Rome
Italy
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 37 | 36 | 27 | 22 | 20 | 22 | 27 | 27 | 32 | 37 | 38 | 40 | 40 |
| Average high, °C | 26 | 21 | 17 | 13 | 12 | 12 | 14 | 17 | 21 | 25 | 28 | 29 | 20 |
| Average temperature, °C | 22 | 18 | 14 | 11 | 10 | 10 | 11 | 14 | 17 | 21 | 24 | 24 | 16 |
| Average low, °C | 18 | 14 | 11 | 8 | 7 | 7 | 8 | 10 | 13 | 17 | 19 | 20 | 13 |
| Record low, °C | 7 | 2 | -2 | -3 | -5 | -2 | -2 | 0 | 0 | 8 | 10 | 10 | -5 |
| Fog, days | 27 | 26 | 26 | 26 | 27 | 24 | 27 | 27 | 29 | 28 | 29 | 29 | 325 |
| Thunderstorms, days | 5 | 6 | 5 | 3 | 3 | 3 | 3 | 4 | 3 | 4 | 2 | 4 | 45 |
| Average precipitation, mm. | 52 | 69 | 100 | 85 | 73 | 53 | 54 | 41 | 31 | 15 | 19 | 31 | 623 |
| Relative humidity, % | 73 | 74 | 76 | 75 | 75 | 73 | 71 | 70 | 70 | 71 | 70 | 69 | 72 |
| Relative humidity morning, % | 90 | 90 | 89 | 86 | 85 | 84 | 86 | 87 | 88 | 87 | 86 | 87 | 87 |
| Relative humidity evening, % | 60 | 64 | 68 | 67 | 64 | 62 | 61 | 60 | 59 | 58 | 55 | 56 | 61 |
| Wind speed, km/h | 12 | 12 | 8 | 12 | 12 | 16 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Day Length, часов | 13 | 12 | 10 | 10 | 10 | 11 | 12 | 14 | 15 | 16 | 15 | 14 | 13 |
| Dew point, °C | 16 | 13 | 8 | 5 | 4 | 4 | 6 | 8 | 12 | 16 | 18 | 18 | 128 |
| Growing degree-day, °C | 350 | 224 | 108 | 9 | 0 | 0 | 26 | 100 | 207 | 325 | 413 | 448 | 2209 |
| Solar radiation, global, Mj/m2 | 16 | 11 | 6 | 5 | 6 | 9 | 13 | 16 | 20 | 23 | 24 | 21 | 14 |