I live near Leadville, Colorado which is 10,152 feet above sea level. We can have frosts all year. I remember one year when it snowed on the 4th of July. We even watched the fireworks in the snow. :lol: As for this year, we have had a lot of frosts during the summer. We had 28F on June 28th, 32F on July 29th, 30F on August 17th, and 29F on August 19th. Everynight has been below freezing here since August 29th. This has actually been one of our warmer summers too. We have had 17F in June, and 23F in July and August. I am sure there are colder places but frosts are common here throughout the summer (and I hate cold :lol: ).