McKinney weather in December: McKinney, Texas: normal highs, lows, rain and records for December
McKinney in December has a normal high of 57°F and a normal low of 36°F, a daily mean of 47°F, falling from 61°F on the 1st to 55°F by the 31st. Measurable precipitation falls on 7 days in a normal December, 3.49 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of 2°C, 89 mm of precipitation in December.
- NOAA stationMcKinney Municipal Airport
- Station IDUSW00053914
- Location33.18°N 96.59°W
- Elevation580 ft (177 m)
- Population227,526
- Jan 56° 34°
- Feb 60° 38°
- Mar 68° 46°
- Apr 75° 53°
- May 83° 62°
- Jun 91° 70°
- Jul 95° 74°
- Aug 96° 73°
- Sep 88° 66°
- Oct 78° 54°
- Nov 66° 44°
- Dec 57° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is McKinney in December?
The normal high is 57°F and the normal low 36°F, for a daily mean of 46.5°F. December is 8.4°F cooler than November and 1.8°F warmer than January. December is the 11th warmest month of the year in McKinney and the 6th wettest. Across the month the normal high falls 6°F, from 61°F on December 1 to 55°F on December 31. From one year to the next December's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 44°F and 49°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 23%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 61°F | 39°F | 23% | 14% |
| December 8 | 59°F | 37°F | 23% | 14% |
| December 15 | 57°F | 36°F | 23% | 14% |
| December 22 | 56°F | 35°F | 22% | 13% |
| December 31 | 55°F | 34°F | 21% | 13% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 61°F | 39°F | 23% | 14% | 10 h 10 min |
| December 2 | 61°F | 39°F | 23% | 14% | 10 h 10 min |
| December 3 | 60°F | 39°F | 23% | 14% | 10 h 10 min |
| December 4 | 60°F | 38°F | 23% | 14% | 10 h 10 min |
| December 5 | 60°F | 38°F | 23% | 14% | 10 h |
| December 6 | 59°F | 38°F | 23% | 14% | 10 h |
| December 7 | 59°F | 38°F | 23% | 14% | 10 h |
| December 8 | 59°F | 37°F | 23% | 14% | 10 h |
| December 9 | 58°F | 37°F | 23% | 14% | 10 h |
| December 10 | 58°F | 37°F | 23% | 14% | 10 h |
| December 11 | 58°F | 37°F | 23% | 14% | 10 h |
| December 12 | 58°F | 36°F | 23% | 14% | 10 h |
| December 13 | 57°F | 36°F | 23% | 14% | 10 h |
| December 14 | 57°F | 36°F | 23% | 14% | 10 h |
| December 15 | 57°F | 36°F | 23% | 14% | 10 h |
| December 16 | 57°F | 36°F | 23% | 14% | 10 h |
| December 17 | 57°F | 35°F | 23% | 14% | 10 h |
| December 18 | 56°F | 35°F | 23% | 14% | 10 h |
| December 19 | 56°F | 35°F | 22% | 14% | 10 h |
| December 20 | 56°F | 35°F | 22% | 14% | 10 h |
| December 21 | 56°F | 35°F | 22% | 13% | 10 h |
| December 22 | 56°F | 35°F | 22% | 13% | 10 h |
| December 23 | 56°F | 34°F | 22% | 13% | 10 h |
| December 24 | 55°F | 34°F | 22% | 13% | 10 h |
| December 25 | 55°F | 34°F | 22% | 13% | 10 h |
| December 26 | 55°F | 34°F | 22% | 13% | 10 h |
| December 27 | 55°F | 34°F | 22% | 13% | 10 h |
| December 28 | 55°F | 34°F | 22% | 13% | 10 h |
| December 29 | 55°F | 34°F | 21% | 13% | 10 h |
| December 30 | 55°F | 34°F | 21% | 13% | 10 h |
| December 31 | 55°F | 34°F | 21% | 13% | 10 h |
- Normal high
- 57°FDecember average
- Normal low
- 36°FDecember average
- Precipitation
- 3.49 inmonth total
- Days with precipitation
- 70.01 inch or more
- Nights at 32°F or colder
- 14
- Daylight
- 10 h 10 min to 10 hDecember 1 to December 31
- Days at 70°F or more
- 5
- Sunshine
- 73%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053914; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in McKinney in December?
On a given December day the chance of 0.01 inch or more is 23% on average, highest around December 8 (23%). In all, 3.49 in falls on 7 days of a normal December, 1 of them with an inch or more.
In a normal December in McKinney, 14 nights fall to freezing and 1 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053914.
What are the records for December in McKinney?
The warmest December temperature on this station's record (since 1998) is 86°F, on December 3, 2005; the coldest is 6°F, on December 9, 2005. The wettest December brought 6.35 in (2015).
The December mean against the 1991-2020 normal of 46.5°F: 2021 59.1°F (+12.6), 2022 48.4°F (+1.9), 2023 49.9°F (+3.4), 2024 51.3°F (+4.8), 2025 51.4°F (+4.9). 5 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 59.1°F | +12.6°F | 1.04 in |
| 2022 | 48.4°F | +1.9°F | 2.38 in |
| 2023 | 49.9°F | +3.4°F | 3.27 in |
| 2024 | 51.3°F | +4.8°F | 4.22 in |
| 2025 | 51.4°F | +4.9°F | 0.06 in |
Source: records: ACIS, station USW00053914; recent months: ACIS, station USW00053914. Records and recent months use complete months only.
How does December in McKinney compare across Texas?
Across the 321 places PlainClimate covers in Texas, December normal highs run from 49°F in Dumas to 74°F in Brownsville; McKinney's is 57°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.