Daily sunshine hours observed on 17th June 1983 at 03xxx stations (305 reports).
Date (00Z D to 24Z D)
-1 day
+1 day
Plot hours Plot % of theoretical max
UK only UK & ROI
Highest 10
Valley (10 m, CS)14.7 hours
Anglesey: Llyn Alaw (44 m, CS)13.0 hours
Silent Valley (129 m, CS)12.9 hours
Prestatyn (4 m, CS)12.8 hours
Tenby (5 m, CS)12.5 hours
Mourne Grange (44 m, CS)12.4 hours
Botwnnog (34 m, CS)12.2 hours
Aughton (54 m, DRV)12.1 hours
Aberporth (133 m, CS)12.0 hours
Dale Fort (33 m, CS)12.0 hours

Lowest 10
Coleraine University (23 m, CS)0.0 hours
Hartland (142 m, CS)0.0 hours
Brawdy (111 m, CS)0.0 hours
Machrihanish (10 m, CS)0.0 hours
Upper Killeyan (90 m, CS)0.0 hours
Bedford (85 m, CS)0.0 hours
Binbrook (108 m, CS)0.0 hours
High Mowthorpe (175 m, CS)0.0 hours
Hartburn Grange (31 m, CS)0.0 hours
Durham (102 m, CS)0.0 hours

Average Sun = 3.1 hours

*MIDAS UK data available from 1887
*SYNOP data available from 2000
*Background satellite imagery from 25/02/2000

Data courtesy of MetOffice and OGIMET
OpenMIDAS Data - Met Office (2021): MIDAS Open: UK daily temperature data, v202107. NERC EDS Centre for Environmental Data Analysis, 08 September 2021.


Methods for measuring sunshine have changed over time, older records and some climate sites today will use a Campbell-Stokes sunshine recorder, whereas nowadays the majority of measurements will be taken using a pyrheliometer and threshold of 120 W/m^2 for sunshine. The instrumentation used is indicated by the letters in the table - WMO means a pyrheliometer was used, CS means a Campbell-Stokes recorder was used, and S means that the value was extracted from the SYNOP report (most likely to be a pyrheliometer measurement but not for certain). Clicking on an icon in the map will display a popup which also contains this information.

It is possible to convert the newer pyrheliometer measurements to a Campbell-Stokes equivalent for a fairer comparison across time, which is done for climatological purposes, and is a function which I may add to this page at some point.



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