Record envelope, standing records and threshold days for La Plata 1 W (USC00185080), Maryland, United States, with 105 years of record.
Key Facts for La Plata 1 W
La Plata 1 W (USC00185080) is a weather station in Maryland, United States at 38.53 latitude and -77.00 longitude, 43 m (140 ft) above sea level.
The station reports from 1894 to 1998, 105 years of record.
1,464 records set at La Plata 1 W still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
La Plata 1 W set a daily record high minimum temperature of 23.3 C (73.9 F) on 28 August 1998.
About the Station
Location: Maryland, United States, 38.53 latitude, -77.00 longitude.
Elevation: 43 m (140 ft).
Period of record: 1894 to 1998, 105 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 La Plata 1 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 La Plata 1 W, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
26.1 C (79.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Feb
27.8 C (82.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Mar
32.8 C (91.0 F)
-17.2 C (1.0 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-9.4 C (15.1 F)
n/a
n/a
May
36.7 C (98.1 F)
-2.8 C (27.0 F)
n/a
n/a
Jun
37.8 C (100.0 F)
3.3 C (37.9 F)
n/a
n/a
Jul
42.2 C (108.0 F)
7.8 C (46.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
5.6 C (42.1 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-7.2 C (19.0 F)
n/a
n/a
Nov
30.0 C (86.0 F)
-14.4 C (6.1 F)
n/a
n/a
Dec
26.1 C (79.0 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 La Plata 1 W still stand. 1930 holds the most, with 48.
Standing records at La Plata 1 W by the year they were set
Year set
Standing records
1894
4
1895
38
1910
8
1911
16
1920
17
1921
22
1922
10
1923
10
1924
19
1925
27
1926
12
1927
18
1928
16
1929
28
1930
48
1931
7
1932
17
1933
25
1934
30
1935
19
1936
26
1937
16
1938
15
1939
20
1940
6
1941
7
1942
22
1943
29
1944
15
1945
26
1946
16
1947
26
1948
13
1949
21
1950
23
1951
16
1952
19
1953
16
1954
33
1955
15
1956
25
1957
24
1958
16
1959
19
1960
21
1961
22
1962
13
1963
20
1964
24
1965
25
1966
12
1967
19
1968
18
1969
10
1970
14
1971
17
1972
25
1973
10
1974
14
1975
12
1976
19
1977
18
1978
10
1979
26
1980
13
1981
12
1982
13
1983
21
1984
26
1985
12
1986
11
1987
5
1988
19
1989
16
1990
23
1991
22
1992
18
1993
8
1994
5
1995
2
1996
12
1997
11
1998
11
All-Time Record Progression
1 new records
1 all-time records were set at La Plata 1 W between 27 August 1971 and 27 August 1971. Each dot is a new record.
When La Plata 1 W set new all-time records
Date
Kind
Detail
1971-08-27
Record daily precipitation
Record daily precipitation 248.9 mm (9.8 in)
Wettest Day of Each Month
Aug: 248.9 mm (9.8 in)
The wettest day on record for each calendar month at La Plata 1 W. The most was 248.9 mm (9.8 in) on 27 August 1971.
Record daily precipitation for each month at La Plata 1 W
Month
Record daily precipitation (mm)
Date
Jan
75.2 mm (3.0 in)
3 January 1911
Feb
55.9 mm (2.2 in)
4 February 1920
Mar
60.5 mm (2.4 in)
26 March 1978
Apr
79.2 mm (3.1 in)
8 April 1940
May
56.6 mm (2.2 in)
16 May 1983
Jun
190.2 mm (7.5 in)
22 June 1972
Jul
106.7 mm (4.2 in)
13 July 1975
Aug
248.9 mm (9.8 in)
27 August 1971
Sep
150.4 mm (5.9 in)
5 September 1935
Oct
138.4 mm (5.4 in)
14 October 1955
Nov
77.2 mm (3.0 in)
13 November 1937
Dec
55.9 mm (2.2 in)
18 December 1977
Period of Record Coverage
1894 to 1998
Complete yearUnder 90 percent of days
85 years of record at La Plata 1 W, 1894 to 1998. 11 years have data for under 90 percent of days and are left out of rankings: 1894, 1896, 1910, 1911, 1919, 1940, 1941, 1952 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 67 complete years at La Plata 1 W, 1895 to 1997. Blue stripes are years cooler than the station's own mean of 13.4 C (56.2 F); red stripes are warmer. The coolest year was 1958, at 12.1 C (53.7 F), and the warmest was 1949, at 15.0 C (59.0 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at La Plata 1 W as warming stripes, 1895 to 1997
Year
Annual mean temperature
Difference from the station mean
1895
12.8 C
-0.64 C
1920
12.7 C
-0.72 C
1921
14.7 C
+1.28 C
1922
13.7 C
+0.23 C
1923
13.5 C
+0.10 C
1925
13.8 C
+0.33 C
1926
12.9 C
-0.51 C
1927
13.7 C
+0.28 C
1928
13.8 C
+0.38 C
1929
14.1 C
+0.66 C
1930
14.3 C
+0.86 C
1931
14.0 C
+0.61 C
1932
13.5 C
+0.10 C
1933
13.4 C
-0.03 C
1934
12.7 C
-0.77 C
1935
12.9 C
-0.49 C
1936
13.1 C
-0.37 C
1937
13.2 C
-0.25 C
1938
13.7 C
+0.27 C
1939
13.7 C
+0.30 C
1942
13.8 C
+0.38 C
1943
13.7 C
+0.32 C
1944
13.6 C
+0.14 C
1945
13.7 C
+0.23 C
1946
13.5 C
+0.10 C
1947
13.3 C
-0.14 C
1949
15.0 C
+1.59 C
1950
13.5 C
+0.08 C
1951
13.7 C
+0.23 C
1954
13.9 C
+0.51 C
1955
13.1 C
-0.30 C
1956
13.1 C
-0.30 C
1957
13.4 C
-0.04 C
1958
12.1 C
-1.36 C
1959
13.8 C
+0.42 C
1960
12.4 C
-1.00 C
1961
13.0 C
-0.38 C
1962
12.4 C
-0.98 C
1963
12.7 C
-0.75 C
1964
13.4 C
-0.06 C
1965
13.2 C
-0.23 C
1968
12.9 C
-0.51 C
1969
12.8 C
-0.61 C
1970
13.4 C
-0.05 C
1971
13.6 C
+0.13 C
1972
13.1 C
-0.33 C
1973
14.2 C
+0.77 C
1974
13.8 C
+0.33 C
1975
13.7 C
+0.31 C
1976
13.1 C
-0.30 C
1977
13.6 C
+0.20 C
1978
12.6 C
-0.80 C
1979
12.9 C
-0.49 C
1980
13.1 C
-0.31 C
1981
12.8 C
-0.61 C
1982
13.2 C
-0.24 C
1983
13.4 C
-0.07 C
1985
13.8 C
+0.40 C
1986
13.6 C
+0.21 C
1987
13.6 C
+0.18 C
1988
13.0 C
-0.39 C
1989
12.9 C
-0.50 C
1990
14.7 C
+1.30 C
1991
14.7 C
+1.29 C
1992
13.0 C
-0.39 C
1993
13.4 C
+0.02 C
1997
13.9 C
+0.46 C
The fitted trend in annual mean temperature here over 1895 to 1997 is -0.01 C (-0.07 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.02 F (-0.13 to 0.09) per decade. The slope is a straight line fitted to 67 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at La Plata 1 W
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.01 C (-0.07 to 0.05) per decade
-0.02 F (-0.13 to 0.09) per decade
1895 to 1997
67
Not clearly different from zero
Mean daily maximum
-0.07 C (-0.14 to 0.00) per decade
-0.13 F (-0.26 to 0.00) per decade
1895 to 1997
67
Fall
Mean daily minimum
0.05 C (-0.03 to 0.13) per decade
0.09 F (-0.05 to 0.23) per decade
1895 to 1997
67
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
1894 to 1998
Yearly extremes at La Plata 1 W: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1930
35.6 C (96.1 F)
85
Coldest night (TNn)
-22.2 C (-8.0 F)
1934
-15.0 C (5.0 F)
85
Wettest day (Rx1day)
248.9 mm (9.8 in)
1971
62.2 mm (2.4 in)
85
Wettest five days (Rx5day)
256.5 mm (10.1 in)
1971
98.1 mm (3.9 in)
83
Longest dry spell (CDD)
41 days
1895
18 days
83
Hottest day (TXx)
The hottest day of the year at La Plata 1 W, 1894 to 1998. The record is 42.2 C (108.0 F) in 1930, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at La Plata 1 W by year
Year
Hottest day (TXx)
1894
17.8 C (64.0 F)
1895
37.8 C (100.0 F)
1896
20.0 C (68.0 F)
1910
34.4 C (93.9 F)
1911
38.9 C (102.0 F)
1919
6.7 C (44.1 F)
1920
35.0 C (95.0 F)
1921
36.7 C (98.1 F)
1922
35.0 C (95.0 F)
1923
36.1 C (97.0 F)
1924
37.8 C (100.0 F)
1925
37.8 C (100.0 F)
1926
37.2 C (99.0 F)
1927
36.7 C (98.1 F)
1928
35.0 C (95.0 F)
1929
36.1 C (97.0 F)
1930
42.2 C (108.0 F)
1931
36.7 C (98.1 F)
1932
38.3 C (100.9 F)
1933
36.1 C (97.0 F)
1934
38.9 C (102.0 F)
1935
36.1 C (97.0 F)
1936
38.9 C (102.0 F)
1937
35.6 C (96.1 F)
1938
35.0 C (95.0 F)
1939
37.8 C (100.0 F)
1940
27.2 C (81.0 F)
1941
36.1 C (97.0 F)
1942
37.8 C (100.0 F)
1943
37.2 C (99.0 F)
1944
37.8 C (100.0 F)
1945
37.2 C (99.0 F)
1946
35.6 C (96.1 F)
1947
36.7 C (98.1 F)
1948
36.1 C (97.0 F)
1949
37.8 C (100.0 F)
1950
36.7 C (98.1 F)
1951
36.1 C (97.0 F)
1952
38.9 C (102.0 F)
1953
38.9 C (102.0 F)
1954
39.4 C (102.9 F)
1955
36.7 C (98.1 F)
1956
35.6 C (96.1 F)
1957
37.8 C (100.0 F)
1958
34.4 C (93.9 F)
1959
36.7 C (98.1 F)
1960
35.6 C (96.1 F)
1961
35.6 C (96.1 F)
1962
35.6 C (96.1 F)
1963
35.6 C (96.1 F)
1964
36.1 C (97.0 F)
1965
35.6 C (96.1 F)
1966
37.2 C (99.0 F)
1967
33.9 C (93.0 F)
1968
35.6 C (96.1 F)
1969
36.7 C (98.1 F)
1970
35.0 C (95.0 F)
1971
33.3 C (91.9 F)
1972
34.4 C (93.9 F)
1973
35.0 C (95.0 F)
1974
33.9 C (93.0 F)
1975
35.0 C (95.0 F)
1976
35.0 C (95.0 F)
1977
36.1 C (97.0 F)
1978
34.4 C (93.9 F)
1979
32.8 C (91.0 F)
1980
37.2 C (99.0 F)
1981
34.4 C (93.9 F)
1982
32.2 C (90.0 F)
1983
39.4 C (102.9 F)
1984
32.8 C (91.0 F)
1985
35.0 C (95.0 F)
1986
32.8 C (91.0 F)
1987
35.0 C (95.0 F)
1988
37.2 C (99.0 F)
1989
32.8 C (91.0 F)
1990
34.4 C (93.9 F)
1991
36.1 C (97.0 F)
1992
33.3 C (91.9 F)
1993
33.9 C (93.0 F)
1994
21.1 C (70.0 F)
1995
28.9 C (84.0 F)
1996
35.6 C (96.1 F)
1997
37.2 C (99.0 F)
1998
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at La Plata 1 W, 1894 to 1998. The record is -22.2 C (-8.0 F) in 1934, marked on the chart; the median year is -15.0 C (5.0 F).
Coldest night (TNn) at La Plata 1 W by year
Year
Coldest night (TNn)
1894
-14.4 C (6.1 F)
1895
-16.7 C (1.9 F)
1896
-3.9 C (25.0 F)
1910
-13.9 C (7.0 F)
1911
-12.2 C (10.0 F)
1919
-9.4 C (15.1 F)
1920
-13.3 C (8.1 F)
1921
-12.2 C (10.0 F)
1922
-13.3 C (8.1 F)
1923
-11.7 C (10.9 F)
1924
-15.6 C (3.9 F)
1925
-16.7 C (1.9 F)
1926
-14.4 C (6.1 F)
1927
-13.9 C (7.0 F)
1928
-13.3 C (8.1 F)
1929
-14.4 C (6.1 F)
1930
-15.0 C (5.0 F)
1931
-12.8 C (9.0 F)
1932
-12.2 C (10.0 F)
1933
-15.0 C (5.0 F)
1934
-22.2 C (-8.0 F)
1935
-22.2 C (-8.0 F)
1936
-20.0 C (-4.0 F)
1937
-12.2 C (10.0 F)
1938
-11.7 C (10.9 F)
1939
-11.7 C (10.9 F)
1940
-18.3 C (-0.9 F)
1941
-8.9 C (16.0 F)
1942
-20.0 C (-4.0 F)
1943
-16.7 C (1.9 F)
1944
-11.7 C (10.9 F)
1945
-14.4 C (6.1 F)
1946
-15.0 C (5.0 F)
1947
-15.0 C (5.0 F)
1948
-16.7 C (1.9 F)
1949
-10.6 C (12.9 F)
1950
-12.8 C (9.0 F)
1951
-15.0 C (5.0 F)
1952
-12.8 C (9.0 F)
1953
-12.2 C (10.0 F)
1954
-13.3 C (8.1 F)
1955
-16.7 C (1.9 F)
1956
-11.7 C (10.9 F)
1957
-22.2 C (-8.0 F)
1958
-17.2 C (1.0 F)
1959
-18.9 C (-2.0 F)
1960
-17.2 C (1.0 F)
1961
-21.7 C (-7.1 F)
1962
-15.6 C (3.9 F)
1963
-17.8 C (0.0 F)
1964
-20.6 C (-5.1 F)
1965
-17.2 C (1.0 F)
1966
-17.8 C (0.0 F)
1967
-16.1 C (3.0 F)
1968
-18.3 C (-0.9 F)
1969
-13.9 C (7.0 F)
1970
-20.0 C (-4.0 F)
1971
-17.2 C (1.0 F)
1972
-17.8 C (0.0 F)
1973
-13.9 C (7.0 F)
1974
-13.3 C (8.1 F)
1975
-12.2 C (10.0 F)
1976
-16.1 C (3.0 F)
1977
-20.6 C (-5.1 F)
1978
-13.9 C (7.0 F)
1979
-18.9 C (-2.0 F)
1980
-17.2 C (1.0 F)
1981
-18.9 C (-2.0 F)
1982
-21.1 C (-6.0 F)
1983
-17.2 C (1.0 F)
1984
-22.2 C (-8.0 F)
1985
-21.7 C (-7.1 F)
1986
-12.8 C (9.0 F)
1987
-19.4 C (-2.9 F)
1988
-16.1 C (3.0 F)
1989
-16.1 C (3.0 F)
1990
-10.0 C (14.0 F)
1991
-10.0 C (14.0 F)
1992
-11.1 C (12.0 F)
1993
-15.0 C (5.0 F)
1994
-20.6 C (-5.1 F)
1995
-8.3 C (17.1 F)
1996
-18.3 C (-0.9 F)
1997
-13.3 C (8.1 F)
1998
-8.3 C (17.1 F)
Wettest day (Rx1day)
The wettest day of the year at La Plata 1 W, 1894 to 1998. The record is 248.9 mm (9.8 in) in 1971, marked on the chart; the median year is 62.2 mm (2.4 in).
Wettest day (Rx1day) at La Plata 1 W by year
Year
Wettest day (Rx1day)
1894
33.0 mm (1.3 in)
1895
50.8 mm (2.0 in)
1896
30.5 mm (1.2 in)
1910
74.7 mm (2.9 in)
1911
75.2 mm (3.0 in)
1919
2.8 mm (0.11 in)
1920
76.7 mm (3.0 in)
1921
53.3 mm (2.1 in)
1922
57.9 mm (2.3 in)
1923
47.5 mm (1.9 in)
1924
87.6 mm (3.4 in)
1925
50.8 mm (2.0 in)
1926
62.2 mm (2.4 in)
1927
62.2 mm (2.4 in)
1928
127.0 mm (5.0 in)
1929
57.2 mm (2.3 in)
1930
42.9 mm (1.7 in)
1931
54.6 mm (2.1 in)
1932
86.1 mm (3.4 in)
1933
139.2 mm (5.5 in)
1934
68.1 mm (2.7 in)
1935
150.4 mm (5.9 in)
1936
60.5 mm (2.4 in)
1937
77.2 mm (3.0 in)
1938
81.0 mm (3.2 in)
1939
88.9 mm (3.5 in)
1940
79.2 mm (3.1 in)
1941
52.3 mm (2.1 in)
1942
94.0 mm (3.7 in)
1943
71.1 mm (2.8 in)
1944
119.4 mm (4.7 in)
1945
85.1 mm (3.4 in)
1946
45.7 mm (1.8 in)
1947
50.8 mm (2.0 in)
1948
63.5 mm (2.5 in)
1949
54.6 mm (2.1 in)
1950
104.1 mm (4.1 in)
1951
59.7 mm (2.4 in)
1952
105.4 mm (4.1 in)
1953
106.7 mm (4.2 in)
1954
51.8 mm (2.0 in)
1955
138.4 mm (5.4 in)
1956
55.4 mm (2.2 in)
1957
56.4 mm (2.2 in)
1958
65.8 mm (2.6 in)
1959
69.1 mm (2.7 in)
1960
122.2 mm (4.8 in)
1961
52.3 mm (2.1 in)
1962
54.6 mm (2.1 in)
1963
73.7 mm (2.9 in)
1964
57.7 mm (2.3 in)
1965
55.4 mm (2.2 in)
1966
83.6 mm (3.3 in)
1967
69.1 mm (2.7 in)
1968
51.6 mm (2.0 in)
1969
57.9 mm (2.3 in)
1970
66.8 mm (2.6 in)
1971
248.9 mm (9.8 in)
1972
190.2 mm (7.5 in)
1973
80.3 mm (3.2 in)
1974
57.9 mm (2.3 in)
1975
106.7 mm (4.2 in)
1976
120.7 mm (4.8 in)
1977
55.9 mm (2.2 in)
1978
60.5 mm (2.4 in)
1979
97.5 mm (3.8 in)
1980
46.2 mm (1.8 in)
1981
53.6 mm (2.1 in)
1982
56.6 mm (2.2 in)
1983
56.6 mm (2.2 in)
1984
45.7 mm (1.8 in)
1985
100.1 mm (3.9 in)
1986
63.2 mm (2.5 in)
1987
120.9 mm (4.8 in)
1988
44.7 mm (1.8 in)
1989
132.3 mm (5.2 in)
1990
54.6 mm (2.1 in)
1991
40.4 mm (1.6 in)
1992
74.9 mm (2.9 in)
1993
67.1 mm (2.6 in)
1994
55.9 mm (2.2 in)
1995
57.2 mm (2.3 in)
1996
55.9 mm (2.2 in)
1997
56.4 mm (2.2 in)
1998
50.0 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at La Plata 1 W, 1894 to 1998. The record is 256.5 mm (10.1 in) in 1971, marked on the chart; the median year is 98.1 mm (3.9 in).
Wettest five days (Rx5day) at La Plata 1 W by year
Year
Wettest five days (Rx5day)
1894
38.1 mm (1.5 in)
1895
91.4 mm (3.6 in)
1896
n/a
1910
133.8 mm (5.3 in)
1911
75.2 mm (3.0 in)
1919
n/a
1920
93.8 mm (3.7 in)
1921
94.3 mm (3.7 in)
1922
66.0 mm (2.6 in)
1923
94.6 mm (3.7 in)
1924
104.7 mm (4.1 in)
1925
62.0 mm (2.4 in)
1926
98.7 mm (3.9 in)
1927
97.2 mm (3.8 in)
1928
232.2 mm (9.1 in)
1929
98.3 mm (3.9 in)
1930
71.7 mm (2.8 in)
1931
108.7 mm (4.3 in)
1932
110.2 mm (4.3 in)
1933
179.6 mm (7.1 in)
1934
123.2 mm (4.9 in)
1935
249.2 mm (9.8 in)
1936
79.8 mm (3.1 in)
1937
137.6 mm (5.4 in)
1938
154.7 mm (6.1 in)
1939
166.4 mm (6.6 in)
1940
109.4 mm (4.3 in)
1941
53.6 mm (2.1 in)
1942
170.2 mm (6.7 in)
1943
91.4 mm (3.6 in)
1944
152.4 mm (6.0 in)
1945
182.9 mm (7.2 in)
1946
88.9 mm (3.5 in)
1947
88.9 mm (3.5 in)
1948
91.4 mm (3.6 in)
1949
78.7 mm (3.1 in)
1950
218.3 mm (8.6 in)
1951
73.1 mm (2.9 in)
1952
130.2 mm (5.1 in)
1953
120.0 mm (4.7 in)
1954
62.5 mm (2.5 in)
1955
228.1 mm (9.0 in)
1956
114.8 mm (4.5 in)
1957
63.0 mm (2.5 in)
1958
115.6 mm (4.6 in)
1959
136.2 mm (5.4 in)
1960
122.2 mm (4.8 in)
1961
69.6 mm (2.7 in)
1962
68.4 mm (2.7 in)
1963
94.0 mm (3.7 in)
1964
137.0 mm (5.4 in)
1965
64.0 mm (2.5 in)
1966
99.1 mm (3.9 in)
1967
122.9 mm (4.8 in)
1968
78.8 mm (3.1 in)
1969
101.1 mm (4.0 in)
1970
81.3 mm (3.2 in)
1971
256.5 mm (10.1 in)
1972
255.5 mm (10.1 in)
1973
95.8 mm (3.8 in)
1974
88.4 mm (3.5 in)
1975
250.9 mm (9.9 in)
1976
129.3 mm (5.1 in)
1977
80.9 mm (3.2 in)
1978
70.4 mm (2.8 in)
1979
125.2 mm (4.9 in)
1980
62.0 mm (2.4 in)
1981
98.1 mm (3.9 in)
1982
102.4 mm (4.0 in)
1983
71.9 mm (2.8 in)
1984
112.0 mm (4.4 in)
1985
111.3 mm (4.4 in)
1986
118.6 mm (4.7 in)
1987
173.7 mm (6.8 in)
1988
86.0 mm (3.4 in)
1989
187.7 mm (7.4 in)
1990
80.3 mm (3.2 in)
1991
73.2 mm (2.9 in)
1992
87.8 mm (3.5 in)
1993
84.3 mm (3.3 in)
1994
74.1 mm (2.9 in)
1995
76.7 mm (3.0 in)
1996
108.7 mm (4.3 in)
1997
65.8 mm (2.6 in)
1998
85.1 mm (3.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at La Plata 1 W, 1894 to 1998. The record is 41 days in 1895, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at La Plata 1 W by year
Year
Longest dry spell (CDD)
1894
9 days
1895
41 days
1896
n/a
1910
17 days
1911
30 days
1919
n/a
1920
27 days
1921
24 days
1922
24 days
1923
24 days
1924
30 days
1925
15 days
1926
15 days
1927
14 days
1928
18 days
1929
18 days
1930
22 days
1931
19 days
1932
16 days
1933
12 days
1934
19 days
1935
17 days
1936
18 days
1937
19 days
1938
15 days
1939
18 days
1940
9 days
1941
17 days
1942
22 days
1943
17 days
1944
23 days
1945
17 days
1946
20 days
1947
21 days
1948
12 days
1949
22 days
1950
15 days
1951
12 days
1952
20 days
1953
18 days
1954
17 days
1955
14 days
1956
17 days
1957
19 days
1958
17 days
1959
27 days
1960
14 days
1961
15 days
1962
13 days
1963
32 days
1964
31 days
1965
20 days
1966
26 days
1967
18 days
1968
26 days
1969
19 days
1970
17 days
1971
19 days
1972
11 days
1973
26 days
1974
17 days
1975
13 days
1976
21 days
1977
38 days
1978
16 days
1979
12 days
1980
18 days
1981
17 days
1982
32 days
1983
18 days
1984
14 days
1985
23 days
1986
34 days
1987
15 days
1988
16 days
1989
21 days
1990
20 days
1991
23 days
1992
13 days
1993
20 days
1994
8 days
1995
11 days
1996
13 days
1997
20 days
1998
30 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
67 years with a frost
Across 67 years with a frost, the median last spring frost at La Plata 1 W falls on 17 April and the median first autumn frost on 21 October, which leaves a median of 187 days between them.
In 1962 to 1997 the median growing season was 189 days. That is 4 days more than in 1895 to 1954.
Fitted over all years, the growing season changes by +1.1 days per decade at this station.
Frost dates and growing season at La Plata 1 W
Measure
Median, all years
Earliest period (1895 to 1954)
Recent period (1962 to 1997)
Recent against earliest
Fitted trend
Last spring frost
17 April
17 April
18 April
1 day later
0.0 days per decade
First autumn frost
21 October
20 October
24 October
4 days later
+1.1 days per decade
Growing days
187 days
185 days
189 days
4 days more
+1.1 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
73 years, 1895 to 1997
A day with at least 66.2 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 239.9 mm (9.4 in) of rain is expected about once in 100 years.
Rainfall return levels at La Plata 1 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
66.2 mm (2.6 in)
5 years
92.1 mm (3.6 in)
10 years
115.4 mm (4.5 in)
25 years
154.5 mm (6.1 in)
50 years
192.5 mm (7.6 in)
100 years
239.9 mm (9.4 in)
Longer than the 73 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, 73 years of values from 1895 to 1997.
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: 248.9 mm (9.8 in) in 1971; 190.2 mm (7.5 in) in 1972; 150.4 mm (5.9 in) in 1935.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of La Plata 1 W, at 1979. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1979 ran 0.2 C (0.4 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at La Plata 1 W, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1979
-0.2
-0.4
possible
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 La Plata 1 W standing records by year: CSV or JSON. Field meanings are on the data page.
Data for La Plata 1 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.