mm (3.6 in)
11 December 1946
Period of Record Coverage
1939 to 1981
Complete yearUnder 90 percent of days
43 years of record at Greenwater, 1939 to 1981. 7 years have data for under 90 percent of days and are left out of rankings: 1942, 1943, 1950, 1965, 1966, 1969, 1981.
Cooler than the station meanWarmer than the station mean
One stripe for each of 26 complete years at Greenwater, 1939 to 1980. Blue stripes are years cooler than the station's own mean of 7.6 C (45.6 F); red stripes are warmer. The coolest year was 1955, at 5.9 C (42.6 F), and the warmest was 1958, at 9.2 C (48.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Greenwater as warming stripes, 1939 to 1980
Year
Annual mean temperature
Difference from the station mean
1939
7.9 C
+0.28 C
1940
8.6 C
+1.01 C
1941
8.8 C
+1.21 C
1944
7.1 C
-0.45 C
1949
6.7 C
-0.90 C
1953
7.8 C
+0.20 C
1954
6.7 C
-0.91 C
1955
5.9 C
-1.68 C
1956
6.9 C
-0.70 C
1957
7.4 C
-0.22 C
1958
9.2 C
+1.60 C
1959
7.6 C
-0.02 C
1960
7.5 C
-0.06 C
1962
7.6 C
-0.02 C
1963
8.0 C
+0.44 C
1964
7.0 C
-0.57 C
1967
8.3 C
+0.69 C
1970
7.5 C
-0.05 C
1971
7.1 C
-0.51 C
1973
7.5 C
-0.11 C
1975
7.1 C
-0.49 C
1976
7.6 C
+0.06 C
1977
7.7 C
+0.09 C
1978
7.8 C
+0.26 C
1979
8.1 C
+0.49 C
1980
8.0 C
+0.38 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1939 to 1981
Yearly extremes at Greenwater: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
1941
33.3 C (91.9 F)
43
Coldest night (TNn)
-22.2 C (-8.0 F)
1950
-14.7 C (5.5 F)
42
Wettest day (Rx1day)
94.2 mm (3.7 in)
1939
60.2 mm (2.4 in)
43
Wettest five days (Rx5day)
303.2 mm (11.9 in)
1965
126.2 mm (5.0 in)
43
Longest dry spell (CDD)
51 days
1951
23 days
43
Hottest day (TXx)
The hottest day of the year at Greenwater, 1939 to 1981. The record is 38.9 C (102.0 F) in 1941, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Greenwater by year
Year
Hottest day (TXx)
1939
32.8 C (91.0 F)
1940
32.2 C (90.0 F)
1941
38.9 C (102.0 F)
1942
36.1 C (97.0 F)
1943
30.0 C (86.0 F)
1944
35.6 C (96.1 F)
1945
33.3 C (91.9 F)
1946
34.4 C (93.9 F)
1947
32.8 C (91.0 F)
1948
30.6 C (87.1 F)
1949
30.6 C (87.1 F)
1950
29.4 C (84.9 F)
1951
35.0 C (95.0 F)
1952
33.3 C (91.9 F)
1953
31.1 C (88.0 F)
1954
27.2 C (81.0 F)
1955
30.6 C (87.1 F)
1956
36.1 C (97.0 F)
1957
28.9 C (84.0 F)
1958
34.4 C (93.9 F)
1959
33.3 C (91.9 F)
1960
35.0 C (95.0 F)
1961
35.6 C (96.1 F)
1962
30.0 C (86.0 F)
1963
32.8 C (91.0 F)
1964
29.4 C (84.9 F)
1965
23.9 C (75.0 F)
1966
32.2 C (90.0 F)
1967
36.7 C (98.1 F)
1968
33.9 C (93.0 F)
1969
32.2 C (90.0 F)
1970
35.6 C (96.1 F)
1971
37.8 C (100.0 F)
1972
33.3 C (91.9 F)
1973
36.1 C (97.0 F)
1974
34.4 C (93.9 F)
1975
31.7 C (89.1 F)
1976
29.4 C (84.9 F)
1977
36.1 C (97.0 F)
1978
37.8 C (100.0 F)
1979
35.6 C (96.1 F)
1980
34.4 C (93.9 F)
1981
25.0 C (77.0 F)
Coldest night (TNn)
The coldest night of the year at Greenwater, 1939 to 1981. The record is -22.2 C (-8.0 F) in 1950, marked on the chart; the median year is -14.7 C (5.5 F).
Coldest night (TNn) at Greenwater by year
Year
Coldest night (TNn)
1939
-8.9 C (16.0 F)
1940
-7.8 C (18.0 F)
1941
-8.9 C (16.0 F)
1942
-12.8 C (9.0 F)
1943
-18.9 C (-2.0 F)
1944
-11.7 C (10.9 F)
1945
-10.6 C (12.9 F)
1946
-8.3 C (17.1 F)
1947
-12.2 C (10.0 F)
1948
-13.9 C (7.0 F)
1949
-17.2 C (1.0 F)
1950
-22.2 C (-8.0 F)
1951
n/a
1952
-10.0 C (14.0 F)
1953
-7.2 C (19.0 F)
1954
-15.6 C (3.9 F)
1955
-16.1 C (3.0 F)
1956
-16.7 C (1.9 F)
1957
-16.7 C (1.9 F)
1958
-8.9 C (16.0 F)
1959
-15.6 C (3.9 F)
1960
-11.7 C (10.9 F)
1961
-10.0 C (14.0 F)
1962
-17.8 C (0.0 F)
1963
-15.6 C (3.9 F)
1964
-17.2 C (1.0 F)
1965
-7.8 C (18.0 F)
1966
-6.1 C (21.0 F)
1967
-13.9 C (7.0 F)
1968
-20.0 C (-4.0 F)
1969
-19.4 C (-2.9 F)
1970
-15.0 C (5.0 F)
1971
-16.1 C (3.0 F)
1972
-19.4 C (-2.9 F)
1973
-17.8 C (0.0 F)
1974
-18.3 C (-0.9 F)
1975
-13.9 C (7.0 F)
1976
-14.4 C (6.1 F)
1977
-13.9 C (7.0 F)
1978
-15.6 C (3.9 F)
1979
-16.7 C (1.9 F)
1980
-21.1 C (-6.0 F)
1981
-8.3 C (17.1 F)
Wettest day (Rx1day)
The wettest day of the year at Greenwater, 1939 to 1981. The record is 94.2 mm (3.7 in) in 1939, marked on the chart; the median year is 60.2 mm (2.4 in).
Wettest day (Rx1day) at Greenwater by year
Year
Wettest day (Rx1day)
1939
94.2 mm (3.7 in)
1940
63.0 mm (2.5 in)
1941
43.7 mm (1.7 in)
1942
54.9 mm (2.2 in)
1943
69.6 mm (2.7 in)
1944
44.5 mm (1.8 in)
1945
85.9 mm (3.4 in)
1946
91.2 mm (3.6 in)
1947
49.0 mm (1.9 in)
1948
52.8 mm (2.1 in)
1949
61.0 mm (2.4 in)
1950
66.0 mm (2.6 in)
1951
39.4 mm (1.6 in)
1952
55.4 mm (2.2 in)
1953
83.8 mm (3.3 in)
1954
48.3 mm (1.9 in)
1955
73.2 mm (2.9 in)
1956
45.0 mm (1.8 in)
1957
66.0 mm (2.6 in)
1958
66.3 mm (2.6 in)
1959
82.3 mm (3.2 in)
1960
61.0 mm (2.4 in)
1961
60.2 mm (2.4 in)
1962
45.0 mm (1.8 in)
1963
55.1 mm (2.2 in)
1964
72.6 mm (2.9 in)
1965
91.9 mm (3.6 in)
1966
44.7 mm (1.8 in)
1967
48.3 mm (1.9 in)
1968
46.0 mm (1.8 in)
1969
64.8 mm (2.6 in)
1970
46.2 mm (1.8 in)
1971
61.2 mm (2.4 in)
1972
43.7 mm (1.7 in)
1973
46.5 mm (1.8 in)
1974
61.2 mm (2.4 in)
1975
83.1 mm (3.3 in)
1976
81.5 mm (3.2 in)
1977
71.9 mm (2.8 in)
1978
33.3 mm (1.3 in)
1979
55.1 mm (2.2 in)
1980
34.3 mm (1.4 in)
1981
52.1 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Greenwater, 1939 to 1981. The record is 303.2 mm (11.9 in) in 1965, marked on the chart; the median year is 126.2 mm (5.0 in).
Wettest five days (Rx5day) at Greenwater by year
Year
Wettest five days (Rx5day)
1939
112.5 mm (4.4 in)
1940
156.1 mm (6.1 in)
1941
112.5 mm (4.4 in)
1942
123.5 mm (4.9 in)
1943
116.9 mm (4.6 in)
1944
87.9 mm (3.5 in)
1945
132.6 mm (5.2 in)
1946
240.1 mm (9.5 in)
1947
126.0 mm (5.0 in)
1948
126.2 mm (5.0 in)
1949
152.1 mm (6.0 in)
1950
139.7 mm (5.5 in)
1951
124.8 mm (4.9 in)
1952
74.0 mm (2.9 in)
1953
190.5 mm (7.5 in)
1954
109.8 mm (4.3 in)
1955
129.7 mm (5.1 in)
1956
134.7 mm (5.3 in)
1957
103.9 mm (4.1 in)
1958
147.9 mm (5.8 in)
1959
174.0 mm (6.9 in)
1960
131.3 mm (5.2 in)
1961
114.9 mm (4.5 in)
1962
81.6 mm (3.2 in)
1963
102.6 mm (4.0 in)
1964
147.4 mm (5.8 in)
1965
303.2 mm (11.9 in)
1966
101.1 mm (4.0 in)
1967
123.2 mm (4.9 in)
1968
133.7 mm (5.3 in)
1969
170.9 mm (6.7 in)
1970
87.6 mm (3.4 in)
1971
172.1 mm (6.8 in)
1972
141.5 mm (5.6 in)
1973
81.4 mm (3.2 in)
1974
126.7 mm (5.0 in)
1975
211.2 mm (8.3 in)
1976
146.4 mm (5.8 in)
1977
153.4 mm (6.0 in)
1978
103.8 mm (4.1 in)
1979
101.1 mm (4.0 in)
1980
86.9 mm (3.4 in)
1981
110.5 mm (4.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Greenwater, 1939 to 1981. The record is 51 days in 1951, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Greenwater by year
Year
Longest dry spell (CDD)
1939
35 days
1940
25 days
1941
27 days
1942
38 days
1943
24 days
1944
18 days
1945
23 days
1946
24 days
1947
20 days
1948
13 days
1949
15 days
1950
30 days
1951
51 days
1952
23 days
1953
19 days
1954
23 days
1955
35 days
1956
23 days
1957
17 days
1958
34 days
1959
15 days
1960
35 days
1961
38 days
1962
20 days
1963
15 days
1964
10 days
1965
16 days
1966
25 days
1967
42 days
1968
12 days
1969
21 days
1970
26 days
1971
41 days
1972
24 days
1973
40 days
1974
30 days
1975
15 days
1976
20 days
1977
19 days
1978
15 days
1979
32 days
1980
18 days
1981
17 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
26 years with a frost
Across 26 years with a frost, the median last spring frost at Greenwater falls on 25 May and the median first autumn frost on 22 September, which leaves a median of 128 days between them.
Fitted over all years, the growing season changes by -23.4 days per decade at this station.
Frost dates and growing season at Greenwater
Measure
Median, all years
Earliest period
Recent period (1939 to 1980)
Recent against earliest
Fitted trend
Last spring frost
25 May
n/a
25 May
n/a
+7.8 days per decade
First autumn frost
22 September
n/a
22 September
n/a
-15.6 days per decade
Growing days
128 days
n/a
128 days
n/a
-23.4 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
36 years, 1939 to 1980
A day with at least 58.4 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 107.7 mm (4.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Greenwater: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
58.4 mm (2.3 in)
5 years
73.7 mm (2.9 in)
10 years
82.9 mm (3.3 in)
25 years
93.6 mm (3.7 in)
50 years
100.9 mm (4.0 in)
Longer than the 36 years of record
100 years
107.7 mm (4.2 in)
Longer than the 36 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, 36 years of values from 1939 to 1980.
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: 94.2 mm (3.7 in) in 1939; 91.2 mm (3.6 in) in 1946; 85.9 mm (3.4 in) in 1945.
Download the Data
Data for Greenwater standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Greenwater 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.