I think you are making a lot of assumptions about the weather of a couple of seasons. Yes, I think climate change warming is occurring (hate the verb 'believe' being used here as it almost implies something theological).
I understand too that the warming is linked with a general increase in precipitation (but perhaps not in all regions). Further, precipitation events and the lack thereof, will also get more extreme (periods of drought and then flooding).--Hardly a net advantage for agriculture ,or horticulture for that matter. I am not convinced that the precipitation differences you are seeing will necessarily be sustained as a new pattern. Funny, thing about us humans, we always want to see patterns in nature (whether it's faces in the clouds or rhythms in the local climate. At this point, I'd be hard pressed to discern a local pattern to my climatic area. Last year, we had over 80 inches of rain (part of which came in the form of both record, repeated winter snowstorms, and a summer hurricane. This year, we had almost no snow (or an anomalous/ freak Fall snow event). This year, we are deficit by 7 Inches of rain while most of the country is in moderate or severe drought. Sections of Texas that saw severe drought last summer were just flooded out with record rainfall. It seems to me that the climate machine is still in flux and it is too early to assume what the end state will look like. I compare it to the transition of the seasons in the North in earlier, normal times. You'd have cold snowy days, then rainy ones, then mild days, only to be followed by late frosts. Eventually, the weather settles into the more stable, warmer state. And in the USA, this transitional time is often associated with severe coastal storms or tornadoes in the interior. How this plays out in the end, I don't know. Warmer generally, yes (in both winter and summer), but are the freakish cold spells that have occurred in recent winters at temperate and subtropical latitudes temporary or something to continue? Many areas seem to be experiencing more overall rainfall per year but it seems to arrive in increasingly severe, erratic storms of destructive potential. I hope the changes do bring you benefit, but so far I am not seeing it. I was going to mention Alaska as a potential benefactor, then I remembered this past winters record snows measured in the hundreds of feet! Time will tell. In the meantime, enjoy the fruits of your harvest. Njoasis.

I am sorry, but this has been researched. Moreover: the trend is not just this year or the past few ones. It is a trend that has started at least since 1900 and the rise is unabated and it is rising much faster than any model predicted. It is more than 2 standarddeviations off if I remember correctly.
And indeed: there is no reason why this should stop. I understand that you take it in another way: ""It will continue". I don't mean, but understand it looks that way rereading my message. what I say is correct. IF it continues this way does not mean that it will, strictly speaking.
Indeed: a simple extrapolation to 2100 would lead to the values I noted. Will it? A continuing rise is what most models predict, but they are already behind. Not just based on a few years. The rising, signficant trend is simply much steeper than any model predicted. We could end up even wetter, we could end up somewhat wetter than now. It is unlikely the trend will change into a negative one, but the rise could become less steep.

This is all based on first my own calculations AND the recent support by KNMI research that it is getting than expected.

When it comes to the future, nothing is sure. It are all models. The most likely outcome globally is warming, locally over here it is also "wetting".

I'll throw in my two cents but I would say that many people here consider this topic more destined for a weather/climate modeling forum then the conifer forum.

In any case, I lean pretty strongly towards this being a pattern indicating a direct response from the climate due to greenhouse gases *because*:

Generally in nature random variation from the norms occur. We get record warm Springs, record snowfalls in certain months, record droughts, etc.

When severe, record-setting weather occurs back to back or even back to back to back, the odds of it being just random fluctuation and noise in the scheme of the randomness is exceedingly unlikely, particularly when it closely resembles the suggested outcome scientists have warned about for years. ie.If you have a family history of liver cancer, then your skin starts turning yellow and the next season it's a darker color yellow(jaundice) - you probably have liver cancer.

Now for the US climate, the last three Winter/Summers look like this for the region most effected by climate change(the Mid-west):
2011 Summer: Record hot and dry.
2012 Winter: Record warm and dry.
2012 Summer: Very hot 30 year drought(or near-record dry.)

ENSO and other rotating effects have a hard time baring the blame as well because these phenominon have occured many cycles before without the same consistently harsh effects.

All told this is how I see things, quite linearly and simply:

The scientists guys wearing their white smocks and having a far greater intillect than I said:
Climate change will cause precipitation anamolies and temperature increases, particularly in the Midwest/East coast.

Now we have three consecutive solstice periods bearing exactly the results we've been warned against.

To me this is like having your mechanic tell you that your engine is low on oil and then driving for 18 months with smoke pouring out of your tailpipe, ignoring the experts diagnosis until your engine siezes up.

Incidentally, more fuel to the fire, the PNW, similarly to the Netherlands, has been suggested that we will see minimal temperatures increases with climate change but that we WILL see precipitation increases, which is exactly what we have seen: MUCH more Spring and Summer rains the last 3 years, probably attributable to altered jet streams or increased Spring/Summer ocean temps.

-Will

Taht is the "fun" thing: the rapidly melting polar ice (ice volume in the North pole is simply plummeting) incidentally leads to more blocking patterns overhere in winter, where Siberian cold can reach us. It always could BTW and did so more frequently in the past. But it went away and now seems to come back as it is forecasted to do. Not every year, butmore forequently. So a wetter, warmer climate but with more severe coldsnaps? who knows.

My point was mainly that we have a rainy summer with excellent results for our conifers!

All I was going to contribute here is what Will already noted...the hotter/drier summers in at least parts of the CONUS (for the mid-Atlantic btw, this was also true in 2010...in 20+ years of gardening, I've never experienced a 3 year stretch this bad for heat & drought) are being translated to wetter, somewhat cooler summers in BOTH adjacent maritime climates.

I'm very concerned...I like a lush, Asian conifer/BLE/fern looking garden. I just can't get excited about growing cacti and agaves! In my county there are many mature ironclad rhododendrons in full sun...around 10' or taller. They would never have established in the past if such crappy summers had been the norm.

BUT we know things should seek the mean soon, right? Funny enough the switch from 1970-2000 to 1980-2010 NOAA climate norms showed my area actually getting 1F cooler in summer and very slightly wetter.

Here is a link that might be useful:

As for "the Netherlands getting wetter"...at least one person I know who's given a lot of thought to this believes that the PNW is slowly getting wetter in summer, too, which is why wild Arbutus menziesii are dying in situ more frequently. That could also be because of pathogens, though.