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Anchorage September 2015


Anchorage's September mean monthly temperature was 46.4°F, 2.2°F below the long term mean. The highest temperature for the month was 63°F on the 2nd, while the lowest was 28°F on the 24th.

Precipitation was 258% of normal, with 7.71" measured, and 2.99" expected. Four new daily precipitation records contributed to this: on the 8th the 1.19" that fell broke the old 1990 record for that day by 0.27", on the 15th the 0.94" that was measured broke the old 1962 record for that day of 0.61", on the 27th the 0.72" that was observed broke the old 1979 record by a mere 0.01", and finally 1.56" fell on the 29th, breaking the old 1961 record for that day by 0.35". This is also new record precipitation total for any day in September, breaking the old record of 1.21" from September 19, 2012. And it was the wettest September on record for Anchorage as the total of 7.71" broke the old 2004 record of 7.61". Snowfall was also heavier than normal, with 2.8" observed and a mere 0.4" expected. The average wind speed was 5.6 mph, while the highest wind speed of 38 mph blowing from a southeasterly direction occurred on the 10th.