Total sunshine duration for April 2025 (46 sites, with >=26 daily observations).
Month/Year:
Reduce ob count by:

Highest 10
Saint Helier (54 m, S)234.9 hours
Jersey: Airport (84 m, S)214.8 hours
Tiree (9 m, S)211.3 hours
Shoeburyness, Landwick (2 m, S)209.5 hours
Wattisham (89 m, S)208.9 hours
Tibenham Airfield (52 m, S)205.9 hours
Dundrennan (113 m, S)205.2 hours
Heathrow (25 m, S)204.3 hours
Stornoway Airport (15 m, S)204.1 hours
Waddington (68 m, S)203.2 hours

Lowest 10
Bala (163 m, S)150.8 hours
Dyce (66 m, S)151.0 hours
Liscombe (348 m, S)152.6 hours
Lake Vyrnwy No 2 (360 m, S)152.8 hours
Edinburgh, Gogarbank (57 m, S)156.9 hours
Boulmer (23 m, S)158.7 hours
Charterhall (112 m, S)161.1 hours
Casement Aerodrome (97 m, S)163.5 hours
Shobdon Airfield (99 m, S)164.8 hours
Camborne (87 m, S)166.8 hours

Estimated* UK Average: 182.9 hours (39 stations).
*bias corrected average across all UK SYNOP reports.

*MIDAS UK data available from 1887
*SYNOP data available from 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.


For months before and including December 2020 official quality controlled data from the National Climate Information Centre will be plotted for UK stations, from the MIDAS Open dataset. By default only stations with a full record for the selected month will be plotted, to also plot stations with an incomplete record use the "Reduce ob count by" drop-down menu to reduce the total number of observations required before a station will be filtered out. Please note that for these MIDAS Open stations, the Monthly Graph link does not yet work correctly.


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 - P means a pyrheliometer was used, C 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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