You're so far gone that you're suggesting June 15th snow isn't an extreme, you're insane dude. I lived in la pine in June 2008 and it did not snow, the latest I've seen snow in la pine/sunriver was May 25th 2012 when we got over an inch.
Was about to say the same. There are also multiple wunderground stations across the river at a similar Elevation, but I'm not sure how specific the temperature has to be, because those stations will get you within a couple degrees.