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 | 22 | 18 | 17 | 21 | 24 | 30 | 32 | 37 | 40 | 40 | 40 |
| Average high, °C | 27 | 20 | 14 | 10 | 9 | 11 | 15 | 20 | 23 | 28 | 31 | 31 | 20 |
| Average temperature, °C | 20 | 15 | 9 | 6 | 5 | 6 | 9 | 13 | 17 | 21 | 24 | 23 | 14 |
| Average low, °C | 14 | 10 | 5 | 2 | 1 | 2 | 4 | 7 | 11 | 14 | 17 | 16 | 9 |
| Record low, °C | 5 | 0 | -5 | -7 | -7 | -7 | -11 | -2 | 2 | 6 | 7 | 10 | -11 |
| Rain, days | 7 | 8 | 8 | 8 | 6 | 6 | 6 | 7 | 7 | 6 | 4 | 5 | 78 |
| Fog, days | 8 | 10 | 12 | 13 | 12 | 10 | 9 | 8 | 7 | 6 | 7 | 7 | 109 |
| Thunderstorms, days | 5 | 6 | 3 | 2 | 1 | 1 | 2 | 4 | 3 | 3 | 3 | 5 | 38 |
| Average precipitation, mm. | 80 | 100 | 90 | 70 | 40 | 50 | 60 | 70 | 70 | 60 | 30 | 40 | 760 |
| Relative humidity, % | 71 | 76 | 81 | 81 | 76 | 75 | 72 | 72 | 72 | 71 | 64 | 66 | 73 |
| Relative humidity morning, % | 90 | 88 | 87 | 85 | 86 | 84 | 85 | 87 | 89 | 88 | 89 | 89 | 87 |
| Relative humidity evening, % | 57 | 61 | 64 | 66 | 63 | 57 | 58 | 59 | 59 | 56 | 53 | 53 | 59 |
| Wind speed, km/h | 9 | 12 | 12 | 9 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Day Length, часов | 13 | 12 | 10 | 10 | 10 | 11 | 13 | 14 | 15 | 16 | 16 | 14 | 13 |
| Dew point, °C | 14 | 11 | 6 | 3 | 1 | 2 | 4 | 8 | 12 | 15 | 16 | 16 | 108 |
| Growing degree-day, °C | 325 | 172 | 0 | 0 | 0 | 0 | 0 | 117 | 241 | 350 | 448 | 431 | 2083 |
| Solar radiation, global, Mj/m2 | 15 | 9 | 6 | 5 | 6 | 9 | 13 | 16 | 20 | 23 | 24 | 20 | 14 |