Record envelope, standing records and threshold days for Wenatchee 6 SW (USC00459077), Washington, United States, with 39 years of record.
Key Facts for Wenatchee 6 SW
Wenatchee 6 SW (USC00459077) is a weather station in Washington, United States at 47.37 latitude and -120.37 longitude, 671 m (2,201 ft) above sea level.
The station reports from 1899 to 1937, 39 years of record.
1,464 records set at Wenatchee 6 SW still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Wenatchee 6 SW set a daily record precipitation of 22.1 mm (0.9 in) on 22 March 1937.
About the Station
Location: Washington, United States, 47.37 latitude, -120.37 longitude.
Elevation: 671 m (2,201 ft).
Period of record: 1899 to 1937, 39 years.
Eligible elements: tmax, tmin, prcp.
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 Wenatchee 6 SW. 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 Wenatchee 6 SW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.6 C (60.1 F)
-26.7 C (-16.1 F)
n/a
n/a
Feb
18.3 C (64.9 F)
-25.6 C (-14.1 F)
n/a
n/a
Mar
23.9 C (75.0 F)
-13.9 C (7.0 F)
n/a
n/a
Apr
30.6 C (87.1 F)
-9.4 C (15.1 F)
n/a
n/a
May
34.4 C (93.9 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
0.6 C (33.1 F)
n/a
n/a
Jul
41.7 C (107.1 F)
3.9 C (39.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
3.3 C (37.9 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-4.4 C (24.1 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-10.6 C (12.9 F)
n/a
n/a
Nov
20.0 C (68.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Dec
16.1 C (61.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Wenatchee 6 SW still stand. 1900 holds the most, with 66.
Standing records at Wenatchee 6 SW by the year they were set
Year set
Standing records
1899
59
1900
66
1901
52
1902
24
1903
33
1904
31
1905
35
1906
42
1907
32
1908
31
1909
51
1910
34
1911
35
1912
34
1913
36
1914
23
1915
21
1916
44
1917
61
1918
35
1919
44
1920
27
1921
16
1922
32
1923
19
1924
60
1925
39
1926
40
1927
23
1928
34
1929
39
1930
44
1931
28
1932
31
1933
44
1934
59
1935
50
1936
55
1937
1
Wettest Day of Each Month
May: 93.2 mm (3.7 in)
The wettest day on record for each calendar month at Wenatchee 6 SW. The most was 93.2 mm (3.7 in) on 16 May 1921.
Record daily precipitation for each month at Wenatchee 6 SW
Month
Record daily precipitation (mm)
Date
Jan
46.5 mm (1.8 in)
11 January 1932
Feb
59.4 mm (2.3 in)
2 February 1916
Mar
39.4 mm (1.6 in)
10 March 1904
Apr
15.7 mm (0.6 in)
2 April 1902
May
93.2 mm (3.7 in)
16 May 1921
Jun
53.8 mm (2.1 in)
7 June 1936
Jul
25.1 mm (1.0 in)
2 July 1916
Aug
16.8 mm (0.7 in)
20 August 1923
Sep
31.0 mm (1.2 in)
12 September 1903
Oct
44.5 mm (1.8 in)
18 October 1920
Nov
30.5 mm (1.2 in)
11 November 1903
Dec
52.8 mm (2.1 in)
6 December 1923
Period of Record Coverage
1899 to 1937
Complete yearUnder 90 percent of days
39 years of record at Wenatchee 6 SW, 1899 to 1937. 2 years have data for under 90 percent of days and are left out of rankings: 1899, 1937.
Cooler than the station meanWarmer than the station mean
One stripe for each of 35 complete years at Wenatchee 6 SW, 1900 to 1936. Blue stripes are years cooler than the station's own mean of 9.0 C (48.2 F); red stripes are warmer. The coolest year was 1916, at 7.0 C (44.5 F), and the warmest was 1934, at 11.3 C (52.3 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Wenatchee 6 SW as warming stripes, 1900 to 1936
Year
Annual mean temperature
Difference from the station mean
1900
9.0 C
-0.05 C
1901
8.6 C
-0.37 C
1902
8.6 C
-0.43 C
1903
8.2 C
-0.83 C
1904
9.4 C
+0.35 C
1905
8.7 C
-0.33 C
1906
9.6 C
+0.58 C
1907
8.9 C
-0.11 C
1908
9.3 C
+0.33 C
1909
8.1 C
-0.93 C
1910
9.0 C
+0.04 C
1912
8.5 C
-0.54 C
1913
7.8 C
-1.18 C
1914
8.9 C
-0.15 C
1915
9.3 C
+0.34 C
1916
7.0 C
-2.03 C
1917
8.9 C
-0.13 C
1918
9.7 C
+0.70 C
1919
8.4 C
-0.60 C
1920
9.0 C
+0.02 C
1921
8.7 C
-0.30 C
1922
8.1 C
-0.94 C
1923
9.3 C
+0.28 C
1925
10.6 C
+1.56 C
1926
10.4 C
+1.41 C
1927
8.5 C
-0.49 C
1928
9.6 C
+0.63 C
1929
8.6 C
-0.38 C
1930
9.0 C
-0.05 C
1931
9.7 C
+0.69 C
1932
9.2 C
+0.20 C
1933
9.1 C
+0.13 C
1934
11.3 C
+2.27 C
1935
8.9 C
-0.12 C
1936
9.4 C
+0.44 C
The annual mean temperature here has risen by 0.26 C (0.03 to 0.50) per decade over 1900 to 1936. In Fahrenheit: 0.48 F (0.05 to 0.90) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Wenatchee 6 SW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.26 C (0.03 to 0.50) per decade
0.48 F (0.05 to 0.90) per decade
1900 to 1936
35
Rise
Mean daily maximum
0.2 C (-0.1 to 0.5) per decade
0.3 F (-0.2 to 0.9) per decade
1900 to 1936
35
Not clearly different from zero
Mean daily minimum
0.3 C (0.1 to 0.6) per decade
0.6 F (0.2 to 1.1) per decade
1900 to 1936
35
Rise
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
1899 to 1937
Yearly extremes at Wenatchee 6 SW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1928
37.2 C (99.0 F)
39
Coldest night (TNn)
-26.7 C (-16.1 F)
1909
-20.0 C (-4.0 F)
39
Wettest day (Rx1day)
93.2 mm (3.7 in)
1921
29.7 mm (1.2 in)
39
Wettest five days (Rx5day)
96.3 mm (3.8 in)
1921
43.4 mm (1.7 in)
39
Longest dry spell (CDD)
90 days
1921
52 days
39
Hottest day (TXx)
The hottest day of the year at Wenatchee 6 SW, 1899 to 1937. The record is 41.7 C (107.1 F) in 1928, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Wenatchee 6 SW by year
Year
Hottest day (TXx)
1899
37.2 C (99.0 F)
1900
36.1 C (97.0 F)
1901
36.1 C (97.0 F)
1902
36.7 C (98.1 F)
1903
36.1 C (97.0 F)
1904
37.2 C (99.0 F)
1905
38.3 C (100.9 F)
1906
37.8 C (100.0 F)
1907
36.1 C (97.0 F)
1908
36.1 C (97.0 F)
1909
35.0 C (95.0 F)
1910
35.0 C (95.0 F)
1911
37.8 C (100.0 F)
1912
36.1 C (97.0 F)
1913
36.1 C (97.0 F)
1914
35.0 C (95.0 F)
1915
35.6 C (96.1 F)
1916
33.3 C (91.9 F)
1917
37.8 C (100.0 F)
1918
37.8 C (100.0 F)
1919
38.3 C (100.9 F)
1920
37.2 C (99.0 F)
1921
33.9 C (93.0 F)
1922
37.2 C (99.0 F)
1923
35.6 C (96.1 F)
1924
39.4 C (102.9 F)
1925
37.8 C (100.0 F)
1926
40.0 C (104.0 F)
1927
37.2 C (99.0 F)
1928
41.7 C (107.1 F)
1929
38.3 C (100.9 F)
1930
38.9 C (102.0 F)
1931
38.3 C (100.9 F)
1932
36.1 C (97.0 F)
1933
37.8 C (100.0 F)
1934
39.4 C (102.9 F)
1935
40.0 C (104.0 F)
1936
37.2 C (99.0 F)
1937
13.3 C (55.9 F)
Coldest night (TNn)
The coldest night of the year at Wenatchee 6 SW, 1899 to 1937. The record is -26.7 C (-16.1 F) in 1909, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Wenatchee 6 SW by year
Year
Coldest night (TNn)
1899
-15.0 C (5.0 F)
1900
-19.4 C (-2.9 F)
1901
-21.1 C (-6.0 F)
1902
-20.0 C (-4.0 F)
1903
-15.6 C (3.9 F)
1904
-17.2 C (1.0 F)
1905
-20.6 C (-5.1 F)
1906
-13.9 C (7.0 F)
1907
-20.6 C (-5.1 F)
1908
-16.1 C (3.0 F)
1909
-26.7 C (-16.1 F)
1910
-17.2 C (1.0 F)
1911
-21.7 C (-7.1 F)
1912
-18.9 C (-2.0 F)
1913
-17.2 C (1.0 F)
1914
-17.8 C (0.0 F)
1915
-17.2 C (1.0 F)
1916
-25.0 C (-13.0 F)
1917
-21.7 C (-7.1 F)
1918
-16.1 C (3.0 F)
1919
-24.4 C (-11.9 F)
1920
-13.9 C (7.0 F)
1921
-17.2 C (1.0 F)
1922
-21.7 C (-7.1 F)
1923
-22.2 C (-8.0 F)
1924
-23.3 C (-9.9 F)
1925
-11.1 C (12.0 F)
1926
-20.0 C (-4.0 F)
1927
-22.8 C (-9.0 F)
1928
-17.8 C (0.0 F)
1929
-23.9 C (-11.0 F)
1930
-23.3 C (-9.9 F)
1931
-16.1 C (3.0 F)
1932
-20.0 C (-4.0 F)
1933
-22.8 C (-9.0 F)
1934
-11.1 C (12.0 F)
1935
-24.4 C (-11.9 F)
1936
-25.6 C (-14.1 F)
1937
-21.1 C (-6.0 F)
Wettest day (Rx1day)
The wettest day of the year at Wenatchee 6 SW, 1899 to 1937. The record is 93.2 mm (3.7 in) in 1921, marked on the chart; the median year is 29.7 mm (1.2 in).
Wettest day (Rx1day) at Wenatchee 6 SW by year
Year
Wettest day (Rx1day)
1899
14.7 mm (0.6 in)
1900
20.3 mm (0.8 in)
1901
33.8 mm (1.3 in)
1902
48.3 mm (1.9 in)
1903
31.0 mm (1.2 in)
1904
39.4 mm (1.6 in)
1905
39.4 mm (1.6 in)
1906
29.2 mm (1.1 in)
1907
34.5 mm (1.4 in)
1908
31.2 mm (1.2 in)
1909
25.1 mm (1.0 in)
1910
21.3 mm (0.8 in)
1911
19.3 mm (0.8 in)
1912
30.0 mm (1.2 in)
1913
24.1 mm (0.9 in)
1914
29.7 mm (1.2 in)
1915
22.1 mm (0.9 in)
1916
59.4 mm (2.3 in)
1917
38.6 mm (1.5 in)
1918
35.3 mm (1.4 in)
1919
21.6 mm (0.9 in)
1920
44.5 mm (1.8 in)
1921
93.2 mm (3.7 in)
1922
24.6 mm (1.0 in)
1923
52.8 mm (2.1 in)
1924
14.7 mm (0.6 in)
1925
50.0 mm (2.0 in)
1926
16.8 mm (0.7 in)
1927
33.8 mm (1.3 in)
1928
22.9 mm (0.9 in)
1929
27.7 mm (1.1 in)
1930
17.8 mm (0.7 in)
1931
20.8 mm (0.8 in)
1932
46.5 mm (1.8 in)
1933
35.6 mm (1.4 in)
1934
26.4 mm (1.0 in)
1935
21.8 mm (0.9 in)
1936
53.8 mm (2.1 in)
1937
22.1 mm (0.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wenatchee 6 SW, 1899 to 1937. The record is 96.3 mm (3.8 in) in 1921, marked on the chart; the median year is 43.4 mm (1.7 in).
Wettest five days (Rx5day) at Wenatchee 6 SW by year
Year
Wettest five days (Rx5day)
1899
39.5 mm (1.6 in)
1900
45.5 mm (1.8 in)
1901
47.5 mm (1.9 in)
1902
56.9 mm (2.2 in)
1903
50.9 mm (2.0 in)
1904
53.1 mm (2.1 in)
1905
65.9 mm (2.6 in)
1906
72.8 mm (2.9 in)
1907
43.4 mm (1.7 in)
1908
40.4 mm (1.6 in)
1909
35.8 mm (1.4 in)
1910
31.2 mm (1.2 in)
1911
49.6 mm (2.0 in)
1912
39.4 mm (1.6 in)
1913
29.4 mm (1.2 in)
1914
37.2 mm (1.5 in)
1915
40.6 mm (1.6 in)
1916
81.0 mm (3.2 in)
1917
75.2 mm (3.0 in)
1918
35.3 mm (1.4 in)
1919
37.6 mm (1.5 in)
1920
52.4 mm (2.1 in)
1921
96.3 mm (3.8 in)
1922
35.8 mm (1.4 in)
1923
63.8 mm (2.5 in)
1924
36.3 mm (1.4 in)
1925
50.6 mm (2.0 in)
1926
25.9 mm (1.0 in)
1927
33.8 mm (1.3 in)
1928
31.1 mm (1.2 in)
1929
39.4 mm (1.6 in)
1930
23.4 mm (0.9 in)
1931
36.3 mm (1.4 in)
1932
47.3 mm (1.9 in)
1933
83.4 mm (3.3 in)
1934
54.1 mm (2.1 in)
1935
23.3 mm (0.9 in)
1936
81.7 mm (3.2 in)
1937
74.1 mm (2.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wenatchee 6 SW, 1899 to 1937. The record is 90 days in 1921, marked on the chart; the median year is 52 days.
Longest dry spell (CDD) at Wenatchee 6 SW by year
Year
Longest dry spell (CDD)
1899
29 days
1900
44 days
1901
67 days
1902
34 days
1903
29 days
1904
43 days
1905
57 days
1906
66 days
1907
36 days
1908
52 days
1909
54 days
1910
40 days
1911
35 days
1912
39 days
1913
55 days
1914
55 days
1915
41 days
1916
55 days
1917
72 days
1918
46 days
1919
46 days
1920
43 days
1921
90 days
1922
77 days
1923
39 days
1924
37 days
1925
65 days
1926
63 days
1927
61 days
1928
39 days
1929
73 days
1930
53 days
1931
74 days
1932
53 days
1933
39 days
1934
49 days
1935
57 days
1936
65 days
1937
15 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
35 years with a frost
Across 35 years with a frost, the median last spring frost at Wenatchee 6 SW falls on 21 April and the median first autumn frost on 23 October, which leaves a median of 180 days between them.
Fitted over all years, the growing season changes by +2.1 days per decade at this station.
Frost dates and growing season at Wenatchee 6 SW
Measure
Median, all years
Earliest period
Recent period (1905 to 1936)
Recent against earliest
Fitted trend
Last spring frost
21 April
n/a
21 April
n/a
-5.0 days per decade
First autumn frost
23 October
n/a
23 October
n/a
-2.9 days per decade
Growing days
180 days
n/a
182 days
n/a
+2.1 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
37 years, 1900 to 1936
A day with at least 29.7 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 91.6 mm (3.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Wenatchee 6 SW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
29.7 mm (1.2 in)
5 years
42.3 mm (1.7 in)
10 years
52.0 mm (2.0 in)
25 years
66.2 mm (2.6 in)
50 years
78.2 mm (3.1 in)
Longer than the 37 years of record
100 years
91.6 mm (3.6 in)
Longer than the 37 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, 37 years of values from 1900 to 1936.
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: 93.2 mm (3.7 in) in 1921; 59.4 mm (2.3 in) in 1916; 53.8 mm (2.1 in) in 1936.
Download the Data
Data for Wenatchee 6 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wenatchee 6 SW 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.