Baytown weather in September: Baytown, Texas: normal highs, lows, rain and records for September
Baytown in September has a normal high of 89°F and a normal low of 69°F, a daily mean of 79°F, falling from 91°F on the 1st to 86°F by the 30th. Measurable precipitation falls on 10 days in a normal September, 6.41 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 21°C, 163 mm of precipitation in September.
- NOAA stationBaytown
- Station IDUSC00410586
- Location29.91°N 94.99°W
- Elevation26 ft (8 m)
- Population86,004
- Jan 63° 41°
- Feb 66° 45°
- Mar 72° 52°
- Apr 78° 59°
- May 84° 67°
- Jun 89° 73°
- Jul 92° 75°
- Aug 92° 74°
- Sep 89° 69°
- Oct 82° 60°
- Nov 71° 50°
- Dec 65° 44°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Baytown in September?
The normal high is 89°F and the normal low 69°F, for a daily mean of 78.8°F. September is 4.5°F cooler than August and 8.2°F warmer than October. September is the 4th warmest month of the year in Baytown and the 3rd wettest. Across the month the normal high falls 5°F, from 91°F on September 1 to 86°F on September 30. From one year to the next September's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 77°F and 81°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 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 91°F | 73°F | 37% | 26% |
| September 8 | 90°F | 71°F | 35% | 25% |
| September 15 | 89°F | 69°F | 33% | 23% |
| September 22 | 88°F | 67°F | 29% | 21% |
| September 30 | 86°F | 65°F | 26% | 18% |
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 | 73°F | 37% | 26% | 12 h 50 min |
| September 2 | 91°F | 72°F | 37% | 26% | 12 h 50 min |
| September 3 | 91°F | 72°F | 37% | 26% | 12 h 40 min |
| September 4 | 90°F | 72°F | 37% | 26% | 12 h 40 min |
| September 5 | 90°F | 72°F | 37% | 25% | 12 h 40 min |
| September 6 | 90°F | 72°F | 36% | 25% | 12 h 40 min |
| September 7 | 90°F | 71°F | 36% | 25% | 12 h 40 min |
| September 8 | 90°F | 71°F | 35% | 25% | 12 h 40 min |
| September 9 | 90°F | 71°F | 35% | 25% | 12 h 30 min |
| September 10 | 90°F | 71°F | 35% | 25% | 12 h 30 min |
| September 11 | 89°F | 70°F | 34% | 24% | 12 h 30 min |
| September 12 | 89°F | 70°F | 34% | 24% | 12 h 30 min |
| September 13 | 89°F | 70°F | 34% | 24% | 12 h 30 min |
| September 14 | 89°F | 70°F | 33% | 23% | 12 h 20 min |
| September 15 | 89°F | 69°F | 33% | 23% | 12 h 20 min |
| September 16 | 89°F | 69°F | 32% | 23% | 12 h 20 min |
| September 17 | 88°F | 69°F | 32% | 23% | 12 h 20 min |
| September 18 | 88°F | 69°F | 31% | 22% | 12 h 20 min |
| September 19 | 88°F | 68°F | 31% | 22% | 12 h 20 min |
| September 20 | 88°F | 68°F | 30% | 22% | 12 h 10 min |
| September 21 | 88°F | 68°F | 30% | 21% | 12 h 10 min |
| September 22 | 88°F | 67°F | 29% | 21% | 12 h 10 min |
| September 23 | 87°F | 67°F | 29% | 21% | 12 h 10 min |
| September 24 | 87°F | 67°F | 28% | 20% | 12 h 10 min |
| September 25 | 87°F | 67°F | 28% | 20% | 12 h 10 min |
| September 26 | 87°F | 66°F | 28% | 20% | 12 h |
| September 27 | 87°F | 66°F | 27% | 19% | 12 h |
| September 28 | 86°F | 66°F | 27% | 19% | 12 h |
| September 29 | 86°F | 65°F | 26% | 19% | 12 h |
| September 30 | 86°F | 65°F | 26% | 18% | 12 h |
- Normal high
- 89°FSeptember average
- Normal low
- 69°FSeptember average
- Precipitation
- 6.41 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 14
- Daylight
- 12 h 50 min to 12 hSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 28
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00410586; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Baytown in September?
On a given September day the chance of 0.01 inch or more is 32% on average, highest around September 1 (37%). In all, 6.41 in falls on 10 days of a normal September, 2 of them with an inch or more.
In a normal September in Baytown, 14 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00410586.
What are the records for September in Baytown?
The warmest September temperature on this station's record (since 1983) is 109°F, on September 5, 2000; the coldest is 48°F, on September 22, 1983. The wettest September brought 15.80 in (2018).
The September mean against the 1991-2020 normal of 78.8°F: 2022 78.2°F (−0.6), 2023 82.9°F (+4.1), 2024 80.5°F (+1.7), 2025 80.6°F (+1.8), 2026 83.7°F (+4.9). 4 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 78.2°F | −0.6°F | 1.77 in |
| 2023 | 82.9°F | +4.1°F | 5.24 in |
| 2024 | 80.5°F | +1.7°F | 2.29 in |
| 2025 | 80.6°F | +1.8°F | 1.72 in |
| 2026 | 83.7°F | +4.9°F | 2.71 in |
Source: records: ACIS, station USC00410586; recent months: ACIS, station USC00410586. Records and recent months use complete months only.
How does September in Baytown 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; Baytown's is 89°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.