December weather forecastMcKinney, TX
December
Weather in December
December ends the year on a colder note with the temperature further sliding down to 54.5°F (12.5°C) during the day. McKinney in December has an unmistakably winter feel, with brief snowfalls making a guest appearance. The days are shorter with reduced sunshine hours, and the nightlife gains prominence amidst the holiday festivities. Additionally, wind speeds remain relatively high, giving the weather a chilly edge. With a minimal amount of rainfall, December carries a blanket of winter allure and warm cheerful spirits, encapsulating the year on a note of serenity and peace.Temperature
With December's arrival, McKinney's weather changes as the average high-temperature falls from an enjoyable 63.5°F (17.5°C) in November to a fresh 54.5°F (12.5°C). McKinney reports an average nighttime low-temperature of 40.3°F (4.6°C) in December.Humidity
In McKinney, the average relative humidity in December is 71%.Rainfall
In McKinney, in December, during 9.4 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In McKinney, Texas, during the entire year, the rain falls for 144.7 days and collects up to 33.54" (852mm) of precipitation.Snowfall
Months with snowfall are January, February, November and December. In McKinney, in December, snow falls for 0.3 days, with typically accumulated 0.08" (2mm) of snow. In McKinney, Texas, during the entire year, snow falls for 3.1 days and aggregates up to 1.1" (28mm) of snow.Daylight
December has the shortest days of the year in McKinney, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 7:12 am and sunset at 5:19 pm. On the last day of December, sunrise is at 7:29 am and sunset at 5:29 pm CST.
Sunshine
The month with the least sunshine in McKinney is December, with an average of 5.6h of sunshine.UV index
The months with the lowest UV index in McKinney are January, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 3 during December morphs into the following directions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
McKinney, TX
- Average high temperature in December: 54.5°F
The warmest month (with the highest average high temperature) is August (94.8°F).
The month with the lowest average high temperature is January (53.2°F).
- Average low temperature in December: 40.3°F
The month with the highest average low temperature is August (75.2°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).
Average pressure in December
McKinney, TX
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
McKinney, TX
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in December
McKinney, TX
- Average humidity in December: 71%
The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is August (59%).
Average rainfall in December
McKinney, TX
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is October (4.17").
The driest month (with the least rainfall) is January (1.77").
Average rainfall days in December
McKinney, TX
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
McKinney, TX
- Average snowfall in December: 0.08"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in December
McKinney, TX
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
McKinney, TX
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 5h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in December
McKinney, TX
- Average sunshine days in December: 19.6 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is September (13.6 days).
Average UV index in December
McKinney, TX
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in December
McKinney, TX
- Average cloud cover in December: 38
The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in December
McKinney, 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).
