Common information
CountryGreece
Population163 688
Weather, climate, temperature by months in Piraeus
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 37 | 33 | 26 | 20 | 21 | 22 | 25 | 27 | 33 | 37 | 42 | 40 | 42 |
| Average high, °C | 28 | 23 | 19 | 15 | 14 | 14 | 16 | 19 | 24 | 29 | 32 | 32 | 22 |
| Average temperature, °C | 23 | 18 | 14 | 11 | 9 | 9 | 11 | 15 | 20 | 24 | 27 | 27 | 17 |
| Average low, °C | 20 | 16 | 12 | 9 | 7 | 7 | 8 | 11 | 16 | 20 | 23 | 23 | 14 |
| Record low, °C | 12 | 2 | 0 | 0 | -2 | -3 | -2 | 3 | 7 | 12 | 16 | 10 | -3 |
| Rain, days | 4 | 9 | 11 | 14 | 13 | 12 | 12 | 10 | 7 | 4 | 2 | 2 | 98 |
| Snow, days | 0 | 0 | 0 | 1 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 6 |
| Fog, days | 4 | 5 | 5 | 5 | 6 | 5 | 10 | 8 | 7 | 4 | 2 | 2 | 63 |
| Thunderstorms, days | 1 | 3 | 3 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 22 |
| Average precipitation, mm. | 13 | 46 | 62 | 68 | 54 | 41 | 39 | 23 | 21 | 12 | 5 | 7 | 391 |
| Relative humidity, % | 53 | 62 | 69 | 70 | 69 | 68 | 66 | 63 | 59 | 53 | 47 | 47 | 60 |
| Relative humidity morning, % | 64 | 71 | 76 | 76 | 75 | 75 | 76 | 75 | 73 | 68 | 59 | 58 | 71 |
| Relative humidity evening, % | 47 | 57 | 64 | 65 | 63 | 62 | 60 | 58 | 54 | 48 | 42 | 41 | 55 |
| Wind speed, km/h | 7 | 7 | 7 | 7 | 8 | 8 | 7 | 6 | 6 | 6 | 8 | 8 | 7 |
| Day Length, of hours | 13 | 12 | 11 | 10 | 10 | 11 | 12 | 14 | 15 | 15 | 15 | 14 | 13 |
| Dew point, °C | 13 | 11 | 8 | 6 | 3 | 3 | 5 | 8 | 11 | 14 | 14 | 14 | 110 |
| Growing degree-day, °C | 383 | 241 | 117 | 17 | 0 | 0 | 17 | 150 | 310 | 417 | 517 | 517 | 2686 |
| Solar radiation, global, Mj/m2 | 19 | 12 | 7 | 5 | 6 | 9 | 13 | 19 | 24 | 28 | 28 | 25 | 16 |