The highest day temperature in August 2025 was 68°F. The lowest night temperature was 46°F. The average values for day and night temperatures during August were 60.3°F и 54.5°F respectivly.

The average sea surface temperature in August 2025 for Rio Grande was 58.4°F. The maximum and minimum values were 55.0°F and 64.0°F respectively.

You can expect various weather conditions during August. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in August for Rio Grande is 1.6 in. It makes august one of the most rainy months of the year.

The average wind speed in August is 11.0 mph. This value is relatively stable throughout the year.

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 Rio Grande in August is 6.3 hours.