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Weather in December in Port Arthur, Tx

< December >
	Normal Max/ High Temperature	18°C (64°F)
	Average Temperature	12°C (54°F)
	Min/ Low Temperature	7°C (44°F)
	Normal Precipitation	122mm (4.8in)
	Average Daylight per day	10h 13'
	Sun altitude at solar noon on the 21st day.	36.6°

The average temperature in Port Arthur, Tx in December is quite mild at 12.4 °C (54.32 °F).
Afternoons can be very mild with average high temperatures reaching 17.9 °C (64.2 °F).
Overnight temperatures are generally a little cool with an average low of 6.8 °C (44.2 °F).
The range/ variation of diurnal average temperatures in December is 11.1 °C (20 °F).
Precipitation averages for December are high with 122.2mm (4.8 in) recorded.
The shortest day is 10h 11' long and the longest day is 10h 19' long with an average length of 10h 13'.

Weather Trend Graph for December in Port Arthur, Tx, Usa

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