The highest day temperature in September 2026 was 107°F. The lowest night temperature was 82°F. The average values for day and night temperatures during September were 100.7°F и 85.0°F respectivly.

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

Precipitation total in September for Matamoros is 0.8 in.

The average wind speed in September is 10.1 mph. It makes September the most windless month of the year for Matamoros.

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 Matamoros in September is 7.5 hours.