América Weather in December
Average highs run from 29°C on December 1 to 32°C on December 31, and lows from 14°C to 17°C. Normal precipitation for the month is 121 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
- 30°C
- Average low
- 16°C
- Precipitation
- 121 mm
- Reanalysis high
- 41°CDec 18, 1995
- Reanalysis low
- 6°CDec 8, 2001
- Daylight
- 14 h 22 min to 14 h 31 min
- Cloud cover
- 49%
- Humidity
- 54%
- Dew point
- 12°C
- Wind
- 14.8 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 | 29°C | 14°C | 36°C 1994 | 7°C 2001 | 38% |
| Dec 2 | 29°C | 14°C | 35°C 1995 | 8°C 2018 | 36% |
| Dec 3 | 29°C | 14°C | 38°C 1995 | 8°C 2001 | 36% |
| Dec 4 | 29°C | 14°C | 37°C 1995 | 8°C 2000 | 35% |
| Dec 5 | 29°C | 14°C | 39°C 1995 | 8°C 1999 | 36% |
| Dec 6 | 29°C | 14°C | 37°C 1995 | 7°C 1999 | 36% |
| Dec 7 | 29°C | 15°C | 37°C 1994 | 8°C 1999 | 37% |
| Dec 8 | 29°C | 15°C | 38°C 1994 | 6°C 2001 | 38% |
| Dec 9 | 30°C | 15°C | 40°C 2019 | 8°C 2001 | 37% |
| Dec 10 | 30°C | 15°C | 40°C 2020 | 8°C 2005 | 37% |
| Dec 11 | 30°C | 15°C | 37°C 2015 | 9°C 2007 | 36% |
| Dec 12 | 30°C | 15°C | 38°C 1994 | 9°C 1991 | 36% |
| Dec 13 | 30°C | 15°C | 37°C 2013 | 11°C 2010 | 36% |
| Dec 14 | 30°C | 15°C | 38°C 2010 | 10°C 2016 | 36% |
| Dec 15 | 30°C | 15°C | 37°C 2010 | 11°C 2000 | 36% |
| Dec 16 | 31°C | 16°C | 39°C 2013 | 7°C 2000 | 36% |
| Dec 17 | 31°C | 16°C | 41°C 1995 | 11°C 2012 | 36% |
| Dec 18 | 31°C | 16°C | 41°C 1995 | 10°C 2018 | 36% |
| Dec 19 | 31°C | 16°C | 39°C 2003 | 11°C 2015 | 37% |
| Dec 20 | 31°C | 16°C | 39°C 2003 | 11°C 2020 | 37% |
| Dec 21 | 31°C | 16°C | 39°C 2010 | 10°C 2014 | 38% |
| Dec 22 | 31°C | 16°C | 40°C 2010 | 9°C 2014 | 37% |
| Dec 23 | 31°C | 16°C | 40°C 2013 | 9°C 2014 | 38% |
| Dec 24 | 31°C | 17°C | 39°C 1994 | 10°C 2011 | 38% |
| Dec 25 | 31°C | 17°C | 38°C 2000 | 11°C 2011 | 40% |
| Dec 26 | 31°C | 17°C | 39°C 2010 | 10°C 1991 | 39% |
| Dec 27 | 31°C | 17°C | 40°C 2010 | 11°C 2012 | 40% |
| Dec 28 | 32°C | 17°C | 38°C 2010 | 12°C 2003 | 41% |
| Dec 29 | 32°C | 17°C | 39°C 2017 | 12°C 2003 | 41% |
| Dec 30 | 32°C | 17°C | 37°C 1995 | 13°C 1999 | 42% |
| Dec 31 | 32°C | 17°C | 38°C 1994 | 11°C 2003 | 43% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- December 1
- sunrise 5:50 AM, sunset 8:12 PM
- December 31
- sunrise 5:59 AM, sunset 8:30 PM
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.