Record envelope, standing records and threshold days for Roma Ciampino (IT000016239), Italy, with 75 years of record.
Key Facts for Roma Ciampino
Roma Ciampino (IT000016239) is a weather station in Italy at 41.78 latitude and 12.58 longitude, 105 m (344 ft) above sea level.
The station reports from 1951 to 2025, 75 years of record.
1,464 records set at Roma Ciampino still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Roma Ciampino set a daily record high minimum temperature of 23.0 C (73.4 F) on 5 July 2025.
About the Station
Location: Italy, 41.78 latitude, 12.58 longitude.
Elevation: 105 m (344 ft).
Period of record: 1951 to 2025, 75 years.
Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
10 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 Roma Ciampino. The lines show the 2026 daily maximum and minimum. 10 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Roma Ciampino, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.8 C (69.4 F)
-11.0 C (12.2 F)
17.4 C (63.3 F)
-0.2 C (31.6 F)
Feb
22.4 C (72.3 F)
-6.9 C (19.6 F)
17.4 C (63.3 F)
1.7 C (35.1 F)
Mar
26.6 C (79.9 F)
-6.5 C (20.3 F)
21.3 C (70.3 F)
3.2 C (37.8 F)
Apr
30.0 C (86.0 F)
-2.4 C (27.7 F)
24.6 C (76.3 F)
7.3 C (45.1 F)
May
34.2 C (93.6 F)
1.8 C (35.2 F)
30.1 C (86.2 F)
8.1 C (46.6 F)
Jun
39.3 C (102.7 F)
5.6 C (42.1 F)
37.1 C (98.8 F)
15.9 C (60.6 F)
Jul
39.4 C (102.9 F)
9.1 C (48.4 F)
37.1 C (98.8 F)
17.4 C (63.3 F)
Aug
40.6 C (105.1 F)
9.3 C (48.7 F)
38.0 C (100.4 F)
16.7 C (62.1 F)
Sep
38.4 C (101.1 F)
0.0 C (32.0 F)
n/a
n/a
Oct
31.9 C (89.4 F)
0.8 C (33.4 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-5.2 C (22.6 F)
n/a
n/a
Dec
20.8 C (69.4 F)
-5.6 C (21.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Roma Ciampino still stand. 1956 holds the most, with 42.
Standing records at Roma Ciampino by the year they were set
Year set
Standing records
1951
18
1952
29
1953
18
1954
17
1955
16
1956
42
1957
18
1958
24
1959
13
1960
23
1961
31
1962
36
1963
34
1964
19
1965
21
1966
13
1967
23
1968
26
1969
20
1970
23
1971
22
1972
23
1973
19
1974
14
1975
13
1976
5
1977
34
1978
30
1979
31
1980
34
1981
36
1982
16
1983
11
1984
13
1985
24
1986
16
1987
31
1988
15
1989
13
1990
14
1991
31
1992
9
1993
20
1994
16
1995
17
1996
30
1997
15
1998
12
1999
2
2000
10
2001
12
2002
22
2003
27
2004
16
2005
8
2006
15
2007
21
2008
14
2009
29
2010
12
2011
12
2012
30
2013
12
2014
18
2015
2
2017
9
2018
16
2019
13
2020
11
2021
14
2022
25
2023
32
2024
34
2025
20
All-Time Record Progression
5 new records
5 all-time records were set at Roma Ciampino between 4 August 1981 and 11 January 1985. Each dot is a new record.
When Roma Ciampino set new all-time records
Date
Kind
Detail
1981-08-04
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
1985-01-06
Record low maximum temperature
Record low maximum temperature 0.0 C (32.0 F)
1985-01-07
Record low maximum temperature
Record low maximum temperature -2.6 C (27.3 F)
1985-01-08
Record low minimum temperature
Record low minimum temperature -8.6 C (16.5 F)
1985-01-11
Record low minimum temperature
Record low minimum temperature -11.0 C (12.2 F)
Wettest Day of Each Month
Sep: 131.6 mm (5.2 in)
The wettest day on record for each calendar month at Roma Ciampino. The most was 131.6 mm (5.2 in) on 25 September 1951.
Record daily precipitation for each month at Roma Ciampino
Month
Record daily precipitation (mm)
Date
Jan
63.4 mm (2.5 in)
13 January 1978
Feb
66.0 mm (2.6 in)
26 February 1984
Mar
56.9 mm (2.2 in)
16 March 2011
Apr
48.0 mm (1.9 in)
24 April 1999
May
77.0 mm (3.0 in)
6 May 2013
Jun
94.0 mm (3.7 in)
15 June 2014
Jul
65.6 mm (2.6 in)
15 July 2002
Aug
54.2 mm (2.1 in)
28 August 2002
Sep
131.6 mm (5.2 in)
25 September 1951
Oct
120.0 mm (4.7 in)
2 October 1978
Nov
109.4 mm (4.3 in)
7 November 1997
Dec
71.2 mm (2.8 in)
11 December 2008
Period of Record Coverage
1951 to 2025
Complete yearUnder 90 percent of days
73 years of record at Roma Ciampino, 1951 to 2025. 25 years have data for under 90 percent of days and are left out of rankings: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 49 complete years at Roma Ciampino, 1951 to 2009. Blue stripes are years cooler than the station's own mean of 15.3 C (59.6 F); red stripes are warmer. The coolest year was 1980, at 14.2 C (57.6 F), and the warmest was 1994, at 16.5 C (61.6 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Roma Ciampino as warming stripes, 1951 to 2009
Year
Annual mean temperature
Difference from the station mean
1951
15.8 C
+0.46 C
1952
16.0 C
+0.62 C
1953
15.6 C
+0.26 C
1954
15.4 C
+0.01 C
1955
16.1 C
+0.77 C
1956
14.9 C
-0.41 C
1957
16.0 C
+0.64 C
1958
16.0 C
+0.66 C
1959
16.0 C
+0.67 C
1960
15.9 C
+0.60 C
1961
15.6 C
+0.25 C
1962
14.9 C
-0.47 C
1963
15.0 C
-0.35 C
1964
15.3 C
-0.04 C
1965
14.9 C
-0.43 C
1966
15.5 C
+0.16 C
1967
15.6 C
+0.24 C
1968
15.2 C
-0.18 C
1969
15.0 C
-0.35 C
1970
15.3 C
-0.04 C
1971
14.9 C
-0.45 C
1972
15.0 C
-0.32 C
1973
15.3 C
-0.06 C
1974
15.1 C
-0.29 C
1975
15.3 C
-0.06 C
1976
15.1 C
-0.28 C
1977
15.4 C
+0.09 C
1978
14.4 C
-0.93 C
1979
14.9 C
-0.42 C
1980
14.2 C
-1.13 C
1981
14.6 C
-0.73 C
1982
15.5 C
+0.19 C
1983
14.8 C
-0.52 C
1984
14.3 C
-1.06 C
1985
15.4 C
+0.03 C
1986
15.1 C
-0.27 C
1987
15.3 C
-0.02 C
1989
15.1 C
-0.20 C
1990
15.6 C
+0.26 C
1991
14.8 C
-0.59 C
1992
15.7 C
+0.35 C
1993
15.4 C
+0.04 C
1994
16.5 C
+1.13 C
1995
15.2 C
-0.19 C
1996
15.2 C
-0.14 C
1997
15.7 C
+0.38 C
1998
15.6 C
+0.21 C
2008
16.2 C
+0.83 C
2009
16.5 C
+1.11 C
The fitted trend in annual mean temperature here over 1951 to 2009 is 0.00 C (-0.10 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.19 to 0.17) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Roma Ciampino
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.00 C (-0.10 to 0.09) per decade
-0.01 F (-0.19 to 0.17) per decade
1951 to 2009
49
Not clearly different from zero
Mean daily maximum
-0.10 C (-0.20 to 0.00) per decade
-0.18 F (-0.37 to 0.01) per decade
1951 to 2009
49
Not clearly different from zero
Mean daily minimum
0.09 C (-0.04 to 0.22) per decade
0.2 F (-0.1 to 0.4) per decade
1951 to 2009
49
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
1951 to 2025
Yearly extremes at Roma Ciampino: 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)
1981
36.8 C (98.2 F)
73
Coldest night (TNn)
-11.0 C (12.2 F)
1985
-3.3 C (26.1 F)
74
Wettest day (Rx1day)
131.6 mm (5.2 in)
1951
49.2 mm (1.9 in)
71
Wettest five days (Rx5day)
262.3 mm (10.3 in)
1978
90.2 mm (3.6 in)
71
Longest dry spell (CDD)
91 days
2008
35 days
71
Hottest day (TXx)
The hottest day of the year at Roma Ciampino, 1951 to 2025. The record is 40.6 C (105.1 F) in 1981, marked on the chart; the median year is 36.8 C (98.2 F).
Hottest day (TXx) at Roma Ciampino by year
Year
Hottest day (TXx)
1951
36.2 C (97.2 F)
1952
37.7 C (99.9 F)
1953
35.8 C (96.4 F)
1954
34.6 C (94.3 F)
1955
35.8 C (96.4 F)
1956
39.0 C (102.2 F)
1957
38.3 C (100.9 F)
1958
37.4 C (99.3 F)
1959
36.0 C (96.8 F)
1960
37.5 C (99.5 F)
1961
37.3 C (99.1 F)
1962
36.4 C (97.5 F)
1963
34.5 C (94.1 F)
1964
36.1 C (97.0 F)
1965
36.7 C (98.1 F)
1966
36.8 C (98.2 F)
1967
38.2 C (100.8 F)
1968
37.0 C (98.6 F)
1969
34.4 C (93.9 F)
1970
36.0 C (96.8 F)
1971
38.0 C (100.4 F)
1972
36.8 C (98.2 F)
1973
35.0 C (95.0 F)
1974
36.6 C (97.9 F)
1975
37.0 C (98.6 F)
1976
33.4 C (92.1 F)
1977
34.2 C (93.6 F)
1978
36.4 C (97.5 F)
1979
36.8 C (98.2 F)
1980
36.4 C (97.5 F)
1981
40.6 C (105.1 F)
1982
38.4 C (101.1 F)
1983
39.4 C (102.9 F)
1984
35.2 C (95.4 F)
1985
36.8 C (98.2 F)
1986
34.0 C (93.2 F)
1987
37.4 C (99.3 F)
1988
35.8 C (96.4 F)
1989
35.0 C (95.0 F)
1990
34.8 C (94.6 F)
1991
34.8 C (94.6 F)
1992
35.2 C (95.4 F)
1993
37.0 C (98.6 F)
1994
36.6 C (97.9 F)
1995
35.6 C (96.1 F)
1996
34.0 C (93.2 F)
1997
34.2 C (93.6 F)
1998
37.8 C (100.0 F)
1999
n/a
2000
38.0 C (100.4 F)
2001
35.0 C (95.0 F)
2002
34.4 C (93.9 F)
2003
37.4 C (99.3 F)
2004
34.4 C (93.9 F)
2005
38.0 C (100.4 F)
2006
37.4 C (99.3 F)
2007
40.0 C (104.0 F)
2008
36.0 C (96.8 F)
2009
37.4 C (99.3 F)
2010
38.0 C (100.4 F)
2011
40.0 C (104.0 F)
2012
39.4 C (102.9 F)
2013
37.0 C (98.6 F)
2014
34.4 C (93.9 F)
2015
32.6 C (90.7 F)
2017
38.6 C (101.5 F)
2018
35.3 C (95.5 F)
2019
37.6 C (99.7 F)
2020
37.8 C (100.0 F)
2021
38.4 C (101.1 F)
2022
39.3 C (102.7 F)
2023
38.0 C (100.4 F)
2024
38.3 C (100.9 F)
2025
38.0 C (100.4 F)
Coldest night (TNn)
The coldest night of the year at Roma Ciampino, 1951 to 2025. The record is -11.0 C (12.2 F) in 1985, marked on the chart; the median year is -3.3 C (26.1 F).
Coldest night (TNn) at Roma Ciampino by year
Year
Coldest night (TNn)
1951
-2.0 C (28.4 F)
1952
-3.7 C (25.3 F)
1953
-3.9 C (25.0 F)
1954
-5.0 C (23.0 F)
1955
-2.1 C (28.2 F)
1956
-6.9 C (19.6 F)
1957
-2.8 C (27.0 F)
1958
-2.3 C (27.9 F)
1959
-2.2 C (28.0 F)
1960
-2.8 C (27.0 F)
1961
-4.3 C (24.3 F)
1962
-4.8 C (23.4 F)
1963
-7.4 C (18.7 F)
1964
-5.6 C (21.9 F)
1965
-6.0 C (21.2 F)
1966
-5.2 C (22.6 F)
1967
-4.6 C (23.7 F)
1968
-8.4 C (16.9 F)
1969
-4.4 C (24.1 F)
1970
-3.6 C (25.5 F)
1971
-5.6 C (21.9 F)
1972
-3.0 C (26.6 F)
1973
-5.2 C (22.6 F)
1974
-1.4 C (29.5 F)
1975
-3.2 C (26.2 F)
1976
-4.4 C (24.1 F)
1977
-3.0 C (26.6 F)
1978
-3.8 C (25.2 F)
1979
-6.2 C (20.8 F)
1980
-5.0 C (23.0 F)
1981
-5.8 C (21.6 F)
1982
-3.2 C (26.2 F)
1983
-2.8 C (27.0 F)
1984
-3.0 C (26.6 F)
1985
-11.0 C (12.2 F)
1986
-4.4 C (24.1 F)
1987
-7.0 C (19.4 F)
1988
-2.6 C (27.3 F)
1989
-1.8 C (28.8 F)
1990
-2.4 C (27.7 F)
1991
-4.0 C (24.8 F)
1992
-3.0 C (26.6 F)
1993
-6.8 C (19.8 F)
1994
-1.6 C (29.1 F)
1995
-3.4 C (25.9 F)
1996
-4.8 C (23.4 F)
1997
0.0 C (32.0 F)
1998
-3.6 C (25.5 F)
1999
-3.0 C (26.6 F)
2000
-1.2 C (29.8 F)
2001
-2.6 C (27.3 F)
2002
-4.0 C (24.8 F)
2003
-3.2 C (26.2 F)
2004
-4.0 C (24.8 F)
2005
-2.0 C (28.4 F)
2006
-3.0 C (26.6 F)
2007
-4.4 C (24.1 F)
2008
-4.0 C (24.8 F)
2009
-4.4 C (24.1 F)
2010
-3.2 C (26.2 F)
2011
-3.0 C (26.6 F)
2012
-4.0 C (24.8 F)
2013
-2.0 C (28.4 F)
2014
-1.4 C (29.5 F)
2015
-1.2 C (29.8 F)
2017
-2.7 C (27.1 F)
2018
-6.2 C (20.8 F)
2019
-3.6 C (25.5 F)
2020
-1.3 C (29.7 F)
2021
-2.8 C (27.0 F)
2022
-1.4 C (29.5 F)
2023
-1.2 C (29.8 F)
2024
-0.4 C (31.3 F)
2025
-0.2 C (31.6 F)
Wettest day (Rx1day)
The wettest day of the year at Roma Ciampino, 1951 to 2025. The record is 131.6 mm (5.2 in) in 1951, marked on the chart; the median year is 49.2 mm (1.9 in).
Wettest day (Rx1day) at Roma Ciampino by year
Year
Wettest day (Rx1day)
1951
131.6 mm (5.2 in)
1952
32.6 mm (1.3 in)
1953
36.8 mm (1.4 in)
1954
41.0 mm (1.6 in)
1955
47.4 mm (1.9 in)
1956
51.4 mm (2.0 in)
1957
34.6 mm (1.4 in)
1958
48.4 mm (1.9 in)
1959
23.6 mm (0.9 in)
1960
45.8 mm (1.8 in)
1961
70.6 mm (2.8 in)
1962
57.6 mm (2.3 in)
1963
55.6 mm (2.2 in)
1964
54.4 mm (2.1 in)
1965
52.0 mm (2.0 in)
1966
42.2 mm (1.7 in)
1967
49.4 mm (1.9 in)
1968
38.3 mm (1.5 in)
1969
33.0 mm (1.3 in)
1970
37.2 mm (1.5 in)
1971
34.4 mm (1.4 in)
1972
33.8 mm (1.3 in)
1973
52.0 mm (2.0 in)
1974
40.8 mm (1.6 in)
1975
64.8 mm (2.6 in)
1976
57.8 mm (2.3 in)
1977
47.6 mm (1.9 in)
1978
120.0 mm (4.7 in)
1979
50.0 mm (2.0 in)
1980
44.0 mm (1.7 in)
1981
57.2 mm (2.3 in)
1982
59.0 mm (2.3 in)
1983
53.0 mm (2.1 in)
1984
66.0 mm (2.6 in)
1985
45.2 mm (1.8 in)
1986
42.8 mm (1.7 in)
1987
46.2 mm (1.8 in)
1988
36.0 mm (1.4 in)
1989
46.4 mm (1.8 in)
1990
66.6 mm (2.6 in)
1991
47.4 mm (1.9 in)
1992
53.4 mm (2.1 in)
1993
48.0 mm (1.9 in)
1994
37.6 mm (1.5 in)
1995
49.2 mm (1.9 in)
1996
65.0 mm (2.6 in)
1997
109.4 mm (4.3 in)
1998
65.0 mm (2.6 in)
1999
55.0 mm (2.2 in)
2000
48.4 mm (1.9 in)
2001
53.0 mm (2.1 in)
2002
65.6 mm (2.6 in)
2003
65.2 mm (2.6 in)
2004
61.2 mm (2.4 in)
2005
64.0 mm (2.5 in)
2006
40.6 mm (1.6 in)
2007
31.6 mm (1.2 in)
2008
71.2 mm (2.8 in)
2009
16.0 mm (0.6 in)
2010
44.5 mm (1.8 in)
2011
60.5 mm (2.4 in)
2012
42.9 mm (1.7 in)
2013
77.0 mm (3.0 in)
2014
95.0 mm (3.7 in)
2015
41.9 mm (1.6 in)
2017
n/a
2018
n/a
2019
n/a
2020
39.9 mm (1.6 in)
2021
54.1 mm (2.1 in)
2022
54.1 mm (2.1 in)
2023
36.1 mm (1.4 in)
2024
58.9 mm (2.3 in)
2025
39.1 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Roma Ciampino, 1951 to 2025. The record is 262.3 mm (10.3 in) in 1978, marked on the chart; the median year is 90.2 mm (3.6 in).
Wettest five days (Rx5day) at Roma Ciampino by year
Year
Wettest five days (Rx5day)
1951
156.8 mm (6.2 in)
1952
35.8 mm (1.4 in)
1953
43.6 mm (1.7 in)
1954
55.3 mm (2.2 in)
1955
83.6 mm (3.3 in)
1956
142.5 mm (5.6 in)
1957
79.3 mm (3.1 in)
1958
124.4 mm (4.9 in)
1959
69.6 mm (2.7 in)
1960
72.4 mm (2.9 in)
1961
79.7 mm (3.1 in)
1962
86.8 mm (3.4 in)
1963
73.8 mm (2.9 in)
1964
117.4 mm (4.6 in)
1965
118.0 mm (4.6 in)
1966
91.2 mm (3.6 in)
1967
75.2 mm (3.0 in)
1968
49.7 mm (2.0 in)
1969
73.2 mm (2.9 in)
1970
90.9 mm (3.6 in)
1971
86.3 mm (3.4 in)
1972
70.0 mm (2.8 in)
1973
96.1 mm (3.8 in)
1974
103.4 mm (4.1 in)
1975
136.8 mm (5.4 in)
1976
100.0 mm (3.9 in)
1977
105.3 mm (4.1 in)
1978
262.3 mm (10.3 in)
1979
132.0 mm (5.2 in)
1980
85.4 mm (3.4 in)
1981
90.2 mm (3.6 in)
1982
122.6 mm (4.8 in)
1983
93.6 mm (3.7 in)
1984
130.2 mm (5.1 in)
1985
157.4 mm (6.2 in)
1986
99.2 mm (3.9 in)
1987
90.6 mm (3.6 in)
1988
55.7 mm (2.2 in)
1989
87.5 mm (3.4 in)
1990
151.6 mm (6.0 in)
1991
106.0 mm (4.2 in)
1992
93.6 mm (3.7 in)
1993
65.0 mm (2.6 in)
1994
64.0 mm (2.5 in)
1995
66.6 mm (2.6 in)
1996
82.6 mm (3.3 in)
1997
139.4 mm (5.5 in)
1998
121.6 mm (4.8 in)
1999
87.0 mm (3.4 in)
2000
83.8 mm (3.3 in)
2001
71.4 mm (2.8 in)
2002
98.0 mm (3.9 in)
2003
115.6 mm (4.6 in)
2004
127.6 mm (5.0 in)
2005
109.6 mm (4.3 in)
2006
73.8 mm (2.9 in)
2007
66.6 mm (2.6 in)
2008
133.6 mm (5.3 in)
2009
36.6 mm (1.4 in)
2010
50.9 mm (2.0 in)
2011
73.9 mm (2.9 in)
2012
94.9 mm (3.7 in)
2013
112.3 mm (4.4 in)
2014
204.0 mm (8.0 in)
2015
57.9 mm (2.3 in)
2017
n/a
2018
n/a
2019
n/a
2020
124.5 mm (4.9 in)
2021
109.5 mm (4.3 in)
2022
72.6 mm (2.9 in)
2023
80.1 mm (3.2 in)
2024
63.0 mm (2.5 in)
2025
43.7 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Roma Ciampino, 1951 to 2025. The record is 91 days in 2008, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Roma Ciampino by year
Year
Longest dry spell (CDD)
1951
78 days
1952
48 days
1953
52 days
1954
41 days
1955
35 days
1956
72 days
1957
25 days
1958
33 days
1959
33 days
1960
48 days
1961
49 days
1962
77 days
1963
26 days
1964
31 days
1965
56 days
1966
32 days
1967
36 days
1968
35 days
1969
33 days
1970
36 days
1971
41 days
1972
27 days
1973
41 days
1974
49 days
1975
56 days
1976
19 days
1977
40 days
1978
44 days
1979
30 days
1980
66 days
1981
29 days
1982
31 days
1983
27 days
1984
57 days
1985
45 days
1986
23 days
1987
33 days
1988
47 days
1989
36 days
1990
26 days
1991
52 days
1992
49 days
1993
85 days
1994
40 days
1995
34 days
1996
24 days
1997
28 days
1998
51 days
1999
30 days
2000
29 days
2001
22 days
2002
35 days
2003
86 days
2004
40 days
2005
22 days
2006
31 days
2007
67 days
2008
91 days
2009
8 days
2010
12 days
2011
52 days
2012
36 days
2013
22 days
2014
21 days
2015
21 days
2017
n/a
2018
n/a
2019
n/a
2020
31 days
2021
34 days
2022
32 days
2023
28 days
2024
22 days
2025
23 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
41 years with a frost
Across 41 years with a frost, the median last spring frost at Roma Ciampino falls on 7 March and the median first autumn frost on 5 December, which leaves a median of 268 days between them.
Fitted over all years, the growing season changes by +2.7 days per decade at this station.
Frost dates and growing season at Roma Ciampino
Measure
Median, all years
Earliest period
Recent period (1965 to 2009)
Recent against earliest
Fitted trend
Last spring frost
7 March
n/a
7 March
n/a
-1.4 days per decade
First autumn frost
5 December
n/a
5 December
n/a
+1.3 days per decade
Growing days
268 days
n/a
270 days
n/a
+2.7 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
62 years, 1951 to 2023
A day with at least 49.4 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 112.1 mm (4.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Roma Ciampino: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
49.4 mm (1.9 in)
5 years
64.1 mm (2.5 in)
10 years
74.7 mm (2.9 in)
25 years
88.9 mm (3.5 in)
50 years
100.2 mm (3.9 in)
100 years
112.1 mm (4.4 in)
Longer than the 62 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, 62 years of values from 1951 to 2023.
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: 131.6 mm (5.2 in) in 1951; 109.4 mm (4.3 in) in 1997; 95.0 mm (3.7 in) in 2014.
Download the Data
Data for Roma Ciampino standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Roma Ciampino 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.