This report describes the historical weather record at the Keesler Air Force Base (Biloxi, Mississippi, United States) during 1963. This station has records back to December 1947.
Biloxi, Mississippi 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 (49%), oceans and seas (40%), and croplands (10%)
Daylight saving time (DST) was observed at Biloxi, Mississippi during 1963. There were two time changes during 1963:
1963 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1963 was 1960 and the first after was 1964.
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 1963 they occurred on:
|Spring Equinox||Thursday, 21 March 1963.|
|Summer Solstice||Saturday, 22 June 1963.|
|Fall Equinox||Monday, 23 September 1963.|
|Winter Solstice||Sunday, 22 December 1963.|
The hottest day of 1963 was July 22, with a high temperature of 94°F. For reference, on that day the average high temperature is 89°F and the high temperature exceeds 92°F only one day in ten. The hottest month of 1963 was August with an average daily high temperature of 89°F.
Relative to the average, the hottest day was October 28. The high temperature that day was 85°F, compared to the average of 74°F, a difference of 11°F. In relative terms the warmest month was October, with an average high temperature of 80°F, compared to an typical value of 79°F.
The longest warm spell was from August 24 to September 14, constituting 22 consecutive days with warmer than average high temperatures. The month of April had the largest fraction of warmer than average days with 70% days with higher than average high temperatures.
The coldest day of 1963 was January 24, with a low temperature of 10°F. For reference, on that day the average low temperature is 44°F and the low temperature drops below 35°F only one day in ten. The coldest month of 1963 was December with an average daily low temperature of 35°F.
Relative to the average, the coldest day was January 24. The low temperature that day was 10°F, compared to the average of 44°F, a difference of 34°F. In relative terms the coldest month was December, with an average low temperature of 35°F, compared to an typical value of 47°F.
The longest cold spell was from February 8 to March 4, constituting 25 consecutive days with cooler than average low temperatures. The month of February had the largest fraction of cooler than average days with 89% days with lower than average low temperatures.
The clearest month of 1963 was October, with 71% of days being more clear than cloudy. The longest spell of clear weather was from October 7 to October 21, constituting 15 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1963 was January, with 65% of days being more cloudy than clear. The longest spell of cloudy weather was from March 8 to March 20, constituting 13 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 1963 with the most precipitation observations was December 31. There were 22 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 December, with 98 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from April 8 to April 26, constituting 19 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was October, with 90% of days reporting no observed precipitation at all.
The month with the largest fraction of days with at least some observed precipitation was July, 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 1963 with the largest number of those reports was June, with a total of 81 reports. The day with the largest number of those reports was September 17, 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 1963 was on December 20; the last was on December 31. The month of 1963 with the largest number of those reports was December, with a total of 21 reports. The day with the largest number of those reports was December 31, with a total of 18 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 1963 was October with an average daily low humidity of 44%, and the most humid month was July with an average daily low humidity of 64%.
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 1963, January had 15 dry days, 16 comfortable days, and no humid days; April had no dry days, 14 comfortable days, and 16 humid days; July had no dry days, no comfortable days, and 31 humid days; and October had 2 dry days, 22 comfortable days, and 7 humid days.
The highest sustained wind speed was 30 mph, occurring on February 2; the highest daily mean wind speed was 20 mph (February 3); and the highest wind gust speed was 22 mph (November 1).
The windiest month was April, with an average wind speed of 10 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 1963 with the lowest average visibility was February 1, with an average visibility of 0.2 mi. The month with the lowest average visibility was January, with an average visibility of 8.5 mi. With an average visibility of 11.5 mi, the month of July 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 1963 with the lowest average cloud ceiling was January 11, with an average cloud ceiling of 98'. The month with the lowest average cloud ceiling was January, with an average cloud ceiling of 19111'. The month of July has the highest average cloud ceiling, with an average cloud ceiling of 64122'.