Not 1 Day W. Below-Avg Temperature For Anchorage Since 5/30/19; Hottest Hawaii Summer On Record
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The Summer of 2019: Hawaii
Of the 92 days of summer (June 1-Aug. 31), 29 saw daily record highs set or tied. A total of 37 daily “max/min” records (warmest daily low temperature) were set, including minimums of 81° on Aug. 2, 3, and 26 that tied the all-time records for such (set on three other occasions in August and September 2015). On September 5 the all-time max/min temperature record was broken when a daily low of 82° was observed.
Why has it been so hot in Hawaii this summer? The simple answer is that the sea surface temperatures have been running about 1.0°C-1.5°C (1.8°F-2.7°F) above average this past summer. As noted above, that is enough to push land temperatures (especially at sites near the ocean as all of the four listed above are) into record-breaking territory. The local press has also mentioned (anecdotally) that the normally brisk trade winds have been weaker this summer than usual, allowing the air temperature to climb higher than is normally seen and allowing heat to build near the top of the ocean surface.
September is usually the warmest month for the state, both for sea surface temperatures and land locations, and so far (as of September 8) record temperatures (both daily highs and lows) has continued unabated.
Anchorage International Airport Top 20 warmest summers. In 2019 it was by far the warmest summer on record for the city of Anchorage. Every month was respectively its hottest ever observed: June averaged 60.5° (previous record 59.5° in 2015), July averaged 65.3°, the warmest single month on record (previously 62.7° in 2016, and August averaged 62.6°, the third warmest single month on record (previously 61.2° in 2004). Data: NCEI. Graphic: Brian Brettschneider
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Temperature departures for Alaska during the climatological summer (June-August) 2019. Virtually all of the locations in the two darkest red zones in the map above (departures of +4°F or more) experienced their warmest summer on record. Data: NCEI. Graphic: Brian Brettschneider
Incredibly, Anchorage has not had even one day with a below-average temperature since May 30. A statistic that really stands out (among many) is that Anchorage has had 31 days of temperatures 75° or higher so far this year. The previous record for this was just 15 (in 2015)!
It should also be mentioned that this has also been the driest summer on record for Anchorage, with a June-August precipitation total of only .90” (normal would be 5.86”). June with just .06” and August with just .04” were both the driest such months on record. It should be noted that August is usually Anchorage’s wettest month of the year, with 3.25” of rainfall. A serious drought continues in Southeast Alaska as well where Yakutat (1.05”) and Sitka (1.63”) also had their driest Augusts on record.
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https://desdemonadespair.net/2019/09/hawaiis-warmest-summer-on-record-and-alaskas-second-warmest-in-2019.html