December weather forecastPasadena, TX
December
Weather in December
Welcoming the advent of winter, December in Pasadena offers cooler temperature ranges from 50.2°F (10.1°C) to 62.8°F (17.1°C). The change is clear as the length of daylight shrinks, and winter's shorter, cooler days become the norm. While inviting a cold wind, the month transitions from the gentler moods of November. Despite winter's arrival, snow is nearly nonexistent, indicating the relative mildness of Pasadena's winter. As the year draws to a close, the city prepares to enter January, repeating the cycle of charming seasonal transitions.Temperature
The move into December indicates a slight reduction in the average high-temperature, down from November's agreeable 70.2°F (21.2°C) to a comfortable 62.8°F (17.1°C). Pasadena experiences an average temperature drop to a fresh 50.2°F (10.1°C) during December nights.Humidity
In Pasadena, the average relative humidity in December is 77%.Rainfall
In Pasadena, during December, the rain falls for 13.8 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, there are 190.8 rainfall days, and 41.93" (1065mm) of precipitation is accumulated.Snowfall
January and December are months with snowfall. The months with the most snowfall are January and December, with an average 0.04" (1mm) of accumulated snow.Daylight
The month with the shortest days is December, with an average of 10h and 18min of daylight.On the first day of December, sunrise is at 6:58 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:32 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 4.9h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 4 translates into these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. To guard against the harmful effects of the Sun, minimize exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Pasadena, TX
- Average high temperature in December: 62.8°F
The warmest month (with the highest average high temperature) is August (92.8°F).
The month with the lowest average high temperature is January (60.6°F).
- Average low temperature in December: 50.2°F
The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in December
Pasadena, TX
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Pasadena, TX
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest months (with the lowest average wind speed) are August and September (6.5mph).
Average humidity in December
Pasadena, TX
- Average humidity in December: 77%
The month with the highest relative humidity is February (79%).
The months with the lowest relative humidity are August and October (71%).
Average rainfall in December
Pasadena, TX
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is September (5.94").
The driest month (with the least rainfall) is February (1.89").
Average rainfall days in December
Pasadena, TX
- Average rainfall days in December: 13.8 days
The months with the highest number of rainy days are August and September (21.3 days).
The month with the least rainy days is January (12.3 days).
Average snowfall in December
Pasadena, TX
- Average snowfall in December: 0.04"
The months with the highest snowfall are January and December (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Pasadena, TX
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Pasadena, TX
- Average daylight in December: 10h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Pasadena, TX
- Average sunshine days in December: 14.2 days
The month with the most sunshine days is January (16.4 days).
The months with the least sunshine days are August and September (6.9 days).
Average UV index in December
Pasadena, TX
- Average UV index in December: 4
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in December
Pasadena, TX
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 27).
Average visibility in December
Pasadena, TX
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
