McKinney, TX weather in December
December in McKinney: cool, with some rain. Highs 57°F, lows 36°F, about 7 days with rain or snow and about 0.6 in of snow. It is one of the coolest months in McKinney.
- Normal high
- 57°F
- Normal low
- 36°F
- Wet days
- 7
- 3.3 in total
- Snowfall
- 0.6 in
- snow on the ground 1 day
How December changes from start to finish
| December 1 | December 31 | |
|---|---|---|
| Normal high | 61°F | 55°F |
| Normal low | 39°F | 34°F |
| Chance of a wet day | 22% | 23% |
| Sunrise / sunset | 7:11 am / 5:19 pm | 7:29 am / 5:29 pm |
| Daylight | 10.1 h | 10.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical December day
- 6 am42°Fdew point 36°F
- 9 am45°Fdew point 37°F
- Noon53°Fdew point 36°F
- 3 pm56°Fdew point 36°F
- 6 pm52°Fdew point 36°F
- 9 pm48°Fdew point 36°F
NOAA hourly normals (local standard time) from Dallas Ft Worth Airport (31 mi away); average wind 10 mph; clear or few clouds in 39% of daytime hours, mostly cloudy or overcast in 50%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F8 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow7 of 31
- Notable rainat least 0.10 in4 of 31
- Freezing nightslow 32°F or below14 of 31
- Snow on the groundsnow depth 1 in or more1 of 31
Average days per December, counted from daily records for each year 1991-2020.
Rain and snow in December
Normal precipitation is 3.3 in; a dry December brings about 1.3 in and a wet one about 4.8 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more. Normal snowfall is 0.6 in.
How December varies from year to year
- Warmest December, 1991-20202015: average high 63°F
- Coolest December2000: average high 47°F
- Wettest December1991: 9.6 in
- Driest December2005: 0.3 in
- Highest reading86°F (December 3, 2005)
- Lowest reading6°F (December 9, 2005)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
December compared with November and January
| November | December | January | |
|---|---|---|---|
| Normal high | 66°F | 57°F | 56°F |
| Normal low | 44°F | 36°F | 34°F |
| Wet days | 6 | 7 | 7 |
| Comfortable days | 15 | 8 | 8 |
| Daylight | 10.5 h | 10.0 h | 10.2 h |
Highs change by -9°F from November and -1°F into January.
Nearby alternatives in December
- Warmer: College Station, TX178 mi · high 63°F · 9 wet days
- Cooler: Oklahoma City, OK165 mi · high 50°F · 6 wet days
How McKinney ranks in December
- Normal high145th warmest of 378 cities; 35th of 38 in Texas
- Wet days118th driest of 378
- Comfortable days102nd most of 340
What to pack for McKinney in December
- A warm jacket – lows near 36°F, highs near 57°F
Heating and cooling
December has 579 heating degree days and 4 cooling degree days (base 65°F), 12% of the year's total heating and cooling demand.
Questions
How cold is McKinney in December?
The normal high is 57°F and the normal low is 36°F. From 1991 to 2020 the coldest December reading was 6°F (December 9, 2005).
Does it rain a lot in McKinney in December?
About 7 days in December have at least 0.01 in of precipitation, and the normal total is 3.3 in. The wettest December in 1991-2020 was in 1991 (9.6 in); the driest was in 2005 (0.3 in).
Does it snow in McKinney in December?
Yes. Normal snowfall in December is 0.6 in, and snow covers the ground on about 1 day.
Is December a good time to visit McKinney?
December ranks 8th of 12 months on our comfort score for McKinney (53 out of 100). It has about 8 comfortable days. The best months are March and April.
Where the numbers come from
- Temperature and frost dates: Mckinney Muni Airport (USW00053914), 1.9 mi SE of the city center, 580 ft (50 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: Frisco (USC00413370), 10 mi W of the city center, 747 ft (117 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Dallas Ft Worth Airport (USW00003927), 31 mi SW of the city center, 560 ft (70 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Dallas/Ft Worth International Airport (722590-03927), 31 mi SW of the city center, 544 ft (86 ft lower than the city). Hourly observations, 1991-2020.