Record envelope, standing records and threshold days for Cairo 1SW (USC00091463), Georgia, United States, with 95 years of record.
Key Facts for Cairo 1SW
Cairo 1SW (USC00091463) is a weather station in Georgia, United States at 30.87 latitude and -84.22 longitude, 61 m (201 ft) above sea level.
The station reports from 1927 to 2021, 95 years of record.
1,464 records set at Cairo 1SW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Cairo 1SW tied a daily record high minimum temperature of 23.3 C (73.9 F) on 25 August 2021.
About the Station
Location: Georgia, United States, 30.87 latitude, -84.22 longitude.
Elevation: 61 m (201 ft).
Period of record: 1927 to 2021, 95 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 Cairo 1SW. 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 Cairo 1SW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
28.9 C (84.0 F)
-13.9 C (7.0 F)
n/a
n/a
Feb
29.4 C (84.9 F)
-8.3 C (17.1 F)
n/a
n/a
Mar
32.2 C (90.0 F)
-6.1 C (21.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
0.0 C (32.0 F)
n/a
n/a
May
38.3 C (100.9 F)
5.0 C (41.0 F)
n/a
n/a
Jun
39.4 C (102.9 F)
9.4 C (48.9 F)
n/a
n/a
Jul
40.6 C (105.1 F)
13.3 C (55.9 F)
n/a
n/a
Aug
38.3 C (100.9 F)
15.0 C (59.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
4.4 C (39.9 F)
n/a
n/a
Oct
35.0 C (95.0 F)
0.0 C (32.0 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-8.9 C (16.0 F)
n/a
n/a
Dec
28.9 C (84.0 F)
-13.9 C (7.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Cairo 1SW still stand. 1932 holds the most, with 59.
Standing records at Cairo 1SW by the year they were set
Year set
Standing records
1932
59
1933
43
1934
19
1935
25
1936
17
1937
48
1938
24
1939
26
1940
39
1941
23
1942
20
1943
43
1944
41
1945
31
1946
21
1947
21
1948
18
1949
6
1950
34
1951
28
1952
20
1953
29
1954
32
1955
32
1956
30
1957
32
1958
22
1959
16
1960
22
1961
30
1962
20
1963
23
1964
19
1965
15
1966
17
1967
37
1968
31
1969
9
1970
23
1971
18
1972
19
1973
6
2002
1
2003
10
2004
4
2005
23
2006
12
2007
26
2008
4
2009
8
2010
36
2011
34
2012
24
2013
11
2014
30
2015
30
2016
9
2017
20
2018
21
2019
24
2020
25
2021
24
All-Time Record Progression
5 new records
5 all-time records were set at Cairo 1SW between 13 December 1962 and 10 July 2021. Each dot is a new record.
When Cairo 1SW set new all-time records
Date
Kind
Detail
1962-12-13
Record low minimum temperature
Record low minimum temperature -13.9 C (7.0 F)
1964-12-04
Record daily precipitation
Record daily precipitation 235.2 mm (9.3 in)
2014-01-08
Record low maximum temperature
Record low maximum temperature -1.1 C (30.0 F)
2021-07-09
Record high minimum temperature
Record high minimum temperature 28.3 C (82.9 F)
2021-07-10
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
Wettest Day of Each Month
Dec: 235.2 mm (9.3 in)
The wettest day on record for each calendar month at Cairo 1SW. The most was 235.2 mm (9.3 in) on 4 December 1964.
Record daily precipitation for each month at Cairo 1SW
Month
Record daily precipitation (mm)
Date
Jan
93.0 mm (3.7 in)
20 January 1991
Feb
111.0 mm (4.4 in)
14 February 1944
Mar
141.0 mm (5.6 in)
8 March 1930
Apr
207.0 mm (8.1 in)
1 April 1948
May
125.0 mm (4.9 in)
2 May 1964
Jun
113.8 mm (4.5 in)
6 June 1995
Jul
118.1 mm (4.6 in)
15 July 1928
Aug
120.7 mm (4.8 in)
12 August 1996
Sep
188.0 mm (7.4 in)
21 September 1969
Oct
127.0 mm (5.0 in)
3 October 1994
Nov
91.9 mm (3.6 in)
15 November 1951
Dec
235.2 mm (9.3 in)
4 December 1964
Period of Record Coverage
1932 to 2021
Complete yearUnder 90 percent of days
62 years of record at Cairo 1SW, 1932 to 2021. 15 years have data for under 90 percent of days and are left out of rankings: 1972, 1973, 2002, 2003, 2004, 2005, 2008, 2009 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 48 complete years at Cairo 1SW, 1932 to 2020. Blue stripes are years cooler than the station's own mean of 19.6 C (67.3 F); red stripes are warmer. The coolest year was 2011, at 17.9 C (64.3 F), and the warmest was 1933, at 20.7 C (69.3 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Cairo 1SW as warming stripes, 1932 to 2020
Year
Annual mean temperature
Difference from the station mean
1932
20.6 C
+0.98 C
1933
20.7 C
+1.12 C
1934
19.5 C
-0.13 C
1935
19.5 C
-0.13 C
1936
19.7 C
+0.09 C
1937
19.3 C
-0.29 C
1938
19.9 C
+0.25 C
1939
19.5 C
-0.16 C
1940
18.3 C
-1.29 C
1941
19.6 C
-0.03 C
1942
19.4 C
-0.17 C
1943
19.8 C
+0.15 C
1944
20.0 C
+0.35 C
1945
20.2 C
+0.54 C
1946
20.3 C
+0.69 C
1947
19.5 C
-0.09 C
1948
20.2 C
+0.55 C
1949
20.5 C
+0.93 C
1950
19.7 C
+0.06 C
1951
19.9 C
+0.26 C
1952
19.7 C
+0.13 C
1953
19.8 C
+0.20 C
1954
20.1 C
+0.45 C
1955
19.9 C
+0.25 C
1956
19.7 C
+0.05 C
1957
20.3 C
+0.72 C
1958
19.0 C
-0.58 C
1959
19.8 C
+0.23 C
1960
19.0 C
-0.58 C
1961
19.5 C
-0.12 C
1962
19.8 C
+0.19 C
1963
19.1 C
-0.53 C
1964
19.3 C
-0.31 C
1965
19.8 C
+0.17 C
1966
19.0 C
-0.62 C
1967
19.8 C
+0.21 C
1968
19.2 C
-0.46 C
1969
19.0 C
-0.59 C
1970
19.4 C
-0.21 C
1971
19.7 C
+0.08 C
2007
19.9 C
+0.28 C
2011
17.9 C
-1.68 C
2012
18.8 C
-0.85 C
2014
18.5 C
-1.11 C
2016
19.8 C
+0.18 C
2017
19.9 C
+0.31 C
2018
19.4 C
-0.17 C
2020
20.1 C
+0.50 C
The annual mean temperature here has fallen by 0.07 C (0.01 to 0.13) per decade over 1932 to 2020. In Fahrenheit: 0.12 F (0.01 to 0.23) per decade. The slope is a straight line fitted to 48 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Cairo 1SW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.07 C (-0.13 to -0.01) per decade
-0.12 F (-0.23 to -0.01) per decade
1932 to 2020
48
Fall
Mean daily maximum
-0.04 C (-0.10 to 0.02) per decade
-0.07 F (-0.19 to 0.04) per decade
1932 to 2020
48
Not clearly different from zero
Mean daily minimum
-0.09 C (-0.18 to -0.01) per decade
-0.17 F (-0.32 to -0.02) per decade
1932 to 2020
48
Fall
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
1927 to 2021
Yearly extremes at Cairo 1SW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
2021
36.7 C (98.1 F)
62
Coldest night (TNn)
-13.9 C (7.0 F)
1962
-6.7 C (19.9 F)
62
Wettest day (Rx1day)
235.2 mm (9.3 in)
1964
88.6 mm (3.5 in)
81
Wettest five days (Rx5day)
288.8 mm (11.4 in)
1948
134.9 mm (5.3 in)
81
Longest dry spell (CDD)
71 days
1933
23 days
81
Hottest day (TXx)
The hottest day of the year at Cairo 1SW, 1927 to 2021. The record is 40.6 C (105.1 F) in 2021, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Cairo 1SW by year
Year
Hottest day (TXx)
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
38.3 C (100.9 F)
1933
37.8 C (100.0 F)
1934
35.6 C (96.1 F)
1935
36.1 C (97.0 F)
1936
36.1 C (97.0 F)
1937
36.7 C (98.1 F)
1938
38.3 C (100.9 F)
1939
36.1 C (97.0 F)
1940
35.6 C (96.1 F)
1941
36.7 C (98.1 F)
1942
38.3 C (100.9 F)
1943
38.3 C (100.9 F)
1944
39.4 C (102.9 F)
1945
37.2 C (99.0 F)
1946
35.6 C (96.1 F)
1947
36.1 C (97.0 F)
1948
37.8 C (100.0 F)
1949
36.1 C (97.0 F)
1950
37.8 C (100.0 F)
1951
36.7 C (98.1 F)
1952
39.4 C (102.9 F)
1953
38.3 C (100.9 F)
1954
39.4 C (102.9 F)
1955
35.6 C (96.1 F)
1956
37.2 C (99.0 F)
1957
36.7 C (98.1 F)
1958
36.7 C (98.1 F)
1959
37.2 C (99.0 F)
1960
36.7 C (98.1 F)
1961
36.1 C (97.0 F)
1962
37.2 C (99.0 F)
1963
36.7 C (98.1 F)
1964
37.8 C (100.0 F)
1965
35.6 C (96.1 F)
1966
37.2 C (99.0 F)
1967
37.2 C (99.0 F)
1968
38.3 C (100.9 F)
1969
38.3 C (100.9 F)
1970
37.2 C (99.0 F)
1971
36.7 C (98.1 F)
1972
37.2 C (99.0 F)
1973
34.4 C (93.9 F)
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
32.2 C (90.0 F)
2003
34.4 C (93.9 F)
2004
36.1 C (97.0 F)
2005
36.7 C (98.1 F)
2006
36.7 C (98.1 F)
2007
38.3 C (100.9 F)
2008
36.7 C (98.1 F)
2009
33.9 C (93.0 F)
2010
38.3 C (100.9 F)
2011
37.8 C (100.0 F)
2012
34.4 C (93.9 F)
2013
34.4 C (93.9 F)
2014
37.2 C (99.0 F)
2015
36.7 C (98.1 F)
2016
35.6 C (96.1 F)
2017
35.0 C (95.0 F)
2018
35.6 C (96.1 F)
2019
37.8 C (100.0 F)
2020
35.6 C (96.1 F)
2021
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Cairo 1SW, 1927 to 2021. The record is -13.9 C (7.0 F) in 1962, marked on the chart; the median year is -6.7 C (19.9 F).
Coldest night (TNn) at Cairo 1SW by year
Year
Coldest night (TNn)
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
-5.6 C (21.9 F)
1933
-8.3 C (17.1 F)
1934
-7.2 C (19.0 F)
1935
-7.2 C (19.0 F)
1936
-7.2 C (19.0 F)
1937
-8.3 C (17.1 F)
1938
-6.1 C (21.0 F)
1939
-5.0 C (23.0 F)
1940
-10.0 C (14.0 F)
1941
-3.9 C (25.0 F)
1942
-7.2 C (19.0 F)
1943
-7.2 C (19.0 F)
1944
-6.1 C (21.0 F)
1945
-6.1 C (21.0 F)
1946
-2.2 C (28.0 F)
1947
-5.6 C (21.9 F)
1948
-8.3 C (17.1 F)
1949
-2.2 C (28.0 F)
1950
-7.8 C (18.0 F)
1951
-8.3 C (17.1 F)
1952
-3.9 C (25.0 F)
1953
-6.1 C (21.0 F)
1954
-5.0 C (23.0 F)
1955
-6.1 C (21.0 F)
1956
-4.4 C (24.1 F)
1957
-7.8 C (18.0 F)
1958
-8.3 C (17.1 F)
1959
-7.8 C (18.0 F)
1960
-6.7 C (19.9 F)
1961
-7.8 C (18.0 F)
1962
-13.9 C (7.0 F)
1963
-11.1 C (12.0 F)
1964
-8.3 C (17.1 F)
1965
-6.7 C (19.9 F)
1966
-13.9 C (7.0 F)
1967
-6.1 C (21.0 F)
1968
-6.7 C (19.9 F)
1969
-7.8 C (18.0 F)
1970
-10.0 C (14.0 F)
1971
-7.8 C (18.0 F)
1972
-7.8 C (18.0 F)
1973
-4.4 C (24.1 F)
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
-2.8 C (27.0 F)
2003
-9.4 C (15.1 F)
2004
-3.9 C (25.0 F)
2005
-3.3 C (26.1 F)
2006
-5.0 C (23.0 F)
2007
-5.0 C (23.0 F)
2008
-5.6 C (21.9 F)
2009
-6.1 C (21.0 F)
2010
-7.8 C (18.0 F)
2011
-8.3 C (17.1 F)
2012
-7.8 C (18.0 F)
2013
-4.4 C (24.1 F)
2014
-7.8 C (18.0 F)
2015
-6.7 C (19.9 F)
2016
-3.3 C (26.1 F)
2017
-3.9 C (25.0 F)
2018
-6.1 C (21.0 F)
2019
-2.2 C (28.0 F)
2020
-5.0 C (23.0 F)
2021
-3.3 C (26.1 F)
Wettest day (Rx1day)
The wettest day of the year at Cairo 1SW, 1927 to 2021. The record is 235.2 mm (9.3 in) in 1964, marked on the chart; the median year is 88.6 mm (3.5 in).
Wettest day (Rx1day) at Cairo 1SW by year
Year
Wettest day (Rx1day)
1927
127.0 mm (5.0 in)
1928
118.1 mm (4.6 in)
1929
80.8 mm (3.2 in)
1930
141.2 mm (5.6 in)
1931
94.0 mm (3.7 in)
1932
118.9 mm (4.7 in)
1933
65.0 mm (2.6 in)
1934
83.8 mm (3.3 in)
1935
87.9 mm (3.5 in)
1936
75.2 mm (3.0 in)
1937
142.2 mm (5.6 in)
1938
61.7 mm (2.4 in)
1939
69.1 mm (2.7 in)
1940
71.6 mm (2.8 in)
1941
88.6 mm (3.5 in)
1942
89.9 mm (3.5 in)
1943
110.0 mm (4.3 in)
1944
111.0 mm (4.4 in)
1945
113.8 mm (4.5 in)
1946
80.8 mm (3.2 in)
1947
81.0 mm (3.2 in)
1948
207.0 mm (8.1 in)
1949
58.4 mm (2.3 in)
1950
90.2 mm (3.6 in)
1951
91.9 mm (3.6 in)
1952
73.4 mm (2.9 in)
1953
99.1 mm (3.9 in)
1954
54.4 mm (2.1 in)
1955
85.1 mm (3.4 in)
1956
120.9 mm (4.8 in)
1957
89.2 mm (3.5 in)
1958
86.1 mm (3.4 in)
1959
89.2 mm (3.5 in)
1960
108.7 mm (4.3 in)
1961
71.1 mm (2.8 in)
1962
123.2 mm (4.9 in)
1963
127.0 mm (5.0 in)
1964
235.2 mm (9.3 in)
1965
80.0 mm (3.1 in)
1966
67.6 mm (2.7 in)
1967
57.7 mm (2.3 in)
1968
45.5 mm (1.8 in)
1969
188.0 mm (7.4 in)
1970
75.9 mm (3.0 in)
1971
60.2 mm (2.4 in)
1972
112.3 mm (4.4 in)
1973
113.0 mm (4.4 in)
1988
61.0 mm (2.4 in)
1989
106.7 mm (4.2 in)
1990
76.7 mm (3.0 in)
1991
93.0 mm (3.7 in)
1992
86.9 mm (3.4 in)
1993
53.3 mm (2.1 in)
1994
127.0 mm (5.0 in)
1995
113.8 mm (4.5 in)
1996
120.7 mm (4.8 in)
1997
116.8 mm (4.6 in)
1998
87.9 mm (3.5 in)
1999
73.7 mm (2.9 in)
2000
59.2 mm (2.3 in)
2001
99.1 mm (3.9 in)
2002
129.5 mm (5.1 in)
2003
66.0 mm (2.6 in)
2004
94.2 mm (3.7 in)
2005
114.3 mm (4.5 in)
2006
78.7 mm (3.1 in)
2007
61.0 mm (2.4 in)
2008
88.4 mm (3.5 in)
2009
53.3 mm (2.1 in)
2010
55.9 mm (2.2 in)
2011
53.3 mm (2.1 in)
2012
115.6 mm (4.6 in)
2013
101.6 mm (4.0 in)
2014
116.8 mm (4.6 in)
2015
53.3 mm (2.1 in)
2016
141.7 mm (5.6 in)
2017
58.4 mm (2.3 in)
2018
166.4 mm (6.6 in)
2019
53.3 mm (2.1 in)
2020
84.3 mm (3.3 in)
2021
114.3 mm (4.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Cairo 1SW, 1927 to 2021. The record is 288.8 mm (11.4 in) in 1948, marked on the chart; the median year is 134.9 mm (5.3 in).
Wettest five days (Rx5day) at Cairo 1SW by year
Year
Wettest five days (Rx5day)
1927
138.4 mm (5.4 in)
1928
174.2 mm (6.9 in)
1929
115.4 mm (4.5 in)
1930
166.6 mm (6.6 in)
1931
109.6 mm (4.3 in)
1932
154.4 mm (6.1 in)
1933
106.8 mm (4.2 in)
1934
92.4 mm (3.6 in)
1935
134.9 mm (5.3 in)
1936
129.1 mm (5.1 in)
1937
151.4 mm (6.0 in)
1938
68.1 mm (2.7 in)
1939
84.3 mm (3.3 in)
1940
93.7 mm (3.7 in)
1941
130.3 mm (5.1 in)
1942
224.5 mm (8.8 in)
1943
129.3 mm (5.1 in)
1944
166.4 mm (6.6 in)
1945
168.9 mm (6.6 in)
1946
149.1 mm (5.9 in)
1947
135.2 mm (5.3 in)
1948
288.8 mm (11.4 in)
1949
92.9 mm (3.7 in)
1950
148.1 mm (5.8 in)
1951
96.8 mm (3.8 in)
1952
112.5 mm (4.4 in)
1953
120.4 mm (4.7 in)
1954
115.4 mm (4.5 in)
1955
127.5 mm (5.0 in)
1956
141.5 mm (5.6 in)
1957
125.3 mm (4.9 in)
1958
136.7 mm (5.4 in)
1959
139.2 mm (5.5 in)
1960
180.6 mm (7.1 in)
1961
128.2 mm (5.0 in)
1962
152.9 mm (6.0 in)
1963
142.0 mm (5.6 in)
1964
240.3 mm (9.5 in)
1965
195.5 mm (7.7 in)
1966
98.5 mm (3.9 in)
1967
121.1 mm (4.8 in)
1968
66.0 mm (2.6 in)
1969
212.3 mm (8.4 in)
1970
133.7 mm (5.3 in)
1971
74.0 mm (2.9 in)
1972
171.2 mm (6.7 in)
1973
142.1 mm (5.6 in)
1988
93.5 mm (3.7 in)
1989
136.4 mm (5.4 in)
1990
78.0 mm (3.1 in)
1991
170.6 mm (6.7 in)
1992
110.6 mm (4.4 in)
1993
79.2 mm (3.1 in)
1994
207.0 mm (8.1 in)
1995
193.8 mm (7.6 in)
1996
150.9 mm (5.9 in)
1997
117.4 mm (4.6 in)
1998
157.5 mm (6.2 in)
1999
84.9 mm (3.3 in)
2000
121.7 mm (4.8 in)
2001
135.1 mm (5.3 in)
2002
150.1 mm (5.9 in)
2003
107.9 mm (4.2 in)
2004
120.9 mm (4.8 in)
2005
212.1 mm (8.4 in)
2006
150.1 mm (5.9 in)
2007
99.1 mm (3.9 in)
2008
171.5 mm (6.8 in)
2009
97.6 mm (3.8 in)
2010
118.6 mm (4.7 in)
2011
80.0 mm (3.1 in)
2012
115.6 mm (4.6 in)
2013
256.7 mm (10.1 in)
2014
208.0 mm (8.2 in)
2015
68.3 mm (2.7 in)
2016
168.6 mm (6.6 in)
2017
88.7 mm (3.5 in)
2018
194.4 mm (7.7 in)
2019
68.0 mm (2.7 in)
2020
139.2 mm (5.5 in)
2021
153.0 mm (6.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Cairo 1SW, 1927 to 2021. The record is 71 days in 1933, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Cairo 1SW by year
Year
Longest dry spell (CDD)
1927
35 days
1928
23 days
1929
20 days
1930
27 days
1931
29 days
1932
17 days
1933
71 days
1934
23 days
1935
24 days
1936
45 days
1937
19 days
1938
23 days
1939
28 days
1940
26 days
1941
24 days
1942
20 days
1943
24 days
1944
20 days
1945
20 days
1946
27 days
1947
15 days
1948
31 days
1949
24 days
1950
14 days
1951
22 days
1952
27 days
1953
25 days
1954
21 days
1955
31 days
1956
30 days
1957
15 days
1958
23 days
1959
28 days
1960
24 days
1961
39 days
1962
16 days
1963
33 days
1964
34 days
1965
29 days
1966
21 days
1967
30 days
1968
18 days
1969
18 days
1970
22 days
1971
21 days
1972
23 days
1973
18 days
1988
25 days
1989
16 days
1990
23 days
1991
25 days
1992
29 days
1993
19 days
1994
25 days
1995
15 days
1996
21 days
1997
26 days
1998
30 days
1999
40 days
2000
33 days
2001
29 days
2002
24 days
2003
28 days
2004
30 days
2005
24 days
2006
16 days
2007
29 days
2008
18 days
2009
27 days
2010
30 days
2011
16 days
2012
15 days
2013
13 days
2014
22 days
2015
15 days
2016
21 days
2017
12 days
2018
19 days
2019
12 days
2020
11 days
2021
8 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
47 years with a frost
Across 47 years with a frost, the median last spring frost at Cairo 1SW falls on 7 March and the median first autumn frost on 22 November, which leaves a median of 254 days between them.
Fitted over all years, the growing season changes by -1.1 days per decade at this station.
Frost dates and growing season at Cairo 1SW
Measure
Median, all years
Earliest period
Recent period (1950 to 2020)
Recent against earliest
Fitted trend
Last spring frost
7 March
n/a
9 March
n/a
+0.4 days per decade
First autumn frost
22 November
n/a
19 November
n/a
-0.7 days per decade
Growing days
254 days
n/a
248 days
n/a
-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
68 years, 1927 to 2020
A day with at least 89.9 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 221.0 mm (8.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Cairo 1SW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
89.9 mm (3.5 in)
5 years
120.6 mm (4.7 in)
10 years
142.5 mm (5.6 in)
25 years
172.3 mm (6.8 in)
50 years
196.0 mm (7.7 in)
100 years
221.0 mm (8.7 in)
Longer than the 68 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, 68 years of values from 1927 to 2020.
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: 235.2 mm (9.3 in) in 1964; 207.0 mm (8.1 in) in 1948; 188.0 mm (7.4 in) in 1969.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Cairo 1SW, at 1942. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1942 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Cairo 1SW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1942
+0.3
+0.5
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 Cairo 1SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cairo 1SW 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.