This report describes the historical weather record at the Keesler Air Force Base (Biloxi, Mississippi, United States) during 1949. 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 1949. There were two time changes during 1949:
1949 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1949 was 1948 and the first after was 1952.
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 1949 they occurred on:
|Spring Equinox||Sunday, 20 March 1949.|
|Summer Solstice||Tuesday, 21 June 1949.|
|Fall Equinox||Friday, 23 September 1949.|
|Winter Solstice||Thursday, 22 December 1949.|
The hottest day of 1949 was June 30, with a high temperature of 97°F. For reference, on that day the average high temperature is 90°F and the high temperature exceeds 93°F only one day in ten. The hottest month of 1949 was August with an average daily high temperature of 90°F.
Relative to the average, the hottest day was January 11. The high temperature that day was 80°F, compared to the average of 59°F, a difference of 21°F. In relative terms the warmest month was January, with an average high temperature of 66°F, compared to an typical value of 60°F.
The longest warm spell was from October 7 to October 26, constituting 20 consecutive days with warmer than average high temperatures. The month of February had the largest fraction of warmer than average days with 86% days with higher than average high temperatures.
The coldest day of 1949 was January 31, with a low temperature of 30°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 1949 was November with an average daily low temperature of 49°F.
Relative to the average, the coldest day was March 19. The low temperature that day was 36°F, compared to the average of 57°F, a difference of 21°F. In relative terms the coldest month was March, with an average low temperature of 53°F, compared to an typical value of 55°F.
The longest cold spell was from May 24 to June 12, constituting 20 consecutive days with cooler than average low temperatures. The month of August had the largest fraction of cooler than average days with 71% days with lower than average low temperatures.
The clearest month of 1949 was November, with 83% of days being more clear than cloudy. The longest spell of clear weather was from November 1 to November 11, constituting 11 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1949 was February, with 50% of days being more cloudy than clear. The longest spell of cloudy weather was from March 26 to April 5, 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 1949 with the most precipitation observations was December 14. There were 23 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 87 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from November 14 to December 7, constituting 24 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was November, 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 68% of days reporting some observed precipitation.
Either snow is exceptionally rare at this location or this station did not reliably report it during 1949.
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 1949 was November with an average daily low humidity of 44%, and the most humid month was September with an average daily low humidity of 85%.
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 1949, January had 6 dry days, 15 comfortable days, and 10 humid days; April had 1 dry day, 19 comfortable days, and 10 humid days; July had no dry days, no comfortable days, and 31 humid days; and October had no dry days, 3 comfortable days, and 28 humid days.
The highest sustained wind speed was 52 mph, occurring on August 20; the highest daily mean wind speed was 21 mph (December 15);
The windiest month was December, with an average wind speed of 11 mph. The least windy month was August, with an average wind speed of 7 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 1949 with the lowest average visibility was December 19, with an average visibility of 0.4 mi. The month with the lowest average visibility was February, with an average visibility of 6.0 mi. With an average visibility of 11.0 mi, the month of August 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 1949 with the lowest average cloud ceiling was May 5, with an average cloud ceiling of 0'. The month with the lowest average cloud ceiling was November, with an average cloud ceiling of 4457'. The month of June has the highest average cloud ceiling, with an average cloud ceiling of 17724'.