Donna (TX) Temperature by Month

Donna, Texas, United States of America has an average annual maximum temperature of 30°C (86°F), ranging from 21°C (70°F) in January to 37°C (99°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

In Donna, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping 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 Donna 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:

Donna'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:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

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 Donna, 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 37°C (99°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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Donna's weather, including monthly rainfall, sunshine hours, and humidity, visit our Donna climate page.