Waco weather in September: Waco, Texas: normal highs, lows, rain and records for September
Waco in September has a normal high of 91°F and a normal low of 67°F, a daily mean of 79°F, falling from 95°F on the 1st to 87°F by the 30th. Measurable precipitation falls on 6 days in a normal September, 2.87 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 19°C, 73 mm of precipitation in September.
- NOAA stationWaco Regional Airport
- Station IDUSW00013959
- Location31.62°N 97.23°W
- Elevation500 ft (152 m)
- From the center5 miles
- Population146,608
- Jan 59° 36°
- Feb 63° 40°
- Mar 70° 47°
- Apr 78° 55°
- May 85° 63°
- Jun 93° 71°
- Jul 97° 74°
- Aug 97° 74°
- Sep 91° 67°
- Oct 81° 56°
- Nov 69° 46°
- Dec 60° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Waco in September?
The normal high is 91°F and the normal low 67°F, for a daily mean of 78.7°F. September is 6.8°F cooler than August and 10.3°F warmer than October. September is the 4th warmest month of the year in Waco and the 6th wettest. Across the month the normal high falls 8°F, from 95°F on September 1 to 87°F on September 30. From one year to the next September's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 76°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 20%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 95°F | 71°F | 20% | 12% |
| September 8 | 93°F | 69°F | 20% | 13% |
| September 15 | 91°F | 67°F | 20% | 13% |
| September 22 | 89°F | 65°F | 19% | 13% |
| September 30 | 87°F | 62°F | 18% | 13% |
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 | 95°F | 71°F | 20% | 12% | 12 h 50 min |
| September 2 | 94°F | 71°F | 20% | 12% | 12 h 50 min |
| September 3 | 94°F | 71°F | 20% | 13% | 12 h 50 min |
| September 4 | 94°F | 70°F | 20% | 13% | 12 h 50 min |
| September 5 | 94°F | 70°F | 20% | 13% | 12 h 40 min |
| September 6 | 93°F | 70°F | 20% | 13% | 12 h 40 min |
| September 7 | 93°F | 69°F | 20% | 13% | 12 h 40 min |
| September 8 | 93°F | 69°F | 20% | 13% | 12 h 40 min |
| September 9 | 93°F | 69°F | 20% | 13% | 12 h 40 min |
| September 10 | 92°F | 69°F | 20% | 13% | 12 h 30 min |
| September 11 | 92°F | 68°F | 20% | 13% | 12 h 30 min |
| September 12 | 92°F | 68°F | 20% | 13% | 12 h 30 min |
| September 13 | 92°F | 68°F | 20% | 13% | 12 h 30 min |
| September 14 | 91°F | 67°F | 20% | 13% | 12 h 30 min |
| September 15 | 91°F | 67°F | 20% | 13% | 12 h 20 min |
| September 16 | 91°F | 67°F | 19% | 13% | 12 h 20 min |
| September 17 | 91°F | 66°F | 19% | 13% | 12 h 20 min |
| September 18 | 90°F | 66°F | 19% | 13% | 12 h 20 min |
| September 19 | 90°F | 66°F | 19% | 13% | 12 h 20 min |
| September 20 | 90°F | 65°F | 19% | 13% | 12 h 10 min |
| September 21 | 89°F | 65°F | 19% | 13% | 12 h 10 min |
| September 22 | 89°F | 65°F | 19% | 13% | 12 h 10 min |
| September 23 | 89°F | 64°F | 19% | 13% | 12 h 10 min |
| September 24 | 89°F | 64°F | 19% | 13% | 12 h 10 min |
| September 25 | 88°F | 64°F | 19% | 13% | 12 h 10 min |
| September 26 | 88°F | 63°F | 18% | 13% | 12 h |
| September 27 | 88°F | 63°F | 18% | 13% | 12 h |
| September 28 | 87°F | 63°F | 18% | 13% | 12 h |
| September 29 | 87°F | 62°F | 18% | 13% | 12 h |
| September 30 | 87°F | 62°F | 18% | 13% | 12 h |
- Normal high
- 91°FSeptember average
- Normal low
- 67°FSeptember average
- Precipitation
- 2.87 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 19
- 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
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013959; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Waco in September?
On a given September day the chance of 0.01 inch or more is 19% on average, highest around September 4 (20%). In all, 2.87 in falls on 6 days of a normal September, 1 of them with an inch or more.
In a normal September in Waco, 19 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013959.
How humid and windy is Waco in September?
At 3 p.m. the normal temperature is 86°F with 39% relative humidity and a dew point of 58°F; at 6 a.m. it is 64°F with 85% humidity. The wind averages 8.2 mph, most often from the southeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 64°F | 60°F | 85% | 6.2 mph | 67% |
| 9 a.m. | 73°F | 62°F | 67% | 8.5 mph | 68% |
| noon | 82°F | 60°F | 46% | 10.0 mph | 64% |
| 3 p.m. | 86°F | 58°F | 39% | 10.6 mph | 71% |
| 6 p.m. | 81°F | 58°F | 46% | 8.8 mph | 80% |
| 9 p.m. | 72°F | 59°F | 63% | 7.8 mph | 86% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013959. 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 Waco?
The warmest September temperature on Waco's official record (since 1901) is 111°F, on September 4, 2000; the coldest is 39°F, on September 27, 1942. The wettest September brought 11.17 in (1913).
The September mean against the 1991-2020 normal of 78.7°F: 2021 79.8°F (+1.1), 2022 81.3°F (+2.6), 2023 84.1°F (+5.4), 2024 79.4°F (+0.7), 2025 79.5°F (+0.8), 2026 87.3°F (+8.6). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 79.8°F | +1.1°F | 0.94 in |
| 2022 | 81.3°F | +2.6°F | 0.41 in |
| 2023 | 84.1°F | +5.4°F | 3.34 in |
| 2024 | 79.4°F | +0.7°F | 1.17 in |
| 2025 | 79.5°F | +0.8°F | 2.53 in |
| 2026 | 87.3°F | +8.6°F | 0.65 in |
Source: records: ACIS, NWS threaded record ACTthr; recent months: ACIS, station USW00013959. Records and recent months use complete months only.
How does September in Waco 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; Waco's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.