| World Facts Index > Portugal > Geography > Weather > Cascais |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 58 | 60 | 64 | 66 | 71 | 76 | 81 | 82 | 78 | 72 | 64 | 58 |
| Avg. Low | 46 | 48 | 48 | 52 | 55 | 60 | 64 | 64 | 62 | 58 | 52 | 48 |
| Mean | 54 | 54 | 57 | 58 | 64 | 68 | 72 | 74 | 71 | 65 | 58 | 54 |
| Avg. Precip. | 4.3 in | 4.4 in | 2.7 in | 2.5 in | 1.5 in | 0.8 in | 0.3 in | 0.3 in | 1.0 in | 3.3 in | 4.5 in | 4.3 in |
Fahrenheit temperature scale is used.