Record envelope, standing records and threshold days for Derna (LYE00147751), Libya, with 97 years of record.
Key Facts for Derna
Derna (LYE00147751) is a weather station in Libya at 32.76 latitude and 22.66 longitude, 10 m (33 ft) above sea level.
The station reports from 1928 to 2024, 97 years of record.
1,464 records set at Derna still stand.
Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
Derna set a daily record high maximum temperature of 21.3 C (70.3 F) on 5 January 2024.
About the Station
Location: Libya, 32.76 latitude, 22.66 longitude.
Elevation: 10 m (33 ft).
Period of record: 1928 to 2024, 97 years.
Eligible elements: tmax, tmin.
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 Derna. 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 Derna, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
30.0 C (86.0 F)
0.2 C (32.4 F)
n/a
n/a
Feb
32.5 C (90.5 F)
0.0 C (32.0 F)
n/a
n/a
Mar
36.5 C (97.7 F)
-0.1 C (31.8 F)
n/a
n/a
Apr
40.0 C (104.0 F)
1.0 C (33.8 F)
n/a
n/a
May
41.1 C (106.0 F)
1.0 C (33.8 F)
n/a
n/a
Jun
41.7 C (107.1 F)
3.9 C (39.0 F)
n/a
n/a
Jul
37.0 C (98.6 F)
10.9 C (51.6 F)
n/a
n/a
Aug
36.1 C (97.0 F)
12.0 C (53.6 F)
n/a
n/a
Sep
38.0 C (100.4 F)
10.0 C (50.0 F)
n/a
n/a
Oct
40.4 C (104.7 F)
9.0 C (48.2 F)
n/a
n/a
Nov
37.8 C (100.0 F)
3.6 C (38.5 F)
n/a
n/a
Dec
31.5 C (88.7 F)
0.9 C (33.6 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Derna still stand. 1936 holds the most, with 129.
Standing records at Derna by the year they were set
Year set
Standing records
1928
22
1929
29
1930
78
1931
45
1932
47
1933
53
1934
54
1935
98
1936
129
1952
24
1953
39
1954
13
1955
23
1956
32
1957
22
1958
11
1959
26
1960
19
1961
16
1962
11
1963
28
1973
10
1974
14
1975
11
1976
9
1977
17
1978
26
1979
2
1980
16
1981
25
1982
17
1983
21
1984
13
1985
4
1986
3
1987
6
1988
8
1990
14
1991
14
1992
19
1993
13
1994
3
1995
19
1996
16
1997
15
1998
28
1999
15
2000
8
2001
11
2002
9
2003
7
2004
11
2005
15
2006
13
2007
15
2008
28
2009
29
2010
37
2011
2
2021
49
2022
27
2023
25
2024
1
All-Time Record Progression
1 new records
1 all-time records were set at Derna between 4 August 2021 and 4 August 2021. Each dot is a new record.
When Derna set new all-time records
Date
Kind
Detail
2021-08-04
Record high minimum temperature
Record high minimum temperature 29.8 C (85.6 F)
Wettest Day of Each Month
Jun: 199.9 mm (7.9 in)
The wettest day on record for each calendar month at Derna. The most was 199.9 mm (7.9 in) on 1 June 1992.
Record daily precipitation for each month at Derna
Month
Record daily precipitation (mm)
Date
Jan
153.9 mm (6.1 in)
6 January 1993
Feb
56.9 mm (2.2 in)
19 February 1983
Mar
43.9 mm (1.7 in)
28 March 1957
Apr
70.1 mm (2.8 in)
19 April 1993
May
15.0 mm (0.6 in)
6 May 2023
Jun
199.9 mm (7.9 in)
1 June 1992
Jul
3.0 mm (0.12 in)
1 July 1957
Aug
0.3 mm (0.01 in)
31 August 1991
Sep
13.0 mm (0.5 in)
28 September 2000
Oct
65.4 mm (2.6 in)
28 October 1954
Nov
79.5 mm (3.1 in)
26 November 1953
Dec
104.9 mm (4.1 in)
19 December 2005
Period of Record Coverage
1928 to 2024
Complete yearUnder 90 percent of days
65 years of record at Derna, 1928 to 2024. 45 years have data for under 90 percent of days and are left out of rankings: 1930, 1973, 1974, 1975, 1976, 1977, 1978, 1979 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 16 complete years at Derna, 1928 to 1963. Blue stripes are years cooler than the station's own mean of 19.2 C (66.6 F); red stripes are warmer. The coolest year was 1936, at 17.0 C (62.6 F), and the warmest was 1955, at 20.7 C (69.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Derna as warming stripes, 1928 to 1963
Year
Annual mean temperature
Difference from the station mean
1928
19.9 C
+0.62 C
1929
19.2 C
-0.02 C
1931
18.9 C
-0.38 C
1932
20.0 C
+0.72 C
1933
18.1 C
-1.12 C
1934
18.1 C
-1.11 C
1935
17.4 C
-1.83 C
1936
17.0 C
-2.21 C
1952
20.0 C
+0.73 C
1953
19.3 C
+0.07 C
1954
19.6 C
+0.37 C
1955
20.7 C
+1.46 C
1956
19.6 C
+0.39 C
1957
19.9 C
+0.63 C
1962
20.0 C
+0.75 C
1963
20.2 C
+0.94 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1928 to 2024
Yearly extremes at Derna: 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)
1954
37.0 C (98.6 F)
65
Coldest night (TNn)
-0.1 C (31.8 F)
1978
5.5 C (41.9 F)
65
Wettest day (Rx1day)
199.9 mm (7.9 in)
1992
30.5 mm (1.2 in)
48
Wettest five days (Rx5day)
199.9 mm (7.9 in)
1992
31.9 mm (1.3 in)
41
Longest dry spell (CDD)
202 days
1955
10 days
48
Hottest day (TXx)
The hottest day of the year at Derna, 1928 to 2024. The record is 41.7 C (107.1 F) in 1954, marked on the chart; the median year is 37.0 C (98.6 F).
Hottest day (TXx) at Derna by year
Year
Hottest day (TXx)
1928
39.9 C (103.8 F)
1929
36.5 C (97.7 F)
1930
40.0 C (104.0 F)
1931
38.8 C (101.8 F)
1932
39.5 C (103.1 F)
1933
35.0 C (95.0 F)
1934
36.5 C (97.7 F)
1935
40.0 C (104.0 F)
1936
40.0 C (104.0 F)
1952
34.4 C (93.9 F)
1953
38.3 C (100.9 F)
1954
41.7 C (107.1 F)
1955
40.0 C (104.0 F)
1956
40.0 C (104.0 F)
1957
38.9 C (102.0 F)
1958
40.0 C (104.0 F)
1959
41.1 C (106.0 F)
1960
38.9 C (102.0 F)
1961
40.0 C (104.0 F)
1962
38.9 C (102.0 F)
1963
37.2 C (99.0 F)
1973
37.0 C (98.6 F)
1974
40.0 C (104.0 F)
1975
35.0 C (95.0 F)
1976
37.0 C (98.6 F)
1977
36.0 C (96.8 F)
1978
36.0 C (96.8 F)
1979
37.0 C (98.6 F)
1980
37.0 C (98.6 F)
1981
36.0 C (96.8 F)
1982
40.4 C (104.7 F)
1983
33.5 C (92.3 F)
1984
38.0 C (100.4 F)
1985
35.7 C (96.3 F)
1986
36.0 C (96.8 F)
1987
38.5 C (101.3 F)
1988
35.0 C (95.0 F)
1989
17.0 C (62.6 F)
1990
41.0 C (105.8 F)
1991
36.0 C (96.8 F)
1992
40.8 C (105.4 F)
1993
36.6 C (97.9 F)
1994
31.3 C (88.3 F)
1995
40.2 C (104.4 F)
1996
36.3 C (97.3 F)
1997
37.0 C (98.6 F)
1998
39.3 C (102.7 F)
1999
37.7 C (99.9 F)
2000
36.0 C (96.8 F)
2001
40.0 C (104.0 F)
2002
37.0 C (98.6 F)
2003
36.5 C (97.7 F)
2004
37.5 C (99.5 F)
2005
37.0 C (98.6 F)
2006
37.5 C (99.5 F)
2007
35.0 C (95.0 F)
2008
36.2 C (97.2 F)
2009
36.7 C (98.1 F)
2010
36.8 C (98.2 F)
2011
22.0 C (71.6 F)
2020
21.1 C (70.0 F)
2021
34.3 C (93.7 F)
2022
38.0 C (100.4 F)
2023
35.0 C (95.0 F)
2024
22.0 C (71.6 F)
Coldest night (TNn)
The coldest night of the year at Derna, 1928 to 2024. The record is -0.1 C (31.8 F) in 1978, marked on the chart; the median year is 5.5 C (41.9 F).
Coldest night (TNn) at Derna by year
Year
Coldest night (TNn)
1928
1.1 C (34.0 F)
1929
5.0 C (41.0 F)
1930
6.2 C (43.2 F)
1931
1.5 C (34.7 F)
1932
1.0 C (33.8 F)
1933
1.4 C (34.5 F)
1934
0.0 C (32.0 F)
1935
1.0 C (33.8 F)
1936
0.2 C (32.4 F)
1952
5.6 C (42.1 F)
1953
6.1 C (43.0 F)
1954
6.1 C (43.0 F)
1955
5.0 C (41.0 F)
1956
5.0 C (41.0 F)
1957
6.7 C (44.1 F)
1958
7.2 C (45.0 F)
1959
5.0 C (41.0 F)
1960
7.2 C (45.0 F)
1961
7.2 C (45.0 F)
1962
7.2 C (45.0 F)
1963
5.0 C (41.0 F)
1973
5.0 C (41.0 F)
1974
5.0 C (41.0 F)
1975
1.0 C (33.8 F)
1976
1.0 C (33.8 F)
1977
3.0 C (37.4 F)
1978
-0.1 C (31.8 F)
1979
10.0 C (50.0 F)
1980
2.0 C (35.6 F)
1981
1.0 C (33.8 F)
1982
8.8 C (47.8 F)
1983
1.0 C (33.8 F)
1984
1.0 C (33.8 F)
1985
1.2 C (34.2 F)
1986
1.0 C (33.8 F)
1987
3.9 C (39.0 F)
1988
7.0 C (44.6 F)
1989
7.0 C (44.6 F)
1990
3.0 C (37.4 F)
1991
5.0 C (41.0 F)
1992
3.5 C (38.3 F)
1993
6.2 C (43.2 F)
1994
10.0 C (50.0 F)
1995
5.9 C (42.6 F)
1996
0.9 C (33.6 F)
1997
9.0 C (48.2 F)
1998
2.9 C (37.2 F)
1999
5.5 C (41.9 F)
2000
7.3 C (45.1 F)
2001
9.5 C (49.1 F)
2002
10.5 C (50.9 F)
2003
7.0 C (44.6 F)
2004
7.0 C (44.6 F)
2005
7.5 C (45.5 F)
2006
6.0 C (42.8 F)
2007
8.0 C (46.4 F)
2008
5.0 C (41.0 F)
2009
8.0 C (46.4 F)
2010
9.3 C (48.7 F)
2011
7.5 C (45.5 F)
2020
10.0 C (50.0 F)
2021
6.5 C (43.7 F)
2022
5.0 C (41.0 F)
2023
9.8 C (49.6 F)
2024
11.5 C (52.7 F)
Wettest day (Rx1day)
The wettest day of the year at Derna, 1928 to 2024. The record is 199.9 mm (7.9 in) in 1992, marked on the chart; the median year is 30.5 mm (1.2 in).
Wettest day (Rx1day) at Derna by year
Year
Wettest day (Rx1day)
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1952
31.0 mm (1.2 in)
1953
79.5 mm (3.1 in)
1954
65.4 mm (2.6 in)
1955
13.3 mm (0.5 in)
1956
33.0 mm (1.3 in)
1957
47.0 mm (1.9 in)
1958
17.0 mm (0.7 in)
1959
50.0 mm (2.0 in)
1960
27.9 mm (1.1 in)
1961
48.0 mm (1.9 in)
1962
48.0 mm (1.9 in)
1963
36.1 mm (1.4 in)
1973
0.0 mm (0.00 in)
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
23.9 mm (0.9 in)
1983
56.9 mm (2.2 in)
1984
52.1 mm (2.1 in)
1985
21.1 mm (0.8 in)
1986
11.9 mm (0.5 in)
1987
7.9 mm (0.31 in)
1988
9.9 mm (0.39 in)
1989
18.0 mm (0.7 in)
1990
13.0 mm (0.5 in)
1991
29.0 mm (1.1 in)
1992
199.9 mm (7.9 in)
1993
153.9 mm (6.1 in)
1994
19.1 mm (0.8 in)
1995
16.0 mm (0.6 in)
1996
30.0 mm (1.2 in)
1997
20.1 mm (0.8 in)
1998
36.1 mm (1.4 in)
1999
6.1 mm (0.24 in)
2000
54.1 mm (2.1 in)
2001
32.0 mm (1.3 in)
2002
20.1 mm (0.8 in)
2003
6.1 mm (0.24 in)
2004
18.0 mm (0.7 in)
2005
104.9 mm (4.1 in)
2006
18.0 mm (0.7 in)
2007
24.9 mm (1.0 in)
2008
45.0 mm (1.8 in)
2009
39.1 mm (1.5 in)
2010
46.0 mm (1.8 in)
2011
125.0 mm (4.9 in)
2020
7.1 mm (0.28 in)
2021
51.1 mm (2.0 in)
2022
70.1 mm (2.8 in)
2023
70.1 mm (2.8 in)
2024
15.0 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Derna, 1928 to 2024. The record is 199.9 mm (7.9 in) in 1992, marked on the chart; the median year is 31.9 mm (1.3 in).
Wettest five days (Rx5day) at Derna by year
Year
Wettest five days (Rx5day)
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1952
47.1 mm (1.9 in)
1953
164.5 mm (6.5 in)
1954
154.0 mm (6.1 in)
1955
24.7 mm (1.0 in)
1956
87.9 mm (3.5 in)
1957
73.9 mm (2.9 in)
1958
56.9 mm (2.2 in)
1959
76.9 mm (3.0 in)
1960
31.9 mm (1.3 in)
1961
86.9 mm (3.4 in)
1962
67.0 mm (2.6 in)
1963
75.0 mm (3.0 in)
1973
0.0 mm (0.00 in)
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
10.9 mm (0.4 in)
1983
71.9 mm (2.8 in)
1984
56.2 mm (2.2 in)
1985
0.5 mm (0.02 in)
1986
8.4 mm (0.33 in)
1987
n/a
1988
n/a
1989
n/a
1990
13.5 mm (0.5 in)
1991
32.1 mm (1.3 in)
1992
199.9 mm (7.9 in)
1993
182.8 mm (7.2 in)
1994
0.0 mm (0.00 in)
1995
19.1 mm (0.8 in)
1996
31.0 mm (1.2 in)
1997
31.0 mm (1.2 in)
1998
70.1 mm (2.8 in)
1999
10.7 mm (0.4 in)
2000
6.0 mm (0.24 in)
2001
n/a
2002
0.0 mm (0.00 in)
2003
n/a
2004
4.0 mm (0.16 in)
2005
19.1 mm (0.8 in)
2006
5.6 mm (0.22 in)
2007
26.1 mm (1.0 in)
2008
28.3 mm (1.1 in)
2009
23.0 mm (0.9 in)
2010
57.6 mm (2.3 in)
2011
23.1 mm (0.9 in)
2020
n/a
2021
85.1 mm (3.4 in)
2022
102.1 mm (4.0 in)
2023
77.7 mm (3.1 in)
2024
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Derna, 1928 to 2024. The record is 202 days in 1955, marked on the chart; the median year is 10 days.
Longest dry spell (CDD) at Derna by year
Year
Longest dry spell (CDD)
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1952
129 days
1953
131 days
1954
174 days
1955
202 days
1956
149 days
1957
68 days
1958
125 days
1959
57 days
1960
157 days
1961
164 days
1962
98 days
1963
92 days
1973
5 days
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
6 days
1983
6 days
1984
10 days
1985
13 days
1986
8 days
1987
3 days
1988
1 day
1989
1 day
1990
22 days
1991
29 days
1992
12 days
1993
14 days
1994
10 days
1995
14 days
1996
34 days
1997
36 days
1998
28 days
1999
10 days
2000
3 days
2001
1 day
2002
6 days
2003
4 days
2004
7 days
2005
14 days
2006
2 days
2007
4 days
2008
4 days
2009
3 days
2010
2 days
2011
2 days
2020
1 day
2021
2 days
2022
2 days
2023
2 days
2024
2 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.
Download the Data
Data for Derna standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Derna 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.