Alvin weather in September: Alvin, Texas: normal highs, lows, rain and records for September
Alvin in September has a normal high of 89°F and a normal low of 70°F, a daily mean of 80°F, falling from 91°F on the 1st to 85°F by the 30th. Measurable precipitation falls on 11 days in a normal September, 5.37 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 21°C, 136 mm of precipitation in September.
- NOAA stationAlvin
- Station IDUSC00410204
- Location29.37°N 95.23°W
- Elevation28 ft (9 m)
- Population29,869
- Jan 63° 44°
- Feb 67° 48°
- Mar 73° 54°
- Apr 78° 60°
- May 85° 68°
- Jun 89° 72°
- Jul 91° 74°
- Aug 91° 74°
- Sep 89° 70°
- Oct 81° 61°
- Nov 73° 52°
- Dec 65° 45°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Alvin in September?
The normal high is 89°F and the normal low 70°F, for a daily mean of 79.5°F. September is 3.0°F cooler than August and 8.5°F warmer than October. September is the 4th warmest month of the year in Alvin and the 3rd wettest. Across the month the normal high falls 6°F, from 91°F on September 1 to 85°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 78°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 39%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 91°F | 74°F | 38% | 26% |
| September 8 | 90°F | 73°F | 38% | 26% |
| September 15 | 89°F | 71°F | 37% | 25% |
| September 22 | 87°F | 69°F | 33% | 23% |
| September 30 | 85°F | 66°F | 29% | 20% |
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 | 74°F | 38% | 26% | 12 h 50 min |
| September 2 | 91°F | 73°F | 39% | 26% | 12 h 50 min |
| September 3 | 91°F | 73°F | 39% | 26% | 12 h 40 min |
| September 4 | 91°F | 73°F | 39% | 26% | 12 h 40 min |
| September 5 | 90°F | 73°F | 39% | 26% | 12 h 40 min |
| September 6 | 90°F | 73°F | 39% | 26% | 12 h 40 min |
| September 7 | 90°F | 73°F | 39% | 26% | 12 h 40 min |
| September 8 | 90°F | 73°F | 38% | 26% | 12 h 30 min |
| September 9 | 90°F | 72°F | 38% | 26% | 12 h 30 min |
| September 10 | 90°F | 72°F | 38% | 26% | 12 h 30 min |
| September 11 | 90°F | 72°F | 38% | 26% | 12 h 30 min |
| September 12 | 89°F | 72°F | 38% | 26% | 12 h 30 min |
| September 13 | 89°F | 71°F | 37% | 26% | 12 h 30 min |
| September 14 | 89°F | 71°F | 37% | 25% | 12 h 20 min |
| September 15 | 89°F | 71°F | 37% | 25% | 12 h 20 min |
| September 16 | 89°F | 71°F | 36% | 25% | 12 h 20 min |
| September 17 | 88°F | 70°F | 36% | 25% | 12 h 20 min |
| September 18 | 88°F | 70°F | 36% | 24% | 12 h 20 min |
| September 19 | 88°F | 70°F | 35% | 24% | 12 h 20 min |
| September 20 | 88°F | 69°F | 35% | 24% | 12 h 10 min |
| September 21 | 88°F | 69°F | 34% | 23% | 12 h 10 min |
| September 22 | 87°F | 69°F | 33% | 23% | 12 h 10 min |
| September 23 | 87°F | 69°F | 33% | 23% | 12 h 10 min |
| September 24 | 87°F | 68°F | 32% | 22% | 12 h 10 min |
| September 25 | 87°F | 68°F | 32% | 22% | 12 h 10 min |
| September 26 | 86°F | 68°F | 31% | 22% | 12 h |
| September 27 | 86°F | 67°F | 30% | 21% | 12 h |
| September 28 | 86°F | 67°F | 30% | 21% | 12 h |
| September 29 | 86°F | 66°F | 29% | 21% | 12 h |
| September 30 | 85°F | 66°F | 29% | 20% | 12 h |
- Normal high
- 89°FSeptember average
- Normal low
- 70°FSeptember average
- Precipitation
- 5.37 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 13
- 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 USC00410204; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Alvin in September?
On a given September day the chance of 0.01 inch or more is 35% on average, highest around September 3 (39%). In all, 5.37 in falls on 11 days of a normal September, 2 of them with an inch or more.
In a normal September in Alvin, 13 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00410204.
What are the records for September in Alvin?
The warmest September temperature on this station's record (since 1903) is 99°F, on September 30, 1972; the coldest is 41°F, on September 30, 1967. The wettest September brought 18.94 in (1979).
Source: records: ACIS, station USC00410204. Records and recent months use complete months only.
How does September in Alvin 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; Alvin's is 89°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.