December 2019 was warmer than average (5.25°C versus an average of 4.80), wetter than average (59.00 mm versus an average total of 50.82) and windier than average (a wind run of 3608 miles versus an average of 3328).
The highest temperature in the month was 11.8°C recorded at 13:33 on the 6th, 0.4°C below the December mean.. The lowest temperature was -1.9°C recorded at 02:35 on the 2nd, 1.3°C below the mean and the lowest temperature of the Winter season so far. The monthly average temperature was 5.2°C, 0.4°C above the December average. The average daily high temperature was 7.8°C, 0.5°C below the mean, with the average daily low temperature being 3.0°C, 0.6°C above the mean. The warmest day was the 19th with an average temperature of 10.0°C, while the coolest day was the 1st with an average temperature of 1.0°C.
The average wind chill in the month was 3.8°C and the average dew point was 3.9°C. The high dew point was 10.6°C at 18:15 on the 10th. There were 4.4 hours of sunshine in the month, with the sunniest day being the 9th with 1.85 hours of sun recorded. A total of 1503.4 hours of sunshine were recorded in 2019, making it the sunniest year so far recorded here.
Rainfall in the month was 59.0 millimetres recorded on 23 days. This took the 2019 total to 817.8 millimetres, 9.0 millimetres less than the yearly record of 826.8 millimetres recorded in 2012. The yearly total was 144% of the average. The wettest day was the 12th when 11.2 millimetres was recorded. The highest rain rate of 122.6 millimetres per hour was recorded at 18:18 on the 10th. No snow was recorded.
The highest barometric pressure of 1034.2 millibars was at 10:52 on the 31st. The lowest pressure was 968.7 millibars at 01:15 on the 13th, the lowest of 2019. The average pressure in the month was 1005.8 millibars. The highest humidity was 100% and the monthly average humidity was 91%. The lowest humidity was 62% at 13:19 on the 9th.
Wind speeds were lower than average, with the highest wind gust speed being 32 mph recorded at 12:24 on the 14th, 2.7 mph below the month average. The maximum wind speed was 17 mph at 02:42 on the 15th, 4.6 mph below the mean. The wind run was 3608.0 miles, 97.1 miles below the December average. The average gust speed in the month was 7.0 mph, 0.4 mph below the mean. The average wind speed was 5.0 mph, 0.1 mph above the mean. The predominant direction was south westerly (214°).
The maximum high solar radiation recorded at 12:35 on the 14th was 336 w/m². The average solar radiation for the month was 21 w/m². The highest U.V. Index was 0.5 recorded at 12:04 on the 3rd.