Record envelope, standing records and threshold days for Georgetown 5 SW (USC00073570), Delaware, United States, with 52 years of record.
Key Facts for Georgetown 5 SW
Georgetown 5 SW (USC00073570) is a weather station in Delaware, United States at 38.63 latitude and -75.45 longitude, 14 m (45 ft) above sea level.
The station reports from 1946 to 1997, 52 years of record.
1,464 records set at Georgetown 5 SW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Georgetown 5 SW set a daily record low minimum temperature of 3.9 C (39.0 F) on 29 May 1997.
About the Station
Location: Delaware, United States, 38.63 latitude, -75.45 longitude.
Elevation: 14 m (45 ft).
Period of record: 1946 to 1997, 52 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 Georgetown 5 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 Georgetown 5 SW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
23.9 C (75.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Feb
24.4 C (75.9 F)
-22.2 C (-8.0 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-16.1 C (3.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-6.7 C (19.9 F)
n/a
n/a
May
36.7 C (98.1 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
38.3 C (100.9 F)
1.7 C (35.1 F)
n/a
n/a
Jul
38.9 C (102.0 F)
6.1 C (43.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
5.6 C (42.1 F)
n/a
n/a
Sep
36.7 C (98.1 F)
0.0 C (32.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-6.1 C (21.0 F)
n/a
n/a
Nov
30.0 C (86.0 F)
-10.0 C (14.0 F)
n/a
n/a
Dec
25.0 C (77.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Georgetown 5 SW still stand. 1950 holds the most, with 47.
Standing records at Georgetown 5 SW by the year they were set
Year set
Standing records
1946
12
1947
38
1948
38
1949
35
1950
47
1951
29
1952
32
1953
39
1954
44
1955
24
1956
36
1957
42
1958
29
1959
42
1960
33
1961
25
1962
26
1963
36
1964
40
1965
32
1966
30
1967
32
1968
16
1969
19
1970
26
1971
25
1972
31
1973
26
1974
34
1975
16
1976
42
1977
33
1978
22
1979
43
1980
20
1981
13
1982
20
1983
19
1984
25
1985
28
1986
20
1987
21
1988
29
1989
44
1990
22
1991
25
1992
19
1993
17
1994
15
1995
16
1996
31
1997
6
All-Time Record Progression
4 new records
4 all-time records were set at Georgetown 5 SW between 18 January 1982 and 20 January 1994. Each dot is a new record.
When Georgetown 5 SW set new all-time records
Date
Kind
Detail
1982-01-18
Record low maximum temperature
Record low maximum temperature -12.2 C (10.0 F)
1985-08-19
Record daily precipitation
Record daily precipitation 151.1 mm (5.9 in)
1987-01-28
Record low minimum temperature
Record low minimum temperature -25.0 C (-13.0 F)
1994-01-20
Record low maximum temperature
Record low maximum temperature -12.8 C (9.0 F)
Wettest Day of Each Month
Aug: 151.1 mm (5.9 in)
The wettest day on record for each calendar month at Georgetown 5 SW. The most was 151.1 mm (5.9 in) on 19 August 1985.
Record daily precipitation for each month at Georgetown 5 SW
Month
Record daily precipitation (mm)
Date
Jan
68.8 mm (2.7 in)
13 January 1948
Feb
59.7 mm (2.4 in)
12 February 1988
Mar
64.5 mm (2.5 in)
12 March 1963
Apr
58.2 mm (2.3 in)
5 April 1984
May
73.4 mm (2.9 in)
26 May 1948
Jun
65.8 mm (2.6 in)
16 June 1948
Jul
88.9 mm (3.5 in)
15 July 1967
Aug
151.1 mm (5.9 in)
19 August 1985
Sep
134.6 mm (5.3 in)
12 September 1960
Oct
77.7 mm (3.1 in)
6 October 1948
Nov
70.4 mm (2.8 in)
13 November 1975
Dec
92.7 mm (3.6 in)
19 December 1977
Period of Record Coverage
1946 to 1997
Complete yearUnder 90 percent of days
52 years of record at Georgetown 5 SW, 1946 to 1997. 2 years have data for under 90 percent of days and are left out of rankings: 1946, 1997.
Cooler than the station meanWarmer than the station mean
One stripe for each of 50 complete years at Georgetown 5 SW, 1947 to 1996. Blue stripes are years cooler than the station's own mean of 12.9 C (55.3 F); red stripes are warmer. The coolest year was 1978, at 11.9 C (53.4 F), and the warmest was 1953, at 14.2 C (57.5 F). The strongest colour marks a difference of 1.3 C (2.3 F).
Annual mean temperature at Georgetown 5 SW as warming stripes, 1947 to 1996
Year
Annual mean temperature
Difference from the station mean
1947
12.9 C
-0.07 C
1948
12.9 C
-0.07 C
1949
14.1 C
+1.17 C
1950
13.1 C
+0.14 C
1951
13.5 C
+0.53 C
1952
13.3 C
+0.40 C
1953
14.2 C
+1.26 C
1954
13.7 C
+0.80 C
1955
13.4 C
+0.50 C
1956
13.5 C
+0.54 C
1957
13.8 C
+0.91 C
1958
12.3 C
-0.62 C
1959
14.2 C
+1.23 C
1960
12.7 C
-0.20 C
1961
13.2 C
+0.28 C
1962
12.5 C
-0.45 C
1963
12.6 C
-0.34 C
1964
13.3 C
+0.37 C
1965
12.9 C
-0.01 C
1966
12.4 C
-0.49 C
1967
12.1 C
-0.78 C
1968
12.7 C
-0.21 C
1969
12.0 C
-0.94 C
1970
12.4 C
-0.50 C
1971
12.7 C
-0.22 C
1972
12.3 C
-0.65 C
1973
13.4 C
+0.44 C
1974
12.8 C
-0.08 C
1975
13.2 C
+0.27 C
1976
12.3 C
-0.64 C
1977
12.8 C
-0.08 C
1978
11.9 C
-1.02 C
1979
12.4 C
-0.48 C
1980
12.5 C
-0.39 C
1981
12.3 C
-0.67 C
1982
12.4 C
-0.49 C
1983
12.9 C
+0.01 C
1984
12.9 C
-0.01 C
1985
13.2 C
+0.26 C
1986
13.1 C
+0.19 C
1987
12.9 C
0.00 C
1988
12.5 C
-0.43 C
1989
12.6 C
-0.36 C
1990
14.0 C
+1.12 C
1991
14.0 C
+1.05 C
1992
12.4 C
-0.55 C
1993
13.1 C
+0.13 C
1994
12.9 C
-0.04 C
1995
12.7 C
-0.19 C
1996
12.3 C
-0.59 C
The annual mean temperature here has fallen by 0.12 C (0.01 to 0.23) per decade over 1947 to 1996. In Fahrenheit: 0.22 F (0.02 to 0.42) per decade. The slope is a straight line fitted to 50 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Georgetown 5 SW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.12 C (-0.23 to -0.01) per decade
-0.22 F (-0.42 to -0.02) per decade
1947 to 1996
50
Fall
Mean daily maximum
-0.2 C (-0.4 to -0.1) per decade
-0.4 F (-0.6 to -0.1) per decade
1947 to 1996
50
Fall
Mean daily minimum
-0.03 C (-0.13 to 0.08) per decade
-0.1 F (-0.2 to 0.1) per decade
1947 to 1996
50
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
1946 to 1997
Yearly extremes at Georgetown 5 SW: 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)
1954
36.1 C (97.0 F)
52
Coldest night (TNn)
-25.0 C (-13.0 F)
1987
-16.1 C (3.0 F)
52
Wettest day (Rx1day)
151.1 mm (5.9 in)
1985
65.5 mm (2.6 in)
52
Wettest five days (Rx5day)
228.3 mm (9.0 in)
1958
106.6 mm (4.2 in)
52
Longest dry spell (CDD)
30 days
1995
18 days
52
Hottest day (TXx)
The hottest day of the year at Georgetown 5 SW, 1946 to 1997. The record is 38.9 C (102.0 F) in 1954, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Georgetown 5 SW by year
Year
Hottest day (TXx)
1946
30.0 C (86.0 F)
1947
35.0 C (95.0 F)
1948
37.2 C (99.0 F)
1949
37.2 C (99.0 F)
1950
35.0 C (95.0 F)
1951
35.6 C (96.1 F)
1952
38.3 C (100.9 F)
1953
38.3 C (100.9 F)
1954
38.9 C (102.0 F)
1955
37.2 C (99.0 F)
1956
36.1 C (97.0 F)
1957
38.3 C (100.9 F)
1958
35.6 C (96.1 F)
1959
38.3 C (100.9 F)
1960
34.4 C (93.9 F)
1961
35.6 C (96.1 F)
1962
35.6 C (96.1 F)
1963
36.1 C (97.0 F)
1964
36.7 C (98.1 F)
1965
35.0 C (95.0 F)
1966
37.8 C (100.0 F)
1967
33.3 C (91.9 F)
1968
36.7 C (98.1 F)
1969
37.2 C (99.0 F)
1970
35.0 C (95.0 F)
1971
35.0 C (95.0 F)
1972
35.0 C (95.0 F)
1973
35.0 C (95.0 F)
1974
35.6 C (96.1 F)
1975
35.6 C (96.1 F)
1976
34.4 C (93.9 F)
1977
38.3 C (100.9 F)
1978
36.1 C (97.0 F)
1979
34.4 C (93.9 F)
1980
36.7 C (98.1 F)
1981
35.0 C (95.0 F)
1982
36.7 C (98.1 F)
1983
36.1 C (97.0 F)
1984
34.4 C (93.9 F)
1985
35.0 C (95.0 F)
1986
36.1 C (97.0 F)
1987
37.8 C (100.0 F)
1988
37.8 C (100.0 F)
1989
35.0 C (95.0 F)
1990
37.2 C (99.0 F)
1991
37.2 C (99.0 F)
1992
36.1 C (97.0 F)
1993
38.3 C (100.9 F)
1994
37.2 C (99.0 F)
1995
38.3 C (100.9 F)
1996
34.4 C (93.9 F)
1997
32.2 C (90.0 F)
Coldest night (TNn)
The coldest night of the year at Georgetown 5 SW, 1946 to 1997. The record is -25.0 C (-13.0 F) in 1987, marked on the chart; the median year is -16.1 C (3.0 F).
Coldest night (TNn) at Georgetown 5 SW by year
Year
Coldest night (TNn)
1946
-12.8 C (9.0 F)
1947
-13.9 C (7.0 F)
1948
-18.3 C (-0.9 F)
1949
-11.1 C (12.0 F)
1950
-13.3 C (8.1 F)
1951
-15.0 C (5.0 F)
1952
-12.8 C (9.0 F)
1953
-12.2 C (10.0 F)
1954
-13.9 C (7.0 F)
1955
-14.4 C (6.1 F)
1956
-11.1 C (12.0 F)
1957
-24.4 C (-11.9 F)
1958
-21.7 C (-7.1 F)
1959
-13.9 C (7.0 F)
1960
-16.1 C (3.0 F)
1961
-17.2 C (1.0 F)
1962
-16.1 C (3.0 F)
1963
-17.2 C (1.0 F)
1964
-15.6 C (3.9 F)
1965
-23.3 C (-9.9 F)
1966
-21.1 C (-6.0 F)
1967
-18.3 C (-0.9 F)
1968
-16.1 C (3.0 F)
1969
-14.4 C (6.1 F)
1970
-18.9 C (-2.0 F)
1971
-17.8 C (0.0 F)
1972
-15.0 C (5.0 F)
1973
-12.8 C (9.0 F)
1974
-16.1 C (3.0 F)
1975
-10.6 C (12.9 F)
1976
-14.4 C (6.1 F)
1977
-20.0 C (-4.0 F)
1978
-16.1 C (3.0 F)
1979
-22.2 C (-8.0 F)
1980
-16.7 C (1.9 F)
1981
-17.8 C (0.0 F)
1982
-20.6 C (-5.1 F)
1983
-16.1 C (3.0 F)
1984
-18.3 C (-0.9 F)
1985
-20.6 C (-5.1 F)
1986
-16.7 C (1.9 F)
1987
-25.0 C (-13.0 F)
1988
-18.9 C (-2.0 F)
1989
-16.7 C (1.9 F)
1990
-11.1 C (12.0 F)
1991
-12.8 C (9.0 F)
1992
-14.4 C (6.1 F)
1993
-11.7 C (10.9 F)
1994
-19.4 C (-2.9 F)
1995
-15.6 C (3.9 F)
1996
-22.2 C (-8.0 F)
1997
-16.1 C (3.0 F)
Wettest day (Rx1day)
The wettest day of the year at Georgetown 5 SW, 1946 to 1997. The record is 151.1 mm (5.9 in) in 1985, marked on the chart; the median year is 65.5 mm (2.6 in).
Wettest day (Rx1day) at Georgetown 5 SW by year
Year
Wettest day (Rx1day)
1946
35.3 mm (1.4 in)
1947
58.9 mm (2.3 in)
1948
77.7 mm (3.1 in)
1949
54.1 mm (2.1 in)
1950
60.5 mm (2.4 in)
1951
56.4 mm (2.2 in)
1952
52.3 mm (2.1 in)
1953
148.8 mm (5.9 in)
1954
82.6 mm (3.3 in)
1955
102.6 mm (4.0 in)
1956
77.0 mm (3.0 in)
1957
66.5 mm (2.6 in)
1958
108.0 mm (4.3 in)
1959
79.0 mm (3.1 in)
1960
134.6 mm (5.3 in)
1961
55.4 mm (2.2 in)
1962
55.1 mm (2.2 in)
1963
64.5 mm (2.5 in)
1964
80.0 mm (3.1 in)
1965
86.4 mm (3.4 in)
1966
76.2 mm (3.0 in)
1967
90.9 mm (3.6 in)
1968
40.6 mm (1.6 in)
1969
61.0 mm (2.4 in)
1970
50.8 mm (2.0 in)
1971
60.5 mm (2.4 in)
1972
62.7 mm (2.5 in)
1973
127.8 mm (5.0 in)
1974
69.9 mm (2.8 in)
1975
70.4 mm (2.8 in)
1976
70.4 mm (2.8 in)
1977
102.6 mm (4.0 in)
1978
118.9 mm (4.7 in)
1979
59.4 mm (2.3 in)
1980
71.4 mm (2.8 in)
1981
57.4 mm (2.3 in)
1982
73.7 mm (2.9 in)
1983
94.0 mm (3.7 in)
1984
58.2 mm (2.3 in)
1985
151.1 mm (5.9 in)
1986
52.1 mm (2.1 in)
1987
50.8 mm (2.0 in)
1988
61.2 mm (2.4 in)
1989
85.1 mm (3.4 in)
1990
62.2 mm (2.4 in)
1991
42.2 mm (1.7 in)
1992
67.3 mm (2.6 in)
1993
59.2 mm (2.3 in)
1994
59.2 mm (2.3 in)
1995
47.2 mm (1.9 in)
1996
87.9 mm (3.5 in)
1997
31.5 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Georgetown 5 SW, 1946 to 1997. The record is 228.3 mm (9.0 in) in 1958, marked on the chart; the median year is 106.6 mm (4.2 in).
Wettest five days (Rx5day) at Georgetown 5 SW by year
Year
Wettest five days (Rx5day)
1946
62.5 mm (2.5 in)
1947
72.0 mm (2.8 in)
1948
179.5 mm (7.1 in)
1949
136.5 mm (5.4 in)
1950
81.3 mm (3.2 in)
1951
109.2 mm (4.3 in)
1952
117.3 mm (4.6 in)
1953
201.4 mm (7.9 in)
1954
119.4 mm (4.7 in)
1955
173.6 mm (6.8 in)
1956
112.1 mm (4.4 in)
1957
83.2 mm (3.3 in)
1958
228.3 mm (9.0 in)
1959
149.9 mm (5.9 in)
1960
163.3 mm (6.4 in)
1961
85.1 mm (3.4 in)
1962
96.3 mm (3.8 in)
1963
87.7 mm (3.5 in)
1964
114.8 mm (4.5 in)
1965
96.3 mm (3.8 in)
1966
87.6 mm (3.4 in)
1967
161.2 mm (6.3 in)
1968
62.6 mm (2.5 in)
1969
120.6 mm (4.7 in)
1970
95.0 mm (3.7 in)
1971
89.4 mm (3.5 in)
1972
107.1 mm (4.2 in)
1973
140.8 mm (5.5 in)
1974
105.9 mm (4.2 in)
1975
126.3 mm (5.0 in)
1976
96.7 mm (3.8 in)
1977
132.8 mm (5.2 in)
1978
132.4 mm (5.2 in)
1979
107.1 mm (4.2 in)
1980
90.0 mm (3.5 in)
1981
86.6 mm (3.4 in)
1982
80.0 mm (3.1 in)
1983
123.2 mm (4.9 in)
1984
112.7 mm (4.4 in)
1985
170.7 mm (6.7 in)
1986
79.8 mm (3.1 in)
1987
78.5 mm (3.1 in)
1988
77.0 mm (3.0 in)
1989
191.1 mm (7.5 in)
1990
107.4 mm (4.2 in)
1991
106.1 mm (4.2 in)
1992
129.6 mm (5.1 in)
1993
79.5 mm (3.1 in)
1994
106.1 mm (4.2 in)
1995
81.5 mm (3.2 in)
1996
105.4 mm (4.1 in)
1997
45.0 mm (1.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Georgetown 5 SW, 1946 to 1997. The record is 30 days in 1995, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Georgetown 5 SW by year
Year
Longest dry spell (CDD)
1946
14 days
1947
13 days
1948
18 days
1949
22 days
1950
15 days
1951
13 days
1952
23 days
1953
19 days
1954
25 days
1955
16 days
1956
16 days
1957
25 days
1958
18 days
1959
15 days
1960
18 days
1961
15 days
1962
18 days
1963
25 days
1964
25 days
1965
29 days
1966
20 days
1967
20 days
1968
29 days
1969
24 days
1970
17 days
1971
20 days
1972
13 days
1973
25 days
1974
21 days
1975
13 days
1976
20 days
1977
17 days
1978
21 days
1979
11 days
1980
15 days
1981
20 days
1982
17 days
1983
14 days
1984
22 days
1985
23 days
1986
20 days
1987
15 days
1988
19 days
1989
23 days
1990
17 days
1991
16 days
1992
20 days
1993
17 days
1994
18 days
1995
30 days
1996
13 days
1997
10 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
50 years with a frost
Across 50 years with a frost, the median last spring frost at Georgetown 5 SW falls on 21 April and the median first autumn frost on 18 October, which leaves a median of 180 days between them.
Fitted over all years, the growing season changes by +3.8 days per decade at this station.
Frost dates and growing season at Georgetown 5 SW
Measure
Median, all years
Earliest period
Recent period (1967 to 1996)
Recent against earliest
Fitted trend
Last spring frost
21 April
n/a
18 April
n/a
-2.3 days per decade
First autumn frost
18 October
n/a
19 October
n/a
+1.5 days per decade
Growing days
180 days
n/a
184 days
n/a
+3.8 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
50 years, 1947 to 1996
A day with at least 67.8 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 182.2 mm (7.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Georgetown 5 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
67.8 mm (2.7 in)
5 years
89.3 mm (3.5 in)
10 years
106.6 mm (4.2 in)
25 years
132.7 mm (5.2 in)
50 years
155.7 mm (6.1 in)
100 years
182.2 mm (7.2 in)
Longer than the 50 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, 50 years of values from 1947 to 1996.
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: 151.1 mm (5.9 in) in 1985; 148.8 mm (5.9 in) in 1953; 134.6 mm (5.3 in) in 1960.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Georgetown 5 SW, at 1954. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1954 ran 0.2 C (0.3 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Georgetown 5 SW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1954
+0.2
+0.3
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 Georgetown 5 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Georgetown 5 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.