This report describes the historical weather record at the Tennant Creek Airport (Tennant Creek, Australia) during 2013. This station has records back to January 1957.
Tennant Creek has a hot semi-arid steppe climate. The area within 25 mi of this station is covered by shrublands (100%)
Daylight saving time (DST) was not observed at Tennant Creek during 2013.
2013 was not a leap year, so it has 365 days and no February 29th. The first leap year before 2013 was 2012 and the first after was 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 2013 they occurred on:
|Spring Equinox||Sunday, 22 September 2013.|
|Summer Solstice||Saturday, 21 December 2013.|
|Fall Equinox||Wednesday, 20 March 2013.|
|Winter Solstice||Friday, 21 June 2013.|
The hottest day of 2013 was January 25, with a high temperature of 109°F. For reference, on that day the average high temperature is 96°F and the high temperature exceeds 103°F only one day in ten. The hottest month of 2013 was January with an average daily high temperature of 102°F.
Relative to the average, the hottest day was May 21. The high temperature that day was 93°F, compared to the average of 78°F, a difference of 15°F. In relative terms the warmest month was January, with an average high temperature of 102°F, compared to an typical value of 96°F.
The longest warm spell was from March 1 to March 29, constituting 29 consecutive days with warmer than average high temperatures. The month of January had the largest fraction of warmer than average days with 94% days with higher than average high temperatures.
The coldest day of 2013 was June 23, with a low temperature of 46°F. For reference, on that day the average low temperature is 54°F and the low temperature drops below 48°F only one day in ten. The coldest month of 2013 was July with an average daily low temperature of 58°F.
Relative to the average, the coldest day was August 23. The low temperature that day was 52°F, compared to the average of 61°F, a difference of 9°F. In relative terms the coldest month was February, with an average low temperature of 76°F, compared to an typical value of 76°F.
The longest cold spell was from February 8 to February 14, constituting 7 consecutive days with cooler than average low temperatures. The month of February had the largest fraction of cooler than average days with 50% days with lower than average low temperatures.
This station did not reliably report the cloud coverage during 2013 but there is enough reported data to warrant the inclusion of the following graphs.
The cloudiest month of 2013 was May, with 19% of days being more cloudy than clear. The longest spell of cloudy weather was from May 15 to May 19, constituting 5 consecutive days that were cloudier than they were clear.
Either snow is exceptionally rare at this location or this station did not reliably report it during 2013.
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 2013 was October with an average daily low humidity of 7%, and the most humid month was May with an average daily low humidity of 29%.
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 2013, January had 2 dry days, 11 comfortable days, and 18 humid days; April had 11 dry days, 19 comfortable days, and no humid days; July had 25 dry days, 6 comfortable days, and no humid days; and October had 23 dry days, 7 comfortable days, and 1 humid day.
The highest sustained wind speed was 30 mph, occurring on January 15; the highest daily mean wind speed was 17 mph (July 8); and the highest wind gust speed was 49 mph (March 28).
The windiest month was July, with an average wind speed of 11 mph. The least windy month was February, with an average wind speed of 9 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 2013 with the lowest average visibility was September 27, with an average visibility of 4.5 mi. The month with the lowest average visibility was October, with an average visibility of 6.1 mi. With an average visibility of 6.2 mi, the month of January 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 2013 with the lowest average cloud ceiling was May 17, with an average cloud ceiling of 4113'. The month with the lowest average cloud ceiling was May, with an average cloud ceiling of 7160'. The month of September has the highest average cloud ceiling, with an average cloud ceiling of 11240'.