Tulum Weather in December

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

Average highs run from 28°C on December 1 to 27°C on December 31, and lows from 23°C to 22°C. Normal precipitation for the month is 59 mm over about 12 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: 27°C
Average low: 22°C
Precipitation: 59 mm
Reanalysis high: 31°CDec 19, 1995
Reanalysis low: 15°CDec 14, 2010
Daylight: 11 h 00 min to 10 h 56 min
Cloud cover: 54%
Humidity: 79%
Dew point: 21°C
Wind: 9.4 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	28°C	23°C	30°C 2004	17°C 2011	34%
Dec 2	28°C	23°C	31°C 2016	19°C 2008	36%
Dec 3	28°C	23°C	31°C 2016	18°C 2008	36%
Dec 4	28°C	23°C	30°C 2016	19°C 2010	36%
Dec 5	28°C	23°C	30°C 2016	19°C 2008	36%
Dec 6	28°C	23°C	30°C 2016	19°C 2010	37%
Dec 7	28°C	22°C	30°C 2016	17°C 2003	37%
Dec 8	28°C	22°C	30°C 2016	17°C 2003	36%
Dec 9	28°C	22°C	31°C 2016	17°C 2020	36%
Dec 10	28°C	22°C	30°C 2012	17°C 2010	36%
Dec 11	28°C	22°C	30°C 2004	16°C 2017	38%
Dec 12	28°C	22°C	30°C 2019	17°C 2008	38%
Dec 13	27°C	22°C	29°C 2009	16°C 2017	39%
Dec 14	27°C	22°C	31°C 1993	15°C 2010	38%
Dec 15	27°C	22°C	30°C 2016	17°C 2010	37%
Dec 16	27°C	22°C	30°C 2016	15°C 1997	37%
Dec 17	27°C	22°C	30°C 2019	17°C 1997	36%
Dec 18	27°C	22°C	30°C 2016	16°C 2003	36%
Dec 19	27°C	22°C	31°C 1995	16°C 2003	36%
Dec 20	27°C	22°C	30°C 2016	17°C 2003	36%
Dec 21	27°C	22°C	31°C 1994	17°C 2003	35%
Dec 22	27°C	22°C	29°C 1994	16°C 2018	34%
Dec 23	27°C	22°C	30°C 1993	19°C 2019	34%
Dec 24	27°C	22°C	30°C 2004	17°C 2019	34%
Dec 25	27°C	22°C	30°C 2004	18°C 2020	34%
Dec 26	27°C	22°C	30°C 2016	17°C 2020	33%
Dec 27	27°C	22°C	30°C 2016	15°C 2010	33%
Dec 28	27°C	22°C	30°C 2000	16°C 1999	32%
Dec 29	27°C	22°C	30°C 2016	18°C 1999	31%
Dec 30	27°C	22°C	29°C 2016	17°C 1997	32%
Dec 31	27°C	22°C	30°C 2007	18°C 2000	32%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (EST).

December 1: sunrise 7:09 AM, sunset 6:09 PM
December 31: sunrise 7:25 AM, sunset 6:21 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.