Pio IX Weather in December

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

Average highs run from 35°C on December 1 to 33°C on December 31, and lows from 23°C to 22°C. Normal precipitation for the month is 59 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: 34°C
Average low: 22°C
Precipitation: 59 mm
Reanalysis high: 39°CDec 9, 1994
Reanalysis low: 18°CDec 21, 2000
Daylight: 12 h 29 min to 12 h 31 min
Cloud cover: 57%
Humidity: 52%
Dew point: 16°C
Wind: 15.8 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	35°C	23°C	38°C 2015	20°C 1995	26%
Dec 2	35°C	22°C	38°C 2015	21°C 1996	26%
Dec 3	35°C	22°C	38°C 2004	21°C 1994	27%
Dec 4	35°C	22°C	38°C 2007	21°C 2009	27%
Dec 5	35°C	22°C	38°C 2002	21°C 1996	26%
Dec 6	35°C	22°C	39°C 2002	21°C 2018	26%
Dec 7	35°C	22°C	38°C 1997	20°C 2018	28%
Dec 8	35°C	22°C	38°C 2015	20°C 2018	28%
Dec 9	35°C	22°C	39°C 1994	20°C 2005	29%
Dec 10	35°C	22°C	38°C 1994	19°C 2005	31%
Dec 11	35°C	22°C	38°C 2015	20°C 2005	31%
Dec 12	35°C	22°C	38°C 2015	20°C 2018	31%
Dec 13	35°C	22°C	38°C 2015	19°C 2018	31%
Dec 14	34°C	22°C	38°C 2015	19°C 2005	31%
Dec 15	34°C	22°C	38°C 2015	20°C 2018	32%
Dec 16	34°C	22°C	38°C 2015	19°C 2000	32%
Dec 17	34°C	22°C	37°C 1994	19°C 2010	32%
Dec 18	34°C	22°C	38°C 1994	19°C 2010	31%
Dec 19	34°C	22°C	38°C 1994	19°C 2010	30%
Dec 20	34°C	22°C	37°C 2004	20°C 2018	31%
Dec 21	34°C	22°C	37°C 1993	18°C 2000	32%
Dec 22	34°C	22°C	38°C 2019	21°C 2000	32%
Dec 23	34°C	22°C	37°C 2019	21°C 2005	33%
Dec 24	34°C	22°C	38°C 2019	20°C 1999	34%
Dec 25	34°C	22°C	39°C 2019	20°C 2000	34%
Dec 26	34°C	22°C	37°C 2001	19°C 2000	36%
Dec 27	34°C	22°C	38°C 2016	20°C 2018	37%
Dec 28	33°C	22°C	37°C 2019	19°C 2018	39%
Dec 29	33°C	22°C	37°C 2017	20°C 2005	40%
Dec 30	33°C	22°C	37°C 2012	20°C 2018	42%
Dec 31	33°C	22°C	37°C 2017	20°C 1994	44%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT-3).

December 1: sunrise 5:17 AM, sunset 5:46 PM
December 31: sunrise 5:30 AM, sunset 6:01 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.