McAllen, TX weather in December
December in McAllen: mild, with some rain. Highs 74°F, lows 54°F, rain on about 6 days. It is one of the coolest months in McAllen. A good month for most outdoor plans.
- Normal high
- 74°F
- Normal low
- 54°F
- Wet days
- 6
- 1.1 in total
- Muggy days
- 4
- dew point 65°F+
How December changes from start to finish
| December 1 | December 31 | |
|---|---|---|
| Normal high | 76°F | 72°F |
| Normal low | 57°F | 52°F |
| Chance of a wet day | 18% | 20% |
| Sunrise / sunset | 7:03 am / 5:40 pm | 7:20 am / 5:51 pm |
| Daylight | 10.6 h | 10.5 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 am56°Fdew point 51°F
- 9 am59°Fdew point 51°F
- Noon68°Fdew point 51°F
- 3 pm71°Fdew point 50°F
- 6 pm66°Fdew point 51°F
- 9 pm61°Fdew point 52°F
NOAA hourly normals (local standard time) from Mcallen Miller Intl Airport (2 mi away); average wind 9 mph; clear or few clouds in 56% of daytime hours, mostly cloudy or overcast in 40%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F12 of 31
- Hot dayshigh 90°F or more1 of 31
- Muggy daysdaily mean dew point 65°F or more4 of 31
- Wet daysat least 0.01 in of rain or melted snow6 of 31
- Notable rainat least 0.10 in3 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per December, counted from daily records for each year 1991-2020.
Rain and snow in December
Normal precipitation is 1.1 in; a dry December brings about 0.3 in and a wet one about 1.3 in (25th and 75th percentiles). About 1 day brings half an inch or more. Normal snowfall is 0.1 in.
How December varies from year to year
- Warmest December, 1991-20202007: average high 79°F
- Coolest December2000: average high 66°F
- Wettest December2009: 5.0 in
- Driest December2007: no measurable precipitation
- Highest reading93°F (December 14, 2019)
- Lowest reading25°F (December 25, 2004)
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 | 80°F | 74°F | 73°F |
| Normal low | 60°F | 54°F | 53°F |
| Wet days | 5 | 6 | 6 |
| Comfortable days | 9 | 12 | 14 |
| Daylight | 10.9 h | 10.5 h | 10.7 h |
Highs change by -6°F from November and -1°F into January.
Nearby alternatives in December
- Cooler: San Antonio, TX223 mi · high 65°F · 8 wet days
How McAllen ranks in December
- Normal high22nd warmest of 378 cities; 2nd of 38 in Texas
- Wet days87th driest of 378
- Comfortable days50th most of 340
Heating and cooling
December has 136 heating degree days and 104 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is McAllen in December?
The normal high is 74°F and the normal low is 54°F. From 1991 to 2020 the hottest December reading was 93°F (most recently on December 14, 2019).
Does it rain a lot in McAllen in December?
About 6 days in December have at least 0.01 in of precipitation, and the normal total is 1.1 in. The wettest December in 1991-2020 was in 2009 (5.0 in); the driest was in 2007, with no measurable precipitation.
Does it snow in McAllen in December?
Yes. Normal snowfall in December is 0.1 in.
Is December a good time to visit McAllen?
December ranks 2nd of 12 months on our comfort score for McAllen (62 out of 100). It has about 12 comfortable days and about 1 day at 90°F or hotter. The best months are January and December.
Where the numbers come from
- Temperature, rain, frost dates, humidity and wind by hour and cloud cover: Mcallen Miller Intl Airport (USW00012959), 2.0 mi SW of the city center, 100 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Mcallen (USC00415701), 1.5 mi WSW of the city center, 100 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Mc Allen Miller Intl Arpt (722506-12959), 1.9 mi SSW of the city center, 99 ft . Hourly observations, 1991-2020.