Cascais Weather: December
 |
Average Day Temperature: | 62.2°F |
|
Average Night Temperature: | 57.3°F |
|
Sea Water Temperature: | 61.3°F |
|
Number of Sunny Days: | 14 days |
| Sunshine Hours: | 9.5 - 9.7 hours | |
|
Number of Rainy Days: | 4 days |
| Precipitation Totals: | 2.1 in | |
| detailed information | ||
forecast
| Cascais |
Temperature
| Cascais |
Air Temperature in December, °F
The highest day temperature in December 2025 was 64°F. The lowest night temperature was 46°F. The average values for day and night temperatures during December were 58.6°F и 54.8°F respectivly.
Cascais Water Sea Temperature in December, °F
The average sea surface temperature in December 2025 for Cascais was 60.7°F. The maximum and minimum values were 58.0°F and 61.8°F respectively.
Most of the days in December are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in December, in
Precipitation total in December for Cascais is 2.1 in. It makes december one of the most rainy months of the year.
The average wind speed in December is 12.1 mph. This value is relatively stable throughout the year.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Cascais in December is 5.9 hours.
Cascais on the Weather Map
| Albufeira |  |
+52 |
| Algarve | |
+54 |
| Cascais |  |
+58 |
| Faro | |
+54 |
| Funchal |  |
+54 |
| Lagos | |
+56 |
| Lisbon | |
+58 |
| Madeira | |
+54 |
| Ponta Delgada | |
+62 |
| Portimao |  |
+54 |
| Porto |  |
+52 |
| Porto Santo Island | |
+62 |
| Quarteira | |
+52 |
| Sao Miguel | |
+62 |
| Terceira Island | |
+60 |
| 0900 |  |
58°F | S 12 mph |
| 1200 |  |
58°F | SE 14 mph |
| 1500 | |
58°F | SE 14 mph |
| 1800 |  |
56°F | S 14 mph |
| 2100 | |
56°F | S 12 mph |
| 0000 |  |
56°F | S 11 mph |
| 0300 | |
54°F | S 10 mph |
| 0600 | |
54°F | S 9 mph |