Just three months after an exceptionally warm May, which was New York's second warmest on record, August 2015 crossed the finish line as third warmest. Although the number of 90-degree days, eight, was double the average, what really contributed to the month being so warm was the absence of any outbreaks of Canadian air masses. Every day had a high of 80° or warmer - a first for August (a typical August sees seven days with highs cooler than 80°.) Only four days had below-average mean temperatures; the most below average was just -1.5 degrees on two days. Below are a number of other noteworthy findings:
- An extended streak of 80-degree days that began on July 10 continued through August. By 8/31 it had grown to 53 days, making it the second longest such streak - and it was expected to eclipse 1944's all-time streak of 59 days (it did).
- The month was also characterized by plentiful sunshine, with 23 days that were either sunny or clear. Cloud cover is measured on a scale of 0 to 10, with 0 being clear and 10 overcast. August averaged a cloud cover rating of 2.1, making it the sunniest month of the past five years (this information is reported sporadically in prior years). This included sunny/clear sky conditions for the first nine days of the month as well as the final six days.
- Four years ago August 2011 became the wettest month on record, with 18.95" of rain measured. Since then the four Augusts that followed have all had less than three inches of rain. This August measured 2.35", about half the typical amount. Half of the month's rain poured down during the morning of 8/11.
- July (2.3 degrees above average) and August (3.8 degrees above average) rank as the fifth warmest July/August combo on record (tied with 1995). What makes 2015 stand out is that there were a lot less 90-degree days than the other July/August combos ranked in the top 10.
|FIVE HOTTEST AUGUSTS|
|HOTTEST JULY/AUG COMBOS|
|Mean Temp||Days of|