The highest day temperature in August 2025 was 109°F. The lowest night temperature was 70°F. The average values for day and night temperatures during August were 98.2°F и 82.3°F respectivly.

Most of the days in August are sunny but you can also expect cloudy and gloomy days.

Precipitation total in August for Plano is 0.6 in. It makes august the least rainy month of the year.

The average wind speed in August is 8.3 mph. It makes August one of the most windless months of the year for Plano.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Plano in August is 10.2 hours.