Harrisburg weather in August: Harrisburg, Pennsylvania: normal highs, lows, rain and records for August
Harrisburg in August has a normal high of 85°F and a normal low of 66°F, a daily mean of 75°F, falling from 87°F on the 1st to 83°F by the 31st. Measurable precipitation falls on 11 days in a normal August, 3.68 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 19°C, 93 mm of precipitation in August.
- NOAA stationHarrisburg Capitol Cy Airport
- Station IDUSW00014751
- Location40.22°N 76.85°W
- Elevation340 ft (104 m)
- From the center4 miles
- Population50,649
- Jan 40° 25°
- Feb 43° 26°
- Mar 53° 34°
- Apr 65° 43°
- May 75° 53°
- Jun 83° 63°
- Jul 88° 67°
- Aug 85° 66°
- Sep 79° 58°
- Oct 67° 47°
- Nov 55° 37°
- Dec 44° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Harrisburg in August?
The normal high is 85°F and the normal low 66°F, for a daily mean of 75.4°F. August is 2.1°F cooler than July and 6.9°F warmer than September. August is the 2nd warmest month of the year in Harrisburg and the 5th wettest. Across the month the normal high falls 4°F, from 87°F on August 1 to 83°F on August 31. From one year to the next August's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 73°F and 78°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 | 87°F | 67°F | 38% | 24% |
| August 8 | 86°F | 67°F | 37% | 23% |
| August 15 | 86°F | 66°F | 36% | 22% |
| August 22 | 85°F | 65°F | 34% | 20% |
| August 31 | 83°F | 63°F | 32% | 18% |
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 | 87°F | 67°F | 38% | 24% | 14 h 20 min |
| August 2 | 87°F | 67°F | 38% | 24% | 14 h 20 min |
| August 3 | 87°F | 67°F | 38% | 24% | 14 h 10 min |
| August 4 | 87°F | 67°F | 38% | 23% | 14 h 10 min |
| August 5 | 87°F | 67°F | 38% | 23% | 14 h 10 min |
| August 6 | 87°F | 67°F | 38% | 23% | 14 h 10 min |
| August 7 | 86°F | 67°F | 38% | 23% | 14 h 10 min |
| August 8 | 86°F | 67°F | 37% | 23% | 14 h |
| August 9 | 86°F | 67°F | 37% | 23% | 14 h |
| August 10 | 86°F | 66°F | 37% | 23% | 14 h |
| August 11 | 86°F | 66°F | 37% | 23% | 14 h |
| August 12 | 86°F | 66°F | 37% | 22% | 14 h |
| August 13 | 86°F | 66°F | 37% | 22% | 13 h 50 min |
| August 14 | 86°F | 66°F | 36% | 22% | 13 h 50 min |
| August 15 | 86°F | 66°F | 36% | 22% | 13 h 50 min |
| August 16 | 86°F | 66°F | 36% | 22% | 13 h 50 min |
| August 17 | 85°F | 66°F | 36% | 21% | 13 h 40 min |
| August 18 | 85°F | 65°F | 35% | 21% | 13 h 40 min |
| August 19 | 85°F | 65°F | 35% | 21% | 13 h 40 min |
| August 20 | 85°F | 65°F | 35% | 21% | 13 h 40 min |
| August 21 | 85°F | 65°F | 34% | 20% | 13 h 30 min |
| August 22 | 85°F | 65°F | 34% | 20% | 13 h 30 min |
| August 23 | 85°F | 65°F | 34% | 20% | 13 h 30 min |
| August 24 | 85°F | 64°F | 33% | 19% | 13 h 30 min |
| August 25 | 84°F | 64°F | 33% | 19% | 13 h 20 min |
| August 26 | 84°F | 64°F | 33% | 19% | 13 h 20 min |
| August 27 | 84°F | 64°F | 33% | 19% | 13 h 20 min |
| August 28 | 84°F | 64°F | 33% | 19% | 13 h 20 min |
| August 29 | 84°F | 64°F | 32% | 18% | 13 h 20 min |
| August 30 | 84°F | 63°F | 32% | 18% | 13 h 10 min |
| August 31 | 83°F | 63°F | 32% | 18% | 13 h 10 min |
- Normal high
- 85°FAugust average
- Normal low
- 66°FAugust average
- Precipitation
- 3.68 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 7
- Daylight
- 14 h 20 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 26
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014751; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Harrisburg 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, 3.68 in falls on 11 days of a normal August, 1 of them with an inch or more.
In a normal August in Harrisburg, 7 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014751.
What are the records for August in Harrisburg?
The warmest August temperature on this station's record (since 1939) is 101°F, on August 12, 1944; the coldest is 45°F, on August 31, 1976. The wettest August brought 9.07 in (1955).
The August mean against the 1991-2020 normal of 75.4°F: 2021 78.8°F (+3.4), 2022 78.6°F (+3.2), 2023 77.7°F (+2.3), 2024 75.7°F (+0.3), 2026 74.6°F (−0.8). 4 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 78.8°F | +3.4°F | 4.72 in |
| 2022 | 78.6°F | +3.2°F | 1.73 in |
| 2023 | 77.7°F | +2.3°F | 1.94 in |
| 2024 | 75.7°F | +0.3°F | 5.81 in |
| 2026 | 74.6°F | −0.8°F | 3.49 in |
Source: records: ACIS, station USW00014751; recent months: ACIS, station USW00014751. Records and recent months use complete months only.
How does August in Harrisburg compare across Pennsylvania?
Across the 108 places PlainClimate covers in Pennsylvania, August normal highs run from 75°F in Laporte to 87°F in Marcus Hook; Harrisburg's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Harrisburg in July88°F by day, 67°F at night
- Harrisburg in September79°F by day, 58°F at night
- Harrisburg through the yearEvery month, frost dates, records and recent years
- Pennsylvania in AugustThe statewide normal and the warmest and coolest places
- Marcus Hook: Pennsylvania's warmest Augustnormal high 87°F