Porto de Mós Weather in December

NASA POWER reanalysis for the half-degree grid cell around Porto de Mós, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 17°C on December 1 to 16°C on December 31, and lows from 14°C to 13°C. Normal precipitation for the month is 93 mm over about 9 wet days.

December day by day

The normal high and low for each date, in °C.

Normal low
Normal high
Reanalysis extreme high
Reanalysis extreme low

December at a glance

Average high: 16°C
Average low: 14°C
Precipitation: 93 mm
Reanalysis high: 20°CDec 10, 1994
Reanalysis low: 8°CDec 15, 2009
Daylight: 9 h 49 min to 9 h 40 min
Cloud cover: 52%
Humidity: 80%
Dew point: 12°C
Wind: 22.0 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

Date	Normal high	Normal low	Reanalysis high	Reanalysis low	Chance wet
Dec 1	17°C	14°C	19°C 1994	10°C 2008	32%
Dec 2	17°C	14°C	19°C 1996	9°C 1998	30%
Dec 3	17°C	14°C	19°C 1994	10°C 2010	30%
Dec 4	17°C	14°C	19°C 1994	10°C 2003	29%
Dec 5	17°C	14°C	19°C 1994	9°C 1997	29%
Dec 6	17°C	14°C	19°C 1994	10°C 2002	29%
Dec 7	17°C	14°C	19°C 2010	10°C 1996	29%
Dec 8	17°C	14°C	18°C 2009	11°C 1996	29%
Dec 9	17°C	14°C	19°C 1994	11°C 2006	29%
Dec 10	17°C	14°C	20°C 1994	10°C 2006	30%
Dec 11	17°C	14°C	19°C 1994	10°C 2008	31%
Dec 12	17°C	14°C	19°C 1998	10°C 2008	31%
Dec 13	17°C	14°C	19°C 1998	11°C 2005	31%
Dec 14	17°C	14°C	19°C 2015	9°C 2009	31%
Dec 15	17°C	14°C	19°C 2015	8°C 2009	30%
Dec 16	16°C	14°C	18°C 1998	10°C 2010	31%
Dec 17	16°C	14°C	19°C 2015	10°C 1999	32%
Dec 18	16°C	14°C	18°C 2015	10°C 1999	32%
Dec 19	16°C	14°C	19°C 2015	9°C 2009	32%
Dec 20	16°C	14°C	19°C 1995	9°C 2006	32%
Dec 21	16°C	14°C	18°C 1995	8°C 2006	32%
Dec 22	16°C	13°C	18°C 1995	10°C 2006	31%
Dec 23	16°C	13°C	19°C 2009	9°C 2006	30%
Dec 24	16°C	13°C	18°C 2002	9°C 2006	29%
Dec 25	16°C	13°C	18°C 1995	11°C 1994	29%
Dec 26	16°C	13°C	18°C 2019	10°C 2001	28%
Dec 27	16°C	13°C	19°C 1995	10°C 2004	28%
Dec 28	16°C	13°C	18°C 2015	10°C 2004	28%
Dec 29	16°C	13°C	18°C 1995	10°C 2014	28%
Dec 30	16°C	13°C	18°C 1995	10°C 1999	28%
Dec 31	16°C	13°C	18°C 1995	11°C 2011	28%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+0).

December 1: sunrise 7:29 AM, sunset 5:18 PM
December 31: sunrise 7:48 AM, sunset 5:28 PM

Every day of December: sun and moon

Other months

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.