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Climate of Rome
From Wikipedia, the free encyclopedia
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Rome and its metropolitan area has a Mediterranean climate (Köppen climate classification: Csa),[1] with mild winters and hot summers. According to Troll-Paffen climate classification, Rome has a warm-temperate subtropical climate (Warmgemäßigt-subtropisches Zonenklima).[2] According to Siegmund/Frankenberg climate classification, Rome has a subtropical climate.[3]
Daylight
Rome is more southerly than most cities in Europe, and the duration of daylight throughout the year is more similar to Chicago or New York City (all three at approximately 40°N) than Berlin (~52°N) or Paris (48°N). Days in winter are not as short as in northern Europe, and the average duration of daylight in December, January and February is 10 hours[4] (for comparison: London[5] or Moscow[6] or Warsaw[7] – about 8 hours).
More information Month, Jan ...
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| hours of light | 10 | 11 | 12 | 13 | 15 | 15 | 15 | 14 | 12 | 11 | 10 | 9 |
| hours of Twilight/Night | 14 | 13 | 12 | 11 | 9 | 9 | 9 | 10 | 12 | 13 | 14 | 15 |
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Sunshine and UV index
Summarize
Perspective
Sunshine duration is about 2,500-2,700 hours per year, from 147 – average 4.7 hours of sunshine per day in December to 338 – average 10.9 hours of sunshine per day in July.[8] With the exception of Madrid,[9] Lisbon[10] and Athens,[11] Rome has the highest UV index between European capitals (only in the continent) and values close to that of Chicago at 41.9 °N as ultraviolet radiation is less interfered with by other geographic variables, but with a moderate annual average with index equal to 5, which allows direct exposure to the sun at some times of the year. Values range from 1 (December) to 9 (July).[12]
More information Month, Jan ...
| Climate data for Rome | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean monthly sunshine hours | 120.9 | 132.8 | 167.4 | 201.0 | 263.5 | 285.0 | 331.7 | 297.6 | 237.0 | 195.3 | 129.0 | 111.6 | 2,473 |
| Mean daily sunshine hours | 3.9 | 4.7 | 5.4 | 6.7 | 8.5 | 9.5 | 10.7 | 9.6 | 7.9 | 6.3 | 4.3 | 3.6 | 6.8 |
| Percentage possible sunshine | 46 | 45 | 57 | 53 | 60 | 63 | 73 | 73 | 66 | 59 | 43 | 37 | 57 |
| Average ultraviolet index | 2 | 2 | 4 | 6 | 7 | 8 | 9 | 8 | 6 | 4 | 2 | 1 | 5 |
| Source: Servizio Meteorologico (mean daily and monthly sunshine hours),[8] climatemps.com (percent possible sunshine)[13] and Weather Atlas (UV index)[12] | |||||||||||||
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Sea temperature
More information Jan, Feb ...
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14.2 °C (57.6 °F) | 13.6 °C (56.5 °F) | 14.0 °C (57.2 °F) | 15.3 °C (59.5 °F) | 18.7 °C (65.7 °F) | 22.7 °C (72.9 °F) | 24.4 °C (75.9 °F) | 24.6 °C (76.3 °F) | 23.5 °C (74.3 °F) | 20.7 °C (69.3 °F) | 18.6 °C (65.5 °F) | 15.8 °C (60.4 °F) | 18.9 °C (66.0 °F) |
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More information Jan, Feb ...
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14.5 °C (58.1 °F) | 13.9 °C (57.0 °F) | 14.1 °C (57.4 °F) | 15.5 °C (59.9 °F) | 18.8 °C (65.8 °F) | 22.9 °C (73.2 °F) | 24.7 °C (76.5 °F) | 25.0 °C (77.0 °F) | 24.0 °C (75.2 °F) | 21.1 °C (70.0 °F) | 19.0 °C (66.2 °F) | 16.1 °C (61.0 °F) | 19.1 °C (66.4 °F) |
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Climatic data
Recent data
1991-2020 period
More information Rome Ciampino Airport, elevation: 129 m or 423 ft, 1991-2020 normals, extremes 1944–present, Month ...
| Climate data for Rome Ciampino Airport, elevation: 129 m or 423 ft, 1991-2020 normals, extremes 1944–present | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 20.8 (69.4) |
23.0 (73.4) |
26.6 (79.9) |
30.0 (86.0) |
34.2 (93.6) |
39.3 (102.7) |
39.7 (103.5) |
40.6 (105.1) |
40.0 (104.0) |
32.0 (89.6) |
26.1 (79.0) |
21.2 (70.2) |
40.6 (105.1) |
| Mean daily maximum °C (°F) | 12.0 (53.6) |
13.0 (55.4) |
15.8 (60.4) |
18.8 (65.8) |
22.3 (72.1) |
28.1 (82.6) |
31.0 (87.8) |
31.6 (88.9) |
26.7 (80.1) |
22.2 (72.0) |
16.9 (62.4) |
12.7 (54.9) |
21.0 (69.8) |
| Daily mean °C (°F) | 7.5 (45.5) |
8.0 (46.4) |
10.7 (51.3) |
13.6 (56.5) |
18.0 (64.4) |
22.5 (72.5) |
25.1 (77.2) |
25.4 (77.7) |
21.0 (69.8) |
17.0 (62.6) |
12.4 (54.3) |
8.5 (47.3) |
15.8 (60.4) |
| Mean daily minimum °C (°F) | 3.4 (38.1) |
3.4 (38.1) |
5.9 (42.6) |
8.6 (47.5) |
12.6 (54.7) |
16.7 (62.1) |
19.3 (66.7) |
19.8 (67.6) |
16.0 (60.8) |
12.4 (54.3) |
8.5 (47.3) |
4.7 (40.5) |
10.9 (51.6) |
| Record low °C (°F) | −11.0 (12.2) |
−6.9 (19.6) |
−6.5 (20.3) |
−2.4 (27.7) |
1.8 (35.2) |
5.6 (42.1) |
9.1 (48.4) |
9.3 (48.7) |
4.3 (39.7) |
0.8 (33.4) |
−5.2 (22.6) |
−6.6 (20.1) |
−11.0 (12.2) |
| Average precipitation mm (inches) | 65.6 (2.58) |
62.8 (2.47) |
58.6 (2.31) |
68.6 (2.70) |
56.9 (2.24) |
30.1 (1.19) |
19.8 (0.78) |
30.2 (1.19) |
64.9 (2.56) |
88.1 (3.47) |
108.2 (4.26) |
98.3 (3.87) |
752.0 (29.61) |
| Average precipitation days (≥ 1.0 mm) | 7.40 | 7.48 | 6.85 | 7.42 | 5.54 | 3.38 | 2.16 | 2.20 | 6.00 | 7.32 | 8.84 | 9.44 | 74.03 |
| Average relative humidity (%) | 75.8 | 71.5 | 70.6 | 70.4 | 69.0 | 65.4 | 63.3 | 64.1 | 69.1 | 74.0 | 77.9 | 77.2 | 70.7 |
| Average dew point °C (°F) | 3.9 (39.0) |
3.5 (38.3) |
5.8 (42.4) |
8.5 (47.3) |
12.1 (53.8) |
15.1 (59.2) |
16.9 (62.4) |
17.7 (63.9) |
15.5 (59.9) |
12.9 (55.2) |
9.3 (48.7) |
5.2 (41.4) |
10.5 (50.9) |
| Mean monthly sunshine hours | 155.9 | 171.9 | 203.1 | 221.1 | 276.5 | 298.8 | 337.6 | 320.2 | 237.9 | 200.6 | 153.3 | 146.9 | 2,723.9 |
| Source 1: NOAA[16] | |||||||||||||
| Source 2: Temperature estreme in Toscana[17] | |||||||||||||
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Old data
1971-2000 period
More information Rome Ciampino Airport (altitude: 105 m sl, 13 km south-east from Colosseum satellite view), Month ...
| Climate data for Rome Ciampino Airport (altitude: 105 m sl, 13 km south-east from Colosseum satellite view) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 20.8 (69.4) |
23.0 (73.4) |
26.6 (79.9) |
30.0 (86.0) |
34.2 (93.6) |
37.8 (100.0) |
39.6 (103.3) |
40.6 (105.1) |
40.0 (104.0) |
32.0 (89.6) |
26.1 (79.0) |
21.2 (70.2) |
40.6 (105.1) |
| Mean daily maximum °C (°F) | 11.9 (53.4) |
13.0 (55.4) |
15.2 (59.4) |
17.7 (63.9) |
22.8 (73.0) |
26.9 (80.4) |
30.3 (86.5) |
30.6 (87.1) |
26.5 (79.7) |
21.4 (70.5) |
15.9 (60.6) |
12.6 (54.7) |
20.4 (68.7) |
| Daily mean °C (°F) | 7.5 (45.5) |
8.2 (46.8) |
10.2 (50.4) |
12.6 (54.7) |
17.2 (63.0) |
21.1 (70.0) |
24.1 (75.4) |
24.5 (76.1) |
20.8 (69.4) |
16.4 (61.5) |
11.4 (52.5) |
8.4 (47.1) |
15.2 (59.4) |
| Mean daily minimum °C (°F) | 3.1 (37.6) |
3.5 (38.3) |
5.2 (41.4) |
7.5 (45.5) |
11.6 (52.9) |
15.3 (59.5) |
18.0 (64.4) |
18.3 (64.9) |
15.2 (59.4) |
11.3 (52.3) |
6.9 (44.4) |
4.2 (39.6) |
10.0 (50.0) |
| Record low °C (°F) | −11.0 (12.2) |
−6.9 (19.6) |
−6.5 (20.3) |
−2.4 (27.7) |
1.8 (35.2) |
5.6 (42.1) |
9.1 (48.4) |
9.3 (48.7) |
4.3 (39.7) |
0.8 (33.4) |
−5.2 (22.6) |
−6.6 (20.1) |
−11.0 (12.2) |
| Average precipitation mm (inches) | 66.9 (2.63) |
73.3 (2.89) |
57.8 (2.28) |
80.5 (3.17) |
52.8 (2.08) |
34.0 (1.34) |
19.2 (0.76) |
36.8 (1.45) |
73.3 (2.89) |
113.3 (4.46) |
115.4 (4.54) |
81.0 (3.19) |
804.3 (31.67) |
| Average precipitation days (≥ 1 mm) | 7.0 | 7.6 | 7.6 | 9.2 | 6.2 | 4.3 | 2.1 | 3.3 | 6.2 | 8.2 | 9.7 | 8.0 | 79.4 |
| Mean monthly sunshine hours | 120.9 | 132.8 | 167.4 | 201.0 | 263.5 | 285.0 | 331.7 | 297.6 | 237.0 | 195.3 | 129.0 | 111.6 | 2,472.8 |
| Source: Servizio Meteorologico,[8] data of sunshine hours[18] (1971–2000), extremes 1944–present[19] | |||||||||||||
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More information Rome Fiumicino Airport (altitude: 15 m sl, 23 km west from Colosseum, near sea satellite view), Month ...
| Climate data for Rome Fiumicino Airport (altitude: 15 m sl, 23 km west from Colosseum, near sea satellite view) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 20.1 (68.2) |
22.1 (71.8) |
26.3 (79.3) |
28.4 (83.1) |
33.1 (91.6) |
36.5 (97.7) |
38.6 (101.5) |
37.2 (99.0) |
37.6 (99.7) |
33.6 (92.5) |
26.5 (79.7) |
20.9 (69.6) |
38.6 (101.5) |
| Mean daily maximum °C (°F) | 13.4 (56.1) |
13.9 (57.0) |
15.6 (60.1) |
17.8 (64.0) |
22.2 (72.0) |
25.9 (78.6) |
28.8 (83.8) |
29.4 (84.9) |
26.2 (79.2) |
22.1 (71.8) |
17.2 (63.0) |
14.2 (57.6) |
20.6 (69.1) |
| Daily mean °C (°F) | 8.6 (47.5) |
9.0 (48.2) |
10.7 (51.3) |
12.9 (55.2) |
17.1 (62.8) |
20.8 (69.4) |
23.6 (74.5) |
24.1 (75.4) |
21.1 (70.0) |
17.1 (62.8) |
12.4 (54.3) |
9.6 (49.3) |
15.6 (60.1) |
| Mean daily minimum °C (°F) | 3.8 (38.8) |
4.1 (39.4) |
5.7 (42.3) |
8.0 (46.4) |
11.9 (53.4) |
15.6 (60.1) |
18.3 (64.9) |
18.8 (65.8) |
16.0 (60.8) |
12.1 (53.8) |
7.7 (45.9) |
5.0 (41.0) |
10.6 (51.1) |
| Record low °C (°F) | −7.8 (18.0) |
−5.6 (21.9) |
−4.6 (23.7) |
−0.9 (30.4) |
1.6 (34.9) |
8.6 (47.5) |
10.6 (51.1) |
10.5 (50.9) |
7.8 (46.0) |
1.9 (35.4) |
−4.2 (24.4) |
−4.7 (23.5) |
−7.8 (18.0) |
| Average precipitation mm (inches) | 66.8 (2.63) |
73.3 (2.89) |
56.9 (2.24) |
68.2 (2.69) |
42.2 (1.66) |
19.4 (0.76) |
14.8 (0.58) |
30.1 (1.19) |
69.7 (2.74) |
114.2 (4.50) |
102.6 (4.04) |
82.5 (3.25) |
740.7 (29.16) |
| Average precipitation days (≥ 1 mm) | 8.2 | 8.0 | 7.1 | 7.9 | 4.2 | 2.8 | 1.5 | 2.7 | 5.1 | 7.2 | 9.2 | 7.9 | 71.8 |
| Source: Servizio Meteorologico[20] (1971–2000), extremes 1959–present (excluding the Oct. record high)[21] | |||||||||||||
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More information Rome Urbe Airport (altitude: 24 m sl, 7 km north from Colosseum satellite view), Month ...
| Climate data for Rome Urbe Airport (altitude: 24 m sl, 7 km north from Colosseum satellite view) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 20.2 (68.4) |
23.6 (74.5) |
27.0 (80.6) |
28.3 (82.9) |
33.1 (91.6) |
36.8 (98.2) |
40.0 (104.0) |
39.6 (103.3) |
37.6 (99.7) |
31.4 (88.5) |
26.0 (78.8) |
22.8 (73.0) |
40.0 (104.0) |
| Mean daily maximum °C (°F) | 12.6 (54.7) |
14.0 (57.2) |
16.5 (61.7) |
18.9 (66.0) |
23.9 (75.0) |
28.1 (82.6) |
31.5 (88.7) |
31.7 (89.1) |
27.5 (81.5) |
22.4 (72.3) |
16.5 (61.7) |
13.2 (55.8) |
21.4 (70.5) |
| Daily mean °C (°F) | 7.4 (45.3) |
8.4 (47.1) |
10.4 (50.7) |
12.9 (55.2) |
17.3 (63.1) |
21.2 (70.2) |
24.2 (75.6) |
24.5 (76.1) |
20.9 (69.6) |
16.4 (61.5) |
11.2 (52.2) |
8.2 (46.8) |
15.3 (59.5) |
| Mean daily minimum °C (°F) | 2.1 (35.8) |
2.7 (36.9) |
4.3 (39.7) |
6.8 (44.2) |
10.8 (51.4) |
14.3 (57.7) |
16.9 (62.4) |
17.3 (63.1) |
14.3 (57.7) |
10.5 (50.9) |
5.8 (42.4) |
3.1 (37.6) |
9.1 (48.4) |
| Record low °C (°F) | −9.8 (14.4) |
−6.0 (21.2) |
−9.0 (15.8) |
−2.5 (27.5) |
3.7 (38.7) |
6.2 (43.2) |
9.8 (49.6) |
8.6 (47.5) |
5.4 (41.7) |
0.0 (32.0) |
−7.2 (19.0) |
−5.4 (22.3) |
−9.8 (14.4) |
| Average precipitation mm (inches) | 69.5 (2.74) |
75.8 (2.98) |
59.0 (2.32) |
76.2 (3.00) |
49.1 (1.93) |
40.7 (1.60) |
21.0 (0.83) |
34.1 (1.34) |
71.8 (2.83) |
107.0 (4.21) |
109.9 (4.33) |
84.4 (3.32) |
798.5 (31.44) |
| Average precipitation days (≥ 1 mm) | 7.6 | 7.4 | 7.8 | 8.8 | 5.6 | 4.1 | 2.3 | 3.2 | 5.6 | 7.7 | 9.1 | 8.5 | 77.7 |
| Source: Servizio Meteorologico[22] (1971–2000) | |||||||||||||
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More information Month, Jan ...
| Climate data for Rome Ciampino Airport | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 11.5 (52.7) |
12.5 (54.5) |
15.3 (59.5) |
19.1 (66.4) |
24.1 (75.4) |
28.5 (83.3) |
31.3 (88.3) |
31.5 (88.7) |
26.9 (80.4) |
22.3 (72.1) |
17.0 (62.6) |
12.7 (54.9) |
21.1 (70.0) |
| Daily mean °C (°F) | 7.2 (45.0) |
7.6 (45.7) |
10.4 (50.7) |
13.9 (57.0) |
18.5 (65.3) |
22.8 (73.0) |
25.4 (77.7) |
25.3 (77.5) |
21.1 (70.0) |
17.0 (62.6) |
12.5 (54.5) |
8.6 (47.5) |
15.9 (60.6) |
| Mean daily minimum °C (°F) | 3.9 (39.0) |
3.7 (38.7) |
6.3 (43.3) |
9.3 (48.7) |
13.2 (55.8) |
17.1 (62.8) |
19.6 (67.3) |
19.7 (67.5) |
16.2 (61.2) |
12.7 (54.9) |
8.9 (48.0) |
5.4 (41.7) |
11.3 (52.3) |
| Average precipitation mm (inches) | 91.8 (3.61) |
83.2 (3.28) |
74.3 (2.93) |
77.9 (3.07) |
78.7 (3.10) |
45.9 (1.81) |
26.8 (1.06) |
30.8 (1.21) |
65.5 (2.58) |
78.8 (3.10) |
125.8 (4.95) |
110.6 (4.35) |
890.1 (35.04) |
| Average precipitation days (≥ 0.1 mm) | 12.9 | 11.6 | 11.6 | 13.0 | 11.0 | 9.1 | 7.1 | 6.9 | 11.0 | 11.0 | 15.0 | 13.9 | 134 |
| Mean monthly sunshine hours | 127.1 | 148.4 | 179.8 | 210.0 | 272.8 | 300.0 | 350.3 | 316.2 | 237.0 | 204.6 | 138.0 | 120.9 | 2,605 |
| Source: climatebase.ru[23] (2000-2011) | |||||||||||||
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More information Month, Jan ...
| Climate data for Civitavecchia, Metropolitan City of Rome Capital | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 12.8 (55.0) |
13.1 (55.6) |
14.6 (58.3) |
16.7 (62.1) |
20.3 (68.5) |
23.6 (74.5) |
26.5 (79.7) |
27.0 (80.6) |
24.9 (76.8) |
21.4 (70.5) |
17.0 (62.6) |
13.9 (57.0) |
19.3 (66.8) |
| Mean daily minimum °C (°F) | 7.1 (44.8) |
7.4 (45.3) |
8.5 (47.3) |
10.6 (51.1) |
14.3 (57.7) |
17.5 (63.5) |
20.3 (68.5) |
20.5 (68.9) |
18.5 (65.3) |
15.2 (59.4) |
11.1 (52.0) |
8.1 (46.6) |
13.3 (55.9) |
| Average precipitation mm (inches) | 94 (3.7) |
71 (2.8) |
51 (2.0) |
53 (2.1) |
43 (1.7) |
18 (.7) |
10 (.4) |
25 (1) |
56 (2.2) |
84 (3.3) |
89 (3.5) |
71 (2.8) |
670 (26.2) |
| Source: [24] | |||||||||||||
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1961-1990 period
More information Urbe Airport), elevation: 24 m or 79 ft, 1961-1990 normals, Month ...
| Climate data for Rome (Urbe Airport), elevation: 24 m or 79 ft, 1961-1990 normals | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 12.1 (53.8) |
13.7 (56.7) |
16.1 (61.0) |
19.2 (66.6) |
23.8 (74.8) |
27.7 (81.9) |
31.2 (88.2) |
30.9 (87.6) |
27.6 (81.7) |
22.6 (72.7) |
16.7 (62.1) |
12.8 (55.0) |
21.2 (70.2) |
| Mean daily minimum °C (°F) | 1.9 (35.4) |
3.0 (37.4) |
4.5 (40.1) |
7.1 (44.8) |
10.7 (51.3) |
14.3 (57.7) |
16.7 (62.1) |
16.9 (62.4) |
14.3 (57.7) |
10.3 (50.5) |
6.1 (43.0) |
3.0 (37.4) |
9.1 (48.3) |
| Average precipitation mm (inches) | 82.6 (3.25) |
76.0 (2.99) |
68.0 (2.68) |
68.2 (2.69) |
47.3 (1.86) |
41.0 (1.61) |
22.7 (0.89) |
36.1 (1.42) |
75.0 (2.95) |
107.7 (4.24) |
120.2 (4.73) |
92.5 (3.64) |
837.3 (32.95) |
| Average precipitation days (≥ 1.0 mm) | 8.8 | 8.1 | 8.5 | 8.1 | 5.8 | 4.3 | 2.2 | 3.2 | 5.1 | 7.2 | 9.9 | 9.5 | 80.7 |
| Average relative humidity (%) | 79 | 75 | 72 | 72 | 72 | 70 | 68 | 69 | 71 | 75 | 79 | 80 | 74 |
| Source: NOAA[25] | |||||||||||||
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More information Fiumicino Airport), elevation: 3 m or 9.8 ft, 1961-1990 normals, Month ...
| Climate data for Rome (Fiumicino Airport), elevation: 3 m or 9.8 ft, 1961-1990 normals | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 12.9 (55.2) |
13.7 (56.7) |
15.3 (59.5) |
18.0 (64.4) |
22.0 (71.6) |
25.6 (78.1) |
28.6 (83.5) |
28.7 (83.7) |
26.0 (78.8) |
22.0 (71.6) |
17.2 (63.0) |
13.9 (57.0) |
20.3 (68.6) |
| Mean daily minimum °C (°F) | 3.7 (38.7) |
4.4 (39.9) |
5.8 (42.4) |
8.3 (46.9) |
11.9 (53.4) |
15.6 (60.1) |
18.2 (64.8) |
18.4 (65.1) |
15.8 (60.4) |
12.0 (53.6) |
8.1 (46.6) |
5.1 (41.2) |
10.6 (51.1) |
| Average precipitation mm (inches) | 80.7 (3.18) |
74.9 (2.95) |
65.0 (2.56) |
54.7 (2.15) |
31.8 (1.25) |
16.3 (0.64) |
14.7 (0.58) |
33.3 (1.31) |
68.2 (2.69) |
93.4 (3.68) |
110.5 (4.35) |
89.6 (3.53) |
733.1 (28.87) |
| Average precipitation days (≥ 1.0 mm) | 8.8 | 8.1 | 8.5 | 8.1 | 5.8 | 4.3 | 2.2 | 3.2 | 5.1 | 7.2 | 9.9 | 9.5 | 80.7 |
| Average relative humidity (%) | 75 | 75 | 75 | 75 | 75 | 73 | 72 | 73 | 75 | 76 | 77 | 77 | 75 |
| Source: NOAA[26] | |||||||||||||
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