Johnson City (TX) Temperature by Month
Johnson City in Texas, United States of America sees significant seasonal temperature differences, with daytime highs between 17°C (63°F) in January and 36°C (97°F) in August, averaging 27°C (81°F) annually. Explore the full monthly breakdown below.
Johnson City Monthly Temperatures
Depending on the time of the year, temperatures range from very hot to mild in Johnson City. At night, minimum temperatures range from 22°C (72°F) in August to 2°C (36°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Johnson City by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. August, the city's warmest month, gets 298 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Johnson City 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.
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Johnson City vs World: Temperature Compared
Johnson City's average annual maximum temperature is 27°C (81°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.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in Johnson City?
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 Johnson City, January is the coolest month, with average highs of 17°C (63°F) and humidity around 67% — considered high. In August, the warmest month, temperatures average 36°C (97°F) with 64% 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 Johnson City this rarely lasts long on the ground.
For more on Johnson City's weather — including monthly rainfall, sunshine hours, and humidity — visit our Johnson City climate page.
