Terni Weather in December
Average highs run from 12°C on December 1 to 10°C on December 31, and lows from 4°C to 2°C. Normal precipitation for the month is 81 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
- 11°C
- Average low
- 3°C
- Precipitation
- 81 mm
- Reanalysis high
- 17°CDec 2, 2004
- Reanalysis low
- -7°CDec 30, 1996
- Daylight
- 9 h 18 min to 9 h 07 min
- Cloud cover
- 59%
- Humidity
- 85%
- Dew point
- 4°C
- Wind
- 9.0 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 | 12°C | 4°C | 16°C 2011 | -1°C 2016 | 39% |
| Dec 2 | 12°C | 4°C | 17°C 2004 | -2°C 2005 | 39% |
| Dec 3 | 12°C | 4°C | 16°C 2003 | -2°C 2012 | 40% |
| Dec 4 | 12°C | 4°C | 16°C 2003 | -2°C 2010 | 39% |
| Dec 5 | 12°C | 4°C | 17°C 2006 | -3°C 2010 | 39% |
| Dec 6 | 12°C | 3°C | 16°C 2006 | -2°C 2012 | 38% |
| Dec 7 | 12°C | 3°C | 17°C 2004 | -4°C 1998 | 37% |
| Dec 8 | 11°C | 3°C | 16°C 2011 | -3°C 1998 | 38% |
| Dec 9 | 11°C | 3°C | 16°C 2000 | -4°C 1991 | 38% |
| Dec 10 | 11°C | 3°C | 16°C 2013 | -4°C 2017 | 38% |
| Dec 11 | 11°C | 3°C | 16°C 1994 | -4°C 1991 | 37% |
| Dec 12 | 11°C | 3°C | 17°C 2003 | -4°C 1991 | 36% |
| Dec 13 | 11°C | 3°C | 15°C 2004 | -4°C 2012 | 36% |
| Dec 14 | 11°C | 2°C | 14°C 1998 | -3°C 2010 | 36% |
| Dec 15 | 11°C | 2°C | 17°C 2006 | -3°C 2007 | 36% |
| Dec 16 | 11°C | 2°C | 16°C 1998 | -6°C 2010 | 35% |
| Dec 17 | 11°C | 2°C | 16°C 2019 | -6°C 2010 | 34% |
| Dec 18 | 11°C | 2°C | 15°C 2019 | -5°C 2005 | 35% |
| Dec 19 | 10°C | 2°C | 15°C 1997 | -5°C 2005 | 36% |
| Dec 20 | 10°C | 2°C | 15°C 2020 | -6°C 2009 | 36% |
| Dec 21 | 10°C | 2°C | 16°C 2013 | -5°C 2009 | 37% |
| Dec 22 | 10°C | 2°C | 15°C 1996 | -2°C 2005 | 37% |
| Dec 23 | 10°C | 2°C | 16°C 2016 | -5°C 1999 | 36% |
| Dec 24 | 10°C | 2°C | 16°C 2009 | -4°C 1998 | 36% |
| Dec 25 | 10°C | 2°C | 16°C 2009 | -6°C 2001 | 35% |
| Dec 26 | 10°C | 2°C | 15°C 2016 | -6°C 1996 | 35% |
| Dec 27 | 10°C | 2°C | 15°C 2015 | -6°C 1996 | 36% |
| Dec 28 | 10°C | 2°C | 14°C 2015 | -6°C 1996 | 36% |
| Dec 29 | 10°C | 2°C | 13°C 1994 | -4°C 1991 | 36% |
| Dec 30 | 10°C | 2°C | 14°C 2009 | -7°C 1996 | 36% |
| Dec 31 | 10°C | 2°C | 15°C 2009 | -5°C 2014 | 35% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- December 1
- sunrise 7:19 AM, sunset 4:37 PM
- December 31
- sunrise 7:39 AM, sunset 4:46 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.