The highest day temperature in September 2024 was 75°F. The lowest night temperature was 48°F. The average values for day and night temperatures during September were 64.8°F и 59.3°F respectivly.

The average sea surface temperature in September 2024 for Rio Grande was 62.4°F. The maximum and minimum values were 56.4°F and 71.2°F respectively.

Most of the days in September are gloomy but you can also expect sunny days.

Precipitation total in September for Rio Grande is 2.1 in. It makes september the most rainy month of the year.

The average wind speed in September is 11.7 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 September is 5.4 hours.