This report describes the historical weather record at the Godman Army Airfield (Fort Knox, Kentucky, United States) during 1966. 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 1966. There were two time changes during 1966:
1966 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1966 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 1966 they occurred on:
|Spring Equinox||Monday, 21 March 1966.|
|Summer Solstice||Tuesday, 21 June 1966.|
|Fall Equinox||Friday, 23 September 1966.|
|Winter Solstice||Thursday, 22 December 1966.|
The hottest day of 1966 was July 14, with a high temperature of 97°F. For reference, on that day the average high temperature is 87°F and the high temperature exceeds 93°F only one day in ten. The hottest month of 1966 was July with an average daily high temperature of 89°F.
Relative to the average, the hottest day was January 2. The high temperature that day was 62°F, compared to the average of 42°F, a difference of 21°F. In relative terms the warmest month was July, with an average high temperature of 89°F, compared to an typical value of 86°F.
The longest warm spell was from June 20 to July 15, constituting 26 consecutive days with warmer than average high temperatures. The month of July had the largest fraction of warmer than average days with 74% days with higher than average high temperatures.
The coldest day of 1966 was January 30, with a low temperature of -12°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 1966 was January with an average daily low temperature of 20°F.
Relative to the average, the coldest day was January 30. The low temperature that day was -12°F, compared to the average of 25°F, a difference of 37°F. In relative terms the coldest month was January, with an average low temperature of 20°F, compared to an typical value of 26°F.
The longest cold spell was from January 23 to February 7, constituting 16 consecutive days with cooler than average low temperatures. The month of October had the largest fraction of cooler than average days with 84% days with lower than average low temperatures.
The longest freezing spell was from January 22 to February 1, constituting 11 consecutive days with temperatures strictly below freezing.
The clearest month of 1966 was October, with 58% of days being more clear than cloudy. The longest spell of clear weather was from October 24 to October 31, constituting 8 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1966 was February, with 82% of days being more cloudy than clear. The longest spell of cloudy weather was from April 18 to May 3, constituting 16 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 1966 with the most precipitation observations was January 1. 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 January, with 162 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from May 22 to June 6, constituting 16 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was October, 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 April, with 63% 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 1966 with the largest number of those reports was April, with a total of 129 reports. The day with the largest number of those reports was January 1, 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 1966 was on November 2; the last was on April 5. The month of 1966 with the largest number of those reports was January, with a total of 87 reports. The day with the largest number of those reports was November 2, with a total of 22 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 1966 was June with an average daily low humidity of 37%, and the most humid month was December with an average daily low humidity of 57%.
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 1966, January had 29 dry days, 2 comfortable days, and no humid days; April had 17 dry days, 13 comfortable days, and no humid days; July had no dry days, 10 comfortable days, and 21 humid days; and October had 23 dry days, 8 comfortable days, and no humid days.
The highest sustained wind speed was 32 mph, occurring on July 10; the highest daily mean wind speed was 16 mph (December 8);
The windiest month was March, with an average wind speed of 7 mph. The least windy month was June, with an average wind speed of 4 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 1966 with the lowest average visibility was January 22, with an average visibility of 1.9 mi. The month with the lowest average visibility was September, with an average visibility of 6.6 mi. With an average visibility of 9.9 mi, the month of March 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 1966 with the lowest average cloud ceiling was April 12, with an average cloud ceiling of 336'. The month with the lowest average cloud ceiling was February, with an average cloud ceiling of 3594'. The month of June has the highest average cloud ceiling, with an average cloud ceiling of 7029'.