I also heard the sun was out that day. Not good!

I have now confirmed that the figure used for the Cambridge Airport 38C METAR was 38.2 before rounding.

 I certainly dont know , but it seems a bit fishy.

Shocking. For this reason maximum temperatures should only be recorded at night.

I would think, as the Met office spent four days checking and scrutinising it, that the station meets all their required standards.  Whether or not they review their standards in the future, leaves to be seen. 

There’s one thing for certain, the next time we break the record, the question of the reading from the dodgy Cambridge station will be brought up again, like Brogdale.  

So if NIAB recorded  38.1C and the airport 38.2C it seems foolish  to quibble over another half a degree. Unlike Brogdale which seems to record about 2C higher than it "should" by all accounts.

Gravesend and Kew are dodgy too according to someone on Netweather so they’re out. Oh and Northolt and Heathrow too. In fact, all mainland stations are unreliable. The actual record is 23C in Shetland.

Jeez - just let it go, Rob.

I've already explained why Brogdale's temperatures are higher than the nearest other stations, but as you may have missed it here we go again!

• Faversham is located on the lee side of the North Downs and given winds from a southerly quarter is prone to a localised Foehn effect. This leads to relatively high temperatures given the right wind setup (which occurred in 2003 and again in 2019).


• Manston is on top of a plateau - no Foehn effects


• East Malling is on the other side of the Downs - again, no Foehn effects there

I know you won't accept it (even though the Met Office do), but please let it be an end to your moaning.

Frankly if the Met Office say a particular reading from a particular site stands, it should be good enough for everyone.

Thing is, there will always be places that will be warmer than others under certain conditions due to local topograpy. Under the right conditions frost hollows can give night minima a lot more than 2C lower than the surrounding area. Funny how nobody ever seems to question that. It's just local topography again.

Don't have a go at me, I'm not the one moaning about it. Just quoting the article in "Weather"!

As others have said, local topography means hugely varying temperatures, so what is "representative" anyway? 

The issue I have is that clearly the Met Office aren't applying their own rules, or are doing so inconsistently. Eg the bare soil at CBG, the high hedge at Brogdale. I bet if you audited all the Met Office weather stations around the country then you would find the majority break one or more of the guidelines that the Met Office are supposed to apply!

The real problem though is the constant chopping and changing of weather stations which makes it hard to compare over time - that and the number of stations that seem to be wholly or partially out of order at any one time. The price you pay for automation.

It certainly comes off as moaning, as you keep having these little digs at it. The Met Office consider it valid, simple as that. They, not anyone writing in Weather, or UKWW, or NetWeather, or uk.sci.weather for that matter, are the arbiters of what's valid or not.

And as I've said, there are specifics in the area (I've lived nearby for 35+ years, after all) which mean the Brogdale readings make sense.

There will be some rules which are unbreakable (i.e. not having a Stevenson screen with a minimum of 1.5m of grass or "representative surface" in all directions around it). Then there are some which are desireable, but not essential (as per the WMO guidelines). The WMO guidelines don't, for example, explicitly forbid having bare earth almost adjacent to a screen. They don't forbid having hedges nearby, either, with regards to temperatures.

https://library.wmo.int/pmb_ged/wmo_8_en-2012.pdf

Page 20 has the specifics and yes, both sites comply with regards to temperature. It could be argued that the conditions aren't anywhere near strict enough, but as it stands they are what they are - hence the record stands.

Now that I would agree with - for all the potential faults of the likes of Gravesend, Heathrow etc, it's better to have them than not at all. There are of course all manner of microclimates dotted around and the more coverage in general the better. It's a shame there isn't more effort put into creating new stations, as it all seems a bit lackadaisical.

http://wow.metoffice.gov.uk/weather/view?&reportId=8082001&siteID=25668314

Do we know what the official width of the grass border is at the CBG weather station? On the photos it looks less than 1.5m on one side at least, however it is impossible to be sure because of the angle they are taken from.  

Explanation in the product description here.

Very interesting, but certainly not cheap! 

I'm tempted next time I go into Cambridge to take a photograph of the Botanical Gardens Weather Station. Hopefully they'd let me as I am a member of the Royal Meteorological Society.

Anyway I'd like to know just out of academic curiosity what it looks like.

Somone did just that and posted the picture here, most likely in this very thread. Can't remember who it was but if you search back I'm sure you will find it.

It is on page 37, 4th post down. Posted by James

IMO it was impossible to tell from the photo.

I don't know why it is proving so difficult to get an answer to a very simple question TBH. The grass border is either 1.5m wide all the way around the Stevenson screen or it isn't. 

Edit: the Google 3d view helps. The imagery appears to be from 2019 and to me it looks as though the grass border is more than 1.5m.

https://www.google.co.uk/maps/place/Cambridge+University+Botanic+Garden/@52.1939569,0.1286754,62a,35y,90h,39.61t/data=!3m1!1e3!4m5!3m4!1s0x47d8709dc9b6fa03:0xeddc913f0dc06549!8m2!3d52.193364!4d0.1275918?hl=en-GB&authuser=0

Of course, one relevant point to this whole debate that could apply to any weather-station whose location had not drastically changed for a few years is that it also broke its own record, which even if warmer than other local stations, is still a significant observation.

You can right click and 'measure distance' on Google from a PC. I measure it at pretty much dead on 1.5m at the shortest distance