Guantánamo Weather in December

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

Average highs run from 29°C on December 1 to 29°C on December 31, and lows from 24°C to 23°C. Normal precipitation for the month is 25 mm over about 3 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: 29°C
Average low: 23°C
Precipitation: 25 mm
Reanalysis high: 33°CDec 6, 2003
Reanalysis low: 18°CDec 28, 2010
Daylight: 11 h 00 min to 10 h 56 min
Cloud cover: 48%
Humidity: 74%
Dew point: 20°C
Wind: 18.7 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	29°C	24°C	31°C 1997	22°C 2001	17%
Dec 2	29°C	24°C	31°C 1997	21°C 1999	16%
Dec 3	29°C	24°C	32°C 2009	21°C 1999	15%
Dec 4	29°C	24°C	32°C 2018	21°C 2010	16%
Dec 5	29°C	24°C	32°C 2018	20°C 2010	16%
Dec 6	29°C	24°C	33°C 2003	20°C 2010	15%
Dec 7	29°C	24°C	31°C 2016	20°C 2010	15%
Dec 8	29°C	24°C	31°C 2002	19°C 2010	14%
Dec 9	29°C	24°C	31°C 1997	21°C 1996	13%
Dec 10	29°C	23°C	31°C 2009	21°C 1996	12%
Dec 11	29°C	23°C	32°C 1997	21°C 1996	11%
Dec 12	29°C	23°C	31°C 1997	20°C 2010	12%
Dec 13	29°C	23°C	31°C 1997	20°C 2010	13%
Dec 14	29°C	23°C	32°C 2019	18°C 2010	13%
Dec 15	29°C	23°C	32°C 2019	18°C 2010	13%
Dec 16	29°C	23°C	31°C 2013	19°C 2010	14%
Dec 17	29°C	23°C	32°C 2018	19°C 1997	14%
Dec 18	29°C	23°C	31°C 2003	21°C 1993	13%
Dec 19	29°C	23°C	30°C 2018	21°C 1996	13%
Dec 20	29°C	23°C	30°C 2019	19°C 2010	13%
Dec 21	29°C	23°C	31°C 1995	20°C 2010	13%
Dec 22	29°C	23°C	30°C 2020	20°C 2010	14%
Dec 23	29°C	23°C	30°C 1997	19°C 2010	14%
Dec 24	29°C	23°C	31°C 1997	18°C 2010	14%
Dec 25	29°C	23°C	31°C 2020	21°C 2010	15%
Dec 26	29°C	23°C	31°C 1997	19°C 1995	15%
Dec 27	29°C	23°C	31°C 1997	18°C 2010	14%
Dec 28	29°C	23°C	31°C 1997	18°C 2010	14%
Dec 29	29°C	23°C	31°C 1998	19°C 2010	13%
Dec 30	29°C	23°C	31°C 2012	19°C 2010	13%
Dec 31	29°C	23°C	30°C 2007	20°C 2010	12%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT-5).

December 1: sunrise 6:20 AM, sunset 5:20 PM
December 31: sunrise 6:36 AM, sunset 5:32 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.