Harlingen weather in December: Harlingen, Texas: normal highs, lows, rain and records for December
Harlingen in December has a normal high of 73°F and a normal low of 52°F, a daily mean of 62°F, falling from 76°F on the 1st to 71°F by the 31st. Measurable precipitation falls on 8 days in a normal December, 1.22 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 31 mm of precipitation in December.
- NOAA stationHarlingen Rio Grande Airport
- Station IDUSW00012904
- Location26.23°N 97.65°W
- Elevation34 ft (10 m)
- Population72,234
- Jan 72° 50°
- Feb 76° 54°
- Mar 81° 59°
- Apr 87° 65°
- May 91° 71°
- Jun 95° 75°
- Jul 96° 75°
- Aug 97° 75°
- Sep 92° 73°
- Oct 88° 66°
- Nov 79° 57°
- Dec 73° 52°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Harlingen in December?
The normal high is 73°F and the normal low 52°F, for a daily mean of 62.4°F. December is 6.0°F cooler than November and 1.6°F warmer than January. December is the 11th warmest month of the year in Harlingen and the 10th wettest. Across the month the normal high falls 5°F, from 76°F on December 1 to 71°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 60°F and 65°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 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 76°F | 54°F | 27% | 8% |
| December 8 | 74°F | 53°F | 26% | 8% |
| December 15 | 73°F | 52°F | 25% | 8% |
| December 22 | 72°F | 51°F | 25% | 7% |
| December 31 | 71°F | 50°F | 26% | 7% |
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 | 54°F | 27% | 8% | 10 h 40 min |
| December 2 | 75°F | 54°F | 26% | 8% | 10 h 40 min |
| December 3 | 75°F | 54°F | 26% | 8% | 10 h 40 min |
| December 4 | 75°F | 54°F | 26% | 8% | 10 h 40 min |
| December 5 | 75°F | 53°F | 26% | 8% | 10 h 40 min |
| December 6 | 75°F | 53°F | 26% | 8% | 10 h 30 min |
| December 7 | 75°F | 53°F | 26% | 8% | 10 h 30 min |
| December 8 | 74°F | 53°F | 26% | 8% | 10 h 30 min |
| December 9 | 74°F | 53°F | 26% | 8% | 10 h 30 min |
| December 10 | 74°F | 53°F | 26% | 8% | 10 h 30 min |
| December 11 | 74°F | 52°F | 25% | 8% | 10 h 30 min |
| December 12 | 74°F | 52°F | 25% | 8% | 10 h 30 min |
| December 13 | 74°F | 52°F | 25% | 8% | 10 h 30 min |
| December 14 | 73°F | 52°F | 25% | 8% | 10 h 30 min |
| December 15 | 73°F | 52°F | 25% | 8% | 10 h 30 min |
| December 16 | 73°F | 52°F | 25% | 8% | 10 h 30 min |
| December 17 | 73°F | 51°F | 25% | 8% | 10 h 30 min |
| December 18 | 73°F | 51°F | 25% | 8% | 10 h 30 min |
| December 19 | 73°F | 51°F | 25% | 7% | 10 h 30 min |
| December 20 | 73°F | 51°F | 25% | 7% | 10 h 30 min |
| December 21 | 72°F | 51°F | 25% | 7% | 10 h 30 min |
| December 22 | 72°F | 51°F | 25% | 7% | 10 h 30 min |
| December 23 | 72°F | 50°F | 26% | 7% | 10 h 30 min |
| December 24 | 72°F | 50°F | 26% | 7% | 10 h 30 min |
| December 25 | 72°F | 50°F | 26% | 7% | 10 h 30 min |
| December 26 | 72°F | 50°F | 26% | 7% | 10 h 30 min |
| December 27 | 72°F | 50°F | 26% | 7% | 10 h 30 min |
| December 28 | 72°F | 50°F | 26% | 7% | 10 h 30 min |
| December 29 | 72°F | 50°F | 26% | 7% | 10 h 30 min |
| December 30 | 71°F | 50°F | 26% | 7% | 10 h 30 min |
| December 31 | 71°F | 50°F | 26% | 7% | 10 h 30 min |
- Normal high
- 73°FDecember average
- Normal low
- 52°FDecember average
- Precipitation
- 1.22 inmonth total
- Days with precipitation
- 80.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 10 h 40 min to 10 h 30 minDecember 1 to December 31
- Days at 70°F or more
- 21
- Days at 80°F or more
- 10
- Sunshine
- 68%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00012904; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Harlingen in December?
On a given December day the chance of 0.01 inch or more is 26% on average, highest around December 1 (27%). In all, 1.22 in falls on 8 days of a normal December.
In a normal December in Harlingen, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012904.
What are the records for December in Harlingen?
The warmest December temperature on this station's record (since 1952) is 90°F, on December 14, 2019; the coldest is 27°F, on December 23, 2022. The wettest December brought 5.04 in (2024).
The December mean against the 1991-2020 normal of 62.4°F: 2021 71.1°F (+8.7), 2022 63.8°F (+1.4), 2023 64.1°F (+1.7), 2024 67.6°F (+5.2), 2025 66.1°F (+3.7). 5 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.1°F | +8.7°F | 1.86 in |
| 2022 | 63.8°F | +1.4°F | 0.35 in |
| 2023 | 64.1°F | +1.7°F | 0.54 in |
| 2024 | 67.6°F | +5.2°F | 5.04 in |
| 2025 | 66.1°F | +3.7°F | 1.59 in |
Source: records: ACIS, station USW00012904; recent months: ACIS, station USW00012904. Records and recent months use complete months only.
How does December in Harlingen 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; Harlingen's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.