Record envelope, standing records and threshold days for Lewes (USC00075320), Delaware, United States, with 82 years of record.
Key Facts for Lewes
Lewes (USC00075320) is a weather station in Delaware, United States at 38.78 latitude and -75.16 longitude, 3 m (10 ft) above sea level.
The station reports from 1945 to 2026, 82 years of record.
1,464 records set at Lewes still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lewes set a daily record high minimum temperature of 25.6 C (78.1 F) on 7 August 2026.
About the Station
Location: Delaware, United States, 38.78 latitude, -75.16 longitude.
Elevation: 3 m (10 ft).
Period of record: 1945 to 2026, 82 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
14 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 Lewes. The lines show the 2026 daily maximum and minimum. 14 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Lewes, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-23.9 C (-11.0 F)
18.3 C (64.9 F)
-11.1 C (12.0 F)
Feb
30.0 C (86.0 F)
-17.8 C (0.0 F)
13.9 C (57.0 F)
-12.2 C (10.0 F)
Mar
31.7 C (89.1 F)
-12.8 C (9.0 F)
30.0 C (86.0 F)
-2.8 C (27.0 F)
Apr
33.3 C (91.9 F)
-7.8 C (18.0 F)
32.2 C (90.0 F)
0.0 C (32.0 F)
May
36.1 C (97.0 F)
-2.8 C (27.0 F)
35.0 C (95.0 F)
6.1 C (43.0 F)
Jun
38.9 C (102.0 F)
3.9 C (39.0 F)
36.7 C (98.1 F)
10.0 C (50.0 F)
Jul
38.3 C (100.9 F)
8.3 C (46.9 F)
38.3 C (100.9 F)
16.1 C (61.0 F)
Aug
38.3 C (100.9 F)
8.3 C (46.9 F)
33.3 C (91.9 F)
17.2 C (63.0 F)
Sep
36.7 C (98.1 F)
2.8 C (37.0 F)
26.1 C (79.0 F)
18.3 C (64.9 F)
Oct
33.3 C (91.9 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-8.9 C (16.0 F)
n/a
n/a
Dec
25.0 C (77.0 F)
-17.8 C (0.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lewes still stand. 1950 holds the most, with 42.
Standing records at Lewes by the year they were set
Year set
Standing records
1945
32
1946
28
1947
33
1948
19
1949
28
1950
42
1951
25
1952
14
1953
26
1954
25
1955
15
1956
27
1957
25
1958
24
1959
30
1960
24
1961
21
1962
20
1963
24
1964
35
1965
28
1966
17
1967
34
1968
11
1969
13
1970
25
1971
18
1972
21
1973
11
1974
22
1975
10
1976
25
1977
17
1978
15
1979
37
1980
5
1981
6
1982
19
1983
23
1984
35
1985
24
1986
28
1987
7
1988
20
1989
25
1990
32
1991
29
1992
13
1993
13
1994
13
1995
17
1996
20
1997
33
1998
23
1999
18
2000
20
2001
16
2002
23
2003
10
2004
13
2005
15
2006
18
2007
19
2008
20
2009
14
2011
2
2019
1
2020
11
2021
7
2022
14
2023
3
2024
4
2025
10
2026
20
All-Time Record Progression
8 new records
8 all-time records were set at Lewes between 19 February 1979 and 29 June 2001. Each dot is a new record.
When Lewes set new all-time records
Date
Kind
Detail
1979-02-19
Record snow depth
Record snow depth 43.2 cm (17.0 in)
1982-01-17
Record low minimum temperature
Record low minimum temperature -23.9 C (-11.0 F)
1983-09-12
Record high minimum temperature
Record high minimum temperature 28.9 C (84.0 F)
1985-01-21
Record low maximum temperature
Record low maximum temperature -11.1 C (12.0 F)
1987-01-26
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
1995-07-15
Record high maximum temperature
Record high maximum temperature 38.3 C (100.9 F)
1997-06-21
Record high maximum temperature
Record high maximum temperature 38.9 C (102.0 F)
2001-06-29
Record high minimum temperature
Record high minimum temperature 30.6 C (87.1 F)
Wettest Day of Each Month
Aug: 177.3 mm (7.0 in)
The wettest day on record for each calendar month at Lewes. The most was 177.3 mm (7.0 in) on 14 August 1953.
Record daily precipitation for each month at Lewes
Month
Record daily precipitation (mm)
Date
Jan
86.6 mm (3.4 in)
28 January 1998
Feb
53.6 mm (2.1 in)
15 February 1953
Mar
86.9 mm (3.4 in)
6 March 1979
Apr
95.8 mm (3.8 in)
13 April 2004
May
102.6 mm (4.0 in)
30 May 1948
Jun
127.0 mm (5.0 in)
25 June 2006
Jul
131.6 mm (5.2 in)
10 July 2020
Aug
177.3 mm (7.0 in)
14 August 1953
Sep
129.5 mm (5.1 in)
1 September 2002
Oct
87.9 mm (3.5 in)
31 October 1956
Nov
97.3 mm (3.8 in)
25 November 1950
Dec
91.7 mm (3.6 in)
18 December 2023
Period of Record Coverage
1945 to 2026
Complete yearUnder 90 percent of days
74 years of record at Lewes, 1945 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1980, 1981, 1983, 1996, 2011, 2019, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 64 complete years at Lewes, 1946 to 2025. Blue stripes are years cooler than the station's own mean of 13.6 C (56.6 F); red stripes are warmer. The coolest year was 1958, at 11.8 C (53.3 F), and the warmest was 1997, at 15.6 C (60.1 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Lewes as warming stripes, 1946 to 2025
Year
Annual mean temperature
Difference from the station mean
1946
13.0 C
-0.61 C
1947
12.4 C
-1.23 C
1948
12.7 C
-0.91 C
1949
14.1 C
+0.45 C
1950
12.8 C
-0.86 C
1951
13.1 C
-0.57 C
1952
13.1 C
-0.53 C
1953
13.6 C
-0.02 C
1954
13.4 C
-0.28 C
1955
13.1 C
-0.58 C
1956
13.0 C
-0.61 C
1957
13.6 C
-0.09 C
1958
11.8 C
-1.83 C
1959
13.7 C
+0.09 C
1960
12.6 C
-1.09 C
1961
12.8 C
-0.83 C
1962
12.5 C
-1.16 C
1963
12.4 C
-1.23 C
1964
12.8 C
-0.82 C
1965
12.4 C
-1.22 C
1966
12.3 C
-1.38 C
1968
12.6 C
-1.03 C
1969
12.4 C
-1.23 C
1970
12.8 C
-0.85 C
1971
13.1 C
-0.52 C
1972
12.7 C
-0.98 C
1974
13.3 C
-0.37 C
1975
13.5 C
-0.17 C
1976
12.7 C
-0.98 C
1977
13.1 C
-0.57 C
1978
12.1 C
-1.53 C
1979
12.7 C
-0.94 C
1982
14.0 C
+0.35 C
1984
13.3 C
-0.32 C
1985
14.6 C
+0.92 C
1986
14.4 C
+0.70 C
1987
13.8 C
+0.11 C
1988
13.4 C
-0.24 C
1989
13.8 C
+0.15 C
1990
15.5 C
+1.87 C
1991
15.3 C
+1.69 C
1992
13.5 C
-0.19 C
1993
13.9 C
+0.24 C
1994
14.3 C
+0.66 C
1995
14.3 C
+0.63 C
1996
14.2 C
+0.50 C
1997
15.6 C
+1.94 C
1999
15.1 C
+1.47 C
2000
14.1 C
+0.46 C
2001
14.7 C
+1.05 C
2002
15.4 C
+1.75 C
2003
13.7 C
+0.01 C
2004
14.4 C
+0.76 C
2005
14.3 C
+0.63 C
2006
15.4 C
+1.78 C
2007
14.8 C
+1.14 C
2008
14.9 C
+1.23 C
2009
14.3 C
+0.65 C
2020
14.6 C
+0.92 C
2021
14.5 C
+0.83 C
2022
13.9 C
+0.27 C
2023
14.7 C
+1.06 C
2024
14.7 C
+1.07 C
2025
13.7 C
+0.09 C
The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1946 to 2025. In Fahrenheit: 0.5 F (0.4 to 0.7) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lewes
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.2 to 0.4) per decade
0.5 F (0.4 to 0.7) per decade
1946 to 2025
64
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1946 to 2025
64
Rise
Mean daily minimum
0.4 C (0.3 to 0.5) per decade
0.7 F (0.6 to 0.9) per decade
1946 to 2025
64
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
1945 to 2026
Yearly extremes at Lewes: 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)
1997
35.9 C (96.5 F)
74
Coldest night (TNn)
-23.9 C (-11.0 F)
1982
-12.5 C (9.5 F)
74
Wettest day (Rx1day)
177.3 mm (7.0 in)
1953
74.3 mm (2.9 in)
74
Wettest five days (Rx5day)
235.4 mm (9.3 in)
1958
109.3 mm (4.3 in)
74
Longest dry spell (CDD)
42 days
2024
18 days
74
Hottest day (TXx)
The hottest day of the year at Lewes, 1945 to 2026. The record is 38.9 C (102.0 F) in 1997, marked on the chart; the median year is 35.9 C (96.5 F).
Hottest day (TXx) at Lewes by year
Year
Hottest day (TXx)
1945
36.7 C (98.1 F)
1946
33.3 C (91.9 F)
1947
35.0 C (95.0 F)
1948
36.1 C (97.0 F)
1949
36.7 C (98.1 F)
1950
34.4 C (93.9 F)
1951
34.4 C (93.9 F)
1952
37.8 C (100.0 F)
1953
37.2 C (99.0 F)
1954
36.7 C (98.1 F)
1955
36.7 C (98.1 F)
1956
36.1 C (97.0 F)
1957
37.8 C (100.0 F)
1958
34.4 C (93.9 F)
1959
35.6 C (96.1 F)
1960
33.9 C (93.0 F)
1961
33.9 C (93.0 F)
1962
35.0 C (95.0 F)
1963
35.6 C (96.1 F)
1964
37.8 C (100.0 F)
1965
35.0 C (95.0 F)
1966
36.7 C (98.1 F)
1967
32.8 C (91.0 F)
1968
37.2 C (99.0 F)
1969
35.6 C (96.1 F)
1970
35.6 C (96.1 F)
1971
33.9 C (93.0 F)
1972
35.6 C (96.1 F)
1973
34.4 C (93.9 F)
1974
34.4 C (93.9 F)
1975
35.0 C (95.0 F)
1976
34.4 C (93.9 F)
1977
37.2 C (99.0 F)
1978
36.7 C (98.1 F)
1979
35.0 C (95.0 F)
1980
31.1 C (88.0 F)
1981
37.2 C (99.0 F)
1982
35.0 C (95.0 F)
1983
36.7 C (98.1 F)
1984
34.4 C (93.9 F)
1985
36.1 C (97.0 F)
1986
37.8 C (100.0 F)
1987
35.6 C (96.1 F)
1988
37.2 C (99.0 F)
1989
34.4 C (93.9 F)
1990
36.1 C (97.0 F)
1991
36.7 C (98.1 F)
1992
36.7 C (98.1 F)
1993
35.6 C (96.1 F)
1994
35.0 C (95.0 F)
1995
38.3 C (100.9 F)
1996
36.1 C (97.0 F)
1997
38.9 C (102.0 F)
1998
36.1 C (97.0 F)
1999
38.3 C (100.9 F)
2000
35.0 C (95.0 F)
2001
36.1 C (97.0 F)
2002
36.7 C (98.1 F)
2003
34.4 C (93.9 F)
2004
34.4 C (93.9 F)
2005
37.2 C (99.0 F)
2006
37.2 C (99.0 F)
2007
37.8 C (100.0 F)
2008
37.8 C (100.0 F)
2009
35.0 C (95.0 F)
2011
38.3 C (100.9 F)
2019
20.0 C (68.0 F)
2020
35.6 C (96.1 F)
2021
35.0 C (95.0 F)
2022
36.1 C (97.0 F)
2023
34.4 C (93.9 F)
2024
35.6 C (96.1 F)
2025
36.1 C (97.0 F)
2026
38.3 C (100.9 F)
Coldest night (TNn)
The coldest night of the year at Lewes, 1945 to 2026. The record is -23.9 C (-11.0 F) in 1982, marked on the chart; the median year is -12.5 C (9.5 F).
Coldest night (TNn) at Lewes by year
Year
Coldest night (TNn)
1945
-13.3 C (8.1 F)
1946
-16.1 C (3.0 F)
1947
-13.9 C (7.0 F)
1948
-12.8 C (9.0 F)
1949
-10.0 C (14.0 F)
1950
-12.8 C (9.0 F)
1951
-12.2 C (10.0 F)
1952
-12.2 C (10.0 F)
1953
-10.0 C (14.0 F)
1954
-11.7 C (10.9 F)
1955
-12.2 C (10.0 F)
1956
-9.4 C (15.1 F)
1957
-22.2 C (-8.0 F)
1958
-17.8 C (0.0 F)
1959
-12.8 C (9.0 F)
1960
-12.8 C (9.0 F)
1961
-20.0 C (-4.0 F)
1962
-14.4 C (6.1 F)
1963
-13.9 C (7.0 F)
1964
-13.3 C (8.1 F)
1965
-21.7 C (-7.1 F)
1966
-15.0 C (5.0 F)
1967
-10.0 C (14.0 F)
1968
-14.4 C (6.1 F)
1969
-11.7 C (10.9 F)
1970
-17.2 C (1.0 F)
1971
-17.8 C (0.0 F)
1972
-13.9 C (7.0 F)
1973
-8.9 C (16.0 F)
1974
-12.8 C (9.0 F)
1975
-10.0 C (14.0 F)
1976
-12.2 C (10.0 F)
1977
-20.0 C (-4.0 F)
1978
-11.7 C (10.9 F)
1979
-17.8 C (0.0 F)
1980
-11.7 C (10.9 F)
1981
-14.4 C (6.1 F)
1982
-23.9 C (-11.0 F)
1983
-16.1 C (3.0 F)
1984
-14.4 C (6.1 F)
1985
-20.0 C (-4.0 F)
1986
-13.3 C (8.1 F)
1987
-13.9 C (7.0 F)
1988
-12.8 C (9.0 F)
1989
-13.9 C (7.0 F)
1990
-8.9 C (16.0 F)
1991
-9.4 C (15.1 F)
1992
-10.6 C (12.9 F)
1993
-11.7 C (10.9 F)
1994
-18.3 C (-0.9 F)
1995
-13.3 C (8.1 F)
1996
-16.1 C (3.0 F)
1997
-12.8 C (9.0 F)
1998
-7.2 C (19.0 F)
1999
-10.0 C (14.0 F)
2000
-11.7 C (10.9 F)
2001
-8.9 C (16.0 F)
2002
-7.8 C (18.0 F)
2003
-13.3 C (8.1 F)
2004
-11.7 C (10.9 F)
2005
-12.2 C (10.0 F)
2006
-8.9 C (16.0 F)
2007
-11.7 C (10.9 F)
2008
-9.4 C (15.1 F)
2009
-13.3 C (8.1 F)
2011
6.1 C (43.0 F)
2019
-7.2 C (19.0 F)
2020
-5.6 C (21.9 F)
2021
-5.6 C (21.9 F)
2022
-12.2 C (10.0 F)
2023
-9.4 C (15.1 F)
2024
-8.3 C (17.1 F)
2025
-10.6 C (12.9 F)
2026
-12.2 C (10.0 F)
Wettest day (Rx1day)
The wettest day of the year at Lewes, 1945 to 2026. The record is 177.3 mm (7.0 in) in 1953, marked on the chart; the median year is 74.3 mm (2.9 in).
Wettest day (Rx1day) at Lewes by year
Year
Wettest day (Rx1day)
1945
70.1 mm (2.8 in)
1946
67.3 mm (2.6 in)
1947
41.4 mm (1.6 in)
1948
102.6 mm (4.0 in)
1949
49.3 mm (1.9 in)
1950
97.3 mm (3.8 in)
1951
45.2 mm (1.8 in)
1952
75.2 mm (3.0 in)
1953
177.3 mm (7.0 in)
1954
90.7 mm (3.6 in)
1955
81.3 mm (3.2 in)
1956
102.9 mm (4.1 in)
1957
55.6 mm (2.2 in)
1958
102.6 mm (4.0 in)
1959
79.5 mm (3.1 in)
1960
119.9 mm (4.7 in)
1961
63.5 mm (2.5 in)
1962
75.7 mm (3.0 in)
1963
74.9 mm (2.9 in)
1964
74.9 mm (2.9 in)
1965
61.5 mm (2.4 in)
1966
56.4 mm (2.2 in)
1967
118.1 mm (4.6 in)
1968
44.5 mm (1.8 in)
1969
64.0 mm (2.5 in)
1970
57.7 mm (2.3 in)
1971
73.7 mm (2.9 in)
1972
62.2 mm (2.4 in)
1973
68.1 mm (2.7 in)
1974
60.5 mm (2.4 in)
1975
79.5 mm (3.1 in)
1976
101.1 mm (4.0 in)
1977
65.5 mm (2.6 in)
1978
56.4 mm (2.2 in)
1979
86.9 mm (3.4 in)
1980
30.5 mm (1.2 in)
1981
79.0 mm (3.1 in)
1982
50.8 mm (2.0 in)
1983
72.4 mm (2.9 in)
1984
52.1 mm (2.1 in)
1985
160.0 mm (6.3 in)
1986
50.8 mm (2.0 in)
1987
76.2 mm (3.0 in)
1988
63.2 mm (2.5 in)
1989
94.7 mm (3.7 in)
1990
82.8 mm (3.3 in)
1991
59.4 mm (2.3 in)
1992
89.7 mm (3.5 in)
1993
69.3 mm (2.7 in)
1994
50.0 mm (2.0 in)
1995
89.4 mm (3.5 in)
1996
79.0 mm (3.1 in)
1997
69.1 mm (2.7 in)
1998
86.6 mm (3.4 in)
1999
95.0 mm (3.7 in)
2000
105.2 mm (4.1 in)
2001
57.7 mm (2.3 in)
2002
129.5 mm (5.1 in)
2003
72.4 mm (2.9 in)
2004
95.8 mm (3.8 in)
2005
94.2 mm (3.7 in)
2006
127.0 mm (5.0 in)
2007
83.8 mm (3.3 in)
2008
70.9 mm (2.8 in)
2009
82.0 mm (3.2 in)
2011
22.9 mm (0.9 in)
2019
28.7 mm (1.1 in)
2020
131.6 mm (5.2 in)
2021
63.0 mm (2.5 in)
2022
58.2 mm (2.3 in)
2023
91.7 mm (3.6 in)
2024
87.6 mm (3.4 in)
2025
55.6 mm (2.2 in)
2026
64.5 mm (2.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lewes, 1945 to 2026. The record is 235.4 mm (9.3 in) in 1958, marked on the chart; the median year is 109.3 mm (4.3 in).
Wettest five days (Rx5day) at Lewes by year
Year
Wettest five days (Rx5day)
1945
174.2 mm (6.9 in)
1946
133.9 mm (5.3 in)
1947
68.6 mm (2.7 in)
1948
162.8 mm (6.4 in)
1949
124.0 mm (4.9 in)
1950
111.3 mm (4.4 in)
1951
76.8 mm (3.0 in)
1952
112.0 mm (4.4 in)
1953
233.2 mm (9.2 in)
1954
103.9 mm (4.1 in)
1955
145.8 mm (5.7 in)
1956
115.1 mm (4.5 in)
1957
113.5 mm (4.5 in)
1958
235.4 mm (9.3 in)
1959
136.9 mm (5.4 in)
1960
154.2 mm (6.1 in)
1961
83.8 mm (3.3 in)
1962
82.6 mm (3.3 in)
1963
96.3 mm (3.8 in)
1964
99.0 mm (3.9 in)
1965
80.5 mm (3.2 in)
1966
78.5 mm (3.1 in)
1967
196.6 mm (7.7 in)
1968
60.0 mm (2.4 in)
1969
89.4 mm (3.5 in)
1970
96.1 mm (3.8 in)
1971
97.3 mm (3.8 in)
1972
67.3 mm (2.6 in)
1973
135.4 mm (5.3 in)
1974
89.9 mm (3.5 in)
1975
133.9 mm (5.3 in)
1976
112.5 mm (4.4 in)
1977
107.0 mm (4.2 in)
1978
78.5 mm (3.1 in)
1979
101.3 mm (4.0 in)
1980
59.4 mm (2.3 in)
1981
134.7 mm (5.3 in)
1982
87.4 mm (3.4 in)
1983
123.0 mm (4.8 in)
1984
157.5 mm (6.2 in)
1985
193.7 mm (7.6 in)
1986
66.9 mm (2.6 in)
1987
95.4 mm (3.8 in)
1988
87.8 mm (3.5 in)
1989
126.4 mm (5.0 in)
1990
93.5 mm (3.7 in)
1991
101.2 mm (4.0 in)
1992
233.5 mm (9.2 in)
1993
87.9 mm (3.5 in)
1994
91.2 mm (3.6 in)
1995
89.9 mm (3.5 in)
1996
107.2 mm (4.2 in)
1997
96.0 mm (3.8 in)
1998
98.5 mm (3.9 in)
1999
112.8 mm (4.4 in)
2000
118.2 mm (4.7 in)
2001
136.6 mm (5.4 in)
2002
191.2 mm (7.5 in)
2003
82.6 mm (3.3 in)
2004
131.9 mm (5.2 in)
2005
117.6 mm (4.6 in)
2006
149.4 mm (5.9 in)
2007
105.7 mm (4.2 in)
2008
115.4 mm (4.5 in)
2009
144.0 mm (5.7 in)
2011
23.9 mm (0.9 in)
2019
57.7 mm (2.3 in)
2020
139.0 mm (5.5 in)
2021
76.0 mm (3.0 in)
2022
148.8 mm (5.9 in)
2023
116.6 mm (4.6 in)
2024
126.5 mm (5.0 in)
2025
99.3 mm (3.9 in)
2026
128.3 mm (5.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lewes, 1945 to 2026. The record is 42 days in 2024, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Lewes by year
Year
Longest dry spell (CDD)
1945
13 days
1946
14 days
1947
12 days
1948
18 days
1949
11 days
1950
12 days
1951
13 days
1952
23 days
1953
18 days
1954
20 days
1955
26 days
1956
14 days
1957
16 days
1958
14 days
1959
15 days
1960
13 days
1961
15 days
1962
19 days
1963
20 days
1964
29 days
1965
22 days
1966
13 days
1967
17 days
1968
22 days
1969
16 days
1970
17 days
1971
16 days
1972
16 days
1973
26 days
1974
17 days
1975
14 days
1976
20 days
1977
18 days
1978
18 days
1979
11 days
1980
16 days
1981
14 days
1982
27 days
1983
21 days
1984
26 days
1985
17 days
1986
27 days
1987
15 days
1988
22 days
1989
23 days
1990
17 days
1991
23 days
1992
17 days
1993
17 days
1994
20 days
1995
26 days
1996
14 days
1997
15 days
1998
20 days
1999
21 days
2000
33 days
2001
38 days
2002
18 days
2003
13 days
2004
13 days
2005
25 days
2006
23 days
2007
17 days
2008
20 days
2009
20 days
2011
5 days
2019
11 days
2020
18 days
2021
17 days
2022
18 days
2023
10 days
2024
42 days
2025
18 days
2026
31 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
64 years with a frost
Across 64 years with a frost, the median last spring frost at Lewes falls on 10 April and the median first autumn frost on 6 November, which leaves a median of 214 days between them.
In 1985 to 2025 the median growing season was 227 days. That is 34 days more than in 1946 to 1977.
Fitted over all years, the growing season changes by +7.1 days per decade at this station.
Frost dates and growing season at Lewes
Measure
Median, all years
Earliest period (1946 to 1977)
Recent period (1985 to 2025)
Recent against earliest
Fitted trend
Last spring frost
10 April
13 April
31 March
13 days earlier
-3.2 days per decade
First autumn frost
6 November
28 October
15 November
18 days later
+3.9 days per decade
Growing days
214 days
193 days
227 days
34 days more
+7.1 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
70 years, 1945 to 2025
A day with at least 74.5 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 168.6 mm (6.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Lewes: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
74.5 mm (2.9 in)
5 years
97.0 mm (3.8 in)
10 years
113.0 mm (4.4 in)
25 years
134.3 mm (5.3 in)
50 years
151.1 mm (5.9 in)
100 years
168.6 mm (6.6 in)
Longer than the 70 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, 70 years of values from 1945 to 2025.
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: 177.3 mm (7.0 in) in 1953; 160.0 mm (6.3 in) in 1985; 131.6 mm (5.2 in) in 2020.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Lewes, at 1985. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1985 ran 0.5 C (0.9 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Lewes, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1985
+0.5
+0.9
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 Lewes standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lewes 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.