Del Rio weather in September: Del Rio, Texas: normal highs, lows, rain and records for September
Del Rio in September has a normal high of 94°F and a normal low of 73°F, a daily mean of 84°F, falling from 98°F on the 1st to 90°F by the 30th. Measurable precipitation falls on 6 days in a normal September, 2.63 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 34°C and low of 23°C, 67 mm of precipitation in September.
- NOAA stationDel Rio International Airport
- Station IDUSW00022010
- Location29.38°N 100.93°W
- Elevation999 ft (305 m)
- Population34,678
- Jan 68° 44°
- Feb 73° 48°
- Mar 80° 56°
- Apr 87° 63°
- May 93° 71°
- Jun 98° 77°
- Jul 100° 79°
- Aug 101° 79°
- Sep 94° 73°
- Oct 86° 64°
- Nov 75° 53°
- Dec 68° 44°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Del Rio in September?
The normal high is 94°F and the normal low 73°F, for a daily mean of 83.5°F. September is 6.4°F cooler than August and 8.7°F warmer than October. September is the 4th warmest month of the year in Del Rio and the 3rd wettest. Across the month the normal high falls 8°F, from 98°F on September 1 to 90°F on September 30. From one year to the next September's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 81°F and 86°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 20%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 98°F | 77°F | 19% | 11% |
| September 8 | 96°F | 75°F | 20% | 12% |
| September 15 | 94°F | 74°F | 20% | 12% |
| September 22 | 92°F | 72°F | 19% | 11% |
| September 30 | 90°F | 69°F | 18% | 10% |
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 | 98°F | 77°F | 19% | 11% | 12 h 50 min |
| September 2 | 98°F | 77°F | 19% | 11% | 12 h 50 min |
| September 3 | 97°F | 76°F | 19% | 11% | 12 h 40 min |
| September 4 | 97°F | 76°F | 19% | 12% | 12 h 40 min |
| September 5 | 97°F | 76°F | 19% | 12% | 12 h 40 min |
| September 6 | 96°F | 76°F | 19% | 12% | 12 h 40 min |
| September 7 | 96°F | 76°F | 19% | 12% | 12 h 40 min |
| September 8 | 96°F | 75°F | 20% | 12% | 12 h 30 min |
| September 9 | 96°F | 75°F | 20% | 12% | 12 h 30 min |
| September 10 | 95°F | 75°F | 20% | 12% | 12 h 30 min |
| September 11 | 95°F | 75°F | 20% | 12% | 12 h 30 min |
| September 12 | 95°F | 74°F | 20% | 12% | 12 h 30 min |
| September 13 | 94°F | 74°F | 20% | 12% | 12 h 30 min |
| September 14 | 94°F | 74°F | 20% | 12% | 12 h 20 min |
| September 15 | 94°F | 74°F | 20% | 12% | 12 h 20 min |
| September 16 | 94°F | 73°F | 20% | 12% | 12 h 20 min |
| September 17 | 93°F | 73°F | 20% | 12% | 12 h 20 min |
| September 18 | 93°F | 73°F | 20% | 11% | 12 h 20 min |
| September 19 | 93°F | 73°F | 20% | 11% | 12 h 20 min |
| September 20 | 93°F | 72°F | 19% | 11% | 12 h 10 min |
| September 21 | 92°F | 72°F | 19% | 11% | 12 h 10 min |
| September 22 | 92°F | 72°F | 19% | 11% | 12 h 10 min |
| September 23 | 92°F | 71°F | 19% | 11% | 12 h 10 min |
| September 24 | 92°F | 71°F | 19% | 11% | 12 h 10 min |
| September 25 | 91°F | 71°F | 19% | 11% | 12 h 10 min |
| September 26 | 91°F | 71°F | 19% | 10% | 12 h |
| September 27 | 91°F | 70°F | 18% | 10% | 12 h |
| September 28 | 91°F | 70°F | 18% | 10% | 12 h |
| September 29 | 90°F | 70°F | 18% | 10% | 12 h |
| September 30 | 90°F | 69°F | 18% | 10% | 12 h |
- Normal high
- 94°FSeptember average
- Normal low
- 73°FSeptember average
- Precipitation
- 2.63 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 21
- 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
- 29
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00022010; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Del Rio in September?
On a given September day the chance of 0.01 inch or more is 19% on average, highest around September 13 (20%). In all, 2.63 in falls on 6 days of a normal September, 1 of them with an inch or more.
In a normal September in Del Rio, 21 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00022010.
How humid and windy is Del Rio in September?
At 3 p.m. the normal temperature is 87°F with 40% relative humidity and a dew point of 60°F; at 6 a.m. it is 68°F with 79% humidity. The wind averages 7.8 mph, most often from the southeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 68°F | 62°F | 79% | 6.7 mph | 60% |
| 9 a.m. | 74°F | 63°F | 69% | 8.0 mph | – |
| noon | 82°F | 62°F | 51% | 9.9 mph | 64% |
| 3 p.m. | 87°F | 60°F | 40% | 10.0 mph | 84% |
| 6 p.m. | 85°F | 59°F | 42% | 8.4 mph | 87% |
| 9 p.m. | 77°F | 60°F | 54% | 6.6 mph | 87% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00022010. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Del Rio?
The warmest September temperature on Del Rio's official record (since 1905) is 110°F, on September 6, 2000; the coldest is 43°F, on September 29, 1908. The wettest September brought 15.74 in (1964).
The September mean against the 1991-2020 normal of 83.5°F: 2021 86.5°F (+3.0), 2022 80.7°F (−2.8), 2023 89.2°F (+5.7), 2024 83.2°F (−0.3), 2025 83.0°F (−0.5), 2026 88.4°F (+4.9). 3 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 86.5°F | +3.0°F | 0.32 in |
| 2022 | 80.7°F | −2.8°F | 2.45 in |
| 2023 | 89.2°F | +5.7°F | 0.08 in |
| 2024 | 83.2°F | −0.3°F | 6.68 in |
| 2025 | 83.0°F | −0.5°F | 0.41 in |
| 2026 | 88.4°F | +4.9°F | 0.46 in |
Source: records: ACIS, NWS threaded record DRTthr; recent months: ACIS, station USW00022010. Records and recent months use complete months only.
How does September in Del Rio 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; Del Rio's is 94°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.