Raleigh weather in August: Raleigh, North Carolina: normal highs, lows, rain and records for August
Raleigh in August has a normal high of 89°F and a normal low of 69°F, a daily mean of 79°F, falling from 90°F on the 1st to 87°F by the 31st. Measurable precipitation falls on 11 days in a normal August, 4.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 32°C and low of 21°C, 120 mm of precipitation in August.
- NOAA stationRaleigh-Durham International Airport
- Station IDUSW00013722
- Location35.89°N 78.78°W
- Elevation416 ft (127 m)
- From the center9 miles
- Population499,825
- Jan 52° 32°
- Feb 56° 34°
- Mar 63° 40°
- Apr 73° 49°
- May 80° 58°
- Jun 87° 66°
- Jul 91° 70°
- Aug 89° 69°
- Sep 83° 63°
- Oct 73° 50°
- Nov 63° 40°
- Dec 55° 34°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Raleigh in August?
The normal high is 89°F and the normal low 69°F, for a daily mean of 78.8°F. August is 1.7°F cooler than July and 6.2°F warmer than September. August is the 2nd warmest month of the year in Raleigh and the 3rd wettest. Across the month the normal high falls 3°F, from 90°F on August 1 to 87°F on August 31. From one year to the next August's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 77°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 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 90°F | 70°F | 38% | 25% |
| August 8 | 90°F | 70°F | 37% | 25% |
| August 15 | 89°F | 69°F | 36% | 24% |
| August 22 | 88°F | 68°F | 33% | 22% |
| August 31 | 87°F | 67°F | 31% | 21% |
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 | 90°F | 70°F | 38% | 25% | 14 h |
| August 2 | 90°F | 70°F | 38% | 25% | 14 h |
| August 3 | 90°F | 70°F | 38% | 25% | 14 h |
| August 4 | 90°F | 70°F | 38% | 25% | 13 h 50 min |
| August 5 | 90°F | 70°F | 38% | 25% | 13 h 50 min |
| August 6 | 90°F | 70°F | 38% | 25% | 13 h 50 min |
| August 7 | 90°F | 70°F | 38% | 25% | 13 h 50 min |
| August 8 | 90°F | 70°F | 37% | 25% | 13 h 50 min |
| August 9 | 90°F | 70°F | 37% | 25% | 13 h 50 min |
| August 10 | 90°F | 70°F | 37% | 25% | 13 h 40 min |
| August 11 | 89°F | 70°F | 37% | 25% | 13 h 40 min |
| August 12 | 89°F | 69°F | 37% | 25% | 13 h 40 min |
| August 13 | 89°F | 69°F | 37% | 24% | 13 h 40 min |
| August 14 | 89°F | 69°F | 36% | 24% | 13 h 40 min |
| August 15 | 89°F | 69°F | 36% | 24% | 13 h 30 min |
| August 16 | 89°F | 69°F | 36% | 24% | 13 h 30 min |
| August 17 | 89°F | 69°F | 35% | 23% | 13 h 30 min |
| August 18 | 89°F | 69°F | 35% | 23% | 13 h 30 min |
| August 19 | 89°F | 69°F | 34% | 23% | 13 h 30 min |
| August 20 | 88°F | 69°F | 34% | 23% | 13 h 20 min |
| August 21 | 88°F | 69°F | 34% | 22% | 13 h 20 min |
| August 22 | 88°F | 68°F | 33% | 22% | 13 h 20 min |
| August 23 | 88°F | 68°F | 33% | 22% | 13 h 20 min |
| August 24 | 88°F | 68°F | 33% | 22% | 13 h 20 min |
| August 25 | 88°F | 68°F | 32% | 21% | 13 h 10 min |
| August 26 | 87°F | 68°F | 32% | 21% | 13 h 10 min |
| August 27 | 87°F | 68°F | 32% | 21% | 13 h 10 min |
| August 28 | 87°F | 68°F | 32% | 21% | 13 h 10 min |
| August 29 | 87°F | 67°F | 31% | 21% | 13 h |
| August 30 | 87°F | 67°F | 31% | 21% | 13 h |
| August 31 | 87°F | 67°F | 31% | 21% | 13 h |
- Normal high
- 89°FAugust average
- Normal low
- 69°FAugust average
- Precipitation
- 4.71 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 14
- Daylight
- 14 h to 13 hAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 29
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013722; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Raleigh in August?
On a given August day the chance of 0.01 inch or more is 35% on average, highest around August 1 (38%). In all, 4.71 in falls on 11 days of a normal August, 1 of them with an inch or more.
In a normal August in Raleigh, 14 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013722.
How humid and windy is Raleigh in August?
At 3 p.m. the normal temperature is 84°F with 54% relative humidity and a dew point of 66°F; at 6 a.m. it is 68°F with 92% humidity. The wind averages 5.6 mph, most often from the east-southeast in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 68°F | 66°F | 92% | 3.9 mph | 41% |
| 9 a.m. | 76°F | 67°F | 74% | 6.6 mph | 35% |
| noon | 83°F | 66°F | 58% | 7.4 mph | 23% |
| 3 p.m. | 84°F | 66°F | 54% | 7.8 mph | 17% |
| 6 p.m. | 81°F | 66°F | 62% | 6.6 mph | 28% |
| 9 p.m. | 74°F | 67°F | 79% | 4.6 mph | 40% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013722. 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 August in Raleigh?
The warmest August temperature on Raleigh's official record (since 1887) is 105°F, on August 18, 1988; the coldest is 46°F, on August 30, 1965. The wettest August brought 13.63 in (1908).
The August mean against the 1991-2020 normal of 78.8°F: 2021 80.8°F (+2.0), 2022 79.9°F (+1.1), 2023 81.0°F (+2.2), 2024 79.5°F (+0.7), 2025 74.7°F (−4.1), 2026 81.2°F (+2.4). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 80.8°F | +2.0°F | 3.27 in |
| 2022 | 79.9°F | +1.1°F | 0.91 in |
| 2023 | 81.0°F | +2.2°F | 1.83 in |
| 2024 | 79.5°F | +0.7°F | 8.89 in |
| 2025 | 74.7°F | −4.1°F | 7.99 in |
| 2026 | 81.2°F | +2.4°F | 1.21 in |
Source: records: ACIS, NWS threaded record RDUthr; recent months: ACIS, station USW00013722. Records and recent months use complete months only.
How does August in Raleigh compare across North Carolina?
Across the 131 places PlainClimate covers in North Carolina, August normal highs run from 68°F in Beech Mountain to 90°F in Southport; Raleigh's is 89°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.