Mercedes (TX) Temperature by Month
The average annual maximum temperature in Mercedes, Texas, United States of America is 29°C (84°F), with daytime highs ranging from 21°C (70°F) in January to 36°C (97°F) in August. This page covers monthly averages, day-night differences, and how Mercedes compares to cities worldwide.
Mercedes Monthly Temperatures
In Mercedes, temperatures can shift dramatically between very hot in summer and pleasant in winter. Nights follow the same pattern, with lows ranging from 25°C (77°F) in August to 9°C (48°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Mercedes by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 307 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Mercedes 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
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Mercedes vs World: Temperature Compared
Mercedes's average annual maximum temperature is 29°C (84°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.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
What Does the Temperature Feel Like in Mercedes?
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 Mercedes, 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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Mercedes this rarely lasts long on the ground.
For more on Mercedes's weather — including monthly rainfall, sunshine hours, and humidity — visit our Mercedes climate page.
