Daily sunshine hours observed on 20th May 1965 at 03xxx stations (343 reports).
Date (00Z D to 24Z D)
-1 day
+1 day
Plot hours Plot % of theoretical max
UK only UK & ROI
Highest 10
Wight: Ryde (4 m, CS)14.5 hours
Bournemouth (40 m, CS)14.1 hours
Wight: Shanklin (55 m, CS)14.1 hours
Spadeadam (274 m, CS)14.1 hours
Swanage (10 m, CS)14.1 hours
Wight: Sandown (4 m, CS)14.0 hours
Hayling Island (4 m, CS)13.9 hours
Filey (37 m, CS)13.8 hours
Huddersfield (99 m, CS)13.8 hours
Huddersfield, Oakes (232 m, CS)13.8 hours

Lowest 10
Evie (34 m, CS)2.3 hours
Pitlochry (144 m, CS)3.2 hours
Fettercairn, Glensaugh No 2 (171 m, CS)3.5 hours
Lough Bradan (169 m, CS)4.1 hours
Stenness (23 m, CS)4.1 hours
Tiree (9 m, CS)4.3 hours
Ballykelly (4 m, CS)4.3 hours
Wick Airport (36 m, CS)4.5 hours
Kirkwall (26 m, CS)4.7 hours
Perth (23 m, CS)4.8 hours

Average Sun = 10.4 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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