Common information
- Country
- United States
- Population
- 149 043
Weather, climate, temperature by months in Pasadena
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 38 | 36 | 32 | 29 | 29 | 31 | 36 | 34 | 38 | 39 | 40 | 41 | 41 |
| Average high, °C | 31 | 28 | 22 | 18 | 17 | 19 | 22 | 26 | 30 | 32 | 34 | 34 | 26 |
| Average temperature, °C | 27 | 22 | 17 | 13 | 12 | 14 | 17 | 21 | 25 | 28 | 29 | 29 | 21 |
| Average low, °C | 22 | 17 | 11 | 8 | 7 | 8 | 12 | 16 | 20 | 23 | 24 | 24 | 16 |
| Record low, °C | 10 | 1 | -4 | -13 | -12 | -10 | -6 | -6 | 7 | 13 | 7 | 18 | -13 |
| Rain, days | 5 | 4 | 4 | 5 | 4 | 5 | 2 | 5 | 4 | 3 | 5 | 6 | 52 |
| Snow, days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Snowfall, cm. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Average precipitation, mm. | 129 | 125 | 107 | 99 | 97 | 83 | 75 | 89 | 121 | 153 | 116 | 113 | 1307 |
| Relative humidity, % | 74 | 75 | 75 | 74 | 74 | 73 | 73 | 74 | 75 | 76 | 76 | 75 | 74 |
| Wind speed, km/h | 11 | 12 | 13 | 14 | 15 | 15 | 15 | 14 | 13 | 11 | 10 | 9 | 12 |
| Day Length, часов | 13 | 12 | 11 | 11 | 11 | 12 | 12 | 13 | 14 | 15 | 14 | 14 | 13 |
| Dew point, °C | 21 | 16 | 10 | 8 | 8 | 9 | 11 | 15 | 19 | 22 | 23 | 23 | 185 |
| Growing degree-day, °C | 901 | 687 | 402 | 227 | 189 | 232 | 420 | 596 | 838 | 960 | 1048 | 1058 | 7558 |
| Solar radiation, global, Mj/m2 | 18 | 15 | 11 | 9 | 10 | 12 | 15 | 19 | 20 | 21 | 22 | 20 | 16 |