McAlester weather in September: McAlester, Oklahoma: normal highs, lows, rain and records for September
McAlester in September has a normal high of 86°F and a normal low of 63°F, a daily mean of 74°F, falling from 90°F on the 1st to 81°F by the 30th. Measurable precipitation falls on 7 days in a normal September, 3.66 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 17°C, 93 mm of precipitation in September.
- NOAA stationMcAlester Regional Airport
- Station IDUSW00093950
- Location34.88°N 95.78°W
- Elevation770 ft (235 m)
- Population18,108
- Jan 52° 30°
- Feb 57° 34°
- Mar 65° 42°
- Apr 73° 50°
- May 80° 60°
- Jun 88° 68°
- Jul 93° 72°
- Aug 93° 71°
- Sep 86° 63°
- Oct 75° 52°
- Nov 63° 41°
- Dec 54° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is McAlester in September?
The normal high is 86°F and the normal low 63°F, for a daily mean of 74.3°F. September is 7.6°F cooler than August and 11.0°F warmer than October. September is the 4th warmest month of the year in McAlester and the 5th wettest. Across the month the normal high falls 9°F, from 90°F on September 1 to 81°F on September 30. From one year to the next September's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 71°F and 77°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 24%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 90°F | 68°F | 24% | 14% |
| September 8 | 88°F | 66°F | 23% | 15% |
| September 15 | 86°F | 63°F | 23% | 16% |
| September 22 | 84°F | 61°F | 23% | 16% |
| September 30 | 81°F | 58°F | 22% | 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 | 90°F | 68°F | 24% | 14% | 13 h |
| September 2 | 90°F | 67°F | 24% | 15% | 12 h 50 min |
| September 3 | 90°F | 67°F | 24% | 15% | 12 h 50 min |
| September 4 | 89°F | 67°F | 24% | 15% | 12 h 50 min |
| September 5 | 89°F | 67°F | 24% | 15% | 12 h 50 min |
| September 6 | 89°F | 66°F | 24% | 15% | 12 h 50 min |
| September 7 | 89°F | 66°F | 24% | 15% | 12 h 40 min |
| September 8 | 88°F | 66°F | 23% | 15% | 12 h 40 min |
| September 9 | 88°F | 65°F | 23% | 15% | 12 h 40 min |
| September 10 | 88°F | 65°F | 23% | 15% | 12 h 40 min |
| September 11 | 87°F | 65°F | 23% | 15% | 12 h 40 min |
| September 12 | 87°F | 64°F | 23% | 15% | 12 h 30 min |
| September 13 | 87°F | 64°F | 23% | 15% | 12 h 30 min |
| September 14 | 86°F | 64°F | 23% | 16% | 12 h 30 min |
| September 15 | 86°F | 63°F | 23% | 16% | 12 h 30 min |
| September 16 | 86°F | 63°F | 23% | 16% | 12 h 20 min |
| September 17 | 85°F | 63°F | 23% | 16% | 12 h 20 min |
| September 18 | 85°F | 62°F | 23% | 16% | 12 h 20 min |
| September 19 | 85°F | 62°F | 23% | 16% | 12 h 20 min |
| September 20 | 84°F | 61°F | 23% | 16% | 12 h 20 min |
| September 21 | 84°F | 61°F | 23% | 16% | 12 h 10 min |
| September 22 | 84°F | 61°F | 23% | 16% | 12 h 10 min |
| September 23 | 83°F | 60°F | 23% | 16% | 12 h 10 min |
| September 24 | 83°F | 60°F | 23% | 16% | 12 h 10 min |
| September 25 | 83°F | 60°F | 23% | 16% | 12 h 10 min |
| September 26 | 82°F | 59°F | 22% | 16% | 12 h |
| September 27 | 82°F | 59°F | 22% | 16% | 12 h |
| September 28 | 82°F | 58°F | 22% | 16% | 12 h |
| September 29 | 81°F | 58°F | 22% | 16% | 12 h |
| September 30 | 81°F | 58°F | 22% | 16% | 11 h 50 min |
- Normal high
- 86°FSeptember average
- Normal low
- 63°FSeptember average
- Precipitation
- 3.66 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 10
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 29
- Days at 80°F or more
- 24
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093950; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in McAlester in September?
On a given September day the chance of 0.01 inch or more is 23% on average, highest around September 1 (24%). In all, 3.66 in falls on 7 days of a normal September, 1 of them with an inch or more.
In a normal September in McAlester, 10 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093950.
How humid and windy is McAlester in September?
At 3 p.m. the normal temperature is 80°F with 44% relative humidity and a dew point of 56°F; at 6 a.m. it is 60°F with 85% humidity. The wind averages 6.0 mph, most often from the south in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 60°F | 56°F | 85% | 4.0 mph | 75% |
| 9 a.m. | 69°F | 58°F | 68% | 7.4 mph | 74% |
| noon | 77°F | 56°F | 49% | 8.9 mph | 75% |
| 3 p.m. | 80°F | 56°F | 44% | 8.4 mph | 78% |
| 6 p.m. | 74°F | 57°F | 55% | 5.6 mph | 81% |
| 9 p.m. | 66°F | 57°F | 73% | 4.4 mph | 82% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093950. 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 McAlester?
The warmest September temperature on this station's record (since 1953) is 110°F, on September 4, 1998; the coldest is 34°F, on September 30, 1984. The wettest September brought 12.53 in (1967).
The September mean against the 1991-2020 normal of 74.3°F: 2021 77.3°F (+3.0), 2022 77.2°F (+2.9), 2023 77.3°F (+3.0), 2024 75.3°F (+1.0), 2025 75.7°F (+1.4), 2026 85.9°F (+11.6). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 77.3°F | +3.0°F | 1.55 in |
| 2022 | 77.2°F | +2.9°F | 0.20 in |
| 2023 | 77.3°F | +3.0°F | 3.89 in |
| 2024 | 75.3°F | +1.0°F | 1.98 in |
| 2025 | 75.7°F | +1.4°F | 1.77 in |
| 2026 | 85.9°F | +11.6°F | 0.86 in |
Source: records: ACIS, station USW00093950; recent months: ACIS, station USW00093950. Records and recent months use complete months only.
How does September in McAlester compare across Oklahoma?
Across the 134 places PlainClimate covers in Oklahoma, September normal highs run from 82°F in Arnett to 89°F in Grandfield; McAlester's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.