https://en.wikipedia.org/wiki/Tarfala_research_station 

The maximum temperature at Edinburgh Gogarbank was 21.5°C.

At that same station, a total of 10.6 hours of sunshine was recorded for the day which isn't bad although it's a tad disappointing not to have got our sunniest day of the year so far out of this spell of weather given that we are still in the time of year when the days are getting longer with more available sunshine per day as a result.

Given that this has been such an exceptionally sunny month within an exceptionally sunny spring though, that would just be clutching at straws and so I don't have any real complaints with that.

7.2, dew 6.0, the low so far also being 7.2. Yesterday's high was 18.9.

Yep, same here yesterday. This was more than the usual deep blue with wispy shreads of white high cloud. It was just pure glarish white everywhere that gave everything, from earth to sky, a very unappealing and colourless bleached look, despite the sun. It was akin to having a huge high power spotlight shining directly in your face no matter what direction you turned. 

I think the breeze will get up like yesterday. Watering done. Without those two batches of rain several days ago the garden would be showing it more than it does. Looks dry for the forseeable. I hope I'm wrong.

It dropped to 8 C overnight and another day in the garden beckons.

Yesterday's MetO max was 24.7C at Trawsgoed near Aberystwyth, but 24C widely recorded so I'm not surprised for unofficial stations to reach 25C.

There's still a lot of high cloud around but there's none of the fair weather clouds which were around yesterday and the Sun is still getting through those high clouds without any problems.

In addition to that, today's temperatures have not yet peaked here in Edinburgh and are still rising as I write.

As today is the last day of this month, this means that in the final statistics for this month, a total of three 20+°C maximums have been recorded this month at Edinburgh Gogarbank which for this early in the season, is very impressive indeed especially when you consider that in other recent years, we have generally been having to wait until the end of May before eventually getting even our first 20+°C maximum of the year.

Indeed there are pictures online that apparently show the site compromised by temporary barriers and a mobile toilet. If it's genuine, that is a joke for such an important site.

The public toilet that is St James's Park is 27.7c but surely will be discounted. 

Currently sunny, 18.1, dew 13.8, the high so far being 19.3.

The MetO raw still has 29 tomorrow here, but it has 21 today. I suspect possibly the mid 20s as a high, but even so that depends on us losing the sea breeze - nature's a/c has been hard at work over the past couple of days, and no complaints here! 😂

I'm pretty sure it will be excluded once quality control is done. But it shouldn't be that way in the first place.

I also noticed Lakenheath hit a rounded 29C on Weatherobs, way out of whack with surrounding stations. But that's not a Met Office one anyway.

Chertsey's thermometer is also in the middle of a solar farm these days and should likely also be discounted.

Yes the UK WS network is a bit of a joke. The fact that one of the most prominent ones is currently a public toilet sums it up.

There have been other late April days when 26.7 was exceeded, 1893 and 2011 exceeded that figure between 20th and 25th.