This report describes the historical weather record at the Adak Airport (Mitchell Field) (Adak Island, Alaska, United States) during 1965. This station has records back to December 1947.
Adak Island, Alaska has a cool humid temperate climate with short cool summers and no dry season. The area within 25 mi of this station is covered by oceans and seas (88%), tundra (10%), and shrublands (3%)
Daylight saving time (DST) was not observed at Adak Island, Alaska during 1965.
1965 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1965 was 1964 and the first after was 1968.
The summer and winter solstices and the spring and fall equinoxes mark the passing of the seasons. They fall on nearly the same day each year, with differences of a day or two depending on the year. In 1965 they occurred on:
|Spring Equinox||Saturday, 20 March 1965.|
|Summer Solstice||Monday, 21 June 1965.|
|Fall Equinox||Thursday, 23 September 1965.|
|Winter Solstice||Wednesday, 22 December 1965.|
The hottest day of 1965 was July 25, with a high temperature of 67°F. For reference, on that day the average high temperature is 54°F and the high temperature exceeds 58°F only one day in ten. The hottest month of 1965 was August with an average daily high temperature of 57°F.
Relative to the average, the hottest day was November 10. The high temperature that day was 54°F, compared to the average of 41°F, a difference of 13°F. In relative terms the warmest month was April, with an average high temperature of 44°F, compared to an typical value of 40°F.
The longest warm spell was from March 14 to April 22, constituting 40 consecutive days with warmer than average high temperatures. The month of April had the largest fraction of warmer than average days with 90% days with higher than average high temperatures.
The coldest day of 1965 was February 11, with a low temperature of 6°F. For reference, on that day the average low temperature is 30°F and the low temperature drops below 24°F only one day in ten. The coldest month of 1965 was January with an average daily low temperature of 28°F.
Relative to the average, the coldest day was February 11. The low temperature that day was 6°F, compared to the average of 30°F, a difference of 23°F. In relative terms the coldest month was September, with an average low temperature of 43°F, compared to an typical value of 44°F.
The longest cold spell was from June 3 to June 20, constituting 18 consecutive days with cooler than average low temperatures. The month of June had the largest fraction of cooler than average days with 67% days with lower than average low temperatures.
The clearest month of 1965 was April, with 10% of days being more clear than cloudy.
The cloudiest month of 1965 was June, with 100% of days being more cloudy than clear. The longest spell of cloudy weather was from May 8 to July 25, constituting 79 consecutive days that were cloudier than they were clear.
This station provides hourly reports of significant weather events at and around the station, but does not report the quantity of precipitation at the station itself. This is common for weather stations located outside of the United States, and for a small subset of stations in the United States that are located at lesser used and smaller airports.
This station reports when significant weather events (including precipitation) are visually observed at or near the station. Such events do not always correspond to measured quantities of liquid equivalent precipitation, such as when the event is near by not at the station, or in the case of solid precipitation that does not melt in the collection basin.
The day in 1965 with the most precipitation observations was January 4. There were 24 hourly weather reports that day (out of a maximum of 24) in which some form of precipitation was observated at or near the station. The month with the most precipitation observations was March, with 395 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from May 5 to May 13, constituting 9 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was May, with 29% of days reporting no observed precipitation at all.
In this section we consider only those weather reports that indicate liquid precipitation. For the purposes of this analysis, we include thunderstorms even though some thunderstorms are not accompanied by liquid precipitation.
The month of 1965 with the largest number of those reports was September, with a total of 360 reports. The day with the largest number of those reports was January 4, with a total of 24 reports.
This station reports when snow is observed falling but does not report the quantity of snow that has fallen or the depth of snow on the ground.
In this section we consider hourly weather reports that contain an observation of falling snow. These reports do not necessarily correspond to accumulation.
The first reported snow fall in 1965 was on October 2; the last was on May 4. The month of 1965 with the largest number of those reports was February, with a total of 227 reports. The day with the largest number of those reports was February 21, with a total of 24 reports.
Humidity is an important factor in determining how weather conditions feel to a person experiencing them. Hot and humid days feel even hotter than hot and dry days because the high level of water content in humid air discourages the evaporation of sweat from a person's skin.
When reading the graph below, keep in mind that the hottest part of the day tends to be the least humid, so the daily low (brown) traces are more relevant for understanding daytime comfort than the daily high (blue) traces, which typically occur during the night. Applying that observation, the least humid month of 1965 was October with an average daily low humidity of 62%, and the most humid month was July with an average daily low humidity of 75%.
But it is important to keep in mind that humidity does not tell the whole picture and the dew point is often a better measure of how comfortable a person will find a given set of weather conditions. Please see the next section for continued discussion of this point.
Dew point is the temperature below which water vapor will condense into liquid water. It is therefore also related to the rate of evaporation of liquid water. Since the evaporation of sweat is an important cooling mechanism for the human body, the dew point is an important measurement for understanding how dry, comfortable, or humid a given set of weather conditions will feel.
Generally speaking, dew points below 50°F will feel a bit dry to some people, but comfortable to people accustomed to dry conditions; dew points from 50°F to 68°F are fairly comfortable to most people, and dew points above 68°F are increasingly uncomfortable, becoming oppressive around 77°F.
To take some examples, and basing our categorization on the daily high dew point in 1965, January had 31 dry days, no comfortable days, and no humid days; April had 30 dry days, no comfortable days, and no humid days; July had 24 dry days, 7 comfortable days, and no humid days; and October had 31 dry days, no comfortable days, and no humid days.
The highest sustained wind speed was 52 mph, occurring on November 13; the highest daily mean wind speed was 37 mph (December 8);
The windiest month was November, with an average wind speed of 17 mph. The least windy month was June, with an average wind speed of 8 mph.
Visibility is the maximum distance at which a given reference object or light can be clearly discerned. In the United States, visibilities that are greater than or equal to 10 miles are typically reported as 10 miles.
The day of 1965 with the lowest average visibility was March 8, with an average visibility of 0.6 mi. The month with the lowest average visibility was March, with an average visibility of 6.0 mi. With an average visibility of 8.1 mi, the month of May had the highest average visibility.
The cloud ceiling is the altitude of the lowest layer of clouds that are at categorized as broken (mostly cloudy) or overcast (cloudy). If no such cloud layer exists then the ceiling is unlimited and no value is reported.
The day of 1965 with the lowest average cloud ceiling was April 19, with an average cloud ceiling of 49'. The month with the lowest average cloud ceiling was July, with an average cloud ceiling of 1328'. The month of October has the highest average cloud ceiling, with an average cloud ceiling of 4022'.