MONTHLY CLIMATOLOGICAL SUMMARY for DEC. 1999 NAME: Ferryhill CITY: Ferryhill STATE: Co. Durham ELEV: 450 feet LAT: 54.5 N LONG: 1.5 W TEMPERATURE (°C), RAIN (mm), WIND SPEED (mph) HEAT COOL AVG MEAN DEG DEG WIND DOM DAY TEMP HIGH TIME LOW TIME DAYS DAYS RAIN SPEED HIGH TIME DIR ------------------------------------------------------------------------------------ 1 6.4 8.2 0:30 3.6 24:00 11.9 0.0 1.8 0.0 0.0 0:30 --- 2 4.1 5.3 15:30 2.4 2:00 11.5 0.0 1.8 0.0 0.0 0:30 --- 3 3.9 10.4 7:41 0.5 24:00 10.2 0.0 12.4 0.0 0.0 7:41 --- 4 1.6 3.2 13:30 0.2 2:30 16.7 0.0 2.4 0.0 0.0 0:30 --- 5 2.6 8.5 24:00 0.8 9:00 15.7 0.0 1.6 0.0 0.0 0:30 --- 6 9.7 11.1 13:00 6.9 24:00 8.6 0.0 1.2 0.0 0.0 0:30 --- 7 5.2 6.9 0:30 3.4 19:30 13.1 0.0 0.2 0.0 0.0 0:30 --- 8 5.5 7.3 14:30 4.4 9:00 12.8 0.0 2.4 0.0 0.0 0:30 --- 9 5.8 7.8 13:30 4.3 23:00 12.5 0.0 4.0 0.0 0.0 0:30 --- 10 3.5 5.4 12:30 2.0 18:30 14.8 0.0 0.0 0.0 0.0 0:30 --- 11 3.3 4.9 19:30 1.2 2:30 15.0 0.0 7.2 0.0 0.0 0:30 --- 12 4.0 5.1 2:30 2.6 22:00 14.3 0.0 3.6 0.0 0.0 0:30 --- 13 2.1 3.4 13:30 0.0 24:00 16.2 0.0 0.2 0.0 0.0 0:30 --- 14 1.0 2.9 22:00 -1.0 3:30 17.3 0.0 1.8 0.0 0.0 0:30 --- 15 1.4 2.8 22:30 0.6 9:00 16.8 0.0 1.4 0.0 0.0 0:30 --- 16 3.9 6.2 24:00 1.6 2:00 14.4 0.0 2.0 0.0 0.0 0:30 --- 17 5.7 9.8 7:30 0.4 24:00 12.5 0.0 0.4 0.0 0.0 0:30 --- 18 -0.1 1.4 12:00 -1.7 8:00 18.4 0.0 0.0 0.0 0.0 0:30 --- 19 -1.5 0.0 13:30 -2.8 4:30 19.7 0.0 0.0 0.0 0.0 0:30 --- 20 -2.9 -1.7 13:00 -4.3 10:00 21.2 0.0 0.0 0.0 0.0 0:30 --- 21 0.8 2.4 22:30 -2.6 0:30 17.5 0.0 2.6 0.0 0.0 0:30 --- 22 3.8 6.2 21:00 2.2 0:30 14.5 0.0 2.8 0.0 0.0 0:30 --- 23 5.7 7.7 23:00 3.4 4:00 12.6 0.0 0.8 0.0 0.0 0:30 --- 24 7.1 10.2 21:00 5.5 6:30 11.2 0.0 6.0 0.0 0.0 0:30 --- 25 3.8 7.1 0:30 2.1 18:00 14.5 0.0 0.4 0.0 0.0 0:30 --- 26 2.4 4.5 14:00 1.1 8:30 15.9 0.0 2.8 0.0 0.0 0:30 --- 27 2.5 3.7 13:30 0.6 18:30 15.8 0.0 0.0 0.0 0.0 0:30 --- 28 1.8 3.6 13:30 0.8 1:30 16.5 0.0 0.0 0.0 0.0 0:30 --- 29 2.2 4.2 14:00 0.7 18:30 16.1 0.0 0.0 0.0 0.0 0:30 --- 30 3.0 4.4 24:00 2.0 6:00 15.3 0.0 3.2 0.0 0.0 0:30 --- 31 5.6 8.5 21:30 3.8 8:30 12.7 0.0 0.0 0.0 0.0 0:30 --- ------------------------------------------------------------------------------------- 3.3 11.1 6 -4.3 20 456.0 0.0 63.0 0.0 0.0 1 --- (-0.6) (110%) Max >= 32.0: 0 Max <= 0.0: 2 Min <= 0.0: 6 Min <= -18.0: 0 Max Rain: 12.40 ON 3/12/99 Days of Rain: 21 (> .2 mm) 12 (> 2 mm) 0 (> 20 mm) Heat Base: 18.3 Cool Base: 18.3 Method: Integration A very mixed month. Generally wet and sunny, with temperatures close to normal - although made up from a mixture of cold and mild spells. A low pressure month. Warmest at the start (14.9C at Thorney Island) and coldest from 18-21st (-14C at Rhayader and Sennybridge in mid-Wales on the 20th). Some snow. The wettest December in England and Wales since 1993, and the sunniest since 1973. Very wet in the west, with flooding in Glasgow and the southwest of England. Memorable storm with 100mph gales on Christmas Eve and Boxing Day.