Harlingen in Winter
In winter (December, January and February), Harlingen sees average daytime highs around 73°F and overnight lows near 55°F, with 3.5 in of rain over about 16 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 73°F. The sky is clear or mostly clear about 34% of the time across winter, and the air most often feels dry.
Winter is Harlingen's best season of the year to visit on our travel score. For the whole year in context, see Harlingen's year-round climate.
- Avg daytime high
- 73°F
- coldest season of the year
- Avg overnight low
- 55°F
- Rainfall
- 3.5 in
- 16 wet days
- Avg wind
- 10 mph
- Travel score
- 7.4
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Harlingen in Winter
Across winter, daytime highs hold fairly steady around 73°F.
A typical winter day in Harlingen reaches about 73°F and drops to 55°F overnight. The warmest of the three months is February, the coolest January.
How winter really feels in Harlingen
Once humidity and wind are folded in, winter brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Harlingen weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 71° / 53° | 1.2 | 5.1 | 10.5 | 7.3 |
| Feb | 75° / 57° | 1.0 | 4.9 | 11.1 | 7.6 |
| Mar | 80° / 62° | 1.6 | 5.5 | 11.8 | 7.2 |
| Apr | 85° / 68° | 1.7 | 5.5 | 12.6 | 5.7 |
| May | 90° / 73° | 1.9 | 6.5 | 13.3 | 4.3 |
| Jun | 94° / 77° | 2.3 | 8.9 | 13.6 | 3.1 |
| Jul | 95° / 78° | 2.4 | 8.5 | 13.5 | 2.6 |
| Aug | 95° / 78° | 2.1 | 9.4 | 12.9 | 2.5 |
| Sep | 91° / 75° | 4.1 | 14.4 | 12.2 | 3.4 |
| Oct | 86° / 68° | 2.7 | 7.9 | 11.4 | 5.5 |
| Nov | 78° / 61° | 1.5 | 6.5 | 10.7 | 7.4 |
| Dec | 73° / 55° | 1.3 | 5.5 | 10.4 | 7.4 |
Cloud cover in Winter
The sky is clear or mostly clear about 34% of the time across winter.
Chance of precipitation in Winter
Harlingen gets around 3.5 in of rain over 16 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 mph across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 30 min in early December to 11 h 24 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 3.3 kWh/m².
Hazard calendar for Harlingen
None of Harlingen's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Harlingen sits in the Atlantic hurricane belt; the season peaks August–October.
Is winter a good time to visit Harlingen?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit Harlingen for general sightseeing.
What to pack for Harlingen in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Harlingen sees daytime highs around 73°F and nights near 55°F. Worth packing: light clothes. About 16 days see rain.
Sea temperature near Harlingen in Winter
The nearest coast averages about 67°F across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 35 mi away) is warmest in September at about 84°F and coldest in February near 65°F.
It's comfortable for a long swim from Mar 22 to Dec 29 — about 9.3 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 66 | 65 | 67 | 72 | 77 | 82 | 82 | 83 | 84 | 81 | 75 | 70 |
| Comfort | Cool | Cool | Cool | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Warm | Refreshing | Refreshing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 66 | Cool |
| Feb | 65 | Cool |
| Mar | 67 | Cool |
| Apr | 72 | Refreshing |
| May | 77 | Warm |
| Jun | 82 | Warm |
| Jul | 82 | Tropical |
| Aug | 83 | Tropical |
| Sep | 84 | Tropical |
| Oct | 81 | Warm |
| Nov | 75 | Refreshing |
| Dec | 70 | Refreshing |
UV index in Harlingen in Winter
Clear-sky midday UV across winter averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Harlingen peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 7 | 8 | 11 | 9 | 12 | 11 | 11 | 10 | 8 | 6 | 5 |
| Level | Moderate | High | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 7 | High |
| Mar | 8 | Very high |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 5 | Moderate |
Air quality in Harlingen in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Harlingen is worst in July — around 25 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (October, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 9 | 11 | 13 | 19 | 20 | 25 | 18 | 13 | 7 | 7 | 9 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 11 | Good |
| Apr | 13 | Moderate |
| May | 19 | Moderate |
| Jun | 20 | Moderate |
| Jul | 25 | Moderate |
| Aug | 18 | Moderate |
| Sep | 13 | Moderate |
| Oct | 7 | Good |
| Nov | 7 | Good |
| Dec | 9 | Good |
Where is Harlingen?
Harlingen sits at 26.2°N, 97.7°W, 39 ft above sea level, in United States. The nearest listed city is San Benito, 5.6 mi away.
Topography around Harlingen
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Harlingen.
Within 2 miles, the terrain around Harlingen has only modest variations in elevation — a maximum elevation change of 66 ft around an average of 43 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 82 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 446 ft.
The land around Harlingen is covered by artificial surfaces (56%) and trees (25%) within 2 miles, cropland (52%) and grassland (22%) within 10 miles, and cropland (34%), grassland (22%) and water (20%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Harlingen (26.1906°, -97.6961°, elevation 39 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.