McAllen weather in December: McAllen, Texas: normal highs, lows, rain and records for December
McAllen in December has a normal high of 74°F and a normal low of 54°F, a daily mean of 64°F, falling from 76°F on the 1st to 72°F by the 31st. Measurable precipitation falls on 6 days in a normal December, 1.06 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 12°C, 27 mm of precipitation in December.
- NOAA stationMcAllen Miller International Airport
- Station IDUSW00012959
- Location26.18°N 98.25°W
- Elevation100 ft (31 m)
- From the center3 miles
- Population148,782
- Jan 73° 53°
- Feb 77° 57°
- Mar 83° 63°
- Apr 88° 68°
- May 93° 74°
- Jun 97° 78°
- Jul 99° 79°
- Aug 100° 79°
- Sep 94° 76°
- Oct 89° 69°
- Nov 80° 60°
- Dec 74° 54°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is McAllen in December?
The normal high is 74°F and the normal low 54°F, for a daily mean of 64.0°F. December is 6.2°F cooler than November and 1.2°F warmer than January. December is the 11th warmest month of the year in McAllen and the 10th wettest. Across the month the normal high falls 4°F, from 76°F on December 1 to 72°F on December 31. From one year to the next December's mean temperature typically moves about 2.7°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 61°F and 67°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 21%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 76°F | 57°F | 18% | 7% |
| December 8 | 75°F | 55°F | 19% | 8% |
| December 15 | 74°F | 54°F | 19% | 8% |
| December 22 | 73°F | 53°F | 20% | 8% |
| December 31 | 72°F | 52°F | 21% | 8% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 76°F | 57°F | 18% | 7% | 10 h 40 min |
| December 2 | 76°F | 56°F | 18% | 7% | 10 h 40 min |
| December 3 | 76°F | 56°F | 18% | 8% | 10 h 40 min |
| December 4 | 76°F | 56°F | 18% | 8% | 10 h 40 min |
| December 5 | 75°F | 56°F | 18% | 8% | 10 h 40 min |
| December 6 | 75°F | 56°F | 18% | 8% | 10 h 30 min |
| December 7 | 75°F | 55°F | 18% | 8% | 10 h 30 min |
| December 8 | 75°F | 55°F | 19% | 8% | 10 h 30 min |
| December 9 | 75°F | 55°F | 19% | 8% | 10 h 30 min |
| December 10 | 75°F | 55°F | 19% | 8% | 10 h 30 min |
| December 11 | 74°F | 55°F | 19% | 8% | 10 h 30 min |
| December 12 | 74°F | 55°F | 19% | 8% | 10 h 30 min |
| December 13 | 74°F | 54°F | 19% | 8% | 10 h 30 min |
| December 14 | 74°F | 54°F | 19% | 8% | 10 h 30 min |
| December 15 | 74°F | 54°F | 19% | 8% | 10 h 30 min |
| December 16 | 74°F | 54°F | 19% | 8% | 10 h 30 min |
| December 17 | 74°F | 54°F | 19% | 8% | 10 h 30 min |
| December 18 | 73°F | 54°F | 20% | 8% | 10 h 30 min |
| December 19 | 73°F | 54°F | 20% | 8% | 10 h 30 min |
| December 20 | 73°F | 53°F | 20% | 8% | 10 h 30 min |
| December 21 | 73°F | 53°F | 20% | 8% | 10 h 30 min |
| December 22 | 73°F | 53°F | 20% | 8% | 10 h 30 min |
| December 23 | 73°F | 53°F | 20% | 8% | 10 h 30 min |
| December 24 | 73°F | 53°F | 20% | 8% | 10 h 30 min |
| December 25 | 73°F | 53°F | 20% | 8% | 10 h 30 min |
| December 26 | 72°F | 53°F | 20% | 8% | 10 h 30 min |
| December 27 | 72°F | 53°F | 20% | 8% | 10 h 30 min |
| December 28 | 72°F | 53°F | 20% | 8% | 10 h 30 min |
| December 29 | 72°F | 53°F | 21% | 8% | 10 h 30 min |
| December 30 | 72°F | 52°F | 21% | 8% | 10 h 30 min |
| December 31 | 72°F | 52°F | 21% | 8% | 10 h 30 min |
- Normal high
- 74°FDecember average
- Normal low
- 54°FDecember average
- Precipitation
- 1.06 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 10 h 40 min to 10 h 30 minDecember 1 to December 31
- Days at 70°F or more
- 20
- Days at 80°F or more
- 11
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00012959; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in McAllen in December?
On a given December day the chance of 0.01 inch or more is 19% on average, highest around December 31 (21%). In all, 1.06 in falls on 6 days of a normal December.
In a normal December in McAllen, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012959.
How humid and windy is McAllen in December?
At 3 p.m. the normal temperature is 68°F with 48% relative humidity and a dew point of 48°F; at 6 a.m. it is 54°F with 81% humidity. The wind averages 9.3 mph, most often from the east-northeast in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 54°F | 48°F | 81% | 7.9 mph | – |
| 9 a.m. | 56°F | 49°F | 76% | 8.9 mph | – |
| noon | 65°F | 49°F | 57% | 11.5 mph | 54% |
| 3 p.m. | 68°F | 48°F | 48% | 11.7 mph | 56% |
| 6 p.m. | 64°F | 48°F | 56% | 10.0 mph | 66% |
| 9 p.m. | 59°F | 50°F | 72% | 8.3 mph | 64% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00012959. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for December in McAllen?
The warmest December temperature on McAllen's official record (since 1941) is 96°F, on December 5, 1977; the coldest is 18°F, on December 23, 1989. The wettest December brought 4.99 in (2009).
The December mean against the 1991-2020 normal of 64.0°F: 2021 71.5°F (+7.5), 2022 64.3°F (+0.3), 2023 65.2°F (+1.2), 2024 69.4°F (+5.4), 2025 68.8°F (+4.8). 5 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.5°F | +7.5°F | 0.97 in |
| 2022 | 64.3°F | +0.3°F | 0.77 in |
| 2023 | 65.2°F | +1.2°F | 0.56 in |
| 2024 | 69.4°F | +5.4°F | 0.61 in |
| 2025 | 68.8°F | +4.8°F | 0.79 in |
Source: records: ACIS, NWS threaded record MFEthr; recent months: ACIS, station USW00012959. Records and recent months use complete months only.
How does December in McAllen 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; McAllen's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.