Alaska Climate Research Center

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Ketchikan September 2011


Ketchikan's average temperature of 53.8°F in September was 1.3°F above the long-term mean. The highest temperature of the month measured 70°F on the 12th, while the low temperature of 40°F occurred on the 25th of the month. Even though the mean monthly temperature was somewhat above the expected value, the daily temperature ranges followed fairly closely the long-term means. No new temperature extremes were recorded. Monthly precipitation was heavy and totaled 28.33", slightly more than twice the expected amount of 13.79". Precipitation occurred on 28 days of the month. Of note was the 20th of the month, with a daily total of 5.00". Despite the heavy rainfall, no new precipitation records were set during the month.