Umán Weather in December

NASA POWER reanalysis for the half-degree grid cell around Umán, 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 20°C to 19°C. Normal precipitation for the month is 40 mm over about 6 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: 19°C
Precipitation: 40 mm
Reanalysis high: 35°CDec 5, 2016
Reanalysis low: 12°CDec 15, 2010
Daylight: 10 h 58 min to 10 h 54 min
Cloud cover: 50%
Humidity: 74%
Dew point: 18°C
Wind: 4.7 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	20°C	34°C 2016	16°C 2011	19%
Dec 2	29°C	20°C	35°C 2018	14°C 1992	19%
Dec 3	29°C	20°C	35°C 2016	13°C 2008	19%
Dec 4	29°C	20°C	34°C 2016	15°C 2010	19%
Dec 5	29°C	20°C	35°C 2016	15°C 2008	18%
Dec 6	29°C	20°C	34°C 2016	17°C 2000	19%
Dec 7	29°C	20°C	35°C 2016	15°C 2000	20%
Dec 8	29°C	20°C	34°C 2016	13°C 2010	20%
Dec 9	29°C	20°C	34°C 2004	15°C 2011	20%
Dec 10	29°C	19°C	34°C 2012	14°C 2020	21%
Dec 11	29°C	19°C	34°C 2012	13°C 2010	22%
Dec 12	29°C	19°C	33°C 2000	14°C 2018	22%
Dec 13	29°C	19°C	33°C 2003	15°C 2004	22%
Dec 14	29°C	19°C	33°C 2015	14°C 2017	22%
Dec 15	29°C	19°C	33°C 2019	12°C 2010	22%
Dec 16	29°C	19°C	34°C 2019	14°C 2002	22%
Dec 17	29°C	19°C	34°C 2019	13°C 1997	21%
Dec 18	29°C	19°C	33°C 2016	15°C 1997	20%
Dec 19	29°C	19°C	34°C 2012	15°C 1996	19%
Dec 20	29°C	19°C	34°C 2012	14°C 2010	19%
Dec 21	29°C	19°C	33°C 2017	13°C 2003	18%
Dec 22	29°C	19°C	33°C 1993	14°C 2003	17%
Dec 23	29°C	19°C	33°C 2017	13°C 2018	17%
Dec 24	29°C	19°C	33°C 2015	16°C 2003	17%
Dec 25	29°C	19°C	33°C 1997	17°C 2019	17%
Dec 26	29°C	19°C	33°C 1997	16°C 2020	17%
Dec 27	29°C	19°C	33°C 2008	14°C 2005	17%
Dec 28	29°C	19°C	35°C 2012	12°C 2010	17%
Dec 29	29°C	19°C	33°C 2015	15°C 2010	17%
Dec 30	29°C	19°C	33°C 2015	16°C 1997	17%
Dec 31	29°C	19°C	34°C 2010	13°C 1997	17%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (CST).

December 1: sunrise 6:19 AM, sunset 5:17 PM
December 31: sunrise 6:35 AM, sunset 5:29 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.