Met Office Hadley CET, 2015 to date:

http://www.metoffice.gov.uk/hadobs/hadcet/cet_info_mean.html

The biggest monthly anomaly to so far is 1.1C in April. I've not looked through the stats but I would think the monthly anomalies this year to date are anomalously low. 

Aye, we are actually running at 0.13c above average CET for the year - which is skewed somewhat by the March-April +anomaly.  Take that out and it would be very average, if not below (okay, I cant be bothered to work out the maths!)

Interesting to note how the CET rarely reflects on global temp and if anything is often a mirror reversal (1976 being a case in point).   Coincidence?

Given the Hadley CET is based on the 1961-1990 period which is 25 to 54 years out of date and using a more relevant 30 year period ie 1981-2010 2015 will more than likely be below average with April showing a small + anomaly,the same could be said using 1971 to 2000.

Why Hadley continue to use an ever increasingly out of date period I don`t understand as it does not give a true comparison anymore to recent years past.

My point was about the monthly anomalies to date, not the aggregate deviation from CET. My guess is it must be quite unusual for a year where the biggest monthly anomaly is 1.1C. 

I believe it is unusual for this to be the case.  Well spotted!

It could be that we have become so use to temperature extremes. How many have happened in the last few years? You could argue it makes a change!

Has it been an average year in terms of rainfall and sunshine though? 

Surley though you can`t have a FIXED comparison period that is ever increasingly out of date to something as variable and ever changing as weather and climate. So why don`t Hadley use 1861-1890 or even 1761-1790??

I personally think the time has come to change `the fixed comparison period` to 1981-2010 for the cet record.

I think one thing is for certain: Regardless of what happens in November and December, I imagine that this year will return a notably cooler overall CET than 2014 did. We have had, so far, a below average May, June, July and September in 2015 according to the Hadley CET table that Brian posted at the start of the thread. IIRC last year only saw one below average CET month, August, whilst every other month in 2014 returned an above average CET if I'm not mistaken.

Murphy's law DICTATES that the situation will go significantly positive (mild) in January 2016

I think you've got to go back to 1832 to find a year where the maximum monthly CET anomaly was the same as this year's (to date) 1.1C and before that it also happened in 1824. I've not been able to find a year where the maximum monthly CET anomaly was less than 1.1C.

I can see the Express headline now:

MOST AVERAGE YEAR EVER! EXTREME NON-EXTREME WEATHER TO HIT!!

May even be better to be modernized to go for 2010 onwards. Will show an upwards trend which people are concerned with these days....

The WMO mandates 30-year periods, refreshed every 30 years. As it's not yet 2021, we're stuck with 61-90.

(There is an option to use updated decades, such as 81-2010, but it's not mandatory.)

With all said and done, one thing is for sure: bore fest!

As a fan of extreme weather, I am hoping for some fun events in Europe as most of the action in recent years seems to be across the pond.

I don't think we'll remember 2015 as the most exciting year of weather ever, LOOOOOL

3 Stations that I use figures of are 2010 to present. My own Mean only goes back to 2013 when my records started.

Not sure if TomC or John Mason ever pop in here, but I believe it was one of those two (apologies if not) that posted in the climate thread not long ago that the standard is to move the reporting period on every 30 years. That means that after 61-90, the next period for comparison will be 91-20. As a result we are about 5 years from an update.

What's Up with  that  had a go at that figure because of it's surrounding and next to a concrete construction  as it would have been a heat sink possible having an effect on the weather station....