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oh my god. -2.5c in 2010.
That is absolutely amazing. We definately got much much lower than that.
I can't believe that you have only had temperatures as low as that when only a week ago I had a min around that. Very weird.
Zones are worked out from an average of absolute minimums over a 30 year period. I worked out Portsmouth's from the Southsea weather station data & it came in within the 9b threshold.
Most of the UK & Ireland are in zones 8a & 8b (Only highland Scotland has a zone 7a & highest ground in northern England has 7b).
Northern Ireland is not any lower than 8a in the interior, with 8b around 30/40 miles from the coast & 9a around the coast itself. Southern Ireland has 9b around the far south west coasts, with some areas even being 10a.
The only part of the UK to have a 10a climate zone are the Scilly Isles.
Zones are worked out from an average of absolute minimums over a 30 year period. I worked out Portsmouth's from the Southsea weather station data & it came in within the 9b threshold.
Most of the UK & Ireland are in zones 8a & 8b (Only highland Scotland has a zone 7a & highest ground in northern England has 7b).
Northern Ireland is not any lower than 8a in the interior, with 8b around 30/40 miles from the coast & 9a around the coast itself. Southern Ireland has 9b around the far south west coasts, with some areas even being 10a.
The only part of the UK to have a 10a climate zone are the Scilly Isles.
Well that map disagrees, I would say that there are a few hilly areas in Tyrone that may just make it into the 7b boundary.
Where do you get the data to calculate the absolute minimum? I will be using a station other than magilligan for sure as its minimum temperatures are like 5c warmer than mines.
Well that map disagrees, I would say that there are a few hilly areas in Tyrone that may just make it into the 7b boundary.
Where do you get the data to calculate the absolute minimum? I will be using a station other than magilligan for sure as its minimum temperatures are like 5c warmer than mines.
Eh? That map pretty much agrees with what I wrote lol...
Anyway that map is just a general interpretation, it says Portsmouth is in zone 9a, the same as areas a few miles inland, where it gets much colder in winter (my Mum lives inland from Portsmouth & she gets much more frost & snow than I do) also central London is definitely 9b...
I had to get the data for Southsea from the Met Office as it isn't available online anywhere. They do usually charge though, unless it is for academic research.
No you said that in Northern Ireland areas in 8a are 40 miles inland well if that was the case. The areas in 8a would only cover a very small area.
I was thinking of doing it with ogimet but then that would take several hours. Is there a way of going onto ogimet and any other websites and getting the extreme minimum for a station in a year.
There is data on Ogimet but I don't know how to calculate the zone that I am in?
You take the winter minimums for each year and average them out. Let's say you have minima of 0F, -9F, -25F, 1F, and -4F. That would average out to -7.4F over those 5 years, placing you in zone 6a. You need at least 20 years of data to get a good handle on it, but that's how it's done.
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