Click on a day for an hourly weather forecast
The temperatures in Port Aransas during September are extremely high, between 27°C and hot as 29°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Port Aransas. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Port Aransas in September 2025.
If you’re planning to visit Port Aransas in the near future, we highly recommend that you review the 14 day weather forecast for Port Aransas before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 17° / 13° | 3 | 28 | 0 | 58 mm | Good | Port Aransas in January |
| February | 18° / 14° | 3 | 25 | 0 | 38 mm | Good | Port Aransas in February |
| March | 20° / 17° | 2 | 29 | 0 | 36 mm | Good | Port Aransas in March |
| April | 23° / 21° | 3 | 27 | 0 | 42 mm | Perfect | Port Aransas in April |
| May | 27° / 24° | 4 | 27 | 0 | 60 mm | Perfect | Port Aransas in May |
| June | 29° / 27° | 6 | 24 | 0 | 119 mm | Good | Port Aransas in June |
| July | 30° / 27° | 5 | 26 | 0 | 89 mm | Good | Port Aransas in July |
| August | 31° / 28° | 5 | 26 | 0 | 85 mm | Good | Port Aransas in August |
| September | 29° / 27° | 11 | 19 | 0 | 218 mm | Ok | Port Aransas in September |
| October | 27° / 24° | 4 | 27 | 0 | 82 mm | Perfect | Port Aransas in October |
| November | 22° / 19° | 3 | 27 | 0 | 54 mm | Good | Port Aransas in November |
| December | 19° / 15° | 4 | 27 | 0 | 59 mm | Good | Port Aransas in December |