Record envelope, standing records and threshold days for Palmyra (SY000040061), Syria, with 88 years of record.
Key Facts for Palmyra
Palmyra (SY000040061) is a weather station in Syria at 34.55 latitude and 38.30 longitude, 404 m (1,325 ft) above sea level.
The station reports from 1928 to 2015, 88 years of record.
1,464 records set at Palmyra still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Palmyra set a daily record high maximum temperature of 36.8 C (98.2 F) on 29 April 2015.
About the Station
Location: Syria, 34.55 latitude, 38.30 longitude.
Elevation: 404 m (1,325 ft).
Period of record: 1928 to 2015, 88 years.
Eligible elements: tmax, tmin, prcp.
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 Palmyra. 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 Palmyra, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.4 C (70.5 F)
-10.4 C (13.3 F)
n/a
n/a
Feb
27.4 C (81.3 F)
-7.6 C (18.3 F)
n/a
n/a
Mar
36.0 C (96.8 F)
-6.7 C (19.9 F)
n/a
n/a
Apr
38.8 C (101.8 F)
-1.0 C (30.2 F)
n/a
n/a
May
42.4 C (108.3 F)
7.1 C (44.8 F)
n/a
n/a
Jun
45.3 C (113.5 F)
12.2 C (54.0 F)
n/a
n/a
Jul
48.3 C (118.9 F)
12.5 C (54.5 F)
n/a
n/a
Aug
46.0 C (114.8 F)
14.9 C (58.8 F)
n/a
n/a
Sep
43.6 C (110.5 F)
9.0 C (48.2 F)
n/a
n/a
Oct
38.2 C (100.8 F)
3.2 C (37.8 F)
n/a
n/a
Nov
31.2 C (88.2 F)
-6.1 C (21.0 F)
n/a
n/a
Dec
23.4 C (74.1 F)
-8.5 C (16.7 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Palmyra still stand. 2010 holds the most, with 67.
Standing records at Palmyra by the year they were set
Year set
Standing records
1928
3
1929
10
1930
3
1955
3
1956
19
1957
5
1958
18
1959
20
1960
13
1961
15
1962
8
1963
9
1964
19
1965
42
1966
26
1967
31
1968
12
1969
19
1970
27
1971
29
1972
26
1973
30
1974
19
1975
23
1976
30
1977
13
1978
35
1979
24
1980
31
1981
23
1982
15
1983
27
1984
24
1985
35
1986
18
1987
33
1988
18
1989
22
1990
31
1991
24
1992
41
1993
30
1994
38
1995
22
1996
26
1997
38
1998
57
1999
22
2000
28
2001
18
2002
12
2003
22
2004
27
2005
8
2006
15
2007
17
2008
24
2009
21
2010
67
2011
11
2012
30
2013
19
2014
27
2015
12
All-Time Record Progression
7 new records
7 all-time records were set at Palmyra between 7 January 1979 and 28 August 2008. Each dot is a new record.
When Palmyra set new all-time records
Date
Kind
Detail
1979-01-07
Record daily precipitation
Record daily precipitation 69.0 mm (2.7 in)
1986-09-01
Record high minimum temperature
Record high minimum temperature 31.5 C (88.7 F)
1998-07-23
Record high maximum temperature
Record high maximum temperature 48.3 C (118.9 F)
2002-10-19
Record daily precipitation
Record daily precipitation 70.1 mm (2.8 in)
2006-08-09
Record daily precipitation
Record daily precipitation 71.4 mm (2.8 in)
2008-01-16
Record low minimum temperature
Record low minimum temperature -10.4 C (13.3 F)
2008-08-28
Record high minimum temperature
Record high minimum temperature 31.6 C (88.9 F)
Wettest Day of Each Month
Aug: 71.4 mm (2.8 in)
The wettest day on record for each calendar month at Palmyra. The most was 71.4 mm (2.8 in) on 9 August 2006.
Record daily precipitation for each month at Palmyra
Month
Record daily precipitation (mm)
Date
Jan
69.0 mm (2.7 in)
7 January 1979
Feb
29.0 mm (1.1 in)
20 February 1975
Mar
48.9 mm (1.9 in)
14 March 1972
Apr
36.0 mm (1.4 in)
13 April 1988
May
31.0 mm (1.2 in)
11 May 1993
Jun
6.8 mm (0.27 in)
11 June 1957
Jul
4.1 mm (0.16 in)
11 July 2002
Aug
71.4 mm (2.8 in)
9 August 2006
Sep
2.0 mm (0.08 in)
23 September 1963
Oct
70.1 mm (2.8 in)
19 October 2002
Nov
28.0 mm (1.1 in)
6 November 1984
Dec
34.2 mm (1.3 in)
11 December 1974
Period of Record Coverage
1960 to 2015
Complete yearUnder 90 percent of days
56 years of record at Palmyra, 1960 to 2015. 21 years have data for under 90 percent of days and are left out of rankings: 1960, 1961, 1962, 1963, 1964, 2000, 2001, 2002 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 35 complete years at Palmyra, 1965 to 1999. Blue stripes are years cooler than the station's own mean of 19.0 C (66.2 F); red stripes are warmer. The coolest year was 1967, at 17.7 C (63.9 F), and the warmest was 1998, at 20.4 C (68.7 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Palmyra as warming stripes, 1965 to 1999
Year
Annual mean temperature
Difference from the station mean
1965
19.0 C
-0.02 C
1966
19.7 C
+0.76 C
1967
17.7 C
-1.24 C
1968
19.0 C
-0.01 C
1969
19.1 C
+0.10 C
1970
19.2 C
+0.26 C
1971
18.7 C
-0.26 C
1972
18.0 C
-1.00 C
1973
18.6 C
-0.40 C
1974
18.7 C
-0.32 C
1975
18.6 C
-0.35 C
1976
18.2 C
-0.82 C
1977
19.0 C
-0.03 C
1978
19.3 C
+0.34 C
1979
19.7 C
+0.72 C
1980
18.9 C
-0.04 C
1981
19.1 C
+0.14 C
1982
18.2 C
-0.83 C
1983
18.4 C
-0.63 C
1984
18.7 C
-0.28 C
1985
19.1 C
+0.07 C
1986
19.3 C
+0.32 C
1987
19.0 C
+0.05 C
1988
18.8 C
-0.14 C
1989
19.5 C
+0.52 C
1990
19.2 C
+0.25 C
1991
19.1 C
+0.11 C
1992
17.8 C
-1.15 C
1993
18.7 C
-0.25 C
1994
19.9 C
+0.88 C
1995
19.4 C
+0.37 C
1996
19.9 C
+0.89 C
1997
18.6 C
-0.34 C
1998
20.4 C
+1.42 C
1999
20.0 C
+1.02 C
The annual mean temperature here has risen by 0.23 C (0.03 to 0.42) per decade over 1965 to 1999. In Fahrenheit: 0.4 F (0.1 to 0.8) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Palmyra
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.23 C (0.03 to 0.42) per decade
0.4 F (0.1 to 0.8) per decade
1965 to 1999
35
Rise
Mean daily maximum
0.20 C (-0.04 to 0.44) per decade
0.4 F (-0.1 to 0.8) per decade
1965 to 1999
35
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.8) per decade
1965 to 1999
35
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
1928 to 2015
Yearly extremes at Palmyra: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
48.3 C (118.9 F)
1998
42.7 C (108.9 F)
56
Coldest night (TNn)
-10.4 C (13.3 F)
2008
-3.8 C (25.1 F)
64
Wettest day (Rx1day)
71.4 mm (2.8 in)
2006
17.0 mm (0.7 in)
77
Wettest five days (Rx5day)
94.0 mm (3.7 in)
1979
23.0 mm (0.9 in)
70
Longest dry spell (CDD)
246 days
1970
137 days
77
Hottest day (TXx)
The hottest day of the year at Palmyra, 1928 to 2015. The record is 48.3 C (118.9 F) in 1998, marked on the chart; the median year is 42.7 C (108.9 F).
Hottest day (TXx) at Palmyra by year
Year
Hottest day (TXx)
1928
n/a
1929
n/a
1930
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1944
n/a
1945
n/a
1946
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
42.8 C (109.0 F)
1961
42.8 C (109.0 F)
1962
17.8 C (64.0 F)
1963
42.8 C (109.0 F)
1964
40.0 C (104.0 F)
1965
44.5 C (112.1 F)
1966
44.4 C (111.9 F)
1967
41.1 C (106.0 F)
1968
43.6 C (110.5 F)
1969
41.4 C (106.5 F)
1970
41.1 C (106.0 F)
1971
40.8 C (105.4 F)
1972
41.0 C (105.8 F)
1973
43.0 C (109.4 F)
1974
44.1 C (111.4 F)
1975
43.6 C (110.5 F)
1976
40.5 C (104.9 F)
1977
42.3 C (108.1 F)
1978
45.5 C (113.9 F)
1979
42.2 C (108.0 F)
1980
44.8 C (112.6 F)
1981
43.6 C (110.5 F)
1982
40.4 C (104.7 F)
1983
41.7 C (107.1 F)
1984
41.0 C (105.8 F)
1985
43.5 C (110.3 F)
1986
43.6 C (110.5 F)
1987
46.0 C (114.8 F)
1988
40.7 C (105.3 F)
1989
42.1 C (107.8 F)
1990
41.5 C (106.7 F)
1991
42.2 C (108.0 F)
1992
42.3 C (108.1 F)
1993
42.6 C (108.7 F)
1994
42.4 C (108.3 F)
1995
42.4 C (108.3 F)
1996
43.2 C (109.8 F)
1997
41.7 C (107.1 F)
1998
48.3 C (118.9 F)
1999
44.5 C (112.1 F)
2000
45.6 C (114.1 F)
2001
44.0 C (111.2 F)
2002
43.6 C (110.5 F)
2003
42.5 C (108.5 F)
2004
43.3 C (109.9 F)
2005
42.7 C (108.9 F)
2006
42.6 C (108.7 F)
2007
44.5 C (112.1 F)
2008
44.2 C (111.6 F)
2009
41.6 C (106.9 F)
2010
47.0 C (116.6 F)
2011
44.5 C (112.1 F)
2012
45.4 C (113.7 F)
2013
41.5 C (106.7 F)
2014
42.7 C (108.9 F)
2015
36.8 C (98.2 F)
Coldest night (TNn)
The coldest night of the year at Palmyra, 1928 to 2015. The record is -10.4 C (13.3 F) in 2008, marked on the chart; the median year is -3.8 C (25.1 F).
Coldest night (TNn) at Palmyra by year
Year
Coldest night (TNn)
1928
-2.0 C (28.4 F)
1929
-4.9 C (23.2 F)
1930
0.0 C (32.0 F)
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1944
n/a
1945
n/a
1946
n/a
1954
n/a
1955
-1.0 C (30.2 F)
1956
-5.0 C (23.0 F)
1957
-5.0 C (23.0 F)
1958
-6.0 C (21.2 F)
1959
-6.0 C (21.2 F)
1960
-3.9 C (25.0 F)
1961
-2.8 C (27.0 F)
1962
-2.0 C (28.4 F)
1963
-2.5 C (27.5 F)
1964
-8.1 C (17.4 F)
1965
-4.4 C (24.1 F)
1966
-1.1 C (30.0 F)
1967
-7.6 C (18.3 F)
1968
-3.7 C (25.3 F)
1969
-0.5 C (31.1 F)
1970
-3.4 C (25.9 F)
1971
-4.0 C (24.8 F)
1972
-8.5 C (16.7 F)
1973
-6.6 C (20.1 F)
1974
-4.0 C (24.8 F)
1975
-5.4 C (22.3 F)
1976
-3.8 C (25.2 F)
1977
-4.0 C (24.8 F)
1978
-2.6 C (27.3 F)
1979
-1.2 C (29.8 F)
1980
-4.7 C (23.5 F)
1981
-0.8 C (30.6 F)
1982
-3.2 C (26.2 F)
1983
-5.6 C (21.9 F)
1984
-1.3 C (29.7 F)
1985
-6.7 C (19.9 F)
1986
-5.6 C (21.9 F)
1987
-2.2 C (28.0 F)
1988
-3.4 C (25.9 F)
1989
-4.8 C (23.4 F)
1990
-8.5 C (16.7 F)
1991
-2.6 C (27.3 F)
1992
-7.2 C (19.0 F)
1993
-6.1 C (21.0 F)
1994
-2.2 C (28.0 F)
1995
-3.3 C (26.1 F)
1996
-2.0 C (28.4 F)
1997
-4.8 C (23.4 F)
1998
-3.4 C (25.9 F)
1999
-4.0 C (24.8 F)
2000
-8.2 C (17.2 F)
2001
-3.0 C (26.6 F)
2002
-3.2 C (26.2 F)
2003
-2.4 C (27.7 F)
2004
-6.8 C (19.8 F)
2005
-4.1 C (24.6 F)
2006
-3.5 C (25.7 F)
2007
-6.8 C (19.8 F)
2008
-10.4 C (13.3 F)
2009
-4.9 C (23.2 F)
2010
-3.8 C (25.2 F)
2011
-3.4 C (25.9 F)
2012
-3.8 C (25.2 F)
2013
-2.8 C (27.0 F)
2014
-1.2 C (29.8 F)
2015
-4.4 C (24.1 F)
Wettest day (Rx1day)
The wettest day of the year at Palmyra, 1928 to 2015. The record is 71.4 mm (2.8 in) in 2006, marked on the chart; the median year is 17.0 mm (0.7 in).
Wettest day (Rx1day) at Palmyra by year
Year
Wettest day (Rx1day)
1928
4.0 mm (0.16 in)
1929
19.9 mm (0.8 in)
1930
20.0 mm (0.8 in)
1933
9.0 mm (0.35 in)
1934
14.0 mm (0.6 in)
1935
22.0 mm (0.9 in)
1936
12.0 mm (0.5 in)
1937
14.0 mm (0.6 in)
1938
17.0 mm (0.7 in)
1939
28.0 mm (1.1 in)
1940
23.0 mm (0.9 in)
1941
6.0 mm (0.24 in)
1944
23.0 mm (0.9 in)
1945
12.0 mm (0.5 in)
1946
4.0 mm (0.16 in)
1954
11.0 mm (0.4 in)
1955
9.0 mm (0.35 in)
1956
22.6 mm (0.9 in)
1957
19.4 mm (0.8 in)
1958
10.5 mm (0.4 in)
1959
14.0 mm (0.6 in)
1960
4.1 mm (0.16 in)
1961
7.9 mm (0.31 in)
1962
17.6 mm (0.7 in)
1963
20.7 mm (0.8 in)
1964
10.9 mm (0.4 in)
1965
31.3 mm (1.2 in)
1966
25.8 mm (1.0 in)
1967
11.4 mm (0.4 in)
1968
25.8 mm (1.0 in)
1969
20.0 mm (0.8 in)
1970
10.6 mm (0.4 in)
1971
18.3 mm (0.7 in)
1972
48.9 mm (1.9 in)
1973
8.9 mm (0.35 in)
1974
40.3 mm (1.6 in)
1975
29.0 mm (1.1 in)
1976
23.0 mm (0.9 in)
1977
26.0 mm (1.0 in)
1978
10.0 mm (0.4 in)
1979
69.0 mm (2.7 in)
1980
23.0 mm (0.9 in)
1981
21.0 mm (0.8 in)
1982
16.0 mm (0.6 in)
1983
21.0 mm (0.8 in)
1984
28.0 mm (1.1 in)
1985
15.0 mm (0.6 in)
1986
27.0 mm (1.1 in)
1987
13.0 mm (0.5 in)
1988
36.0 mm (1.4 in)
1989
22.0 mm (0.9 in)
1990
19.0 mm (0.7 in)
1991
27.0 mm (1.1 in)
1992
28.0 mm (1.1 in)
1993
31.0 mm (1.2 in)
1994
15.0 mm (0.6 in)
1995
16.0 mm (0.6 in)
1996
19.0 mm (0.7 in)
1997
23.0 mm (0.9 in)
1998
16.0 mm (0.6 in)
1999
9.0 mm (0.35 in)
2000
16.0 mm (0.6 in)
2001
7.1 mm (0.28 in)
2002
70.1 mm (2.8 in)
2003
6.6 mm (0.26 in)
2004
16.5 mm (0.6 in)
2005
10.2 mm (0.4 in)
2006
71.4 mm (2.8 in)
2007
8.9 mm (0.35 in)
2008
11.9 mm (0.5 in)
2009
10.9 mm (0.4 in)
2010
8.9 mm (0.35 in)
2011
25.9 mm (1.0 in)
2012
11.4 mm (0.4 in)
2013
4.3 mm (0.17 in)
2014
34.0 mm (1.3 in)
2015
8.1 mm (0.32 in)
Wettest five days (Rx5day)
The wettest five days of the year at Palmyra, 1928 to 2015. The record is 94.0 mm (3.7 in) in 1979, marked on the chart; the median year is 23.0 mm (0.9 in).
Wettest five days (Rx5day) at Palmyra by year
Year
Wettest five days (Rx5day)
1928
4.0 mm (0.16 in)
1929
19.9 mm (0.8 in)
1930
35.0 mm (1.4 in)
1933
19.0 mm (0.7 in)
1934
20.0 mm (0.8 in)
1935
44.0 mm (1.7 in)
1936
31.0 mm (1.2 in)
1937
18.0 mm (0.7 in)
1938
30.0 mm (1.2 in)
1939
45.0 mm (1.8 in)
1940
23.0 mm (0.9 in)
1941
12.0 mm (0.5 in)
1944
23.0 mm (0.9 in)
1945
23.0 mm (0.9 in)
1946
12.0 mm (0.5 in)
1954
21.2 mm (0.8 in)
1955
16.0 mm (0.6 in)
1956
32.0 mm (1.3 in)
1957
20.6 mm (0.8 in)
1958
16.6 mm (0.7 in)
1959
14.1 mm (0.6 in)
1960
4.1 mm (0.16 in)
1961
7.9 mm (0.31 in)
1962
24.4 mm (1.0 in)
1963
33.1 mm (1.3 in)
1964
23.6 mm (0.9 in)
1965
47.9 mm (1.9 in)
1966
38.2 mm (1.5 in)
1967
19.2 mm (0.8 in)
1968
30.3 mm (1.2 in)
1969
30.4 mm (1.2 in)
1970
15.9 mm (0.6 in)
1971
29.4 mm (1.2 in)
1972
61.6 mm (2.4 in)
1973
9.6 mm (0.38 in)
1974
70.7 mm (2.8 in)
1975
33.5 mm (1.3 in)
1976
28.0 mm (1.1 in)
1977
47.0 mm (1.9 in)
1978
11.0 mm (0.4 in)
1979
94.0 mm (3.7 in)
1980
31.0 mm (1.2 in)
1981
31.0 mm (1.2 in)
1982
20.0 mm (0.8 in)
1983
23.0 mm (0.9 in)
1984
47.0 mm (1.9 in)
1985
28.0 mm (1.1 in)
1986
33.0 mm (1.3 in)
1987
23.0 mm (0.9 in)
1988
48.0 mm (1.9 in)
1989
26.0 mm (1.0 in)
1990
23.0 mm (0.9 in)
1991
39.0 mm (1.5 in)
1992
35.0 mm (1.4 in)
1993
46.0 mm (1.8 in)
1994
35.0 mm (1.4 in)
1995
17.0 mm (0.7 in)
1996
36.0 mm (1.4 in)
1997
31.0 mm (1.2 in)
1998
22.0 mm (0.9 in)
1999
12.0 mm (0.5 in)
2000
0.0 mm (0.00 in)
2001
n/a
2002
85.6 mm (3.4 in)
2003
6.6 mm (0.26 in)
2004
6.1 mm (0.24 in)
2005
0.5 mm (0.02 in)
2006
n/a
2007
n/a
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2012
5.1 mm (0.20 in)
2013
4.3 mm (0.17 in)
2014
1.3 mm (0.05 in)
2015
8.1 mm (0.32 in)
Longest dry spell (CDD)
The longest dry spell of the year at Palmyra, 1928 to 2015. The record is 246 days in 1970, marked on the chart; the median year is 137 days.
Longest dry spell (CDD) at Palmyra by year
Year
Longest dry spell (CDD)
1928
46 days
1929
52 days
1930
36 days
1933
181 days
1934
162 days
1935
137 days
1936
165 days
1937
135 days
1938
116 days
1939
92 days
1940
99 days
1941
41 days
1944
35 days
1945
89 days
1946
23 days
1954
10 days
1955
92 days
1956
186 days
1957
132 days
1958
153 days
1959
167 days
1960
12 days
1961
12 days
1962
162 days
1963
117 days
1964
195 days
1965
158 days
1966
189 days
1967
143 days
1968
151 days
1969
143 days
1970
246 days
1971
191 days
1972
158 days
1973
211 days
1974
228 days
1975
140 days
1976
157 days
1977
156 days
1978
154 days
1979
140 days
1980
225 days
1981
183 days
1982
139 days
1983
173 days
1984
164 days
1985
158 days
1986
146 days
1987
118 days
1988
120 days
1989
173 days
1990
162 days
1991
156 days
1992
140 days
1993
149 days
1994
135 days
1995
179 days
1996
155 days
1997
128 days
1998
152 days
1999
54 days
2000
2 days
2001
3 days
2002
9 days
2003
17 days
2004
8 days
2005
6 days
2006
3 days
2007
2 days
2008
1 day
2009
3 days
2010
1 day
2011
3 days
2012
4 days
2013
7 days
2014
3 days
2015
3 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
32 years with a frost
Across 32 years with a frost, the median last spring frost at Palmyra falls on 18 February and the median first autumn frost on 2 December, which leaves a median of 289 days between them.
Fitted over all years, the growing season changes by -9.0 days per decade at this station.
Frost dates and growing season at Palmyra
Measure
Median, all years
Earliest period
Recent period (1967 to 1999)
Recent against earliest
Fitted trend
Last spring frost
18 February
n/a
18 February
n/a
+2.9 days per decade
First autumn frost
2 December
n/a
1 December
n/a
-6.1 days per decade
Growing days
289 days
n/a
289 days
n/a
-9.0 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
47 years, 1934 to 1998
A day with at least 19.7 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 60.2 mm (2.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Palmyra: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
19.7 mm (0.8 in)
5 years
28.4 mm (1.1 in)
10 years
34.9 mm (1.4 in)
25 years
44.2 mm (1.7 in)
50 years
51.9 mm (2.0 in)
Longer than the 47 years of record
100 years
60.2 mm (2.4 in)
Longer than the 47 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, 47 years of values from 1934 to 1998.
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: 69.0 mm (2.7 in) in 1979; 48.9 mm (1.9 in) in 1972; 40.3 mm (1.6 in) in 1974.
Download the Data
Data for Palmyra standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Palmyra 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.