December 2012 was the third driest December on record with only 42.6mm of rainfall compared to the mean monthly of 105.3mm. The driest December was that of 2010 with only 26.5mm. The wettest December 2007 with 229.9mm. Thunder was heard on three days and hail seen on two occasions.
The mean monthly temperature of 14.4°C was 0.3°C below the mean monthly of 14.7°C. The warmest December ever was in 1989 with a mean monthly temperature of 16.2°C while the coldest ever was in 1991 with a mean monthly temperature of 12.4°C.
The hottest day in December 2012 was on the 15th with a high of 21.0°C. The hottest December day ever recorded was of 24.9°C in 1987. The coldest night in December 2012 was of 6.8°C on the 13th. The coldest December night ever recorded was of 3.8°C in 1988.
The wind blew mainly from the west with an average wind speed at Zebbug Malta of 7.8km/h. The strongest gust at Zebbug was of 70.3km/h on the 3rd. A much stronger gust of 96.2km/h was registered at Mellieha on the 5th.
The mean monthly sea-level pressure was 1017.4hPa, with the highest of 1025.7hPa occurring on Christmas Day and the lowest of 1005.8hPa occurring on the 8th.