June 2017 was close to average temperature-wise (+0.6 degrees) and rainfall was close to average as well (4.76" vs. average of 4.41"), but as so often happens with averages, they masked the true "personality" of the month. Specifically, the first nine days were six degrees cooler than average, and then the rest of the month was three degrees warmer than average; meanwhile, after less than half an inch of rain fell thru June 16, the remaining two weeks were on the rainy side, with more than four inches measured.
The highlights of the month occurred mostly during two eight-day periods. The first, from June 6-13, pertained to temperature, with two days that were 10 degrees or more below average (highs in the 50s and 60s) quickly followed by three that were 10+ degrees above average (highs in the 90s). The month's coolest and hottest days (based on daily mean temperature) were at the beginning and end of this eight-day period: a high/low of 58/52 on 6/6 (fourteen degrees below average) and 94/77 on 6/13 (fifteen degrees above average). The second eight-day period was rain-related, most of which fell during three downpours of an inch or more on 6/17, 6/19 and 6/24; these periods of heavy rain each lasted two to three hours.
Some additional observations:
- The month's average high of 79.3° was right at the average, but the average low was 1.1 degree warmer than average. This was largely due to ten days having lows of 70° or warmer, double the typical number - only four other years have had more.
- After three days in a row of 90-degree temperatures in May (5/17-19), the next twenty days saw no highs of 80° or warmer. In fact, the first 80-degree day in June, on 6/9, was the deepest into June with no 80-degree days since 2003, when it happened on 6/10.
- Five days in a row had measurable rain from 6/2-6, but only 0.19" was measured, the smallest amount to fall during five consecutive days since March 1982.
- On average there are four or five days with highs of 88° or 89° before the sixth day in the 90s occurs, but this year there were no such days - the first time this has happened since 1995. By contrast, last year had seven such days before the sixth high in the 90s occurred, 2015 had twelve, and 2014 had eight.
- Four days in a row, 6/20-23, had a high of 83°. Then, after a high of 84° on 6/24, there was another high of 83° on 6/25.
- Father's Day (6/18) and Gay Pride Day (6/25) had similar conditions, with partly cloudy skies and highs/lows of 85/70 and 83/68, respectively.
Here are links to previous June recaps: