Pittsburgh, PA weather in August
Pittsburgh is warm in August, with frequent rain: highs average 82°F and nights drop to about 62°F. Rain falls on about 11 days. This is the peak of the warm season in Pittsburgh. A good month for most outdoor plans.
- Normal high
- 82°F
- Normal low
- 62°F
- Wet days
- 11
- 3.5 in total
- Muggy days
- 8
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 83°F | 80°F |
| Normal low | 63°F | 60°F |
| Chance of a wet day | 36% | 32% |
| Sunrise / sunset | 6:17 am / 8:35 pm | 6:46 am / 7:54 pm |
| Daylight | 14.3 h | 13.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical August day
- 6 am64°Fdew point 61°F
- 9 am71°Fdew point 62°F
- Noon77°Fdew point 62°F
- 3 pm80°Fdew point 61°F
- 6 pm77°Fdew point 61°F
- 9 pm72°Fdew point 61°F
NOAA hourly normals (local standard time) from Pittsburgh Allegheny Co Airport (7 mi away); average wind 6 mph; clear or few clouds in 42% of daytime hours, mostly cloudy or overcast in 43%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F8 of 31
- Hot dayshigh 90°F or more3 of 31
- Muggy daysdaily mean dew point 65°F or more8 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.5 in; a dry August brings about 2.3 in and a wet one about 4.3 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20201995: average high 89°F
- Coolest August1992: average high 78°F
- Wettest August1994: 7.8 in
- Driest August2006: 1.6 in
- Highest reading98°F (August 26, 1993)
- Lowest reading47°F (August 15, 2013)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 83°F | 82°F | 75°F |
| Normal low | 63°F | 62°F | 55°F |
| Wet days | 11 | 11 | 10 |
| Comfortable days | 5 | 8 | 15 |
| Daylight | 14.7 h | 13.7 h | 12.4 h |
Highs change by -1°F from July and -7°F into September.
Nearby alternatives in August
- Warmer: Washington, DC190 mi · high 88°F · 9 wet days
How Pittsburgh ranks in August
- Normal high287th warmest of 378 cities; 4th of 4 in Pennsylvania
- Wet days294th driest of 378
- Comfortable days94th most of 341
What to pack for Pittsburgh in August
- A rain jacket or umbrella – rain on about 11 days
Heating and cooling
August has 7 heating degree days and 219 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Pittsburgh in August?
The normal high is 82°F and the normal low is 62°F. From 1991 to 2020 the hottest August reading was 98°F (August 26, 1993).
Does it rain a lot in Pittsburgh in August?
About 11 days in August have at least 0.01 in of precipitation, and the normal total is 3.5 in. The wettest August in 1991-2020 was in 1994 (7.8 in); the driest was in 2006 (1.6 in).
Is August a good time to visit Pittsburgh?
August ranks 5th of 12 months on our comfort score for Pittsburgh (60 out of 100). It has about 8 comfortable days and about 3 days at 90°F or hotter. The best months are May and September.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Pittsburgh Intl Airport (USW00094823), 12 mi WNW of the city center, 1,203 ft (438 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Emsworth L/D Ohio Rvr (USC00362574), 6.6 mi NW of the city center, 717 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Pittsburgh Allegheny Co Airport (USW00014762), 7.1 mi SSE of the city center, 1,248 ft (483 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Pittsburgh International Airport (725200-94823), 12 mi WNW of the city center, 1,119 ft (354 ft higher than the city). Hourly observations, 1991-2020.