August is one of the warmer months of the year in Pittsburgh, with average highs near 29.1°C and lows around 15.8°C (mean 22.5°C). It is about average for rainfall, averaging 85 mm of rainfall and 69% relative humidity across the period.
August is one of the warmer months of the year in Pittsburgh. Across 45 years of records, the warmest August in Pittsburgh was 2016 — when the month averaged 25.1°C — while the coldest was 1992 at 19.8°C. Typical August days reach 29.1°C with nights near 15.8°C. The long-term trend is warming, about 0.3°C per decade.
August is about average for rainfall in Pittsburgh, averaging 85 mm of rainfall. The wettest August on record was 1994 with 170 mm, while the driest was 2025 at 22 mm.
Relative humidity in Pittsburgh during August averages 69%. The most humid Augusts were 1990 and 2004 at 78%, and the least humid was 2025 at 59%.
August receives about 5.2 kWh/m²/day of solar energy in Pittsburgh. The sunniest August was 2025 at 5.8 kWh/m²/day, and the cloudiest were 1987 and 1990 at 4.6.
Average wind speed in Pittsburgh during August is 0.2 m/s. The windiest Augusts were 2023, 2024 and 2025, among others at 0.2 m/s, while the calmest was 2018 at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.9°C | 22.0°C | 22.7°C | 22.7°C | 23.2°C | +1.3°C |
| Avg High | 28.7°C | 28.8°C | 29.2°C | 29.3°C | 29.8°C | +1.1°C |
| Avg Low | 15.1°C | 15.3°C | 16.2°C | 16.2°C | 16.6°C | +1.5°C |
| Avg Rain | 87 mm | 86 mm | 90 mm | 72 mm | 92 mm | +5 mm |
August temperatures in Pittsburgh have risen by about 1.3°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.4°C (1982) to a record high of 37.4°C (1988).
Rainfall in August is about average for rainfall, averaging 85 mm, with a wettest year of 170 mm.
One of the best times to visit Pittsburgh
August is one of the best times to visit Pittsburgh. Expect days averaging 29.1°C and nights around 15.8°C (mean 22.5°C) — warmer than Pittsburgh's yearly average — with higher rainfall (85 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 30.1°C | 22.6°C | 15.0°C | 35.7°C | 7.8°C | 22 mm | 59% | 0.2 m/s | 5.8 |
| 2024 | 30.0°C | 23.3°C | 16.6°C | 35.9°C | 8.8°C | 90 mm | 69% | 0.2 m/s | 5.1 |
| 2023 | 28.6°C | 22.1°C | 15.6°C | 32.3°C | 9.8°C | 126 mm | 72% | 0.2 m/s | 5.2 |
| 2022 | 29.4°C | 23.1°C | 16.8°C | 34.5°C | 10.9°C | 101 mm | 71% | 0.2 m/s | 5.1 |
| 2021 | 30.3°C | 24.3°C | 18.3°C | 35.1°C | 12.4°C | 131 mm | 71% | 0.2 m/s | 4.9 |
| 2020 | 30.6°C | 24.0°C | 17.3°C | 35.0°C | 11.0°C | 82 mm | 64% | 0.2 m/s | 5.3 |
| 2019 | 28.7°C | 22.5°C | 16.3°C | 32.7°C | 10.3°C | 58 mm | 72% | 0.2 m/s | 5.4 |
| 2018 | 29.9°C | 23.8°C | 17.8°C | 34.6°C | 10.8°C | 83 mm | 74% | 0.1 m/s | 4.8 |
| 2017 | 28.3°C | 21.7°C | 15.2°C | 32.5°C | 9.9°C | 56 mm | 69% | 0.2 m/s | 5.2 |
| 2016 🔥 | 31.5°C | 25.1°C | 18.7°C | 35.2°C | 13.4°C | 67 mm | 68% | 0.2 m/s | 5.4 |
| 2015 | 29.5°C | 22.2°C | 15.0°C | 34.1°C | 11.1°C | 42 mm | 63% | 0.2 m/s | 5.5 |
| 2014 | 27.7°C | 21.3°C | 14.8°C | 31.2°C | 8.3°C | 112 mm | 72% | 0.2 m/s | 5.4 |
| 2013 | 27.9°C | 21.5°C | 15.1°C | 31.9°C | 9.2°C | 78 mm | 72% | 0.2 m/s | 5.2 |
| 2012 | 29.6°C | 22.4°C | 15.3°C | 34.2°C | 10.5°C | 61 mm | 66% | 0.2 m/s | 5.7 |
| 2011 | 28.9°C | 22.5°C | 16.2°C | 32.8°C | 10.9°C | 110 mm | 70% | 0.2 m/s | 5.3 |
| 2010 | 31.2°C | 24.3°C | 17.4°C | 35.3°C | 11.0°C | 57 mm | 63% | 0.2 m/s | 5.3 |
| 2009 | 28.3°C | 22.3°C | 16.3°C | 33.6°C | 8.8°C | 75 mm | 74% | 0.2 m/s | 5.1 |
| 2008 | 28.2°C | 21.3°C | 14.3°C | 32.9°C | 10.8°C | 49 mm | 66% | 0.2 m/s | 5.7 |
| 2007 | 28.3°C | 22.7°C | 17.1°C | 34.7°C | 10.8°C | 169 mm | 77% | 0.2 m/s | 5 |
| 2006 | 30.4°C | 23.5°C | 16.5°C | 35.3°C | 9.3°C | 64 mm | 65% | 0.2 m/s | 5.5 |
| 2005 | 30.9°C | 24.2°C | 17.5°C | 36.0°C | 11.5°C | 83 mm | 65% | 0.2 m/s | 4.9 |
| 2004 | 26.0°C | 20.3°C | 14.6°C | 30.6°C | 9.3°C | 122 mm | 78% | 0.2 m/s | 5 |
| 2003 | 29.3°C | 23.2°C | 17.1°C | 33.3°C | 10.7°C | 101 mm | 74% | 0.2 m/s | 5 |
| 2002 | 31.5°C | 24.1°C | 16.7°C | 37.3°C | 10.6°C | 64 mm | 61% | 0.2 m/s | 5.6 |
| 2001 | 31.2°C | 24.1°C | 17.0°C | 36.7°C | 12.1°C | 88 mm | 63% | 0.2 m/s | 5 |
| 2000 | 27.7°C | 21.2°C | 14.7°C | 31.1°C | 7.2°C | 86 mm | 71% | 0.2 m/s | 4.7 |
| 1999 | 28.8°C | 21.6°C | 14.4°C | 34.2°C | 8.5°C | 66 mm | 64% | 0.2 m/s | 5.2 |
| 1998 | 30.8°C | 23.5°C | 16.2°C | 34.0°C | 8.8°C | 83 mm | 63% | 0.2 m/s | 5.4 |
| 1997 | 27.4°C | 21.1°C | 14.8°C | 32.4°C | 9.1°C | 126 mm | 70% | 0.2 m/s | 4.7 |
| 1996 | 28.0°C | 21.4°C | 14.8°C | 31.9°C | 11.4°C | 67 mm | 72% | 0.2 m/s | 5.5 |
| 1995 | 31.8°C | 24.8°C | 17.9°C | 36.0°C | 11.2°C | 63 mm | 65% | 0.2 m/s | 5.5 |
| 1994 🌧️ | 26.3°C | 20.1°C | 14.0°C | 31.2°C | 6.3°C | 170 mm | 76% | 0.2 m/s | 4.8 |
| 1993 | 31.0°C | 23.6°C | 16.1°C | 36.1°C | 10.6°C | 55 mm | 62% | 0.2 m/s | 5.3 |
| 1992 ❄️ | 26.1°C | 19.8°C | 13.4°C | 32.0°C | 8.3°C | 87 mm | 74% | 0.2 m/s | 5.3 |
| 1991 | 30.7°C | 23.5°C | 16.2°C | 35.9°C | 11.6°C | 57 mm | 60% | 0.2 m/s | 5.2 |
| 1990 | 26.8°C | 20.9°C | 14.9°C | 30.9°C | 9.8°C | 83 mm | 78% | 0.2 m/s | 4.6 |
| 1989 | 27.3°C | 21.3°C | 15.2°C | 31.1°C | 9.0°C | 47 mm | 74% | 0.2 m/s | 4.9 |
| 1988 | 31.2°C | 24.0°C | 16.8°C | 37.4°C | 8.0°C | 88 mm | 62% | 0.2 m/s | 5.1 |
| 1987 | 29.0°C | 22.2°C | 15.5°C | 34.7°C | 7.5°C | 153 mm | 69% | 0.2 m/s | 4.6 |
| 1986 | 27.5°C | 20.8°C | 14.1°C | 31.0°C | 5.7°C | 64 mm | 67% | 0.2 m/s | 5.4 |
| 1985 | 28.0°C | 21.4°C | 14.7°C | 34.4°C | 9.7°C | 80 mm | 68% | 0.2 m/s | 4.8 |
| 1984 | 28.0°C | 21.8°C | 15.7°C | 32.7°C | 7.5°C | 139 mm | 77% | 0.2 m/s | 5.4 |
| 1983 | 31.1°C | 23.8°C | 16.4°C | 36.1°C | 10.1°C | 76 mm | 65% | 0.2 m/s | — |
| 1982 | 28.1°C | 20.7°C | 13.4°C | 34.6°C | 3.4°C | 73 mm | 64% | 0.2 m/s | — |
| 1981 | 28.3°C | 21.2°C | 14.0°C | 31.7°C | 6.1°C | 62 mm | 67% | 0.2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 29.1°C with lows near 15.8°C (mean 22.5°C), based on 45 years of NASA POWER data.
August averages 85 mm of rainfall in Pittsburgh, about average for rainfall. The wettest on record was 170 mm in 1994.
The hottest August reached 37.4°C in 1988. The coldest dipped to 3.4°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.3°C. Daytime highs moved from 28.7°C to 29.7°C and overnight lows from 14.8°C to 16.5°C over the same span.
August is one of the warmer months of the year in Pittsburgh and about average for rainfall, so plan for around 29.1°C daytime highs and 15.8°C at night.
Not quite — August is the 11th coolest month in Pittsburgh, averaging 22.5°C.
For August in Pittsburgh, pack light layers you can adjust through the day, with typical highs of 29.1°C and lows of 15.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 69% — moderately humid.
Average wind speed in August is 0.2 m/s. The windiest August on record averaged 0.2 m/s (1981).
The wettest August on record was 1994 with 170 mm. On average, August sees 85 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Pittsburgh behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
