Genzano di Roma Weather in December
Average highs run from 14°C on December 1 to 12°C on December 31, and lows from 6°C to 4°C. Normal precipitation for the month is 104 mm over about 12 wet days.
December day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 13°C
- Average low
- 5°C
- Precipitation
- 104 mm
- Record high
- 21°CDec 24, 2002
- Record low
- -6°CDec 6, 1964
- Daylight
- 9 h 23 min to 9 h 12 min
- Cloud cover
- 57%
- Humidity
- 76%
- Dew point
- 8°C
- Wind
- 17.6 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 | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 14°C | 6°C | 20°C 2014 | -3°C 1957 | 46% |
| Dec 2 | 14°C | 6°C | 20°C 1954 | -2°C 1957 | 46% |
| Dec 3 | 14°C | 6°C | 19°C 1963 | -1°C 1989 | 48% |
| Dec 4 | 6°C | 20°C 1963 | -2°C 1990 | 48% | |
| Dec 5 | 14°C | 6°C | 20°C 2003 | -3°C 1980 | 47% |
| Dec 6 | 14°C | 5°C | 18°C 1961 | -6°C 1964 | 46% |
| Dec 7 | 5°C | 19°C 2004 | -2°C 1962 | 45% | |
| Dec 8 | 14°C | 5°C | 20°C 2010 | -3°C 1962 | 45% |
| Dec 9 | 13°C | 5°C | 19°C 2004 | -4°C 1998 | 46% |
| Dec 10 | 13°C | 6°C | 18°C 1953 | -5°C 1980 | 45% |
| Dec 11 | 13°C | 5°C | 17°C 1953 | -1°C 1991 | 44% |
| Dec 12 | 13°C | 4°C | 18°C 1953 | -3°C 1973 | 43% |
| Dec 13 | 13°C | 4°C | 19°C 2011 | -3°C 1991 | 44% |
| Dec 14 | 13°C | 6°C | 17°C 1955 | -3°C 1991 | 43% |
| Dec 15 | 13°C | 5°C | 18°C 1953 | -2°C 1991 | 41% |
| Dec 16 | 4°C | 20°C 1989 | -4°C 2007 | 40% | |
| Dec 17 | 5°C | 20°C 1989 | -4°C 1961 | 40% | |
| Dec 18 | 12°C | 4°C | 20°C 1989 | -4°C 1971 | 38% |
| Dec 19 | 12°C | 2°C | 19°C 1989 | -3°C 1977 | 38% |
| Dec 20 | 12°C | 5°C | 17°C 1958 | -3°C 2009 | 38% |
| Dec 21 | 12°C | 4°C | 18°C 1979 | -4°C 2009 | 38% |
| Dec 22 | 5°C | 18°C 1996 | -3°C 1977 | 38% | |
| Dec 23 | 13°C | 5°C | 20°C 2010 | -4°C 1986 | 37% |
| Dec 24 | 5°C | 21°C 2002 | -4°C 1970 | 36% | |
| Dec 25 | 12°C | 5°C | 18°C 2009 | -3°C 1986 | 35% |
| Dec 26 | 12°C | 5°C | 17°C 2012 | -4°C 1986 | 36% |
| Dec 27 | 11°C | 4°C | 17°C 1961 | -4°C 1956 | 36% |
| Dec 28 | 11°C | 3°C | 17°C 1961 | -5°C 1996 | 36% |
| Dec 29 | 12°C | 3°C | 17°C 1962 | -3°C 1956 | 35% |
| Dec 30 | 11°C | 3°C | 17°C 2009 | -3°C 1996 | 36% |
| Dec 31 | 12°C | 4°C | 19°C 1981 | -3°C 1968 | 35% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- December 1
- sunrise 7:17 AM, sunset 4:40 PM
- December 31
- sunrise 7:36 AM, sunset 4:48 PM
Other months
Sources
Records: NOAA GHCN-Daily, station IT000016239, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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.