This report describes the historical weather record at the Keesler Air Force Base (Biloxi, Mississippi, United States) during 1955. 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 1955. There were two time changes during 1955:
1955 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1955 was 1952 and the first after was 1956.
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 1955 they occurred on:
|Spring Equinox||Monday, 21 March 1955.|
|Summer Solstice||Wednesday, 22 June 1955.|
|Fall Equinox||Friday, 23 September 1955.|
|Winter Solstice||Thursday, 22 December 1955.|
The hottest day of 1955 was August 23, with a high temperature of 95°F. For reference, on that day the average high temperature is 89°F and the high temperature exceeds 93°F only one day in ten. The hottest month of 1955 was August with an average daily high temperature of 90°F.
Relative to the average, the hottest day was December 4. The high temperature that day was 79°F, compared to the average of 63°F, a difference of 16°F. In relative terms the warmest month was May, with an average high temperature of 85°F, compared to an typical value of 83°F.
The longest warm spell was from February 14 to March 7, constituting 22 consecutive days with warmer than average high temperatures. The month of February had the largest fraction of warmer than average days with 79% days with higher than average high temperatures.
The coldest day of 1955 was February 12, with a low temperature of 26°F. For reference, on that day the average low temperature is 44°F and the low temperature drops below 34°F only one day in ten. The coldest month of 1955 was January with an average daily low temperature of 43°F.
Relative to the average, the coldest day was March 27. The low temperature that day was 28°F, compared to the average of 59°F, a difference of 31°F. In relative terms the coldest month was June, with an average low temperature of 71°F, compared to an typical value of 75°F.
The longest cold spell was from June 6 to June 25, constituting 20 consecutive days with cooler than average low temperatures. The month of June had the largest fraction of cooler than average days with 93% days with lower than average low temperatures.
The clearest month of 1955 was October, with 87% of days being more clear than cloudy. The longest spell of clear weather was from October 9 to November 6, constituting 29 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1955 was January, with 32% of days being more cloudy than 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 1955 with the most precipitation observations was July 13. There were 21 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 August, with 78 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from April 22 to May 13, constituting 22 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was March, with 87% of days reporting no observed precipitation at all.
The month with the largest fraction of days with at least some observed precipitation was August, with 55% of days reporting some observed precipitation.
Either snow is exceptionally rare at this location or this station did not reliably report it during 1955.
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 1955 was October with an average daily low humidity of 48%, and the most humid month was February with an average daily low humidity of 63%.
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 1955, January had 14 dry days, 17 comfortable days, and no humid days; April had no dry days, 16 comfortable days, and 14 humid days; July had no dry days, no comfortable days, and 31 humid days; and October had 3 dry days, 15 comfortable days, and 13 humid days.
The highest sustained wind speed was 35 mph, occurring on March 26; the highest daily mean wind speed was 26 mph (March 26);
The windiest month was March, with an average wind speed of 14 mph. The least windy month was September, with an average wind speed of 6 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 1955 with the lowest average visibility was January 4, with an average visibility of 0.6 mi. The month with the lowest average visibility was February, with an average visibility of 8.1 mi. With an average visibility of 10.3 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 1955 with the lowest average cloud ceiling was November 13, with an average cloud ceiling of 23'. The month with the lowest average cloud ceiling was December, with an average cloud ceiling of 4761'. The month of June has the highest average cloud ceiling, with an average cloud ceiling of 18663'.