Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
I meant a comparison of the whole time-series from Heathrow and not the last 30 years.That would settle the argument
No, it wouldn't. Climatic periods are measured in 30 years - 1961-1990, 1971-2000, 1981-2010. London's climate, in line with the rest of the world, is warming. What the weather was doing 100 years ago, is irrelevant today.
Just admit that you're wrong and we can go back to normal.
Actually it would since this is not a meteorological parameter that is examined as per the standard way of 30 year intervals.Usually the Met Office provides averages of 30 year periods for specific parameters.This one is just very specific/sporadic and needs way more time depth.
Heathrow, and what on earth are you going on about? If only 6 out of the last 30 April's haven't recorded 20c, then what does that tell you?
Seriously, is this a wind up?
Seems so, since the average absolute max for April is 21.5c. 24 out of the last 30 years at Heathrow have seen 20c by either March or April, and every year in Heathrow's history has seen 20c in May.
Even May 1996 - one of the coldest, if not the coldest on record - saw 26.1c.
Seems so, since the average absolute max for April is 21.5c. 24 out of the last 30 years at Heathrow have seen 20c by either March or April, and every year in Heathrow's history has seen 20c in May.
Even May 1996 - one of the coldest, if not the coldest on record - saw 26.1c.
Yes but the problem here is that we are examining only 30 values.It's not like we are examining a meteorological parameter like mean maxes/mins where we can safely derive a climatic statistic. We need more time depth to determine this.I say go back and check each year on Heathrow's time-series.It makes more sense.
Ok I have done it for you.So from 1960 (when records for T in Heathrow begin) until 2015 we have 35 out of 56 Aprils that registered a 20C.So you are right for the most part but what is interesting is that it's due to the last 20-30 years that we get this result.I am pretty sure that if we check an even longer time series in London we'll get a different result
That doesn't include the years where 20c was recorded in March. Whatever way you look at it, most years will see 20c before May begins. I posted averages for another London station from around 1850-1900, and April was warmer then than it is now.
The average absolute max for the spring months are 17.3c for March, 21.5c for April and 25.5c for May.
Friday 6th looks like it'll be the first day to break 20c and also 70f/21c. Saturday 7th will be the first 75f day of the year, and either day next weekend could be the first 25c day.
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.
Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.