This won't surprise Oregonians and Washingtonians bummed out over our cold, wet spring. Which has extended into summer. Snow was falling at pass levels recently, and it's freaking June!
Almost everywhere in the United States but the northwest, temperatures have been warmer than average in 2012. In many places, record-breaking warmer. Our relatives in the mid-west have been bragging for months about going swimming in 80 degree weather.
Climate Progress tells the tale.
Spring 2012 beat 1910, which had held the title for record warm spring, by a healthy margin of 2°F. No doubt much of this was driven by the massive heat wave that gripped the country during March, but unusual warmth continued during April and May, albeit not as intense. Such warming trends are consistent with both the influence of manmade global warming, particularly the prevalence of record warm nighttime temperatures, and natural variability has also favored warmer-than-average conditions so far this year. Studies show that as greenhouse gases continue to increase in the atmosphere, the odds of heat extremes are growing as well.
According to NOAA’s National Climatic Data Center, the spring of 2012 “was the culmination of the warmest March, third warmest April, and second warmest May. This marks the first time that all three months during the spring season ranked among the 10 warmest, since records began in 1895.”