McKinney weather in August: McKinney, Texas: normal highs, lows, rain and records for August
McKinney in August has a normal high of 96°F and a normal low of 73°F, a daily mean of 84°F, falling from 97°F on the 1st to 93°F by the 31st. Measurable precipitation falls on 5 days in a normal August, 1.73 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 35°C and low of 23°C, 44 mm of precipitation in August.
- NOAA stationMcKinney Municipal Airport
- Station IDUSW00053914
- Location33.18°N 96.59°W
- Elevation580 ft (177 m)
- Population227,526
- Jan 56° 34°
- Feb 60° 38°
- Mar 68° 46°
- Apr 75° 53°
- May 83° 62°
- Jun 91° 70°
- Jul 95° 74°
- Aug 96° 73°
- Sep 88° 66°
- Oct 78° 54°
- Nov 66° 44°
- Dec 57° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is McKinney in August?
The normal high is 96°F and the normal low 73°F, for a daily mean of 84.3°F. August is 0.1°F cooler than July and 7.4°F warmer than September. August is the 2nd warmest month of the year in McKinney and the 12th wettest. Across the month the normal high falls 4°F, from 97°F on August 1 to 93°F on August 31. From one year to the next August's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 82°F and 87°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 21%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 97°F | 75°F | 16% | 9% |
| August 8 | 97°F | 74°F | 17% | 9% |
| August 15 | 96°F | 74°F | 18% | 10% |
| August 22 | 95°F | 73°F | 20% | 11% |
| August 31 | 93°F | 70°F | 21% | 12% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 97°F | 75°F | 16% | 9% | 13 h 50 min |
| August 2 | 97°F | 75°F | 16% | 9% | 13 h 50 min |
| August 3 | 97°F | 75°F | 16% | 9% | 13 h 50 min |
| August 4 | 97°F | 75°F | 16% | 9% | 13 h 40 min |
| August 5 | 97°F | 74°F | 16% | 9% | 13 h 40 min |
| August 6 | 97°F | 74°F | 16% | 9% | 13 h 40 min |
| August 7 | 97°F | 74°F | 17% | 9% | 13 h 40 min |
| August 8 | 97°F | 74°F | 17% | 9% | 13 h 40 min |
| August 9 | 97°F | 74°F | 17% | 9% | 13 h 40 min |
| August 10 | 97°F | 74°F | 17% | 9% | 13 h 30 min |
| August 11 | 97°F | 74°F | 17% | 9% | 13 h 30 min |
| August 12 | 96°F | 74°F | 18% | 10% | 13 h 30 min |
| August 13 | 96°F | 74°F | 18% | 10% | 13 h 30 min |
| August 14 | 96°F | 74°F | 18% | 10% | 13 h 30 min |
| August 15 | 96°F | 74°F | 18% | 10% | 13 h 30 min |
| August 16 | 96°F | 73°F | 19% | 10% | 13 h 20 min |
| August 17 | 96°F | 73°F | 19% | 10% | 13 h 20 min |
| August 18 | 96°F | 73°F | 19% | 10% | 13 h 20 min |
| August 19 | 95°F | 73°F | 19% | 11% | 13 h 20 min |
| August 20 | 95°F | 73°F | 19% | 11% | 13 h 20 min |
| August 21 | 95°F | 73°F | 19% | 11% | 13 h 10 min |
| August 22 | 95°F | 73°F | 20% | 11% | 13 h 10 min |
| August 23 | 95°F | 72°F | 20% | 11% | 13 h 10 min |
| August 24 | 94°F | 72°F | 20% | 11% | 13 h 10 min |
| August 25 | 94°F | 72°F | 20% | 11% | 13 h 10 min |
| August 26 | 94°F | 72°F | 20% | 11% | 13 h |
| August 27 | 94°F | 71°F | 21% | 12% | 13 h |
| August 28 | 94°F | 71°F | 21% | 12% | 13 h |
| August 29 | 93°F | 71°F | 21% | 12% | 13 h |
| August 30 | 93°F | 71°F | 21% | 12% | 13 h |
| August 31 | 93°F | 70°F | 21% | 12% | 13 h |
- Normal high
- 96°FAugust average
- Normal low
- 73°FAugust average
- Precipitation
- 1.73 inmonth total
- Days with precipitation
- 50.01 inch or more
- Days at 90°F or more
- 27
- Daylight
- 13 h 50 min to 13 hAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 86%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053914; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in McKinney in August?
On a given August day the chance of 0.01 inch or more is 18% on average, highest around August 31 (21%). In all, 1.73 in falls on 5 days of a normal August, 1 of them with an inch or more.
In a normal August in McKinney, 27 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053914.
What are the records for August in McKinney?
The warmest August temperature on this station's record (since 1998) is 109°F, on August 6, 2003; the coldest is 54°F, on August 12, 2004. The wettest August brought 6.97 in (2008).
The August mean against the 1991-2020 normal of 84.3°F: 2021 83.8°F (−0.5), 2022 85.0°F (+0.7), 2023 89.3°F (+5.0), 2024 87.5°F (+3.2), 2025 83.8°F (−0.5), 2026 88.5°F (+4.2). 4 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 83.8°F | −0.5°F | 4.03 in |
| 2022 | 85.0°F | +0.7°F | 3.13 in |
| 2023 | 89.3°F | +5.0°F | 0.01 in |
| 2024 | 87.5°F | +3.2°F | 0.05 in |
| 2025 | 83.8°F | −0.5°F | 1.75 in |
| 2026 | 88.5°F | +4.2°F | – |
Source: records: ACIS, station USW00053914; recent months: ACIS, station USW00053914. Records and recent months use complete months only.
How does August in McKinney compare across Texas?
Across the 321 places PlainClimate covers in Texas, August normal highs run from 87°F in Marfa to 101°F in Del Rio; McKinney's is 96°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.