Rome
Italy
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 36 | 30 | 27 | 26 | 22 | 23 | 27 | 30 | 35 | 33 | 40 | 40 | 40 |
| Average high, °C | 23 | 17 | 12 | 8 | 7 | 8 | 11 | 15 | 20 | 24 | 27 | 27 | 17 |
| Average temperature, °C | 20 | 14 | 10 | 6 | 4 | 6 | 8 | 12 | 17 | 20 | 23 | 23 | 14 |
| Average low, °C | 16 | 12 | 8 | 4 | 2 | 3 | 5 | 8 | 13 | 16 | 19 | 19 | 10 |
| Record low, °C | 5 | 1 | -5 | -5 | -12 | -5 | -6 | 0 | 1 | 6 | 12 | 10 | -12 |
| Rain, days | 7 | 8 | 7 | 7 | 7 | 5 | 6 | 6 | 5 | 5 | 3 | 4 | 70 |
| Fog, days | 25 | 25 | 26 | 25 | 26 | 24 | 25 | 24 | 26 | 24 | 26 | 26 | 302 |
| Thunderstorms, days | 3 | 2 | 1 | 1 | 0 | 0 | 1 | 1 | 2 | 3 | 3 | 4 | 21 |
| Average precipitation, mm. | 72 | 66 | 73 | 61 | 49 | 43 | 57 | 62 | 55 | 63 | 48 | 56 | 705 |
| Relative humidity, % | 72 | 75 | 76 | 76 | 74 | 73 | 72 | 71 | 72 | 70 | 69 | 71 | 73 |
| Relative humidity morning, % | 88 | 87 | 87 | 84 | 85 | 85 | 87 | 86 | 85 | 83 | 83 | 87 | 86 |
| Relative humidity evening, % | 65 | 68 | 71 | 69 | 67 | 65 | 62 | 60 | 60 | 59 | 57 | 61 | 64 |
| Wind speed, km/h | 8 | 16 | 12 | 14 | 12 | 12 | 14 | 16 | 9 | 8 | 9 | 8 | 12 |
| Day Length, часов | 13 | 12 | 10 | 10 | 10 | 11 | 13 | 14 | 15 | 16 | 16 | 14 | 13 |
| Dew point, °C | 15 | 11 | 7 | 3 | 2 | 2 | 5 | 7 | 11 | 15 | 17 | 17 | 112 |
| Growing degree-day, °C | 275 | 129 | 0 | 0 | 0 | 0 | 0 | 42 | 198 | 292 | 396 | 396 | 1728 |
| Solar radiation, global, Mj/m2 | 15 | 9 | 6 | 4 | 6 | 9 | 13 | 15 | 20 | 22 | 24 | 20 | 14 |