Rockport weather in September: Rockport, Texas: normal highs, lows, rain and records for September
Rockport in September has a normal high of 89°F and a normal low of 75°F, a daily mean of 82°F, falling from 91°F on the 1st to 87°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 4.18 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 32°C and low of 24°C, 106 mm of precipitation in September.
- NOAA stationRockport Aransas County Airport
- Station IDUSW00012972
- Location28.08°N 97.05°W
- Elevation22 ft (7 m)
- From the center2 miles
- Population11,069
- Jan 65° 49°
- Feb 69° 54°
- Mar 74° 60°
- Apr 80° 66°
- May 85° 73°
- Jun 90° 78°
- Jul 91° 79°
- Aug 92° 79°
- Sep 89° 75°
- Oct 84° 68°
- Nov 75° 58°
- Dec 68° 51°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rockport in September?
The normal high is 89°F and the normal low 75°F, for a daily mean of 82.3°F. September is 3.5°F cooler than August and 6.5°F warmer than October. September is the 4th warmest month of the year in Rockport and the wettest. Across the month the normal high falls 4°F, from 91°F on September 1 to 87°F on September 30. From one year to the next September's mean temperature typically moves about 1.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 81°F and 84°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 28%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 91°F | 78°F | 25% | 16% |
| September 8 | 90°F | 77°F | 28% | 17% |
| September 15 | 89°F | 75°F | 28% | 18% |
| September 22 | 88°F | 74°F | 28% | 17% |
| September 30 | 87°F | 72°F | 26% | 16% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 91°F | 78°F | 25% | 16% | 12 h 40 min |
| September 2 | 91°F | 78°F | 26% | 16% | 12 h 40 min |
| September 3 | 91°F | 77°F | 26% | 16% | 12 h 40 min |
| September 4 | 91°F | 77°F | 27% | 16% | 12 h 40 min |
| September 5 | 91°F | 77°F | 27% | 17% | 12 h 40 min |
| September 6 | 91°F | 77°F | 27% | 17% | 12 h 40 min |
| September 7 | 91°F | 77°F | 28% | 17% | 12 h 30 min |
| September 8 | 90°F | 77°F | 28% | 17% | 12 h 30 min |
| September 9 | 90°F | 76°F | 28% | 18% | 12 h 30 min |
| September 10 | 90°F | 76°F | 28% | 18% | 12 h 30 min |
| September 11 | 90°F | 76°F | 28% | 18% | 12 h 30 min |
| September 12 | 90°F | 76°F | 28% | 18% | 12 h 30 min |
| September 13 | 90°F | 76°F | 28% | 18% | 12 h 30 min |
| September 14 | 90°F | 76°F | 28% | 18% | 12 h 20 min |
| September 15 | 89°F | 75°F | 28% | 18% | 12 h 20 min |
| September 16 | 89°F | 75°F | 28% | 18% | 12 h 20 min |
| September 17 | 89°F | 75°F | 28% | 18% | 12 h 20 min |
| September 18 | 89°F | 75°F | 28% | 18% | 12 h 20 min |
| September 19 | 89°F | 75°F | 28% | 18% | 12 h 20 min |
| September 20 | 89°F | 75°F | 28% | 18% | 12 h 10 min |
| September 21 | 89°F | 74°F | 28% | 18% | 12 h 10 min |
| September 22 | 88°F | 74°F | 28% | 17% | 12 h 10 min |
| September 23 | 88°F | 74°F | 27% | 17% | 12 h 10 min |
| September 24 | 88°F | 74°F | 27% | 17% | 12 h 10 min |
| September 25 | 88°F | 74°F | 27% | 17% | 12 h 10 min |
| September 26 | 88°F | 73°F | 27% | 17% | 12 h |
| September 27 | 88°F | 73°F | 27% | 17% | 12 h |
| September 28 | 87°F | 73°F | 26% | 17% | 12 h |
| September 29 | 87°F | 73°F | 26% | 16% | 12 h |
| September 30 | 87°F | 72°F | 26% | 16% | 12 h |
- Normal high
- 89°FSeptember average
- Normal low
- 75°FSeptember average
- Precipitation
- 4.18 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 19
- Daylight
- 12 h 40 min to 12 hSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 30
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00012972; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rockport in September?
On a given September day the chance of 0.01 inch or more is 27% on average, highest around September 12 (28%). In all, 4.18 in falls on 9 days of a normal September, 2 of them with an inch or more.
In a normal September in Rockport, 19 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012972.
What are the records for September in Rockport?
The September mean against the 1991-2020 normal of 82.3°F: 2021 82.3°F (at normal), 2022 83.2°F (+0.9), 2023 86.2°F (+3.9), 2024 83.8°F (+1.5), 2025 83.5°F (+1.3), 2026 86.6°F (+4.3). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 82.3°F | at normal | 3.76 in |
| 2022 | 83.2°F | +0.9°F | 5.77 in |
| 2023 | 86.2°F | +3.9°F | 0.54 in |
| 2024 | 83.8°F | +1.5°F | 2.44 in |
| 2025 | 83.5°F | +1.3°F | 2.23 in |
| 2026 | 86.6°F | +4.3°F | 2.22 in |
Source: recent months: ACIS, station USW00012972. Records and recent months use complete months only.
How does September in Rockport compare across Texas?
Across the 321 places PlainClimate covers in Texas, September normal highs run from 81°F in Hart to 95°F in Presidio; Rockport's is 89°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.