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Europe

Valley





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax120411191239119812351200
Tmin120711211239119812361197
Duration of sunshine248254279270310300
Precipitation186168186181186180
Humidity/Visibility184167185178184178


ParameterJulAugSepOctNovDec
Tmax123612381219126012251270
Tmin123812421220126212281270
Duration of sunshine310310300310256310
Precipitation186190212214210218
Humidity/Visibility184185206209206212


Climate data is usually derived from meteorological data of a certain number of years. The actual number of recorded years may vary from only a couple to 50 years or more. The quality of climate data depends on the number of available recorded years. Fewer years means less reliable data. The standart-period for reliable climate data is 30 years. For example, the mean monthly temperature for, let's say January, would ideally calculated from a total number of 930 recorded January-days. However, the usual number of recorded days is much smaller. The table above shows the actual number of recorded days for every parameter measured.
Nearby Weather Stations - Holyhead Distance
Raf Mona 17.5 km
Aberdaron 56.4 km
Capel Curig 68.8 km
Isle of Man Airport 93.1 km
Bala 112.4 km
Rhyl 114.0 km
Trawscoed 119.8 km
Aberporth 124.0 km
Lake Vyrnwy 131.1 km
Crosby 165.6 km
Sennybridge 166.4 km
Pembrey Burrows 171.2 km
Walney 172.3 km
Hawarden 172.8 km
St Bees Head 174.0 km
Blackpool Airport 176.2 km
Milford Haven 181.3 km
Dundrennan 182.1 km
RAF West Freugh 184.0 km
Liverpool AP 187.6 km
Warton Aerodrome Airport 191.8 km
Dublin Airport 192.2 km
Mumbles 196.6 km
Dublin Csmt Aero 211.6 km
Belfast/Harbour 212.1 km
Shawbury 213.7 km
Shobdon 214.6 km
Keswick 215.5 km
Credenhill 232.4 km
St Athan 238.5 km
Stonyhurst 239.0 km
Rostherne 239.8 km
Johnstown Castle 243.6 km
RM Chivenor 244.3 km
Glenanne 244.5 km
Cardiff Airport 244.8 km
Belfast Intl. Airport 245.0 km
Shap 248.4 km
Manchester 250.7 km
Prestwick 251.6 km
Carlisle 256.0 km
Cosford 257.1 km
Cosford 257.1 km
Cosford 259.7 km
Liscombe 262.1 km
Oak Park 267.2 km
Eskdalemuir 272.5 km
Machrihanish 274.7 km
Warcop Range 277.3 km
Drumalbin 277.4 km
Portglenone 279.2 km
Ballypatrick Fst 281.0 km
Great Dun Fell 281.3 km
Thorncliffe 284.4 km
North Wyke 284.6 km
Bristol / Lulsgate 289.5 km
Glasgow Airport 291.2 km
Glasgow Bishopton 294.8 km
Spadeadam II 297.9 km
Spadeadam 297.9 km
Lough Fea 301.8 km
Dunkeswell Airport 301.9 km
Bingley 303.3 km
Pershore 304.0 km
Gloucestershire Airport 304.2 km
Cardinham 305.3 km
Exeter Airport 306.0 km
Waterford Airport 307.7 km
Newquay Airport 315.9 km
Mullingar 316.5 km
Ballyhaise 320.5 km
Emley Moor transmitting station 321.6 km
Birmingham Airport 324.1 km
Plymouth MtBatten 324.6 km
Edinburgh Gogarbank 325.6 km
Yeovil 327.4 km
Edinburgh Airport 327.5 km
Leeds Bradford Airport 328.2 km
Coleshill 328.5 km
Islay/Port Ellen 330.5 km
Redesdale Camp 337.8 km
Magilligan 342.1 km
RAF Lyneham 343.1 km
Coal Aston Airfield 345.5 km
Camborne 347.5 km
Fairford Airport 351.6 km
RAF Little Rissington 351.9 km
Strathallan 351.9 km
Eglinton Airport 353.0 km
Glen Ogle 353.0 km
Leeming 353.8 km
Albemarle 354.7 km
East Midlands Airport 359.8 km
RNAS Culdrose 360.3 km
Thomastown 361.1 km
Charterhall 363.1 km
Topcliffe 366.2 km
Nottingham/Watnall 366.4 km
RAF Brize Norton 368.4 km