Record envelope, standing records and threshold days for Mission 4 W (USC00415972), Texas, United States, with 85 years of record.
Key Facts for Mission 4 W
Mission 4 W (USC00415972) is a weather station in Texas, United States at 26.22 latitude and -98.40 longitude, 41 m (133 ft) above sea level.
The station reports from 1910 to 1994, 85 years of record.
1,464 records set at Mission 4 W still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mission 4 W set a monthly record high maximum temperature of 37.2 C (99.0 F) on 28 November 1994.
About the Station
Location: Texas, United States, 26.22 latitude, -98.40 longitude.
Elevation: 41 m (133 ft).
Period of record: 1910 to 1994, 85 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 Mission 4 W. 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 Mission 4 W, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
34.4 C (93.9 F)
-7.8 C (18.0 F)
n/a
n/a
Feb
38.3 C (100.9 F)
-7.2 C (19.0 F)
n/a
n/a
Mar
40.6 C (105.1 F)
-2.8 C (27.0 F)
n/a
n/a
Apr
42.8 C (109.0 F)
3.9 C (39.0 F)
n/a
n/a
May
42.2 C (108.0 F)
8.9 C (48.0 F)
n/a
n/a
Jun
41.1 C (106.0 F)
14.4 C (57.9 F)
n/a
n/a
Jul
43.9 C (111.0 F)
17.2 C (63.0 F)
n/a
n/a
Aug
42.2 C (108.0 F)
16.7 C (62.1 F)
n/a
n/a
Sep
41.1 C (106.0 F)
10.6 C (51.1 F)
n/a
n/a
Oct
38.9 C (102.0 F)
0.6 C (33.1 F)
n/a
n/a
Nov
37.2 C (99.0 F)
-3.3 C (26.1 F)
n/a
n/a
Dec
36.1 C (97.0 F)
-8.9 C (16.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mission 4 W still stand. 1915 holds the most, with 53.
Standing records at Mission 4 W by the year they were set
Year set
Standing records
1911
18
1912
16
1913
8
1915
53
1916
11
1917
20
1921
31
1922
43
1923
37
1924
25
1925
23
1926
10
1927
20
1928
13
1929
11
1930
18
1931
15
1932
19
1933
18
1934
21
1935
15
1936
13
1937
18
1938
12
1939
21
1940
25
1941
4
1942
13
1943
12
1944
20
1945
23
1946
21
1947
27
1948
32
1949
15
1950
17
1951
23
1952
21
1953
15
1954
10
1955
23
1956
10
1957
24
1958
11
1959
20
1960
15
1961
14
1962
26
1963
14
1964
13
1965
16
1966
18
1967
21
1968
17
1969
10
1970
16
1971
8
1972
11
1973
13
1974
27
1975
19
1976
21
1977
12
1978
8
1979
19
1980
20
1981
12
1982
26
1983
16
1984
20
1985
18
1986
14
1987
19
1988
9
1989
37
1990
29
1991
22
1992
13
1993
2
1994
14
All-Time Record Progression
9 new records
9 all-time records were set at Mission 4 W between 29 January 1948 and 9 July 1994. Each dot is a new record.
When Mission 4 W set new all-time records
Date
Kind
Detail
1948-01-29
Record low maximum temperature
Record low maximum temperature 0.6 C (33.1 F)
1951-01-31
Record low maximum temperature
Record low maximum temperature -0.6 C (30.9 F)
1954-10-05
Record daily precipitation
Record daily precipitation 166.6 mm (6.6 in)
1967-09-21
Record daily precipitation
Record daily precipitation 282.2 mm (11.1 in)
1983-12-25
Record low maximum temperature
Record low maximum temperature -1.7 C (28.9 F)
1983-12-25
Record low minimum temperature
Record low minimum temperature -8.3 C (17.1 F)
1989-12-23
Record low maximum temperature
Record low maximum temperature -2.2 C (28.0 F)
1989-12-23
Record low minimum temperature
Record low minimum temperature -8.9 C (16.0 F)
1994-07-09
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
Wettest Day of Each Month
Sep: 282.2 mm (11.1 in)
The wettest day on record for each calendar month at Mission 4 W. The most was 282.2 mm (11.1 in) on 21 September 1967.
Record daily precipitation for each month at Mission 4 W
Month
Record daily precipitation (mm)
Date
Jan
107.2 mm (4.2 in)
5 January 1958
Feb
60.5 mm (2.4 in)
2 February 1948
Mar
67.8 mm (2.7 in)
12 March 1993
Apr
90.2 mm (3.6 in)
17 April 1979
May
128.8 mm (5.1 in)
30 May 1981
Jun
162.6 mm (6.4 in)
19 June 1966
Jul
99.6 mm (3.9 in)
13 July 1975
Aug
173.0 mm (6.8 in)
11 August 1980
Sep
282.2 mm (11.1 in)
21 September 1967
Oct
166.6 mm (6.6 in)
5 October 1954
Nov
113.0 mm (4.4 in)
7 November 1922
Dec
69.1 mm (2.7 in)
21 December 1940
Period of Record Coverage
1911 to 1994
Complete yearUnder 90 percent of days
82 years of record at Mission 4 W, 1911 to 1994. 14 years have data for under 90 percent of days and are left out of rankings: 1913, 1915, 1916, 1917, 1919, 1920, 1921, 1956 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 56 complete years at Mission 4 W, 1911 to 1992. Blue stripes are years cooler than the station's own mean of 23.4 C (74.1 F); red stripes are warmer. The coolest year was 1976, at 21.8 C (71.3 F), and the warmest was 1946, at 24.6 C (76.3 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Mission 4 W as warming stripes, 1911 to 1992
Year
Annual mean temperature
Difference from the station mean
1911
24.0 C
+0.60 C
1912
22.9 C
-0.43 C
1922
23.9 C
+0.57 C
1923
24.2 C
+0.81 C
1924
23.1 C
-0.25 C
1925
23.5 C
+0.09 C
1926
22.9 C
-0.43 C
1927
24.6 C
+1.22 C
1928
23.3 C
-0.06 C
1929
23.2 C
-0.18 C
1930
22.6 C
-0.74 C
1931
22.8 C
-0.54 C
1932
23.4 C
-0.02 C
1933
24.5 C
+1.11 C
1934
23.9 C
+0.52 C
1935
24.1 C
+0.70 C
1936
22.5 C
-0.89 C
1937
23.3 C
-0.04 C
1938
23.7 C
+0.37 C
1939
23.7 C
+0.32 C
1941
23.4 C
+0.02 C
1942
23.8 C
+0.39 C
1943
23.8 C
+0.42 C
1944
23.9 C
+0.52 C
1945
24.5 C
+1.17 C
1946
24.6 C
+1.26 C
1947
22.9 C
-0.43 C
1948
22.8 C
-0.55 C
1950
24.3 C
+0.94 C
1951
23.1 C
-0.28 C
1952
22.9 C
-0.44 C
1953
23.5 C
+0.12 C
1954
23.4 C
+0.05 C
1955
22.9 C
-0.50 C
1957
23.8 C
+0.39 C
1958
22.6 C
-0.76 C
1959
22.4 C
-0.94 C
1960
22.5 C
-0.84 C
1961
22.9 C
-0.46 C
1962
23.8 C
+0.45 C
1963
22.9 C
-0.46 C
1964
22.8 C
-0.55 C
1965
23.4 C
+0.03 C
1971
23.8 C
+0.42 C
1972
23.2 C
-0.19 C
1973
22.9 C
-0.47 C
1976
21.8 C
-1.56 C
1977
23.0 C
-0.37 C
1978
22.4 C
-0.95 C
1979
22.5 C
-0.85 C
1982
23.7 C
+0.30 C
1985
23.3 C
-0.08 C
1986
24.0 C
+0.60 C
1989
23.5 C
+0.15 C
1991
23.8 C
+0.46 C
1992
23.4 C
+0.04 C
The fitted trend in annual mean temperature here over 1911 to 1992 is -0.07 C (-0.14 to 0.01) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.12 F (-0.26 to 0.02) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Mission 4 W
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.07 C (-0.14 to 0.01) per decade
-0.12 F (-0.26 to 0.02) per decade
1911 to 1992
56
Not clearly different from zero
Mean daily maximum
-0.12 C (-0.23 to -0.02) per decade
-0.22 F (-0.41 to -0.04) per decade
1911 to 1992
56
Fall
Mean daily minimum
-0.01 C (-0.08 to 0.06) per decade
-0.02 F (-0.15 to 0.11) per decade
1911 to 1992
56
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
1910 to 1994
Yearly extremes at Mission 4 W: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
1994
40.0 C (104.0 F)
82
Coldest night (TNn)
-8.9 C (16.0 F)
1989
-1.7 C (28.9 F)
81
Wettest day (Rx1day)
282.2 mm (11.1 in)
1967
63.7 mm (2.5 in)
84
Wettest five days (Rx5day)
585.0 mm (23.0 in)
1967
90.9 mm (3.6 in)
84
Longest dry spell (CDD)
88 days
1950
46 days
84
Hottest day (TXx)
The hottest day of the year at Mission 4 W, 1910 to 1994. The record is 43.9 C (111.0 F) in 1994, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Mission 4 W by year
Year
Hottest day (TXx)
1910
n/a
1911
38.3 C (100.9 F)
1912
38.9 C (102.0 F)
1913
38.9 C (102.0 F)
1914
n/a
1915
41.1 C (106.0 F)
1916
37.8 C (100.0 F)
1917
40.6 C (105.1 F)
1919
26.7 C (80.1 F)
1920
31.7 C (89.1 F)
1921
40.6 C (105.1 F)
1922
40.6 C (105.1 F)
1923
43.3 C (109.9 F)
1924
40.6 C (105.1 F)
1925
41.1 C (106.0 F)
1926
38.3 C (100.9 F)
1927
40.0 C (104.0 F)
1928
40.6 C (105.1 F)
1929
38.9 C (102.0 F)
1930
39.4 C (102.9 F)
1931
39.4 C (102.9 F)
1932
40.6 C (105.1 F)
1933
39.4 C (102.9 F)
1934
39.4 C (102.9 F)
1935
40.6 C (105.1 F)
1936
40.6 C (105.1 F)
1937
42.2 C (108.0 F)
1938
39.4 C (102.9 F)
1939
42.8 C (109.0 F)
1940
42.2 C (108.0 F)
1941
38.9 C (102.0 F)
1942
41.1 C (106.0 F)
1943
41.1 C (106.0 F)
1944
41.7 C (107.1 F)
1945
41.1 C (106.0 F)
1946
41.7 C (107.1 F)
1947
39.4 C (102.9 F)
1948
42.2 C (108.0 F)
1949
41.7 C (107.1 F)
1950
39.4 C (102.9 F)
1951
38.9 C (102.0 F)
1952
38.9 C (102.0 F)
1953
40.0 C (104.0 F)
1954
43.3 C (109.9 F)
1955
42.2 C (108.0 F)
1956
38.3 C (100.9 F)
1957
38.9 C (102.0 F)
1958
40.0 C (104.0 F)
1959
38.9 C (102.0 F)
1960
40.6 C (105.1 F)
1961
38.9 C (102.0 F)
1962
40.6 C (105.1 F)
1963
41.1 C (106.0 F)
1964
40.6 C (105.1 F)
1965
38.9 C (102.0 F)
1966
39.4 C (102.9 F)
1967
40.0 C (104.0 F)
1968
39.4 C (102.9 F)
1969
41.1 C (106.0 F)
1970
39.4 C (102.9 F)
1971
38.9 C (102.0 F)
1972
38.3 C (100.9 F)
1973
41.7 C (107.1 F)
1974
41.1 C (106.0 F)
1975
38.9 C (102.0 F)
1976
37.8 C (100.0 F)
1977
40.0 C (104.0 F)
1978
39.4 C (102.9 F)
1979
40.0 C (104.0 F)
1980
40.6 C (105.1 F)
1981
39.4 C (102.9 F)
1982
40.0 C (104.0 F)
1983
40.6 C (105.1 F)
1984
41.7 C (107.1 F)
1985
39.4 C (102.9 F)
1986
40.6 C (105.1 F)
1987
39.4 C (102.9 F)
1988
41.1 C (106.0 F)
1989
42.8 C (109.0 F)
1990
41.1 C (106.0 F)
1991
41.1 C (106.0 F)
1992
41.7 C (107.1 F)
1993
40.0 C (104.0 F)
1994
43.9 C (111.0 F)
Coldest night (TNn)
The coldest night of the year at Mission 4 W, 1910 to 1994. The record is -8.9 C (16.0 F) in 1989, marked on the chart; the median year is -1.7 C (28.9 F).
Coldest night (TNn) at Mission 4 W by year
Year
Coldest night (TNn)
1910
n/a
1911
-7.8 C (18.0 F)
1912
-5.6 C (21.9 F)
1913
-0.6 C (30.9 F)
1914
n/a
1915
2.2 C (36.0 F)
1916
-2.8 C (27.0 F)
1917
-4.4 C (24.1 F)
1919
0.0 C (32.0 F)
1920
n/a
1921
-0.6 C (30.9 F)
1922
-1.1 C (30.0 F)
1923
-2.8 C (27.0 F)
1924
-3.3 C (26.1 F)
1925
-4.4 C (24.1 F)
1926
-2.2 C (28.0 F)
1927
-3.3 C (26.1 F)
1928
-1.7 C (28.9 F)
1929
-3.3 C (26.1 F)
1930
-6.7 C (19.9 F)
1931
0.0 C (32.0 F)
1932
-3.3 C (26.1 F)
1933
-2.8 C (27.0 F)
1934
1.7 C (35.1 F)
1935
-4.4 C (24.1 F)
1936
-1.1 C (30.0 F)
1937
1.7 C (35.1 F)
1938
-0.6 C (30.9 F)
1939
-1.1 C (30.0 F)
1940
-3.3 C (26.1 F)
1941
-0.6 C (30.9 F)
1942
-1.1 C (30.0 F)
1943
-2.2 C (28.0 F)
1944
-2.2 C (28.0 F)
1945
0.0 C (32.0 F)
1946
0.6 C (33.1 F)
1947
-1.7 C (28.9 F)
1948
-2.8 C (27.0 F)
1949
-7.2 C (19.0 F)
1950
-3.9 C (25.0 F)
1951
-7.2 C (19.0 F)
1952
0.6 C (33.1 F)
1953
-1.7 C (28.9 F)
1954
0.6 C (33.1 F)
1955
-3.3 C (26.1 F)
1956
0.0 C (32.0 F)
1957
-1.1 C (30.0 F)
1958
-1.1 C (30.0 F)
1959
0.0 C (32.0 F)
1960
-1.7 C (28.9 F)
1961
0.0 C (32.0 F)
1962
-7.8 C (18.0 F)
1963
-4.4 C (24.1 F)
1964
-1.1 C (30.0 F)
1965
-1.1 C (30.0 F)
1966
-4.4 C (24.1 F)
1967
-2.8 C (27.0 F)
1968
-2.2 C (28.0 F)
1969
-3.9 C (25.0 F)
1970
-3.3 C (26.1 F)
1971
-0.6 C (30.9 F)
1972
0.0 C (32.0 F)
1973
-5.6 C (21.9 F)
1974
-1.7 C (28.9 F)
1975
-4.4 C (24.1 F)
1976
-3.3 C (26.1 F)
1977
-3.9 C (25.0 F)
1978
-6.7 C (19.9 F)
1979
-6.7 C (19.9 F)
1980
-0.6 C (30.9 F)
1981
1.7 C (35.1 F)
1982
-2.8 C (27.0 F)
1983
-8.3 C (17.1 F)
1984
0.0 C (32.0 F)
1985
-4.4 C (24.1 F)
1986
2.2 C (36.0 F)
1987
0.6 C (33.1 F)
1988
-0.6 C (30.9 F)
1989
-8.9 C (16.0 F)
1990
-1.7 C (28.9 F)
1991
1.1 C (34.0 F)
1992
-1.1 C (30.0 F)
1993
0.0 C (32.0 F)
1994
1.1 C (34.0 F)
Wettest day (Rx1day)
The wettest day of the year at Mission 4 W, 1910 to 1994. The record is 282.2 mm (11.1 in) in 1967, marked on the chart; the median year is 63.7 mm (2.5 in).
Wettest day (Rx1day) at Mission 4 W by year
Year
Wettest day (Rx1day)
1910
143.5 mm (5.6 in)
1911
39.9 mm (1.6 in)
1912
129.5 mm (5.1 in)
1913
29.2 mm (1.1 in)
1914
55.1 mm (2.2 in)
1915
38.9 mm (1.5 in)
1916
51.6 mm (2.0 in)
1917
19.8 mm (0.8 in)
1919
24.1 mm (0.9 in)
1920
48.3 mm (1.9 in)
1921
29.0 mm (1.1 in)
1922
113.0 mm (4.4 in)
1923
55.9 mm (2.2 in)
1924
63.5 mm (2.5 in)
1925
90.2 mm (3.6 in)
1926
122.4 mm (4.8 in)
1927
90.4 mm (3.6 in)
1928
45.5 mm (1.8 in)
1929
65.5 mm (2.6 in)
1930
67.3 mm (2.6 in)
1931
47.8 mm (1.9 in)
1932
60.2 mm (2.4 in)
1933
102.9 mm (4.1 in)
1934
57.2 mm (2.3 in)
1935
60.2 mm (2.4 in)
1936
76.2 mm (3.0 in)
1937
41.9 mm (1.6 in)
1938
82.3 mm (3.2 in)
1939
41.4 mm (1.6 in)
1940
72.1 mm (2.8 in)
1941
103.4 mm (4.1 in)
1942
117.9 mm (4.6 in)
1943
88.9 mm (3.5 in)
1944
96.5 mm (3.8 in)
1945
83.8 mm (3.3 in)
1946
110.0 mm (4.3 in)
1947
81.3 mm (3.2 in)
1948
60.5 mm (2.4 in)
1949
39.6 mm (1.6 in)
1950
50.8 mm (2.0 in)
1951
56.9 mm (2.2 in)
1952
41.1 mm (1.6 in)
1953
51.6 mm (2.0 in)
1954
166.6 mm (6.6 in)
1955
44.5 mm (1.8 in)
1956
40.9 mm (1.6 in)
1957
50.8 mm (2.0 in)
1958
107.2 mm (4.2 in)
1959
51.6 mm (2.0 in)
1960
87.4 mm (3.4 in)
1961
143.0 mm (5.6 in)
1962
47.5 mm (1.9 in)
1963
55.9 mm (2.2 in)
1964
40.6 mm (1.6 in)
1965
63.8 mm (2.5 in)
1966
162.6 mm (6.4 in)
1967
282.2 mm (11.1 in)
1968
80.3 mm (3.2 in)
1969
71.6 mm (2.8 in)
1970
57.2 mm (2.3 in)
1971
46.0 mm (1.8 in)
1972
51.8 mm (2.0 in)
1973
79.0 mm (3.1 in)
1974
95.3 mm (3.8 in)
1975
99.6 mm (3.9 in)
1976
67.6 mm (2.7 in)
1977
56.9 mm (2.2 in)
1978
61.5 mm (2.4 in)
1979
90.2 mm (3.6 in)
1980
173.0 mm (6.8 in)
1981
128.8 mm (5.1 in)
1982
25.4 mm (1.0 in)
1983
62.7 mm (2.5 in)
1984
99.8 mm (3.9 in)
1985
127.0 mm (5.0 in)
1986
33.8 mm (1.3 in)
1987
72.4 mm (2.9 in)
1988
84.3 mm (3.3 in)
1989
46.5 mm (1.8 in)
1990
68.3 mm (2.7 in)
1991
65.3 mm (2.6 in)
1992
54.6 mm (2.1 in)
1993
141.0 mm (5.6 in)
1994
56.9 mm (2.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mission 4 W, 1910 to 1994. The record is 585.0 mm (23.0 in) in 1967, marked on the chart; the median year is 90.9 mm (3.6 in).
Wettest five days (Rx5day) at Mission 4 W by year
Year
Wettest five days (Rx5day)
1910
165.9 mm (6.5 in)
1911
42.9 mm (1.7 in)
1912
153.6 mm (6.0 in)
1913
29.2 mm (1.1 in)
1914
80.8 mm (3.2 in)
1915
88.9 mm (3.5 in)
1916
58.2 mm (2.3 in)
1917
24.3 mm (1.0 in)
1919
49.5 mm (1.9 in)
1920
48.3 mm (1.9 in)
1921
40.7 mm (1.6 in)
1922
135.7 mm (5.3 in)
1923
63.0 mm (2.5 in)
1924
71.9 mm (2.8 in)
1925
172.8 mm (6.8 in)
1926
135.9 mm (5.4 in)
1927
90.4 mm (3.6 in)
1928
68.4 mm (2.7 in)
1929
80.6 mm (3.2 in)
1930
89.7 mm (3.5 in)
1931
67.7 mm (2.7 in)
1932
62.8 mm (2.5 in)
1933
141.5 mm (5.6 in)
1934
111.0 mm (4.4 in)
1935
150.1 mm (5.9 in)
1936
135.6 mm (5.3 in)
1937
67.0 mm (2.6 in)
1938
127.8 mm (5.0 in)
1939
54.6 mm (2.1 in)
1940
126.5 mm (5.0 in)
1941
125.4 mm (4.9 in)
1942
141.3 mm (5.6 in)
1943
114.3 mm (4.5 in)
1944
127.4 mm (5.0 in)
1945
83.8 mm (3.3 in)
1946
136.2 mm (5.4 in)
1947
169.5 mm (6.7 in)
1948
94.7 mm (3.7 in)
1949
70.3 mm (2.8 in)
1950
53.3 mm (2.1 in)
1951
91.4 mm (3.6 in)
1952
42.9 mm (1.7 in)
1953
88.0 mm (3.5 in)
1954
220.9 mm (8.7 in)
1955
55.6 mm (2.2 in)
1956
40.9 mm (1.6 in)
1957
65.5 mm (2.6 in)
1958
141.8 mm (5.6 in)
1959
59.3 mm (2.3 in)
1960
105.9 mm (4.2 in)
1961
156.4 mm (6.2 in)
1962
59.0 mm (2.3 in)
1963
64.3 mm (2.5 in)
1964
87.2 mm (3.4 in)
1965
163.4 mm (6.4 in)
1966
213.9 mm (8.4 in)
1967
585.0 mm (23.0 in)
1968
141.3 mm (5.6 in)
1969
71.6 mm (2.8 in)
1970
81.9 mm (3.2 in)
1971
105.4 mm (4.1 in)
1972
104.1 mm (4.1 in)
1973
154.3 mm (6.1 in)
1974
116.6 mm (4.6 in)
1975
192.6 mm (7.6 in)
1976
163.6 mm (6.4 in)
1977
127.8 mm (5.0 in)
1978
112.3 mm (4.4 in)
1979
117.2 mm (4.6 in)
1980
249.2 mm (9.8 in)
1981
131.6 mm (5.2 in)
1982
49.2 mm (1.9 in)
1983
63.2 mm (2.5 in)
1984
123.4 mm (4.9 in)
1985
154.7 mm (6.1 in)
1986
45.5 mm (1.8 in)
1987
72.4 mm (2.9 in)
1988
84.3 mm (3.3 in)
1989
66.5 mm (2.6 in)
1990
80.1 mm (3.2 in)
1991
77.0 mm (3.0 in)
1992
84.1 mm (3.3 in)
1993
169.5 mm (6.7 in)
1994
93.5 mm (3.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mission 4 W, 1910 to 1994. The record is 88 days in 1950, marked on the chart; the median year is 46 days.
Longest dry spell (CDD) at Mission 4 W by year
Year
Longest dry spell (CDD)
1910
48 days
1911
40 days
1912
63 days
1913
30 days
1914
12 days
1915
43 days
1916
48 days
1917
45 days
1919
14 days
1920
35 days
1921
61 days
1922
46 days
1923
61 days
1924
33 days
1925
72 days
1926
45 days
1927
36 days
1928
39 days
1929
49 days
1930
27 days
1931
68 days
1932
55 days
1933
45 days
1934
34 days
1935
44 days
1936
33 days
1937
49 days
1938
39 days
1939
32 days
1940
47 days
1941
23 days
1942
57 days
1943
66 days
1944
39 days
1945
62 days
1946
64 days
1947
39 days
1948
47 days
1949
36 days
1950
88 days
1951
39 days
1952
50 days
1953
58 days
1954
50 days
1955
31 days
1956
40 days
1957
56 days
1958
46 days
1959
55 days
1960
47 days
1961
42 days
1962
47 days
1963
41 days
1964
47 days
1965
53 days
1966
75 days
1967
34 days
1968
32 days
1969
43 days
1970
46 days
1971
36 days
1972
43 days
1973
39 days
1974
45 days
1975
52 days
1976
44 days
1977
68 days
1978
62 days
1979
57 days
1980
75 days
1981
58 days
1982
84 days
1983
64 days
1984
63 days
1985
55 days
1986
36 days
1987
27 days
1988
36 days
1989
50 days
1990
51 days
1991
37 days
1992
25 days
1993
31 days
1994
41 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 Mission 4 W falls on 7 February and the median first autumn frost on 16 December, which leaves a median of 312 days between them.
Fitted over all years, the growing season changes by -2.7 days per decade at this station.
Frost dates and growing season at Mission 4 W
Measure
Median, all years
Earliest period
Recent period (1911 to 1989)
Recent against earliest
Fitted trend
Last spring frost
7 February
n/a
7 February
n/a
+2.6 days per decade
First autumn frost
16 December
n/a
16 December
n/a
-0.1 days per decade
Growing days
312 days
n/a
312 days
n/a
-2.7 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
74 years, 1911 to 1994
A day with at least 69.0 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 236.6 mm (9.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Mission 4 W: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
69.0 mm (2.7 in)
5 years
101.9 mm (4.0 in)
10 years
127.8 mm (5.0 in)
25 years
166.2 mm (6.5 in)
50 years
199.2 mm (7.8 in)
100 years
236.6 mm (9.3 in)
Longer than the 74 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, 74 years of values from 1911 to 1994.
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: 282.2 mm (11.1 in) in 1967; 173.0 mm (6.8 in) in 1980; 166.6 mm (6.6 in) in 1954.
Station Changes
3 suspected
3 changes were suspected in the annual mean temperature of Mission 4 W, at 1947, 1957 and 1982. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1947 ran 0.8 C (1.4 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1957 ran 0.5 C (0.9 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1982 ran 0.3 C (0.6 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Mission 4 W, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1947
-0.7
-1.3
possible
5
1957
+0.5
+0.9
likely
5
1982
+0.3
+0.6
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 Mission 4 W standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mission 4 W 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.