Rome
Italy
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 31 | 26 | 20 | 15 | 17 | 20 | 24 | 30 | 31 | 34 | 35 | 35 | 35 |
| Average high, °C | 24 | 17 | 10 | 5 | 4 | 7 | 12 | 17 | 22 | 26 | 28 | 27 | 17 |
| Average temperature, °C | 18 | 13 | 6 | 2 | 1 | 3 | 8 | 12 | 17 | 21 | 23 | 22 | 12 |
| Average low, °C | 13 | 8 | 3 | 0 | -1 | 0 | 3 | 6 | 11 | 15 | 17 | 16 | 8 |
| Record low, °C | 5 | 0 | -5 | -13 | -15 | -15 | -7 | -2 | 4 | 5 | 10 | 9 | -15 |
| Rain, days | 7 | 9 | 8 | 8 | 7 | 7 | 6 | 7 | 7 | 7 | 7 | 7 | 87 |
| Fog, days | 28 | 30 | 29 | 29 | 29 | 26 | 29 | 28 | 30 | 28 | 29 | 28 | 343 |
| Thunderstorms, days | 5 | 2 | 0 | 0 | 0 | 0 | 1 | 4 | 8 | 10 | 9 | 10 | 49 |
| Average precipitation, mm. | 83 | 115 | 105 | 75 | 63 | 59 | 72 | 84 | 98 | 81 | 68 | 79 | 982 |
| Relative humidity, % | 77 | 84 | 86 | 92 | 86 | 80 | 77 | 72 | 73 | 70 | 73 | 74 | 79 |
| Relative humidity morning, % | 92 | 93 | 92 | 91 | 91 | 91 | 89 | 88 | 89 | 88 | 88 | 90 | 90 |
| Relative humidity evening, % | 59 | 66 | 68 | 68 | 68 | 61 | 55 | 55 | 58 | 57 | 55 | 55 | 60 |
| Wind speed, km/h | 8 | 8 | 9 | 8 | 9 | 9 | 14 | 14 | 9 | 8 | 8 | 8 | 9 |
| Monthly sunshine, часов | 168 | 132 | 98 | 108 | 107 | 112 | 152 | 159 | 153 | 198 | 222 | 210 | 1819 |
| Day Length, часов | 13 | 11 | 10 | 9 | 10 | 11 | 13 | 14 | 16 | 16 | 16 | 15 | 13 |
| Dew point, °C | 13 | 10 | 4 | 2 | 0 | -1 | 2 | 6 | 11 | 14 | 16 | 16 | 93 |
| Growing degree-day, °C | 250 | 69 | 0 | 0 | 0 | 0 | 0 | 33 | 189 | 308 | 379 | 344 | 1573 |
| Atmosphere pressure, bar | 974 | 975 | 975 | 975 | 977 | 975 | 974 | 971 | 973 | 973 | 973 | 973 | 11689 |
| Solar radiation, global, Mj/m2 | 14 | 9 | 6 | 5 | 6 | 9 | 14 | 16 | 19 | 22 | 22 | 19 | 13 |