Weslaco (TX) Temperature by Month
Weslaco in Texas, United States of America sees significant seasonal temperature differences, with daytime highs between 21°C (70°F) in January and 36°C (97°F) in August, averaging 30°C (86°F) annually. Explore the full monthly breakdown below.
Weslaco Monthly Temperatures
The climate in Weslaco is dynamic, ranging widely from pleasant in winter to very hot in summer. Nights are significantly colder, with lows dropping from 25°C (77°F) in August to 10°C (50°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Weslaco by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 307 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Weslaco vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
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pleasant
moderate
cold
very cold
Weslaco vs World: Temperature Compared
Weslaco's average annual maximum temperature is 30°C (86°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Weslaco?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Weslaco, January is the coolest month, with average highs of 21°C (70°F) and humidity around 78% — considered high. In August, the warmest month, temperatures average 36°C (97°F) with 73% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Weslaco's weather — including monthly rainfall, sunshine hours, and humidity — visit our Weslaco climate page.
