June 2010 sets warmth record in Washington D.C.
* Is the heat returning for the 4th? Full Forecast *
The speculation is over, it's official. Even with a somewhat chilled final day of the month, June 2010 finished as the warmest on record for both D.C. and Dulles. Our recent streak of hot weather ended up as one of the longest heat waves for this early in the season and contributed to a record-tying number of June days at or above 90 -- 7 of which finished above 95 and one at 100. Two daily record highs were set during the month as well.
Keep reading for more stats on our record warm June. And what does July usually offer?
With an average temperature of 80.6 degrees, Washington surpassed the old June record by over a degree, making it the warmest June since records began in 1871. At Dulles, where climate records are much shorter and date to 1963, the average temperature of 76.8 degrees beat the previous record of 76.1 degrees set back in 1994. Baltimore-Washington (BWI) was able to hit 100 two times in June and finish with an average temperature an astounding 7 degrees above normal but failed to set a new record for June warmth. Instead, BWI finished #2 for June, behind 1943 (avg: 79.8), with an average temperature of 78.8 degrees.
D.C. finished the month with 18 days at or above 90 degrees, tying the total in 1943, the (now) third warmest June on record at D.C. When adding in the 2 occurrences in April and the 3 in May, D.C. has recorded 23 days of 90+ this year. With two full months left in meteorological summer, we are about 10 days off the typical June-August number and have already surpassed last year's total by 1.
Looking forward to July: D.C.'s long-term (1872-2009) average for July 90+ days is 11.7, while the shorter term (1971-2000) climate normal is 14.5 days. There is not a significant correlation between a warm June and a warm July. However, the pattern of recent appears to want to re-assert itself for at least a while. Starting this weekend, we should enter our next stretch of more days of 90+ heat.
Days at-or-above 90 through June 30 at National Airport: 6/29, 92F; 6/28, 97F; 6/27, 99F (record); 6/26, 95F; 6/25, 92F; 6/24, 100F (record); 6/23, 97F; 6/22, 96F; 6/21, 93F; 6/20, 95F; 6/19, 93F; 6/14, 91F; 6/13, 94F; 6/12, 93F; 6/10, 90F; 6/6, 91F; 6/5, 91F; 6/3, 92F; 5/31, 91F; 5/27, 93F; 5/26, 90F; 4/7, 90F; 4/6, 90F
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