MONTHLY CLIMATOLOGICAL SUMMARY for DEC. 2009 NAME: Ferryhill CITY: Ferryhill STATE: Co. Durham ELEV: 394 ft LAT: 54° 41' 00" N LONG: 1° 33' 00" 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 1.1 3.4 21:00 -1.2 9:00 16.9 0.0 1.8 0.0 0.0 --- --- 2 4.1 5.5 13:00 2.6 0:30 13.9 0.0 0.4 0.0 0.0 --- --- 3 4.9 6.2 11:30 3.7 15:30 13.1 0.0 2.0 0.0 0.0 --- --- 4 4.7 6.5 14:00 2.8 18:30 13.3 0.0 0.0 0.0 0.0 --- --- 5 6.4 8.4 00:00 4.3 0:30 11.6 0.0 4.4 0.0 0.0 --- --- 6 7.9 10.3 5:30 5.5 23:30 10.1 0.0 6.8 0.0 0.0 --- --- 7 6.7 8.6 14:30 4.8 4:30 11.3 0.0 1.4 0.0 0.0 --- --- 8 5.8 7.9 23:30 3.6 8:30 12.3 0.0 0.8 0.0 0.0 --- --- 9 7.3 8.6 14:30 5.9 9:30 10.8 0.0 1.6 0.0 0.0 --- --- 10 5.5 7.8 13:30 3.2 22:30 12.5 0.0 1.0 0.0 0.0 --- --- 11 3.4 4.8 13:00 2.0 8:30 14.6 0.0 0.2 0.0 0.0 --- --- 12 4.2 5.4 14:00 3.0 1:00 13.8 0.0 0.2 0.0 0.0 --- --- 13 4.1 5.4 13:30 2.8 22:30 13.9 0.0 0.0 0.0 0.0 --- --- 14 5.2 7.5 21:30 2.9 0:30 12.8 0.0 3.6 0.0 0.0 --- --- 15 5.5 6.3 0:30 4.7 8:30 12.5 0.0 4.4 0.0 0.0 --- --- 16 4.6 5.6 16:30 3.6 23:30 13.4 0.0 9.0 0.0 0.0 --- --- 17 1.2 3.7 0:30 -1.2 23:30 16.8 0.0 4.0 0.0 0.0 --- --- 18 -0.8 0.1 1:30 -1.6 21:30 18.8 0.0 0.0 0.0 0.0 --- --- 19 -1.3 0.8 17:30 -3.3 00:00 19.3 0.0 0.0 0.0 0.0 --- --- 20 -2.2 0.3 21:00 -4.7 4:30 20.2 0.0 0.0 0.0 0.0 --- --- 21 -1.9 0.4 6:00 -4.3 23:30 19.9 0.0 0.0 0.0 0.0 --- --- 22 -2.0 2.1 00:00 -6.2 9:00 20.0 0.0 0.0 0.0 0.0 --- --- 23 -0.3 2.2 1:30 -2.8 20:00 18.3 0.0 1.0 0.0 0.0 --- --- 24 -0.1 1.3 13:30 -1.5 1:00 18.1 0.0 1.6 0.0 0.0 --- --- 25 -0.7 1.4 14:30 -2.8 1:30 18.7 0.0 0.2 0.0 0.0 --- --- 26 0.8 2.1 13:30 -0.6 9:00 17.3 0.0 1.2 0.0 0.0 --- --- 27 1.8 2.4 14:00 1.1 3:30 16.2 0.0 8.0 0.0 0.0 --- --- 28 0.5 1.8 0:30 -0.8 9:30 17.5 0.0 0.0 0.0 0.0 --- --- 29 0.9 2.9 15:30 -1.1 2:00 17.1 0.0 3.8 0.0 0.0 --- --- 30 2.7 3.6 9:00 1.9 00:00 15.3 0.0 5.0 0.0 0.0 --- --- 31 0.8 2.2 0:30 -0.7 00:00 17.3 0.0 0.6 0.0 0.0 --- --- ------------------------------------------------------------------------------------- 2.6 10.3 6 -6.2 22 477.6 0.0 63.0 0.0 0.0 --- --- Max >= 32.0: 0 Max <= 0.0: 0 Min <= 0.0: 14 Min <= -18.0: 0 Max Rain: 8.99 ON 16/12/09 Days of Rain: 23 (> .2 mm) 10 (> 2 mm) 0 (> 20 mm) Heat Base: 18.0 Cool Base: 18.0 Method: (High + Low) / 2 1st Very frosty start. Ice on cars. Becoming cloudy from the west. Wind increasing. Feeling cold. Rain and sleet after 9pm 2nd Foggy and very dull, but slightly warmer. Wind light S. Fog lifting by mid morning. Damp day, but no rain 3rd Damp start. Calm winds. Advection fog on fields. Moderate rain from mid morning to mid afternoon. Dry evening 4th Starting dry and clear. No frost. Blue sky and sunshine all day. Clouding up after dark. Wind freshening from S. 5th Overnight rain, then foggy morning. Light wind. Dry until early evening, then rain. 6th. Damp morning after heavy overnight rain. Cloudy and dull. Clearing to showers in the afternoon. Cool, strong NW wind 7th Another damp morning, with a stiff southerly breeze. Brief sunshine and blustery showers. Heavy in early evening, then clearing 8th Clear start. Advection fog on fields. Mainly bright and sunny. Calm winds. Wind freshening from SW then rain later 9th Clear again to start. Quite mild. Sunny clear morning. Hazing over slightly this afternoon, then cloudy with rain by 9pm 10th Clear start again. Cooler. Bright sunshine all day. Light W drift. Ground frost developing 11th Ground frost, but no air frost. Mist lifting to low cloud, then fog. Feeling cold. Fog lifting mid-evening. Cold 12th Foggy this morning, but again no air frost. Fog lifting to reveal sunny afternoon. Dry but cold 13th Fair, morning. Freshening wind from N. Feels raw. Sunny spells. Dry. 14th Cloudy and damp morning. Light rain. Wind light NW. Heavier rain this afternoon, clearing later. 15th Cloudy and damp start. Drizzly rain at midday. Feeling raw. Heavy showery rain later. NE wind picking up 16th Still relatively mild. Winds light NW. Rain showers all day. 17th Colder overnight. Some sleet showers. Snow showers, becoming persistent later. Stiff NE wind. Showers continuing overnight 18th 2cm of snow cover. Light snow showers. Very cold. Occasional snow showers, then heavier later. Wind now Northerly 19th Sunny, very cold day. Clouding over in late afternoon from North. Heavy snow in evening. 8cm fresh snow. 20th Very cold. Westerly breeze. No further snow, but no thaw in that still lying. Roads still very poor 21st Snow lying. Slightly warmer overnight. Snow shower am. Slight thaw, but freezing again later. 22nd Freezing Fog over snow cover. Very cold. Temp down to -6.1 degC. Spectacular rise in mid afternoon of 5 degC in 1 hour 23rd Slow thaw overnight and continuing today. Mostly sunny with light wind. Temps back below freezing after dark. 24th More snow after midnight. Another 4-5cm. Light winds. Snow showers early am. Freezing fog later. 25th Fog lifted. Snow still lying. Cold and calm. Sunny with slight thaw. Snow shower later making official white xmas. 26th Slight thaw overnight. Shallow freezing fog early. Thaw of lying snow continuing. 27th Still lying snow. First frost free night for 10 days. Early fog. Thaw continuing. Rain in afternoon. 28th Lying snow. Cold and sunny, but thaw continues. 29th Lying snow. Very dull and cold. Occasional hail showers on easterly wind. 30th Lying snow but almost gone. Hail and rain showers. Strong N wind. Heavy hail later. Showers becoming more wintry. 31st Just more than 50% cover at 0900 but snow showers in afternoon giving a fresh covering. Thundersnow too after dark.