This report describes the historical weather record at the Chain Municipal Airport (Hattiesburg, Mississippi, United States) during the last 12 months. This station has records back to January 1973.
Hattiesburg, 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 (97%) and croplands (2%)
Daylight saving time (DST) was observed at Hattiesburg, Mississippi during the last 12 months. There were two time changes during the last 12 months:
2014 is not a leap year, so it has 365 days and no February 29th. The first leap year before 2014 was 2012 and the first after will be 2016.
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 2014 they occurred on:
|Spring Equinox||Thursday, 20 March 2014.|
|Summer Solstice||Saturday, 21 June 2014.|
|Fall Equinox||Tuesday, 23 September 2014.|
|Winter Solstice||Sunday, 21 December 2014.|
The hottest day of the last 12 months was August 24, with a high temperature of 99°F. For reference, on that day the average high temperature is 91°F and the high temperature exceeds 96°F only one day in ten. The hottest month of the last 12 months was August with an average daily high temperature of 93°F.
Relative to the average, the hottest day was December 5. The high temperature that day was 82°F, compared to the average of 63°F, a difference of 19°F. In relative terms the warmest month was October, with an average high temperature of 81°F, compared to an typical value of 79°F.
The longest warm spell was from August 18 to September 3, constituting 17 consecutive days with warmer than average high temperatures. The month of August had the largest fraction of warmer than average days with 74% days with higher than average high temperatures.
The coldest day of the last 12 months was January 30, with a low temperature of 13°F. For reference, on that day the average low temperature is 39°F and the low temperature drops below 28°F only one day in ten. The coldest month of the last 12 months was January with an average daily low temperature of 29°F.
Relative to the average, the coldest day was January 30. The low temperature that day was 13°F, compared to the average of 39°F, a difference of 26°F. In relative terms the coldest month was January, with an average low temperature of 29°F, compared to an typical value of 38°F.
The longest cold spell was from January 15 to January 27, constituting 13 consecutive days with cooler than average low temperatures. The month of January had the largest fraction of cooler than average days with 84% days with lower than average low temperatures.
The clearest month of the last 12 months was August, with 97% of days being more clear than cloudy. The longest spell of clear weather was from August 2 to September 13, constituting 43 consecutive days that were clearer than they were cloudy.
The cloudiest month of the last 12 months was February, with 57% of days being more cloudy than clear. The longest spell of cloudy weather was from December 3 to December 11, constituting 9 consecutive days that were cloudier than they were clear.
This station reports both the quantity of liquid precipitation and categorical observations of precipitation (e.g., moderate rain, or heavy snow). Both are subject to erroneous reports, but the former is particularly prone to false reports, especially ones indicating an excessive quantity of precipitation. Please bear this in mind when reading the extrema reported in this section.
The day with the largest quantity of precipitation was September 16. That day saw 3.952" of liquid (or liquid equivalent) precipitation, compared to a median value of 0.150". The month with the most precipitation was February, with 7.406", compared to a median value of 4.236".
As determined by quantitative measurements, the longest dry spell was from October 14 to November 6, constituting 24 consecutive days with no measured precipitation. The month with the largest fraction of dry days was October, with 87% of days reporting no measured precipitation at all.
The month with the largest fraction of days with at least some measured precipitation was June, with 57% of days reporting some measured precipitation.
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 the last 12 months with the most precipitation observations was December 28. 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 April, with 91 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from October 15 to November 6, constituting 23 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 August, with 61% 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 the last 12 months with the largest number of those reports was April, with a total of 91 reports. The day with the largest number of those reports was December 28, with a total of 21 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 the last 12 months was on January 23; the last was on February 6. The month of the last 12 months with the largest number of those reports was January, with a total of 5 reports. The day with the largest number of those reports was January 24, with a total of 2 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 the last 12 months was January with an average daily low humidity of 34%, and the most humid month was December 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 the last 12 months, December had 18 dry days, 8 comfortable days, and 5 humid days; March had 12 dry days, 19 comfortable days, and no humid days; June had no dry days, no comfortable days, and 30 humid days; and September had no dry days, 4 comfortable days, and 26 humid days.
The highest sustained wind speed was 30 mph, occurring on August 18; the highest daily mean wind speed was 15 mph (December 21); and the highest wind gust speed was 44 mph (March 28).
The windiest month was April, with an average wind speed of 7 mph. The least windy month was September, with an average wind speed of 3 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 the last 12 months with the lowest average visibility was December 8, with an average visibility of 2.7 mi. The month with the lowest average visibility was February, with an average visibility of 8.6 mi. With an average visibility of 9.6 mi, the month of November 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 the last 12 months with the lowest average cloud ceiling was May 20, with an average cloud ceiling of 150'. The month with the lowest average cloud ceiling was February, with an average cloud ceiling of 3499'. The month of August has the highest average cloud ceiling, with an average cloud ceiling of 6318'.