This report describes the historical weather record at the Godman Army Airfield (Fort Knox, Kentucky, United States) during 1965. This station has records back to December 1947.
Fort Knox, Kentucky has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by forests (83%), croplands (12%), and built-up areas (3%)
Daylight saving time (DST) was observed at Fort Knox, Kentucky during 1965. There were two time changes 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 August 18, with a high temperature of 98°F. For reference, on that day the average high temperature is 86°F and the high temperature exceeds 93°F only one day in ten. The hottest month of 1965 was August with an average daily high temperature of 87°F.
Relative to the average, the hottest day was February 9. The high temperature that day was 67°F, compared to the average of 43°F, a difference of 24°F. In relative terms the warmest month was May, with an average high temperature of 82°F, compared to an typical value of 75°F.
The longest warm spell was from April 30 to May 11, constituting 12 consecutive days with warmer than average high temperatures. The month of May had the largest fraction of warmer than average days with 84% days with higher than average high temperatures.
The coldest day of 1965 was January 31, with a low temperature of -9°F. For reference, on that day the average low temperature is 25°F and the low temperature drops below 10°F only one day in ten. The coldest month of 1965 was January with an average daily low temperature of 24°F.
Relative to the average, the coldest day was January 31. The low temperature that day was -9°F, compared to the average of 25°F, a difference of 34°F. In relative terms the coldest month was March, with an average low temperature of 30°F, compared to an typical value of 38°F.
The longest cold spell was from March 18 to April 5, constituting 19 consecutive days with cooler than average low temperatures. The month of March had the largest fraction of cooler than average days with 90% days with lower than average low temperatures.
The longest freezing spell was from January 29 to February 5, constituting 8 consecutive days with temperatures strictly below freezing.
The clearest month of 1965 was October, with 68% of days being more clear than cloudy. The longest spell of clear weather was from October 24 to November 3, constituting 11 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1965 was January, with 68% of days being more cloudy than clear. The longest spell of cloudy weather was from December 9 to December 19, constituting 11 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 March 4. There were 18 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 161 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from April 29 to May 10, constituting 12 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was August, with 77% of days reporting no observed precipitation at all.
The month with the largest fraction of days with at least some observed precipitation was March, with 65% of days reporting some observed precipitation.
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 March, with a total of 106 reports. The day with the largest number of those reports was October 20, with a total of 17 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 December 6; the last was on March 20. The month of 1965 with the largest number of those reports was March, with a total of 55 reports. The day with the largest number of those reports was January 16, with a total of 17 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 August with an average daily low humidity of 41%, and the most humid month was June with an average daily low humidity of 55%.
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 24 dry days, 7 comfortable days, and no humid days; April had 14 dry days, 15 comfortable days, and 1 humid day; July had no dry days, 9 comfortable days, and 22 humid days; and October had 15 dry days, 15 comfortable days, and 1 humid day.
The highest sustained wind speed was 29 mph, occurring on November 26; the highest daily mean wind speed was 18 mph (February 25);
The windiest month was April, with an average wind speed of 8 mph. The least windy month was July, with an average wind speed of 5 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 25, with an average visibility of 1.8 mi. The month with the lowest average visibility was March, with an average visibility of 7.8 mi. With an average visibility of 10.3 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 September 6, with an average cloud ceiling of 197'. The month with the lowest average cloud ceiling was March, with an average cloud ceiling of 3681'. The month of May has the highest average cloud ceiling, with an average cloud ceiling of 6944'.