Usulután Weather in December
Average highs run from 32°C on December 1 to 33°C on December 31, and lows from 22°C to 22°C. Normal precipitation for the month is 9 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
- 32°C
- Average low
- 22°C
- Precipitation
- 9 mm
- Reanalysis high
- 37°CDec 12, 1994
- Reanalysis low
- 15°CDec 15, 2010
- Daylight
- 11 h 24 min to 11 h 22 min
- Cloud cover
- 24%
- Humidity
- 64%
- Dew point
- 19°C
- Wind
- 10.8 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 | 32°C | 22°C | 36°C 1994 | 18°C 2011 | 10% |
| Dec 2 | 32°C | 22°C | 36°C 1994 | 19°C 2011 | 9% |
| Dec 3 | 32°C | 22°C | 35°C 1992 | 18°C 1999 | 8% |
| Dec 4 | 32°C | 22°C | 35°C 1992 | 19°C 2007 | 8% |
| Dec 5 | 32°C | 22°C | 36°C 1993 | 19°C 2007 | 8% |
| Dec 6 | 32°C | 22°C | 36°C 1994 | 20°C 2006 | 8% |
| Dec 7 | 32°C | 22°C | 36°C 1993 | 20°C 2010 | 9% |
| Dec 8 | 32°C | 22°C | 35°C 1992 | 19°C 2003 | 9% |
| Dec 9 | 32°C | 22°C | 36°C 2001 | 18°C 2011 | 9% |
| Dec 10 | 32°C | 22°C | 35°C 2001 | 18°C 2010 | 9% |
| Dec 11 | 32°C | 22°C | 36°C 1994 | 18°C 2010 | 10% |
| Dec 12 | 32°C | 22°C | 37°C 1994 | 18°C 2008 | 9% |
| Dec 13 | 32°C | 22°C | 35°C 1994 | 18°C 2008 | 10% |
| Dec 14 | 32°C | 22°C | 36°C 1994 | 18°C 2010 | 10% |
| Dec 15 | 32°C | 22°C | 36°C 1994 | 15°C 2010 | 9% |
| Dec 16 | 32°C | 22°C | 36°C 1994 | 18°C 1997 | 9% |
| Dec 17 | 32°C | 22°C | 35°C 1994 | 19°C 2010 | 8% |
| Dec 18 | 32°C | 22°C | 36°C 1994 | 19°C 2010 | 8% |
| Dec 19 | 32°C | 22°C | 35°C 1996 | 19°C 2020 | 7% |
| Dec 20 | 32°C | 22°C | 36°C 2001 | 19°C 2003 | 7% |
| Dec 21 | 32°C | 22°C | 36°C 2001 | 20°C 2008 | 6% |
| Dec 22 | 32°C | 22°C | 35°C 1994 | 19°C 2009 | 5% |
| Dec 23 | 32°C | 22°C | 35°C 2004 | 18°C 2010 | 5% |
| Dec 24 | 32°C | 22°C | 35°C 1992 | 19°C 2012 | 4% |
| Dec 25 | 33°C | 22°C | 35°C 1992 | 19°C 1999 | 4% |
| Dec 26 | 33°C | 22°C | 36°C 1992 | 19°C 2020 | 4% |
| Dec 27 | 33°C | 22°C | 36°C 1992 | 19°C 2020 | 4% |
| Dec 28 | 33°C | 22°C | 36°C 1992 | 18°C 1999 | 3% |
| Dec 29 | 33°C | 22°C | 35°C 1991 | 17°C 1999 | 3% |
| Dec 30 | 33°C | 22°C | 34°C 1996 | 18°C 1999 | 3% |
| Dec 31 | 33°C | 22°C | 34°C 1993 | 19°C 1999 | 3% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 6:01 AM, sunset 5:25 PM
- December 31
- sunrise 6:16 AM, sunset 5:38 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.