Sines in december: average Weather, Temperature and Climate
Weather in Sines in december 2026
The weather in Sines in december comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout december
good weather
Weather at 6am
58°F
Clear/Sunny
49% of time
21%
16%
9%
Weather at 12pm
61°F
Clear/Sunny
50% of time
24%
11%
11%
Weather at 6pm
59°F
Clear/Sunny
52% of time
19%
14%
9%
Weather at 3am
58°F
52%
19%
16%
10%
Evolution of daily average temperature and precipitation in Sines in december
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Sines in december.
The climate of Sines in december is good
the weather in Sines in december is quite dry (with 4.1in of precipitation over 5 days). The weather is better from the previous month since in november it receives an average of 4.3in of rainfall over 6 days.
The climate is fairly cool in that area this month, but it is tolerable when dressing cosy. The high seasonal norm is 63°F. The seasonal minimum is 56°F. Thus, the mean temperature average in december in Sines is 59°F. These temperatures are far removed from those records observed in Sines in december with a maximum record of 74°F in 2021 and a minimum record of 40°F in 2009. You can plan to have about 6 days with temperatures above 65°F, or 19% of time.
Day length in Sines in december is 09:33. The sun rises at 07:44 and sets at 17:17.
With a good weather, december is a good month to go in that area.
Seasonal average climate and temperature of Sines in december
Check below seasonal norms These datas are set from the weather statements earlier years of december.
| December | |||||
| Outside temperature | |||||
| Average temperature | 59°F | ||||
| Highest temperature | 63°F | ||||
| Lowest temperature | 56°F | ||||
| Highest record temperature | 74°F (2021) | ||||
| Lowest record temperature | 40°F (2009) | ||||
| Number of days at +65°F | 6 day(s) (19%) | ||||
| Sea temperature | |||||
| Average sea temperature | 63°F | ||||
| Lowest sea temperature | 62°F | ||||
| Highest sea temperature | 64°F | ||||
| Wind | |||||
| Wind speed | 23km/h | ||||
| Wind temperature | 54°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.1in | ||||
| Number of days with rainfall | 5 day(s) (16%) | ||||
| Record daily rainfall | 2.5in (2019) | ||||
| Other climate data | |||||
| Humidity | 79% | ||||
| Visibility | 9.65km | ||||
| Cloud cover | 33% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 8 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 07:44 | ||||
| Time of sunset | 17:17 | ||||
| Length of day | 09:33 | ||||
| Our opinion about the weather in december | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last december?
Here is the day by day recorded weather in Sines in december 2025:
50°F to 58°F
58°F to 59°F
56°F to 59°F
59°F to 61°F
61°F to 63°F
61°F to 63°F
59°F to 63°F
56°F to 65°F
61°F to 63°F
58°F to 59°F
54°F to 59°F
56°F to 58°F
54°F to 63°F
52°F to 61°F
56°F to 59°F
54°F to 56°F
54°F to 59°F
52°F to 61°F
56°F to 58°F
54°F to 59°F
54°F to 58°F
52°F to 58°F
56°F to 59°F
50°F to 54°F
49°F to 54°F
50°F to 54°F
49°F to 54°F
50°F to 58°F
49°F to 56°F
50°F to 58°F
49°F to 59°F
Map: other cities in Portugal in december
Cities near Sines:
| Porto Covo in december | good weather |
| Vila Nova de Milfontes in december | good weather |
| Grandola in december | good weather |
| Sao Teotonio in december | tolerable weather |
| Sesimbra in december | good weather |
| Aljustrel in december | tolerable weather |
| Setúbal in december | good weather |
| Aljezur in december | tolerable weather |
| Praia da Arrifana in december | good weather |
| Monchique in december | tolerable weather |
| Costa da Caparica in december | good weather |
| Montijo in december | good weather |
Click over cities on the map for information about the weather in december.
Sines
perfect weather
good
tolerable
bad
very bad
Weather data for Sines in december:
Weather data for Sines for december are derived from an average of the weather forecast since 2009 in Sines. There is a margin of error and these forecasts are to be considered as general information only. The weather in Sines can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Sines.